Edgar Filing: VERTEX PHARMACEUTICALS INC / MA

Document

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

________________________________________________________

FORM 10-K



x	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Fiscal Year Ended December 31, 2016
or
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from to

Commission file number 000-19319

____________________________________________

Vertex Pharmaceuticals Incorporated

(Exact name of registrant as specified in its charter)



Massachusetts	04-3039129
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
50 Northern Avenue, Boston, Massachusetts	02210
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (617) 341-6100

____________________________________________

Securities registered pursuant to Section 12(b) of the Exchange Act:



Title of Each Class			Name of Each Exchange on Which Registered
Common Stock, $0.01 Par Value Per Share			The NASDAQ Global Select Market

Securities registered pursuant to Section 12(g) of the Exchange Act: None

______________________________________________

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes x No o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes o No x

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10 K. x

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):



Large accelerated filer x	Accelerated filer o	Non-accelerated filer o	Smaller reporting company o
	(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No x

The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant (without admitting that any person whose shares are not included in such calculation is an affiliate) based on the last reported sale price of the common stock on June 30, 2016 (the last trading day of the registrant’s second fiscal quarter of 2016) was $21.1 billion. As of February 10, 2017, the registrant had 248,438,127 shares of common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the definitive Proxy Statement for the 2017 Annual Meeting of Shareholders to be held on June 8, 2017 are incorporated by reference into Part III of this Annual Report on Form 10-K.

VERTEX PHARMACEUTICALS INCORPORATED

ANNUAL REPORT ON FORM 10-K

TABLE OF CONTENTS




PART I
Item 1.	Business	1
	Directors and Executive Officers of the Registrant	21
Item 1A.	Risk Factors	25
Item 1B.	Unresolved Staff Comments	47
Item 2.	Properties	47
Item 3.	Legal Proceedings	47
Item 4.	Mine Safety Disclosures	48
PART II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	49
Item 6.	Selected Financial Data	51
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	52
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	69
Item 8.	Financial Statements and Supplementary Data	70
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	70
Item 9A.	Controls and Procedures	70
Item 9B.	Other Information	72
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	73
Item 11.	Executive Compensation	73
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	73
Item 13.	Certain Relationships and Related Transactions, and Director Independence	73
Item 14.	Principal Accountant Fees and Services	73
PART IV
Item 15.	Exhibits and Financial Statement Schedules	74
	Signatures	77

“We,” “us,” “Vertex” and the “Company” as used in this Annual Report on Form 10-K refer to Vertex Pharmaceuticals Incorporated, a Massachusetts corporation, and its subsidiaries.

“Vertex,” “KALYDECO^®” and “ORKAMBI^®” are registered trademarks of Vertex. Other brands, names and trademarks contained in this Annual Report on Form 10-K are the property of their respective owners.

PART I


ITEM 1.	BUSINESS

OVERVIEW

We are in the business of discovering, developing, manufacturing and commercializing medicines for serious diseases. We use precision medicine approaches with the goal of creating transformative drugs for patients in specialty markets. Our business is focused on developing and commercializing therapies for the treatment of cystic fibrosis, or CF, and advancing our research and development programs in other indications, while maintaining our financial strength.

Cystic Fibrosis

Our two marketed medicines are ORKAMBI and KALYDECO, which together are approved to treat approximately 40% of the 75,000 CF patients in North America, Europe and Australia. ORKAMBI (lumacaftor in combination with ivacaftor) is approved as a treatment for approximately 25,000 patients who have two copies (homozygous) of the F508del mutation in their cystic fibrosis transmembrane conductance regulator, or CFTR, gene. KALYDECO (ivacaftor) is approved for the treatment of approximately 4,000 CF patients who have the G551D mutation or other specified mutations in their CFTR gene. Our goal is to develop treatment regimens that will provide benefits to as many patients with CF as possible and will enhance the benefits that currently are being provided to patients taking our medicines.

CF Development Programs

We have multiple development programs in the field of CF, including:

•

Tezacaftor (VX-661) is a corrector compound that we are evaluating in a Phase 3 development program in combination with ivacaftor in multiple CF patient populations who have at least one copy of the F508del mutation in their CFTR gene. We expect data from this Phase 3 development program in the first half of 2017. If supported by data from the Phase 3 development program, we plan to submit a New Drug Application, or NDA, to the United States Food and Drug Administration, or FDA for tezacaftor in combination with ivacaftor in the second half of 2017.


•	VX-152, VX-440, VX-659 and VX-445 are next-generation CFTR corrector compounds that we are evaluating as part of combination treatment regimens. We have initiated Phase 2 clinical trials of VX-152 and VX-440 and expect data from these clinical trials in the second half of 2017. We have initiated Phase 1 clinical trials of VX-659 and VX-445.


•	VX-371 is an investigational epithelial sodium channel, or ENaC, inhibitor that is being evaluated in a Phase 2 development program and which we exclusively licensed from Parion Sciences, Inc., or Parion, in 2015.

Research and Development Programs

We are engaged in a number of other research and mid- and early-stage development programs, including programs in the areas of pain and neurology. We also have entered into third-party collaborations pursuant to which we are engaged in the discovery and development of nucleic acid-based therapies for a variety of diseases, including CF. We plan to continue investing in our research programs and fostering scientific innovation in order to identify and develop transformative medicines. Our current research programs include programs targeting cystic fibrosis, adrenoleukodystrophy, alpha-1 antritrypsin deficiency, sickle cell disease and polycystic kidney disease. We believe that pursuing research in diverse areas allows us to balance the risks inherent in drug development and may provide drug candidates that will form our pipeline in future years.

CYSTIC FIBROSIS

Background

CF is a rare, life-threatening genetic disease affecting approximately 75,000 people in North America, Europe and Australia. CF is caused by a defective or missing CFTR protein resulting from mutations in the CFTR gene. To develop CF, children must inherit two defective CFTR genes, which are referred to as alleles - one from each parent. There are more than 1,900 known mutations in the CFTR gene, some of which result in CF. The vast majority of patients with CF carry at least one of the two of the most prevalent mutations, the F508del mutation and the G551D mutation.

The F508del mutation results in a defect in the CFTR protein in which the CFTR protein does not reach the surface of cells in sufficient quantities. The G551D mutation results in a defect in the CFTR protein in which the defective CFTR protein reaches the surface of a cell but does not efficiently transport chloride ions across the cell membrane. The absence of working CFTR proteins results in poor flow of salt and water into and out of cells in a number of organs, including the lungs. As a result, thick, sticky mucus builds up and blocks the passages in many organs, leading to a variety of symptoms. In particular, mucus builds up and clogs the airways in the lungs, causing chronic lung infections and progressive lung damage. Ivacaftor, a CFTR potentiator, increases the open probability of the CFTR protein channels on the cell surface increasing the flow of salt and water into and out of the cell. CFTR correctors, such as lumacaftor, tezacaftor, VX-152, VX-440, VX-659 and VX-445 help CFTR proteins reach the cell surface. We believe that ENaC inhibitors, such as VX-371, may help maintain mucus hydration and accelerate pulmonary mucus clearance.

We use the brand name for our products when we refer to the product that has been approved and with respect to the indications on the approved label. Otherwise, including in discussions of our CF development programs, we refer to our compounds by their scientific (or generic) name.

ORKAMBI (lumacaftor in combination with ivacaftor)

ORKAMBI is an orally-administered combination therapy comprised of lumacaftor, a CFTR corrector, and ivacaftor, a CFTR potentiator, that is approved in the United States, European Union, Australia and Canada for the treatment of patients with CF twelve years of age and older who are homozygous for the F508del mutation in their CFTR gene. In the United States, ORKAMBI is also approved for the treatment of patients with CF six to eleven years of age who are homozygous for the F508del mutation in their CFTR gene.

In the fourth quarter of 2016, we announced the results of a Phase 3 clinical trial designed to support European approval of lumacaftor in combination with ivacaftor in patients with CF six to eleven years of age who are homozygous for the F508del mutation in their CFTR gene. The clinical trial met its primary endpoint of absolute change in lung clearance index, or LCI_2.5, through 24 weeks of treatment, demonstrating a statistically significant improvement in LCI_2.5 among patients treated with ORKAMBI compared to placebo. Based on these results, we plan to submit a Marketing Authorization Application, or MAA, line extension to the European Medicines Agency, or EMA, seeking approval of lumacaftor in combination with ivacaftor in this patient population in the European Union in the first half of 2017.

We are conducting a Phase 3 clinical trial for lumacaftor in combination with ivacaftor in patients with CF two to five years of age who are homozygous for the F508del mutation in their CFTR gene. We expect enrollment in the first part of this clinical trial to be complete in mid-2017. The first part of the two-part clinical trial is evaluating safety and pharmacokinetics to inform dose selection for the second part of the clinical trial. The primary endpoint of the second part of the clinical trial is safety and tolerability, with multiple efficacy measurements as secondary endpoints.

KALYDECO (ivacaftor)

KALYDECO (ivacaftor) is an orally-administered CFTR potentiator that is approved in the United States, European Union, Australia and Canada for the treatment of certain patients with CF who have specific mutations in their CFTR gene. In the United States, KALYDECO is approved for the treatment of patients with CF two years of age and older who have one of the following mutations in their CFTR gene: G551D, G178R, S549N, S549R, G551S, G1244E, S1251N, S1255P, G1349D and R117H. In the European Union, KALYDECO is approved for the treatment of patients with CF (i) two years of age and older who have one of the following mutations in their CFTR gene: G551D, G178R, S549N, S549R, G551S, G1244E, S1251N, S1255P and G1349D and (ii) eighteen years of age and older who have the R117H mutation in their CFTR gene.

We have initiated a Phase 3 clinical trial for ivacaftor in patients with CF less than two years of age to evaluate the effect of ivacaftor on markers of CF disease in young children. The clinical trial utilizes a weight-based dose of ivacaftor granules that can be mixed in soft foods or liquids. The clinical trial is enrolling patients with one of the ten CFTR gene mutations for which KALYDECO is currently approved.

Tezacaftor (VX-661) in Combination with Ivacaftor

Tezacaftor is an orally-administered CFTR corrector drug candidate that we are evaluating in a Phase 3 development program in combination with ivacaftor in multiple CF patient populations who have at least one copy of the F508del mutation in their CFTR gene. We expect data from this Phase 3 development program in the first half of 2017. If supported

by data from the Phase 3 development program, we plan to submit a NDA to the FDA for tezacaftor in combination with ivacaftor in the second half of 2017.

The ongoing clinical trials in this Phase 3 development program are:


•	Two copies of the F508del in their CFTR gene: We have completed enrollment in this clinical trial and expect data from this clinical trial to be available in the first half of 2017;


•	One copy of the F508del mutation in their CFTR gene and a second mutation in their CFTR gene that results in residual CFTR function: We have completed enrollment in this clinical trial and expect data from this clinical trial to be available in the first half of 2017; and


•	One copy of the F508del mutation in their CFTR gene and a second mutation in their CFTR gene that results in a gating defect in the CFTR protein: We plan to complete enrollment in this clinical trial in the first half of 2017. Data from this clinical trial are not expected to be included in the initial regulatory applications for tezacaftor in combination with ivacaftor.

In the third quarter of 2016, we completed an interim futility analysis of efficacy data from the first part of a fourth clinical trial in patients with one copy of the F508del mutation in their CFTR gene and a second mutation that results in minimal CFTR function. The analysis showed that the combination of tezacaftor and ivacaftor did not result in a pre-specified improvement in lung function in this patient group. The independent Data Safety Monitoring Board, or DSMB, recommended that we stop the clinical trial and not initiate enrollment in the second part of this clinical trial. There were no safety concerns noted in the DSMB's review of the data. We subsequently reviewed the data and concurred with the DSMB’s assessment. We have closed this clinical trial based on the recommendation of the DSMB. The planned NDA for tezacaftor in combination with ivacaftor will include safety data from this clinical trial.

In addition to evaluating the efficacy of the combination regimen, these Phase 3 clinical trials will provide safety data on the combination of tezacaftor and ivacaftor to support the planned development of a triple combination regimen that includes a next-generation corrector in combination with tezacaftor and ivacaftor.

In addition to the Phase 3 development program described above, we also are conducting a Phase 3 open-label clinical trial evaluating the safety and tolerability of tezacaftor in combination with ivacaftor in patients with CF six to eleven years of age who have either (i) two copies of the F508del mutation in their CFTR gene or (ii) one copy of the F508del mutation in their CFTR gene and a second mutation in their CFTR gene that has clinically demonstrated to be responsive to ivacaftor, including gating and residual function mutations.

Next-generation CFTR Corrector Compounds

We are developing next-generation CFTR corrector compounds that we plan to evaluate as part of triple combination treatment regimens. We have initiated Phase 2 clinical trials of:


•	VX-440 to evaluate the safety and efficacy of four-week dosing of VX-440 in combination with tezacaftor and ivacaftor in approximately 40 patients with CF who have one copy of the F508del mutation in their CFTR gene and a second mutation that results in minimal CFTR function and approximately 25 patients with CF who have two copies of the F508del mutation in their CFTR gene; and


•	VX-152 to evaluate the safety and efficacy of two-week dosing of VX-152 in combination with tezacaftor and ivacaftor in approximately 35 patients with CF who have one copy of the F508del mutation in their CFTR gene and a second mutation that results in minimal CFTR function and approximately 25 patients with CF who have two copies of the F508del mutation in their CFTR gene.

Data from these clinical trials are expected in the second half of 2017 and if successful, are intended to support the potential initiation of Phase 3 development of VX-440 and a longer-duration Phase 2b or registrational program for VX-152.

We have initiated a Phase 1 clinical trial of VX-659, an additional next-generation corrector, to evaluate single ascending doses, multiple ascending doses and triple combination dosing in healthy volunteers and will include an arm to evaluate triple combination dosing in patients with CF who have one copy of the F508del mutation in their CFTR gene and a second mutation that results in minimal CFTR function. This clinical trial is enrolling healthy volunteers, and we expect to begin

enrolling CF patients in this clinical trial in the first half of 2017. Dosing of a fourth next generation corrector, VX-445, began in the first quarter of 2017. Pending data from these Phase 1 clinical trials, we plan to begin Phase 2 development for one or both of these additional next-generation correctors in the second half of 2017.

ENaC Inhibition

In 2015, we entered into a collaboration with Parion to develop investigational ENaC inhibitors, including VX-371, for the potential treatment of CF and other pulmonary diseases. Preclinical evaluation in human bronchial epithelial, or HBE, cells from patients with CF who have two copies of the F508del mutation in their CFTR gene showed that the addition of VX-371 to lumacaftor in combination with ivacaftor resulted in an additional increase in both airway surface liquid and cilia beat frequency compared to baseline and to the use of VX-371 or lumacaftor in combination with ivacaftor alone. Improvements in airway surface liquid height and cilia beat frequency are believed to be measures of increased hydration of the cell surface.

In the second quarter of 2016, Parion completed a Phase 2 clinical trial in 142 patients with CF with no restriction on the mutations in their CFTR gene. The primary endpoint of the clinical trial was safety as compared to patients on placebo. Secondary endpoints evaluated the effect on mean absolute forced expiratory volume in one second, or FEV₁ and patient-reported respiratory symptoms as reported in the CF questionnaire-revised, or CFQ-R. The clinical trial met its primary safety endpoint and data from the clinical trial showed that VX-371 was generally well-tolerated. There were no statistically significant changes in FEV₁ or CFQ-R for patients who received VX-371.

In the first quarter of 2016, we initiated a Phase 2a clinical trial evaluating VX-371 in combination with ORKAMBI, both with and without the addition of hypertonic saline, in patients with CF twelve years of age and older who have two copies of the F508del mutation in their CFTR gene. The primary endpoints of this clinical trial are safety and mean absolute change from baseline in FEV₁ at day 28 as compared to patients on placebo. We expect data from this clinical trial to be available in the second half of 2017.

RESEARCH AND DEVELOPMENT PROGRAMS

Our approach to project selection and drug design aims to enhance our ability to discover and develop drug candidates by combining transformative insights into the causes of serious diseases with innovative approaches to therapeutics. Historically, our approach to drug discovery has focused on the research and development of small molecule drugs, which has been validated through our success in moving novel small molecule drug candidates into clinical trials and obtaining marketing approvals for ORKAMBI, KALYDECO and INCIVEK (telapravir). Recently, we have expanded our research capabilities to include additional innovative therapeutic approaches with a focus on nucleic acid-based therapies. We believe that attempting to identify multiple approaches to the treatment of diseases enhances our potential to develop treatment options that, either as monotherapies or combination therapies, are transformational in nature.

We focus our research activities on developing products that would be prescribed by specialist physicians for the treatment of rare or life-threatening diseases. We begin by applying our knowledge of human genetics and human biology and focus on validated targets that have shown a causal relationship with respect to serious diseases. We generate biological assays to query the underlying biology of disease and utilize clinical biomarkers as tools to predict clinical response. We leverage our expertise in assay automation, medicinal and process chemistry, modeling and informatics, drug metabolism and pharmacokinetics, toxicology, material sciences and formulation to develop, select and advance drug candidates that have the potential to offer transformative benefits and have an efficient path to approval. Our current research programs include programs targeting cystic fibrosis, pain, adrenoleukodystrophy, alpha-1 antritrypsin deficiency, sickle cell disease and polycystic kidney disease.

To augment our internal research programs, we seek to collaborate with biopharmaceutical and technology companies, leading academic research institutions, government laboratories, foundations and other organizations as needed to advance research in our areas of therapeutic interest as well as to access technologies needed to execute on our strategy. We have established such relationships with organizations around the world and intend to extend and leverage that experience to further our research efforts to discover transformational medicines for serious diseases.

In addition to our continuing research efforts in CF, our research and mid- and early-stage development programs currently include VX-371 for the treatment of primary ciliary dyskinesia, VX-150 for the treatment of pain and VX-210 for the treatment of acute cervical spinal cord injury. We are also collaborating with CRISPR Therapeutics AG, or CRISPR, on

the discovery and development of potential new treatments aimed at the underlying genetic causes of human diseases using CRISPR-Cas9 gene editing technology and Moderna Therapeutics, Inc., or Moderna, to identify and develop messenger ribonucleic acid, or mRNA, therapeutics for the treatment of CF.

COMMERCIAL ORGANIZATION

Our commercial organization focuses on supporting sales of ORKAMBI and KALYDECO in the markets where such products are approved. Our sales and marketing organizations are responsible for promoting products to health care providers and obtaining reimbursement for products from third-party payors, including governmental organizations in the United States and non-U.S. markets.

Our U.S. field-based CF commercial team is comprised of a small number of individuals whom we believe will be sufficient to support future needs. We focus our CF marketing efforts in the United States on a relatively small number of physicians and health care professionals who write most of the prescriptions for CF medicines. Many of these physicians and health care professionals are located at a limited number of accredited centers in the United States focused on the treatment of CF. In international markets, we have a small sales force that promotes KALYDECO and ORKAMBI in jurisdictions where these products are approved.

We market our products through personal interactions with individual physicians, advertising, sending direct mail, public relations activities and other activities. In addition, our government affairs and public policy group advocates for policies that promote life sciences innovation and increase awareness of the diseases on which we are focusing, with state and federal legislatures, government agencies, public health officials and other policy-makers. We also have established programs in the United States that provide our products to qualified uninsured or underinsured patients at no charge or at a reduced charge, based on specific eligibility criteria.

COLLABORATIONS

We have entered into collaborations with pharmaceutical and other companies and organizations that provide us financial and other resources, including capabilities in research, development, manufacturing and sales and marketing, and licenses to intellectual property. These collaborations have provided us with drug candidates and/or important financial and non-financial resources that have contributed to our products and a number of the drug candidates in our current development pipeline. We may seek to license or acquire drugs, drug candidates and other technologies that have the potential to add to our pipeline or to provide us with new commercial opportunities. In particular, we are focusing on drug candidates for the treatment of patients with CF and other third-party drug candidates that could be developed for specialty markets. Furthermore, we may seek collaborators to support, develop and/or commercialize some of our current drug candidates and/or additional drug candidates that may emerge from our research activities.

Cystic Fibrosis Foundation Therapeutics Incorporated

We began working with the Cystic Fibrosis Therapeutics Incorporated, or CFFT, in 1998. We entered into a collaboration agreement with CFFT in 2004 and have amended it several times to support research and development activities. Pursuant to the collaboration agreement, as amended, we have agreed to pay tiered royalties ranging from single digits to sub-teens on any approved drugs first synthesized and/or tested during a research term on or before February 28, 2014, including KALYDECO, ORKAMBI, lumacaftor and tezacaftor and royalties ranging from low single digits to mid-single digits on potential sales of certain compounds first synthesized and/or tested between March 1, 2014 and August 31, 2016. For combination products, such as ORKAMBI, sales are allocated equally to each of the active pharmaceutical ingredients in the combination product. Pursuant to an amendment entered into in the fourth quarter of 2016, the CFFT paid us an upfront program award of $75.0 million and agreed to provide development funding to us of up to $6.0 million annually.

For ivacaftor, lumacaftor and tezacaftor, we will have royalty obligations to CFFT until the expiration of patents covering that compound. We have patents in the United States and European Union covering the composition-of-matter of ivacaftor that expire in 2027 and 2025, respectively, subject to potential patent life extensions. We have patents in the United States and European Union covering the composition-of-matter of lumacaftor that expire in 2030 and 2026, respectively, subject to potential patent life extensions. We have patents in the United States and European Union covering the composition-of-matter of tezacaftor that expire in 2027 and 2028, respectively, subject to potential patent life extensions.

Parion Sciences, Inc.

In 2015, we entered into a strategic collaboration and license agreement with Parion pursuant to which we are collaborating with Parion to develop ENaC inhibitors, including VX-371 and VX-551, for the potential treatment of CF and other pulmonary diseases.

We are leading development activities for VX-371 and are responsible for all costs, subject to certain exceptions, related to its development and commercialization. We also will lead development activities for VX-551, which is in pre-clinical development. Under the terms of the agreement, we received worldwide development and commercial rights to VX-371 and VX-551 for the potential treatment of CF and all other pulmonary diseases and have the option to select additional compounds discovered in Parion’s research program. Parion received an $80.0 million up-front payment and has the potential to receive up to an additional (i) $490.0 million in development and regulatory milestone payments for development of ENaC inhibitors in CF, including $360.0 million related to global filing and approval milestones, (ii) $370.0 million in development and regulatory milestones for VX-371 and VX-551 in non-CF pulmonary indications and (iii) $230.0 million in development and regulatory milestones if we elect to develop an additional ENaC inhibitor from Parion’s research program. Parion will receive tiered royalties on potential sales of licensed products that range from the low double digits to mid-teens as a percentage of sales. In the second quarter of 2016, we paid Parion a $5.0 million development milestone related to VX-371.

We may terminate the agreement upon 90 days’ notice to Parion prior to any licensed product receiving marketing approval or upon 180 days’ notice after a licensed product has received marketing approval. Parion may terminate the agreement upon 30 days’ notice if Vertex experiences a change of control prior to the initiation of the first Phase 3 clinical trial for a licensed product, subject to our right to receive specified royalties on any subsequent commercialization of licensed products. The agreement also may be terminated by either party for a material breach by the other, subject to notice and cure provisions. Unless earlier terminated, the agreement will continue in effect until the expiration of our royalty obligations, which expire on a country-by-country basis on the later of (i) the date the last-to-expire patent covering a licensed product expires or (ii) ten years after the first commercial sale in the country.

CRISPR Therapeutics AG

In 2015, we entered into a strategic collaboration, option and license agreement with CRISPR to collaborate on the discovery and development of potential new treatments aimed at the underlying genetic causes of human diseases using CRISPR-Cas9 gene editing technology. We have the exclusive right to license up to six CRISPR-Cas9-based targets. In connection with the CRISPR agreement, we paid CRISPR an upfront payment of $75.0 million and made a $30.0 million investment in CRISPR pursuant to a convertible loan agreement that converted into preferred stock in the first quarter of 2016. In the second quarter of 2016, we made an additional preferred stock investment in CRISPR of approximately $3.1 million. In connection with CRISPR's initial public offering in October 2016, we made an additional $10.0 million common share investment in CRISPR and our preferred stock investment in CRISPR converted into common shares.

We fund all of the discovery activities conducted pursuant to the agreement. For potential hemoglobinapathy treatments, including treatments for sickle cell disease, we share equally with CRISPR all research and development costs and worldwide revenues. For other targets that we elect to license, we would lead all development and global commercialization activities. For each of up to six targets that we elect to license, other than hemoglobinapathy targets, CRISPR has the potential to receive up to $420.0 million in development, regulatory and commercial milestones and royalties on net sales.

We may terminate the agreement upon 90 days’ notice to CRISPR prior to any product receiving marketing approval or upon 270 days’ notice after a product has received marketing approval. The agreement also may be terminated by either party for a material breach by the other, subject to notice and cure provisions. Unless earlier terminated, the agreement will continue in effect until the expiration of our payment obligations under the agreement.

Other Collaborations

Moderna Therapeutics, Inc.

In July 2016, we entered into a strategic collaboration and licensing agreement with Moderna pursuant to which the parties are seeking to identify and develop messenger ribonucleic acid, or mRNA, therapeutics for the treatment of CF. In connection with the Moderna agreement, we made an upfront payment to Moderna of $20.0 million and a $20.0 million investment in Moderna pursuant to a convertible promissory note that converted into preferred stock in August 2016.

Moderna has the potential to receive future development and regulatory milestones of up to $275.0 million, including $220.0 million in approval and reimbursement milestones, as well as tiered royalty payments on future sales.

Under the terms of the agreement, Moderna is leading discovery efforts and we are leading all preclinical, development and commercialization activities associated with the advancement of mRNA therapeutics that result from this collaboration and we will fund all expenses related to the collaboration.

We may terminate the agreement by providing advanced notice to Moderna, with the required length of notice dependent on whether any product developed under the agreement has received marketing approval. The agreement also may be terminated by either party for a material breach by the other, subject to notice and cure provisions. Unless earlier terminated, the agreement will continue in effect until the expiration of our payment obligations under the agreement.

BioAxone Biosciences, Inc.

In 2014, we entered into a license and collaboration agreement with BioAxone. Pursuant to this agreement, we are collaborating with BioAxone on the research, development and commercialization of VX-210 (formerly referred to as Cethrin), a Rho inhibitor controlled by BioAxone, for the treatment of patients who have spinal cord injuries.

We paid BioAxone initial payments of $10.0 million and BioAxone has the potential to receive up to $90.0 million in milestones and fees, including development and regulatory milestone payments and a license continuation fee. In addition, BioAxone would receive royalties and commercial milestones based on future net product sales, if any. We hold an option to purchase BioAxone at a predetermined price. The option expires on the earliest of (a) the day the FDA accepts a Biologics License Application submission for VX-210, (b) the day we elect to continue the license instead of exercising the option to purchase BioAxone and (c) March 15, 2018, subject to our option to extend this date by one year. We may terminate our agreement with BioAxone upon 90 days’ notice or immediately if we determine that a licensed product is unsafe for administration to humans. The agreement also may be terminated by either party for a material breach by the other or by BioAxone for our inactivity with respect to VX-210, in each case subject to notice and cure provisions. Unless earlier terminated, the agreement will continue until the expiration of our royalty obligations.

Outlicense Arrangements

We have entered into various agreements pursuant to which we have outlicensed rights to certain drug candidates to third-party collaborators. Pursuant to these outlicense arrangements, our collaborators become responsible for all costs related to the continued development of such drug candidates and obtain development and commercialization rights to these drug candidates. Depending on the terms of the arrangements, our collaborators may be required to make upfront payments, milestone payments upon the achievement of certain product research and development objectives and/or pay royalties on future sales, if any, of commercial products resulting from the collaboration.

Merck KGaA

On January 10, 2017, we entered into a Strategic Collaboration and License Agreement with Merck KGaA, Darmstadt, Germany, or Merck KGaA. Pursuant to the agreement, we granted Merck KGaA an exclusive worldwide license to research, develop and commercialize four oncology research and development programs. Under the agreement, we granted Merck KGaA exclusive, worldwide rights to our two clinical-stage programs targeting DNA damage repair: our ataxia telangiectasia and Rad3-related protein inhibitor, or ATR program, including VX-970 and VX-803, and our DNA-dependent protein kinase inhibitor, or DNA-PK program, including VX-984. In addition, we granted Merck KGaA exclusive, worldwide rights to two pre-clinical programs.

Under the agreement, we will receive an up-front payment of $230.0 million. In addition, we will receive tiered royalties on potential sales of licensed products, calculated as a percentage of net sales, that range from (i) mid-single digits to mid-twenties for clinical-stage programs and (ii) mid-single digits to high single digits for the pre-clinical research programs. Merck KGaA will assume full responsibility for development and commercialization costs for all programs. The licenses granted pursuant to the agreement and the up-front payment are subject to the expiration of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act.

Merck KGaA may terminate the agreement or any individual program by providing 90 days’ notice, or, in the case of termination of a program with a product that has received marketing approval, 180 days’ notice. The agreement may also be

terminated by either party for a material breach by the other party, subject to notice and cure provisions. Unless earlier terminated, the agreement will continue in effect until the date on which the royalty term and all payment obligations with respect to all products in all countries have expired.

Janssen Pharmaceuticals, Inc.

In 2014, we entered into an agreement with Janssen Pharmaceuticals, Inc., or Janssen Inc. Pursuant to this agreement, Janssen Inc. has an exclusive worldwide license to develop and commercialize certain drug candidates for the treatment of influenza, including VX-787. We received non-refundable payments of $35.0 million from Janssen Inc. in 2014 and have the potential to receive development, regulatory and commercial milestone payments as well as royalties on future product sales, if any. Janssen Inc. is responsible for costs related to the development and commercialization of the compounds. Janssen Inc. may terminate the agreement, subject to certain exceptions, upon six months’ notice.

INTELLECTUAL PROPERTY

We actively seek protection for our products and proprietary information by means of U.S. and foreign patents, trademarks and copyrights, as appropriate. In addition, we rely upon trade secret protection and contractual arrangements to protect certain of our proprietary information and products. We have patents and pending patent applications that relate to potential drug targets, compounds we are developing to modulate those targets, methods of making or using those compounds and proprietary elements of our drug discovery platform.

Much of our technology and many of our processes depend upon the knowledge, experience and skills of key scientific and technical personnel. To protect our rights to our proprietary know-how and technology, we require all employees, as well as our consultants and advisors when feasible, to enter into confidentiality agreements that require disclosure and assignment to us of ideas, developments, discoveries and inventions made by these employees, consultants and advisors in the course of their service to us.

While we have numerous issued patents and pending patent applications in our patent portfolio, we believe that the patents and patent applications in the United States and the European Union that are the most important to our business are those that claim the composition-of-matter of our drugs and drug candidates that have progressed at least into Phase 3 clinical trials. The following table sets forth the status of such primary patents and patent applications in the United States and the European Union covering the composition-of-matter of these drugs and drug candidates:



Drug/Drug Candidate	Status of United States Patent (Anticipated Expiration, Subject to Potential Extensions)	Status of European Union Patent (Anticipated Expiration, Subject to Potential Extensions)
Ivacaftor	Granted (2027)	Granted (2025)
Lumacaftor	Granted (2030)	Granted (2026)
Tezacaftor	Granted (2027)	Granted (2028)

We hold issued patents and pending patent applications in the United States, and in foreign countries we deem appropriate, claiming intellectual property developed as part of our research and development programs. In addition to the composition-of-matter patents and patent applications listed above, we hold or have exclusive licenses to the following intellectual property:


•	U.S. and foreign patent applications covering CF potentiators, correctors and ENaC inhibitors, including ivacaftor, lumacaftor, tezacaftor, VX-371, VX-152, VX-440, VX-659 and VX-445 and many other related compounds, and the use of those potentiators, correctors and ENaC inhibitors to treat CF.


•	U.S. and foreign patents and patent applications covering VX-150 and VX-241 and the use of VX-150 and VX-241 to treat pain indications.


•	U.S. and foreign patents and patent applications covering VX-210 and the use of VX-210 to treat neurology indications.


•	U.S. and foreign patents and patent applications covering the manufacture, pharmaceutical compositions, related solid forms, formulations, dosing regimens and methods of use of these compounds, including ivacaftor and lumacaftor.

We cannot be certain, however, that issued patents will be enforceable or provide adequate protection or that pending patent applications will result in issued patents.

From time to time we enter into non-exclusive license agreements for proprietary third-party technology used in connection with our research activities. These license agreements typically provide for the payment by us of a license fee, but may also include terms providing for milestone payments or royalties for the development and/or commercialization of our drug products arising from the related research.

Ivacaftor was granted orphan drug status in the United States and the European Union. We have a U.S. patent that covers the composition-of-matter of ivacaftor that we expect will provide intellectual property protection in the United States through its expiration date in 2027. We have a European patent that covers the composition-of-matter of ivacaftor that we expect will provide intellectual property protection in the European Union through its expiration date in 2025, subject to potential extension. We are entitled to orphan drug exclusivity for ivacaftor in the United States and the European Union, which means that the FDA may not approve another application to market ivacaftor for the same indication for a period of seven years following approval, and the EMA cannot accept an MAA for a drug similar to ivacaftor for a period of ten years following approval. As a result of the orphan drug exclusivity, even if a competitor successfully challenges the ivacaftor patents, it could not obtain approval from the FDA to market ivacaftor in the United States for the treatment of patients who have one of the mutations to the CFTR gene for which KALYDECO is currently approved until 2019, or submit an MAA in the European Union for the treatment of patients who have one of the mutations to the CFTR gene for which KALYDECO is currently approved until 2022, except in very limited circumstances.

Lumacaftor was granted orphan drug designation in the United States and the European Union and the fixed dose combination of lumacaftor and ivacaftor was granted orphan drug status in the United States. We have patents in the United States and European Union that cover the composition of matter of lumacaftor that we expect will provide intellectual property protection in these jurisdictions through their expiration dates in 2030 and 2026, respectively, subject to potential extension.

Tezacaftor was granted orphan drug designation in the United States and the European Union. We have patents in the United States and European Union that cover the composition of matter of tezacaftor that we expect will provide intellectual property protection in these jurisdictions through their expiration dates in 2027 and 2028, respectively, subject to potential extension.

MANUFACTURING

Manufacturing Approach and Philosophy

As we market and sell our approved products and advance our drug candidates through clinical development toward commercialization, we continue to build and maintain our supply chain and quality assurance resources. We rely on internal capabilities and an international network of third parties to manufacture and distribute our products for commercial sale and post-approval clinical trials and to manufacture and distribute our drug candidates for clinical trials. Wherever possible, we seek to establish multiple suppliers for each raw material and step in the manufacturing process, however our supply chain includes a single-source manufacturer for (i) one step in the ivacaftor manufacturing process and (ii) the manufacture of the oral granule formulation of KALYDECO that is used for patients with CF two to five years of age.

We expect that we will continue for the foreseeable future to rely on third parties to meet most of our commercial supply needs and a significant portion of our clinical supply needs. We have established our own small-scale manufacturing capabilities, which we use for clinical trial supplies and as an additional source for commercial supplies.

Our supply chain for sourcing raw materials and manufacturing drug product ready for distribution is a multi-step international endeavor. Third-party contract manufacturers, including some in China, supply us with raw materials, and convert these raw materials into drug substance, and convert the drug substance into final dosage form. Establishing and managing this global supply chain for each of our drugs and drug candidates requires a significant financial commitment and the creation and maintenance of numerous third-party contractual relationships.

We have developed systems and processes to track, monitor and oversee our third-party manufacturers’ activities, including a quality assurance program intended to ensure that our third-party manufacturers comply with current Good Manufacturing Practices, or cGMP. We regularly evaluate the performance of our third-party manufacturers with the objective of confirming their continuing capabilities to meet our needs efficiently and economically. Manufacturing facilities, both foreign and domestic, are subject to inspections by or under the authority of the FDA and other U.S. and foreign government authorities.

Manufacture of KALYDECO (ivacaftor)

We obtain ivacaftor to meet our commercial and clinical supply needs through a third-party manufacturing network. A disruption in the commercial supply of KALYDECO would have a significant effect on patients, our business and our product revenues. A disruption in the clinical supply of ivacaftor could delay the completion of clinical trials and/or affect timelines for submitting regulatory filings.

Manufacture of ORKAMBI (lumacaftor/ivacaftor)

We have developed several manufacturing processes to produce commercial quantities of ORKAMBI, including a process utilizing continuous manufacturing technology as well as a batch manufacturing process. We have established manufacturing capabilities at our third-party manufacturer in the United Kingdom that is producing commercial quantities of ORKAMBI using a batch manufacturing process we designed. We have established continuous manufacturing capabilities and completed validation for these capabilities at our facility located in Boston, Massachusetts. While continuous process manufacturing has been used in many industries, we believe that we are the first company to obtain FDA approval for a fully-continuous drug product manufacturing process.

Manufacture of Tezacaftor/Ivacaftor

We are using both a batch manufacturing process and a continuous drug product manufacturing process to obtain a supply of tezacaftor tablets being used in our Phase 3 clinical trials of tezacaftor in combination with ivacaftor. If we successfully complete development and obtain approval for tezacaftor in combination with ivacaftor, we plan to produce our commercial supply of tezacaftor using a continuous drug product manufacturing process.

COMPETITION

The pharmaceutical industry is characterized by extensive research efforts, rapid technological progress and intense competition. There are many public and private companies, including pharmaceutical companies and biotechnology companies, engaged in developing products for the indications our drugs are approved to treat and the therapeutic areas we are targeting with our research and development activities. Potential competitors also include academic institutions, government agencies, other public and private research organizations and charitable venture philanthropy organizations that conduct research, seek patent protection and/or establish collaborative arrangements for research, development, manufacturing and commercialization. Many of our competitors have substantially greater financial, technical and human resources than we do. We face competition based on the safety and efficacy of our products and drug candidates, the timing and scope of regulatory approvals, the availability and cost of supply, marketing and sales capabilities, reimbursement coverage, price, patent protection and other factors. Our competitors may develop or commercialize more effective, safer or more affordable products than we are able to develop or commercialize or obtain more effective patent protection. As a result, our competitors may commercialize products more rapidly or effectively than we do, which would adversely affect our competitive position, the likelihood that our drug candidates, if approved, would achieve and maintain market acceptance and our ability to generate meaningful revenues from our products. Future competitive products may render our products, or future products, obsolete or noncompetitive.

Cystic Fibrosis

An increasing number of companies are seeking to identify and develop drug candidates for the treatment of CF, including companies such as Concert Pharmaceuticals, Galapagos NV in collaboration with Abbvie, Genzyme, which is a division of Sanofi, Novartis, Pfizer, ProQR Therapeutics, Proteostasis Therapeutics, PTC Therapeutics and several private companies. Although we are the first company to successfully develop drugs that treat the underlying cause of CF, ORKAMBI and KALYDECO are collectively approved to treat only a portion of patients with CF. Our competitors have research and development programs directed at identifying and developing CFTR potentiators, CFTR correctors, ENaC inhibitors and drug candidates with other mechanisms of action or that utilize new therapeutic approaches that seek to address

the underlying cause of CF. Our competitors are exploring the development of drug candidates both as monotherapies and as part of combination regimens. Our success in rapidly developing and commercializing KALYDECO and ORKAMBI may increase the resources that our competitors allocate to the development of these potential treatments for CF. If one or more competing therapies are successfully developed as a treatment for patients with CF, our revenues from ORKAMBI, KALYDECO and/or our other CF drug candidates, if then approved, could face significant competitive pressure.

GOVERNMENT REGULATION

The research, development, testing, manufacture, packaging, quality control, approval, labeling, packaging, storage, safety monitoring, record keeping, promotion, advertising, distribution import, export and marketing of our products and drug candidates are subject to extensive regulation by United States and foreign governmental authorities.

United States Government Regulation

New Drug Application Approval Processes

In the United States, the FDA regulates drugs, including small molecules, under the Federal Food, Drug and Cosmetic Act, or the FDCA, and implementing regulations. The process of obtaining regulatory approvals and the subsequent compliance with applicable federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial resources. Failure to comply with the applicable U.S. requirements at any time during the drug development process, approval process or after approval, may subject us to administrative or judicial sanctions, any of which could have a material adverse effect on us. These sanctions could include:


•	refusal to approve or delay in review of pending applications;


•	withdrawal of an approval or the implementation of limitations on a previously approved indication for use;


•	imposition of a clinical hold, a risk mitigation and evaluation strategy or other safety-related limitations;


•	warning letters or “untitled letters”;


•	product seizures;


•	total or partial suspension of production or distribution; or


•	injunctions, fines, disgorgement, refusals of government contracts, or civil or criminal penalties.

The process required by the FDA before a drug may be marketed in the United States generally involves the following:


•	completion of preclinical laboratory tests, animal studies and formulation studies conducted according to Good Laboratory Practices, or GLP, and other applicable regulations;


•	submission to the FDA of an investigational new drug, or IND, application, which must become effective before clinical trials in the United States may begin;


•	performance of adequate and well-controlled clinical trials according to Good Clinical Practices, or GCP, to establish the safety and efficacy of the proposed drug for its intended use;


•	submission to the FDA of an NDA;


•	satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the product will be produced to assess compliance with cGMP to assure that the facilities, methods and controls are adequate to preserve the product’s identity, strength, quality and purity; and


•	FDA review and approval of the NDA.

Once a drug candidate is identified for development, it enters the preclinical testing stage. Preclinical tests include laboratory evaluations of product chemistry, toxicity and formulation, as well as animal pharmacology and toxicology studies. An IND sponsor must submit the results of the preclinical tests, together with manufacturing information and analytical data, to the FDA as part of the IND. Preclinical or nonclinical testing typically continues even after the IND is

submitted. In addition to including the results of the preclinical studies, the IND also will include a protocol detailing, among other things, the objectives of the initial clinical trial and the parameters to be used in monitoring safety. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA, within the 30-day time period, places the IND on clinical hold. If an IND is placed on clinical hold, the IND sponsor and the FDA must resolve any outstanding concerns before clinical trials can begin. A clinical hold may occur at any time during the life of an IND, and may affect one or more specific clinical trials or all clinical trials conducted under the IND.

All clinical trials must be conducted under the supervision of one or more qualified investigators in accordance with GCP. They must be conducted under protocols detailing the objectives of the trial, dosing procedures, subject selection and exclusion criteria and the safety and effectiveness criteria to be evaluated. Each protocol and any amendments must be submitted to the FDA as part of the IND, and progress reports detailing the results of the clinical trials must be submitted at least annually to the FDA and more frequently in other situations, including the occurrence of serious adverse events. An institutional review board, or IRB, at each institution participating in the clinical trial must review and approve the protocol and any amendments before a clinical trial commences or continues at that institution, approve the information regarding the clinical trial and the consent form that must be provided to each trial subject or his or her legal representative, and monitor the clinical trial until completed and otherwise comply with IRB regulations. Information about certain clinical trials must be submitted within specific timeframes to the National Institutes of Health for public dissemination on the www.clinicaltrials.gov website.

Clinical trials typically are conducted in three sequential phases that may overlap or be combined:

•

Phase 1. The drug initially is introduced into healthy human subjects and tested for safety, dosage tolerance, absorption, metabolism, distribution and elimination. In the case of some drug candidates for severe or life-threatening diseases, such as cancer, especially when the drug candidate may be inherently too toxic to ethically administer to healthy volunteers, the initial human testing is often conducted in patients.


•	Phase 2. Clinical trials are initiated in a limited patient population intended to identify possible adverse effects and safety risks, to preliminarily evaluate the efficacy of the drug candidate for specific targeted diseases and to determine dosage tolerance and optimal dosage.


•	Phase 3. Clinical trials are undertaken to further evaluate dosage, clinical efficacy and safety in an expanded patient population at geographically dispersed clinical trial sites. These clinical trials are intended to establish the overall risk-benefit ratio of the drug candidate and provide an adequate basis for regulatory approval and product labeling.

Phase 1, Phase 2 and Phase 3 testing may not be completed successfully within any specified period, if at all. The FDA or the sponsor may suspend a clinical trial at any time for a variety of reasons, including a finding that the healthy volunteers or patients are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s requirements or if the drug candidate has been associated with unexpected serious harm to healthy volunteers or patients.

We estimate that it generally takes 10 to 15 years, or possibly longer, to discover, develop and bring to market a new pharmaceutical product in the United States, as outlined below:



Phase		Estimated Duration
Discovery		2 to 4 years
Preclinical		1 to 2 years
Phase 1		1 to 2 years
Phase 2		2 to 4 years
Phase 3		2 to 4 years
FDA approval		8 months to 2 years

During the development of a new drug, sponsors are given opportunities to meet with the FDA at certain points. These points may be prior to submission of an IND, at the end of Phase 2 testing, and before an NDA is submitted. Meetings at other times may be requested. These meetings can provide an opportunity for the sponsor to share information about the data gathered to date, for the FDA to provide advice, and for the sponsor and FDA to reach agreement on the next phase of development. Sponsors typically use the end of Phase 2 meeting to discuss their Phase 2 clinical results and present their plans for the pivotal Phase 3 clinical trial that they believe will support approval of the drug candidate.

As part of the development process, companies usually complete animal safety studies and develop additional information about the chemistry and physical characteristics of the drug and finalize a process for manufacturing the product in accordance with cGMP requirements. The manufacturing process must be capable of consistently producing quality batches of the drug candidate, and the manufacturer must develop methods for testing the quality, purity and potency of the final products. Additionally, appropriate packaging must be selected and tested and stability studies must be conducted to demonstrate that the drug candidate does not undergo unacceptable deterioration over its shelf-life.

The results of drug development, preclinical studies and clinical trials, along with descriptions of the manufacturing process, analytical tests conducted on the chemistry of the drug candidate, proposed labeling and other relevant information are submitted to the FDA as part of an NDA requesting approval to market the drug candidate. The FDA reviews each NDA submitted to ensure that it is sufficiently complete for substantive review before it accepts it for filing. It may request additional information rather than accept an NDA for filing. The FDA has approximately two months to make a decision on whether to accept an NDA for filing.

Once the submission is accepted for filing, the FDA begins an in-depth review. The FDA may not approve an NDA if the applicable regulatory criteria are not satisfied or may require additional clinical or other data. Even if such data are submitted, the FDA may ultimately decide that the NDA does not satisfy the criteria for approval. The FDA reviews an NDA to determine, among other things, whether a drug candidate is safe and effective for its intended use and whether its manufacturing is cGMP-compliant to assure and preserve the drug candidate’s identity, strength, quality and purity. The FDA may refer the NDA to an advisory committee for review and recommendation as to whether the NDA should be approved and under what conditions. The FDA is not bound by the recommendation of an advisory committee, but it generally follows such recommendations. Before approving an NDA, the FDA will inspect the facility or facilities where the drug candidate is manufactured and tested. Additionally, before approving an NDA, the FDA may inspect one or more clinical trial sites to assure compliance with GCP requirements.

The FDA may require, as a condition of approval, restricted distribution and use, enhanced labeling, special packaging or labeling, expedited reporting of certain adverse events, pre-approval of promotional materials, restrictions on direct-to-consumer advertising or commitments to conduct additional research post-approval. The FDA will issue a complete response letter if the agency decides not to approve the NDA in its present form. The complete response letter usually describes all of the specific deficiencies in the NDA identified by the FDA. If a complete response letter is issued, the applicant may either resubmit the NDA, addressing all of the deficiencies identified in the letter, or withdraw the application.

Biologics License Application Process

Certain of our drug candidates may be regulated by the FDA under the FDCA and the Public Health Service Act as biologics. Biologics can present special safety, efficacy and manufacturing challenges that may differ from those present in the regulation of small molecule drugs. As such, while similar to the NDA review process described above, in lieu of filing an NDA, biologics require the submission of a Biologics License Application, or BLA, and approval of such BLA by the FDA prior to being marketed in the U.S.

Expedited Review and Approval

The FDA has various programs, including Fast Track, priority review, and accelerated approval, that are intended to expedite or simplify the process for reviewing drug candidates, and/or provide for approval on the basis of surrogate endpoints. Even if a drug candidate qualifies for one or more of these programs, the FDA may later decide that the drug candidate no longer meets the conditions for qualification or that the time period for FDA review or approval will not be shortened. Generally, drug candidates that may be eligible for these programs are those for serious or life-threatening conditions, those with the potential to address unmet medical needs, and those that offer meaningful benefits over existing treatments. For example, Fast Track is a process designed to facilitate the development, and expedite the review of drug candidates to treat serious diseases and fill an unmet medical need. Priority review is designed to give drug candidates that offer significant improvements in safety or effectiveness or provide a treatment where no adequate therapy exists an initial review within six months after acceptance for filing, as compared to a standard review time of ten months after acceptance for filing. Although Fast Track and priority review do not affect the standards for approval, the FDA will attempt to facilitate early and frequent meetings with a sponsor of a Fast Track designated drug candidate and expedite review of the application for a drug candidate designated for priority review. Accelerated approval provides an earlier approval of drugs that treat serious diseases, and that fill an unmet medical need based on a surrogate endpoint, which is a laboratory measurement or

physical sign that the FDA determines is reasonably likely to predict a clinical benefit. As a condition of approval, the FDA may require that a sponsor of a product receiving accelerated approval perform post-marketing confirmatory clinical trials.

In July 2012, the Food and Drug Administration Safety and Innovation Act, or FDASIA, was enacted, amending the FDCA. As part of FDASIA, Congress created a drug designation called “Breakthrough Therapy.” This designation is intended to facilitate expedited development and review of a compound which, alone or in combination with one or more other compounds, is intended to treat a serious or life-threatening disease or condition and for which preliminary clinical evidence indicates that the compound may demonstrate substantial clinical improvement over existing therapies. Breakthrough Therapy designation may be requested at the filing of, or as an amendment to, an IND based on criteria established by the FDA.

Actions identified in FDASIA that may expedite the development and review of a Breakthrough Therapy include, as appropriate: holding meetings with the sponsor and the review team throughout the development of the drug; involving senior managers and experienced review staff, as appropriate, in a collaborative, cross-disciplinary review; and assigning a cross-disciplinary project lead for the FDA review team to facilitate efficient review of the development program and serve as a scientific liaison between the review team and the sponsor.

Post-approval Requirements

Once an approval is granted, the FDA may withdraw the approval if compliance with regulatory standards is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown problems with a product may result in restrictions on the product or complete withdrawal of the product from the market. In addition, under the FDCA the sponsor of an approved drug in the United States may not promote that drug for unapproved, or off-label, uses, although a physician may prescribe a drug for an off-label use in accordance with the practice of medicine. After approval, some types of changes to the approved product, such as adding new indications, manufacturing changes and additional labeling claims, are subject to further FDA review and approval. In addition, the FDA may require testing and surveillance programs to monitor the effect of approved products that have been commercialized, and the FDA has the power to prevent or limit further marketing of a product based on the results of these post-marketing programs.

Products manufactured or distributed by us pursuant to FDA approvals are subject to continuing regulation by the FDA, including, among other things:


•	record-keeping requirements;


•	reporting of adverse experiences with the product;


•	providing the FDA with updated safety and efficacy information;


•	drug sampling and distribution requirements;


•	notifying the FDA and gaining its approval of specified manufacturing or labeling changes;


•	complying with certain electronic records and signature requirements; and


•	complying with FDA promotion and advertising requirements.

Drug manufacturers and other entities involved in the manufacture and distribution of approved products are required to register with the FDA and certain state agencies, and are subject to periodic unannounced inspections by the FDA and some state agencies for compliance with cGMP and other laws.

We rely, and expect to continue to rely, on third parties for the production of our products. Future FDA and state inspections may identify compliance issues at the facilities of our contract manufacturers that may disrupt manufacture or distribution of our products, or require substantial resources to correct.

From time to time, new legislation is enacted that changes the statutory provisions governing the approval, manufacturing and marketing of products regulated by the FDA. In addition, FDA regulations and guidance often are revised or reinterpreted by the agency in ways that may significantly affect our business and our products. It is impossible to predict whether legislative changes will be enacted, or FDA regulations, guidance or interpretations changed.

Patent Term Restoration and Data Exclusivity

Depending upon the timing, duration and specifics of FDA approval of the use of our drugs, some of our United States patents may be eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, referred to as the Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit a patent restoration term of up to five years as compensation for patent term lost during product development and the FDA regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the product’s approval date. The patent term restoration period is generally one-half the time between the later of the effective date of an IND or the issuance date of the patent, and the submission date of an NDA, plus the time between the submission date of an NDA and the approval of that application. Only one patent applicable to an approved product is eligible for the extension and the extension must be applied for prior to expiration of the patent. The United States Patent and Trademark Office, in consultation with the FDA, reviews and approves the application for any patent term extension or restoration. In the future, we may apply for restorations of patent term for some of our currently owned or licensed patents to add patent life beyond their current expiration date, depending on the expected length of clinical trials and other factors involved in the submission of the relevant NDA.

Data exclusivity provisions under the FDCA also can delay the submission or the approval of certain applications. The FDCA provides a five-year period of non-patent data exclusivity within the United States to the first applicant to gain approval of an NDA for a new chemical entity. A product is a new chemical entity if the FDA has not previously approved any other new product containing the same active moiety, which is the molecule responsible for the action of the drug substance. During the data exclusivity period for a new chemical entity, the FDA may not accept for review an abbreviated new drug application, or ANDA, or a 505(b)(2) NDA submitted by another company for another version of such product where the applicant does not own or have a legal right of reference to all the data required for approval. However, an application may be submitted after four years if it contains a certification of patent invalidity or non-infringement. The FDCA also provides three years of data exclusivity for an NDA, 505(b)(2) NDA or supplement to an existing NDA if new clinical investigations, other than bioavailability studies, that were conducted or sponsored by the applicant are deemed by the FDA to be essential to the approval of the application, for example, for new indications, dosages, or strengths of an existing drug. This three-year exclusivity covers only the conditions associated with the new clinical investigations and does not prohibit the FDA from approving ANDAs for drugs containing the original active agent.

Pediatric Exclusivity

Section 505A of the FDCA, as amended by the FDA Amendments Act of 2007, provides for pediatric exclusivity which, if granted, provides for the attachment of an additional six months to the term of any existing regulatory exclusivity, including non-patent and orphan exclusivity. If the sponsor submits information requested in writing by the FDA, in the form of a written request, relating to the use of the drug in children and such information is accepted by FDA within the statutory time limits, whatever regulatory periods of exclusivity or patent protection covering the product are extended by six months. The FDA may not issue a written request for clinical trials on unapproved or approved indications or where it determines that information relating to the use of a drug in a pediatric population, or part of the pediatric population, may not produce health benefits in that population.

Exclusivity of Biologics

Biologics are entitled to exclusivity under the Biologics Price Competition and Innovation Act, which was passed as Title VII to the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation Act of 2010, which we refer to as the ACA. The law provides a pathway for approval of biosimilars following the expiration of 12 years of exclusivity for the innovator biologic plus any extension term for pediatrics as discussed above. Historically, a biologic approved under a BLA was not subject to the generic drug review and approval provisions of the FDCA. However, the ACA created a regulatory pathway for the abbreviated approval for biological products that are demonstrated to be “biosimilar” or “interchangeable” with an FDA-approved biological product. In order to meet the standard of interchangeability, a sponsor must demonstrate that the biosimilar product can be expected to produce the same clinical result as the reference product, and for a product that is administered more than once, that the risk of switching between the reference product and biosimilar product is not greater than the risk of maintaining the patient on the reference product. Such biosimilars would reference biological products approved in the United States. The law establishes a period of 12 years of data exclusivity for reference products, which protects the data in the original BLA by prohibiting sponsors of biosimilars from gaining FDA approval based in part on reference to data in the original BLA.

Foreign Regulation

In addition to regulations in the United States, we are subject to a variety of foreign regulations governing clinical trials and commercial sales and distribution of our products. Whether or not we obtain FDA approval for a drug candidate, we must obtain approval by the comparable regulatory authorities of foreign countries or economic areas, such as the European Union, before we can commence clinical trials or market products in those countries or areas. The approval process and requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary greatly from place to place, and the time may be longer or shorter than that required for FDA approval.

Under European Union regulatory systems, a company may submit marketing authorization applications either under a centralized or decentralized procedure. The centralized procedure, which is compulsory for medicines produced by biotechnology or those medicines intended to treat AIDS, cancer, neurodegenerative disorders, or diabetes and optional for those medicines that are highly innovative, provides for the grant of a single marketing authorization that is valid for all European Union member states. The decentralized procedure provides for approval by one or more “concerned” member states based on an assessment of an application performed by one member state, known as the “reference” member state. Under the decentralized approval procedure, an applicant submits an application, or dossier, and related materials to the reference member state and concerned member states. The reference member state prepares a draft assessment and drafts of the related materials within 120 days after receipt of a valid application. Within 90 days of receiving the reference member state’s assessment report, each concerned member state must decide whether or not to approve the assessment report and related materials. If a member state does not recognize the marketing authorization, the disputed points are eventually referred to the European Commission, whose decision is binding on all member states.

Orphan Drug Designation

Under the Orphan Drug Act, the FDA may grant orphan drug designation to drug candidates intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 people in the United States, or more than 200,000 people in the United States and for which there is no reasonable expectation that the cost of developing and making available in the United States a drug for this type of disease or condition will be recovered from sales in the United States for that drug. Orphan drug designation must be requested before submitting an NDA or BLA. After the FDA grants orphan drug designation, the identity of the therapeutic agent and its potential orphan use are disclosed publicly by the FDA. Orphan drug designation does not convey any advantage in or shorten the duration of the regulatory review and approval process. KALYDECO, ORKAMBI and tezacaftor have been granted designation as orphan drugs by the FDA.

If a drug candidate that has orphan drug designation subsequently receives the first FDA approval for that drug for the disease for which it has such designation, the product is entitled to orphan drug exclusivity, which means that the FDA may not approve any other applications to market the same drug for the same indication, except in very limited circumstances, for seven years. Orphan drug exclusivity, however, also could block the approval of our drug candidates for seven years if a competitor first obtains approval of the same product as defined by the FDA or if our drug candidate is determined to be contained within the competitor’s product for the same indication or disease.

As in the United States, we may apply for designation of a drug candidate as an orphan drug for the treatment of a specific indication in the European Union before the application for marketing authorization is made. Orphan drugs in Europe enjoy economic and marketing benefits, including up to 10 years of market exclusivity for the approved indication unless another applicant can show that its product is safer, more effective or otherwise clinically superior to the orphan-designated product.

The FDA and foreign regulators expect holders of exclusivity for orphan drugs, such as KALYDECO and ORKAMBI, to ensure the availability of sufficient quantities of their orphan drugs to meet the needs of patients. Failure to do so could result in the withdrawal of marketing exclusivity for the orphan drug.

Reimbursement

Sales of our products depend, to a large degree, on the extent to which our products will be covered by third-party payors, such as government health programs, commercial insurance and managed health care organizations. These third-party payors increasingly are reducing reimbursements for medical products and services. Additionally, the containment of health care costs has become a priority of federal and state governments, and the prices of drugs have been a focus in this effort. The U.S. government, state legislatures and foreign governments have shown significant interest in implementing cost-containment programs, including price controls, restrictions on reimbursement and requirements for substitution of

generic products. Adoption of price controls and cost-containment measures, and adoption of more restrictive policies in jurisdictions with existing controls and measures, could limit our revenues. Decreases in third-party reimbursement for a product or a decision by a third-party payor to not cover a product could reduce physician usage of the product.

The Medicare Prescription Drug, Improvement, and Modernization Act of 2003, or the MMA, established the Medicare Part D program to provide a voluntary prescription drug benefit to Medicare beneficiaries. Under Part D, Medicare beneficiaries may enroll in prescription drug plans offered by private entities, which will provide coverage of outpatient prescription drugs. Unlike Medicare Part A and B, Part D coverage is not standardized. Part D prescription drug plan sponsors are not required to pay for all covered Part D drugs, and each drug plan can develop its own drug formulary that identifies which drugs it will cover and at what tier or level. However, Part D prescription drug formularies must include drugs within each therapeutic category and class of covered Part D drugs, though not necessarily all the drugs in each category or class. Any formulary used by a Part D prescription drug plan must be developed and reviewed by a pharmacy and therapeutic committee. Government payment for some of the costs of prescription drugs may increase demand for products for which we receive marketing approval. However, any negotiated prices for our products covered by a Part D prescription drug plan likely will be lower than the prices we might otherwise obtain. Moreover, while the MMA applies only to drug benefits for Medicare beneficiaries, private payors often follow Medicare coverage policy and payment limitations in setting their own payment rates. Any reduction in payment that results from the MMA may result in a similar reduction in payments from non-governmental payors.

The American Recovery and Reinvestment Act of 2009 provides funding for the federal government to compare the effectiveness of different treatments for the same illness. A plan for the research will be developed by the Department of Health and Human Services, or HHS, the Agency for Healthcare Research and Quality and the National Institutes of Health, and periodic reports on the status of the research and related expenditures will be made to the U.S. Congress. Although the results of the comparative effectiveness studies are not intended to mandate coverage policies for public or private payors, it is not clear what effect, if any, the research will have on the sales of our products. It is possible that comparative effectiveness research demonstrating benefits of a competitor’s product could adversely affect the sales of our products. If third-party payors do not consider our products to be cost-effective compared to other available therapies, they may not cover our products as a benefit under their plans or, if they do, the level of payment may not be sufficient to allow us to sell our products on a profitable basis.

The ACA was enacted in March 2010 and is designed to expand coverage for the uninsured while at the same time containing overall health care costs. With regard to pharmaceutical products, among other things, the ACA is designed to expand and increase industry rebates for drugs covered under Medicaid programs, impose an annual fee on branded pharmaceutical manufacturers and make changes to the coverage requirements under the Medicare Part D program. The branded prescription drug fee is not tax deductible. We cannot predict all of the effects of the ACA on pharmaceutical companies as many of the ACA reforms require the promulgation of detailed regulations implementing the statutory provisions, which has not yet occurred.

In Europe and many other foreign countries, the success of ORKAMBI, KALYDECO and of any other drug candidates we may develop, depends largely on obtaining and maintaining government reimbursement, because in many foreign countries patients are unable to access prescription pharmaceutical products that are not reimbursed by their governments. Negotiating reimbursement rates in foreign countries can delay the commercialization of a pharmaceutical product and generally results in a reimbursement rate that is lower than the net price that companies can obtain for the same product in the United States.

In some countries, such as Germany and France, commercial sales of a new product can occasionally begin while the reimbursement rate that a company will receive is under discussion. In other countries, a company must complete the reimbursement discussions prior to the commencement of commercial sales of the pharmaceutical product. The requirements governing drug pricing vary widely from country to country. For example, the member states of the European Union can restrict the range of drugs for which their national health insurance systems provide reimbursement and to control the prices of drugs for human use. A member state may approve a specific price for the drug or it may instead adopt a system of direct or indirect controls on the profitability of the company placing the drug on the market. Recently, many countries in the European Union have increased the amount of discounts required on pharmaceuticals and these efforts could continue as countries attempt to manage healthcare expenditures, especially in light of the severe fiscal and debt crises experienced by many countries in the European Union. There can be no assurance that any country that has price controls or reimbursement limitations for pharmaceutical products will provide for reimbursement of our products, or such countries may only provide

for reimbursement on terms that we do not deem adequate. Additionally, reimbursement discussions in ex-U.S. markets may take a significant period of time.

Other United States Regulations

Pharmaceutical companies also are subject to various federal and state laws pertaining to health care “fraud and abuse,” including anti-kickback laws and false claims laws, and the reporting of payments to physicians and teaching hospitals.

Anti-kickback Laws

U.S. federal laws prohibit fraud and abuse involving state and federal health care programs, such as Medicare and Medicaid. These laws are interpreted broadly and enforced aggressively by various state and federal agencies, including the Centers for Medicare & Medicaid Services, or CMS, the Department of Justice, the Office of Inspector General for HHS and various state agencies. These anti-kickback laws prohibit, among other things, knowingly and willfully offering, paying, soliciting, receiving or providing remuneration, directly or indirectly, in exchange for or to induce either the referral of an individual, or the furnishing, arranging for or recommending of an item or service that is reimbursable, in whole or in part, by a federal health care program. Remuneration is broadly defined to include anything of value, such as, cash payments, gifts or gift certificates, discounts, or the furnishing of services, supplies or equipment. The anti-kickback laws are broad and prohibit many arrangements and practices that are lawful in businesses outside of the health care industry.

The penalties for violating the anti-kickback laws can be severe. The sanctions include criminal and civil penalties, and possible exclusion from the federal health care programs. Many states have adopted laws similar to the federal anti-kickback laws, and some apply to items and services reimbursable by any payor, including third-party payors.

State and Federal Prohibitions on False Claims

The federal False Claims Act imposes liability on any person or entity that, among other things, knowingly presents, or causes to be presented, a false or fraudulent claim for payment to the federal government. Under the False Claims Act, a person acts knowingly if he has actual knowledge of the information or acts in deliberate ignorance or in reckless disregard of the truth or falsity of the information. Specific intent to defraud is not required. Provisions of the False Claims Act allow a private individual to bring an action on behalf of the federal government and to share in any amounts paid by the defendant to the government in connection with the action. The number of filings under these provisions has increased significantly in recent years. When an entity is determined to have violated the False Claims Act, it may be required to pay up to three times the actual damages sustained by the government, plus civil penalties for each false claim. Conduct that violates the False Claims Act may also lead to exclusion from the federal health care programs. Given the number of claims likely to be at issue, potential damages under the False Claims Act for even a single inappropriate arrangement could be significant. In addition, various states have enacted similar laws modeled after the False Claims Act that apply to items and services reimbursed under Medicaid and other state health care programs, and, in several states, such laws apply to claims submitted to all payors.

Federal Prohibitions on Health Care Fraud and False Statements Related to Health Care Matters

Under the administrative simplification provisions of the Health Insurance Portability and Accountability Act of 1996, or HIPAA, and state laws there are numerous regulations for protecting the privacy and security of protected health information. Additional administrative simplification provisions created the following federal crimes: health care fraud, false statements relating to health care matters, theft or embezzlement in connection with a health benefit program and obstruction of criminal investigation of health care offenses. The health care fraud statute prohibits knowingly and willfully executing a scheme to defraud any health care benefit program, including a private insurer. The false statements statute prohibits knowingly and willfully falsifying, concealing, or covering up a material fact or making any materially false, fictitious, or fraudulent statement in connection with the delivery of or payment for health care benefits, items, or services. The theft or embezzlement statute prohibits knowingly and willfully embezzling, stealing or otherwise converting or misapplying the money or property of a health care benefit program. The obstruction of criminal investigations of health care offenses statute prohibits willfully preventing, obstructing, misleading or delaying the communication of information and records relating to a violation of a federal health care offense to a criminal investigator. A violation of any of these laws is a felony and may result in fines, or exclusion from the federal health care programs.

US Open Payments (formerly Physician Payment Sunshine Act)

Open Payments (commonly known as the Sunshine Act) is a federal program, required by the ACA, that requires pharmaceutical manufacturers to report annually to the Centers for Medicare and Medicaid Services payments or other transfers of value made by that entity to physicians and teaching hospitals. In February 2013, regulations were released that contain detailed guidance regarding the information that must be collected and reported. We were required to collect information regarding such payments starting in August 2013 and were required to begin reporting such information in March 2014. Over the next several years, we will need to continue to dedicate significant resources to enhance our systems and processes in order to comply with these regulations. Failure to comply with the reporting requirements could result in significant civil monetary penalties. Similar laws have been enacted or are under consideration in foreign jurisdictions, including France which has adopted the Loi Bertrand, or French Sunshine Act, which became effective in 2013.

The Foreign Corrupt Practices Act

The Foreign Corrupt Practices Act prohibits U.S. companies and their representatives from offering, promising, authorizing or making payments to foreign officials for the purpose of obtaining or retaining business abroad. In many countries, the health care professionals we regularly interact with may meet the definition of a foreign government official for purposes of the Foreign Corrupt Practices Act.

Other Regulations

In addition to the statutes and regulations described above, we also are subject to regulation in the United States under the Occupational Safety and Health Act, the Environmental Protection Act, the Toxic Substances Control Act, the Resource Conservation and Recovery Act and other federal, state, local and foreign statutes and regulations, now or hereafter in effect.

EMPLOYEES

As of December 31, 2016, we had approximately 2,150 employees, as compared to approximately 1,950 employees as of December 31, 2015. Of these employees, approximately 1,725 were based in the United States, approximately 350 were based in Europe and approximately 75 were based in Canada. In February 2017, we decided to consolidate our research activities into our Boston, Milton Park and San Diego locations and are in the process of closing our research site in Canada. Our scientific staff members have diversified experience and expertise in molecular and cell biology, genetics, biochemistry, synthetic organic chemistry, protein X-ray crystallography, protein nuclear magnetic resonance spectroscopy, microbiology, computational chemistry and computational biology, biophysical chemistry, medicinal chemistry, clinical pharmacology and clinical medicine. Our clinical development personnel have extensive expertise in designing and executing clinical trials. Employees in our commercial organization have extensive experience in selling and marketing pharmaceutical products as well as seeking reimbursement from government and third-party payors for pharmaceutical products. Our employees are not covered by a collective bargaining agreement, except for a small number of employees outside the U.S. Science magazine named Vertex as one of its top employers in the life sciences in each of the last five years. We consider our relations with our employees to be good.

OTHER MATTERS

Financial Information and Significant Customers

Financial information about (i) our net product revenues and other revenues generated in the principal geographic regions in which we operate and our significant customers is set forth in Note T, “Segment Information,” to our consolidated financial statements included in this Annual Report on Form 10-K, (ii) net income (loss) per share attributable to Vertex common shareholders and our total assets are provided in our consolidated financial statements included in this Annual Report on Form 10-K and (iii) our research and development expenses in each of the last three fiscal years and our deconsolidation of Alios as of December 31, 2014 is provided in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” A discussion of the risks attendant to our international operations is set forth in the “Risk Factors” section of this Annual Report on Form 10-K.

Information Available on the Internet

Our internet address is www.vrtx.com. Our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, and all amendments to those reports, are available to you free of charge through the “Investors-SEC

Filings” section of our website as soon as reasonably practicable after those materials have been electronically filed with, or furnished to, the Securities and Exchange Commission.

Corporate Information

Vertex was incorporated in Massachusetts in 1989, and our principal executive offices are located at 50 Northern Avenue Boston, Massachusetts 02210.

DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

The names, ages and positions held by our executive officers and directors are as follows:



Name	Age	Position
Jeffrey M. Leiden, M.D., Ph.D.	61	Chairman of the Board, Chief Executive Officer and President
David Altshuler, M.D., Ph.D.	52	Executive Vice President, Global Research and Chief Scientific Officer
Stuart A. Arbuckle	51	Executive Vice President and Chief Commercial Officer
Jeffrey A. Chodakewitz, M.D.	61	Executive Vice President, Global Medicines Development and Medical Affairs, and Chief Medical Officer
Michael Parini, J.D.	42	Executive Vice President and Chief Legal and Administrative Officer
Amit K. Sachdev, J.D.	49	Executive Vice President, Chief Regulatory Officer and Chief of Staff to the CEO
Ian F. Smith	51	Executive Vice President, Chief Operating Officer and Chief Financial Officer
Paul M. Silva	51	Senior Vice President and Corporate Controller
Sangeeta M. Bhatia, M.D., Ph.D.	48	Director
Joshua S. Boger, Ph.D.	65	Director
Terrence C. Kearney	62	Director
Yuchun Lee	51	Director
Margaret G. McGlynn	57	Director
Bruce I. Sachs	57	Director
Elaine S. Ullian	69	Director
William Young	72	Director

Dr. Leiden is our Chairman, Chief Executive Officer and President. He has held the positions of Chief Executive Officer and President since February 2012 after joining us as CEO Designee in December 2011. He has been a member of our Board of Directors since July 2009, the Chairman of our Board of Directors since May 2012, and served as our lead independent director from October 2010 through December 2011. Dr. Leiden was a Managing Director at Clarus Ventures, a life sciences venture capital firm, from 2006 through January 2012. Dr. Leiden was President and Chief Operating Officer of Abbott Laboratories, Pharmaceuticals Products Group, and a member of the Board of Directors of Abbott Laboratories from 2001 to 2006. From 1987 to 2000, Dr. Leiden held several academic appointments, including the Rawson Professor of Medicine and Pathology and Chief of Cardiology and Director of the Cardiovascular Research Institute at the University of Chicago, the Elkan R. Blout Professor of Biological Sciences at the Harvard School of Public Health, and Professor of Medicine at Harvard Medical School. He is an elected member of both the American Academy of Arts and Sciences, and the Institute of Medicine of the National Academy of Sciences. Dr. Leiden is a senior advisor to Clarus Ventures. Dr. Leiden serves as a director of Quest Diagnostics Inc., a medical diagnostics company, and Massachusetts Mutual Life Insurance Company, an insurance company. Dr. Leiden was a director and the non-executive Vice Chairman of the board of Shire plc, a specialty biopharmaceutical company, from 2006 to January 2012. Dr. Leiden received his M.D., Ph.D. and B.A. degrees from the University of Chicago.

Dr. Altshuler has been our Executive Vice President, Global Research and Chief Scientific Officer since January 2015 and was a member of our Board of Directors from May 2012 through December 2014. Dr. Altshuler was one of four founding members of the Broad Institute, a research collaboration of Harvard, MIT, The Whitehead Institute and the Harvard Hospitals. He served as the Director of the Institute’s Program in Medical and Population Genetics from 2003 through December 2014 and as the Institute’s Deputy Director and Chief Academic Officer from 2009 through December 2014. Dr. Altshuler joined the faculty at Harvard Medical School and the Massachusetts General Hospital in 2000 and held the academic rank of Professor of Genetics and Medicine from 2008 through December 2014. He served as Adjunct Professor of Biology at MIT from 2012 through December 2014. Dr. Altshuler earned a B.S. from MIT, a Ph.D. from Harvard University and an M.D. from Harvard Medical School. Dr. Altshuler completed his clinical training in Internal Medicine, and in Endocrinology, Diabetes and Metabolism, at the Massachusetts General Hospital.

Mr. Arbuckle is our Executive Vice President and Chief Commercial Officer, a position he has held since September 2012. Prior to joining us, Mr. Arbuckle held multiple commercial leadership roles at Amgen, Inc., a 17,000 person biotechnology company, from July 2004 through August 2012. Mr. Arbuckle has worked in the biopharmaceuticals industry since 1986, including more than 15 years at GlaxoSmithKline plc, where he held sales and marketing roles of increasing responsibility for medicines aimed at treating respiratory, metabolic, musculoskeletal, cardiovascular and other diseases. He has served as a member of the Board of Directors of Cerulean Pharma, Inc. since June 2015. Mr. Arbuckle holds a BSc in pharmacology and physiology from the University of Leeds.

Dr. Chodakewitz is our Executive Vice President, Global Medicines Development and Medical Affairs and Chief Medical Officer. Dr. Chodakewitz joined Vertex as a Senior Vice President in January 2014 and became an Executive Vice President in October 2014. Prior to joining us, Dr. Chodakewitz spent more than 20 years at Merck & Co., Inc., where he held a variety of roles including Vice President of Clinical Research – Infectious Diseases & Vaccines, Vice President of Clinical Pharmacology/Early Stage Development, Senior Vice President of Late Stage Development, and Senior Vice President of Global Scientific Strategy (Infectious Diseases, Respiratory/Immunology). Prior to his tenure at Merck, he served as the Director of the HIV Outpatient Clinic at the Veterans Administration Medical Center in West Haven, Connecticut and held various academic positions at Yale University and New York University Schools of Medicine. Dr. Chodakewitz serves as a member of the Board of Directors of Tetraphase Pharmaceuticals, Inc., a pharmaceutical company. Dr. Chodakewitz holds B.S. in Biochemistry from Yale University, and an M.D. from the Yale University School of Medicine.

Mr. Parini is our Executive Vice President and Chief Legal and Administrative Officer, a position he has held since January 2017. From January 2016 to January 2017, he was our Executive Vice President and Chief Legal Officer. From 2004 until he joined Vertex, Mr. Parini served in various roles of increasing responsibility at Pfizer Inc., most recently as Senior Vice President and Associate General Counsel. Prior to Pfizer, Mr. Parini was an attorney at Akin, Gump, Strauss, Hauer & Feld, L.L.P. Mr. Parini holds a B.A. from Georgetown University and a J.D. from the Georgetown University Law Center.

Mr. Sachdev is our Executive Vice President, Chief Regulatory Officer and Chief of Staff to our CEO, a role he assumed in January 2017. He served as our Executive Vice President, Policy, Access and Value, from October 2014 through December 2016. In 2007, he joined us as a Senior Vice President, and has led our government affairs and public policy activities, as well as our patient advocacy programs. From 2010 through 2013 he established our first international commercial operations in Canada. Prior to joining us, Mr. Sachdev served as Executive Vice President, Health of the Biotechnology Industry Organization (BIO) and was the Deputy Commissioner for Policy at the FDA where he also served in several other senior positions within the FDA. Prior to the FDA, Mr. Sachdev served as Majority Counsel to the Committee on Energy and Commerce in the United States House of Representatives and practiced law at the Chemical Manufacturers Association, and subsequently at the law firm of Ropes & Gray LLP. Mr. Sachdev holds a B.S from Carnegie Mellon University, and a J.D. from Emory University School of Law.

Mr. Smith is our Executive Vice President, Chief Financial Officer and Chief Operating Officer, a role he assumed in January 2017. He was our Executive Vice President and Chief Financial Officer from February 2006 until January 2017, our Senior Vice President and Chief Financial Officer from November 2003 to February 2006, and our Vice President and Chief Financial Officer from October 2001 to November 2003. Prior to joining us, Mr. Smith served as a partner in the Life Science and Technology Practice Group of Ernst & Young LLP, an accounting firm, from 1999 to 2001. Mr. Smith initially joined Ernst & Young’s U.K. firm in 1987, and then joined its Boston office in 1995. Mr. Smith has served as a member of the Boards of Directors of Acorda Therapeutics, Inc., a drug development company, since February 2007, and Infinity Pharmaceuticals, Inc., a drug development company, since May 2008. In August 2016, Mr. Smith joined the Board of Directors of Ophthotech Corporation, a biopharmaceutical company, and was also appointed to serve as Chairman of the Audit Committee of Ophthotech Corporation’s Board. Mr. Smith holds a B.A. in accounting and finance from Manchester Metropolitan University, U.K., is a member of the American Institute of Certified Public Accountants and is a Chartered Accountant of England and Wales.

Mr. Silva is our Senior Vice President and Corporate Controller, a position he has held since April 2011. Mr. Silva joined us in August 2007 as Senior Director, Accounting Operations and was our Vice President and Corporate Controller from September 2008 through April 2011. Prior to joining us, he was the Vice President, Internal Reporting at Iron Mountain Incorporated from July 2006 until August 2007 and a consultant to Iron Mountain’s financing department from April 2005 until July 2006. He was the Finance Director of the Bioscience Technologies Division of Thermo Electron Corporation from 2002 to April 2005. Mr. Silva holds a B.S. in accounting from Assumption College.

Dr. Bhatia has been a member of our Board of Directors since June 2015. Dr. Bhatia is a professor at the Massachusetts Institute of Technology, where she currently serves as the John J. and Dorothy Wilson Professor of Health Sciences & Technology/Electrical Engineering & Computer Science. Prior to joining the Massachusetts Institute of Technology in 2005, Dr. Bhatia was a professor of bioengineering and medicine at the University of California at San Diego from 1998 through 2005. Dr. Bhatia also is an investigator for the Howard Hughes Medical Institute, a member of the Department of Medicine at Brigham and Women’s Hospital, a member of the Broad Institute and a member of the Koch Institute for Integrative Cancer Research. Dr. Bhatia holds an Sc.B. in biomedical engineering from Brown University, an S.M. and Ph.D. in Mechanical Engineering from the Massachusetts Institute of Technology and an M.D. from Harvard Medical School.

Dr. Boger is the founder of Vertex and has been a director since our inception in 1989. He was our Chief Executive Officer from 1992 through May 2009. He was our Chairman of our Board of Directors from 1997 until May 2006 and our President from our inception until December 2000, and from 2005 through February 2009. He was our Chief Scientific Officer from 1989 until May 1992. Prior to founding Vertex in 1989, Dr. Boger held the position of Senior Director of Basic Chemistry at Merck Sharp & Dohme Research Laboratories in Rahway, New Jersey, where he headed both the Department of Medicinal Chemistry of Immunology & Inflammation and the Department of Biophysical Chemistry. Dr. Boger holds a B.A. in chemistry and philosophy from Wesleyan University and M.S. and Ph.D. degrees in chemistry from Harvard University.

Mr. Kearney has been a member of our Board of Directors since May 2011. Mr. Kearney served as the Chief Operating Officer of Hospira, Inc., a specialty pharmaceutical and medication delivery company, from April 2006 to January 2011. From April 2004 to April 2006, he served as Hospira’s Senior Vice President, Finance, and Chief Financial Officer, and he served as Acting Chief Financial Officer through August 2006. Mr. Kearney served as Vice President and Treasurer of Abbott Laboratories from 2001 to April 2004. From 1996 to 2001, Mr. Kearney was Divisional Vice President and Controller for Abbott’s International Division. Mr. Kearney serves as a member of the Board of Directors at Acceleron Pharma Inc., a biopharmaceutical company, and AveXis, Inc., a gene therapy company, and served as a member of the Board of Directors at Innoviva, Inc. (formerly known as Theravance, Inc.), a royalty management company, until April 2016. He received his B.S. in biology from the University of Illinois and his M.B.A. from the University of Denver.

Mr. Lee has been a member of our Board of Directors since September 2012. Mr. Lee serves as an Executive in Residence (XIR) and Partner of General Catalyst Partners, a venture capital firm, positions he has held since April of 2013. Mr. Lee also serves as the Chief Executive Officer of Allego, Inc. and is Executive Chairman of Clarabridge, Inc. Mr. Lee was the Vice President of IBM’s Enterprise Marketing Management Group from November 2010 through January 2013. Mr. Lee co-founded Unica Corporation, a provider of software and services used to automate marketing processes, in 1992, and was Unica’s President and/or Chief Executive Officer from 1992 through November 2010, when Unica was acquired by IBM. From 1989 to 1992, Mr. Lee was a senior consultant at Digital Equipment Corporation, a supplier of general computing technology and consulting services. Mr. Lee holds a B.S. and an M.S. in electrical engineering and computer science from the Massachusetts Institute of Technology and an M.B.A. from Babson College.

Ms. McGlynn has been a member of our Board of Directors since May 2011. Ms. McGlynn served as the President and Chief Executive Officer of the International AIDS Vaccine Initiative, a global not-for-profit organization whose mission is to ensure the development of safe, effective and accessible HIV vaccines for use throughout the world, from July 2011 until September 2015. Ms. McGlynn served as President, Vaccines and Infectious Diseases of Merck & Co., Inc. from 2005 until 2009. Ms. McGlynn joined Merck in 1983 and served in a variety of marketing, sales and managed care roles. Ms. McGlynn serves as a member of the Board of Directors for Air Products and Chemicals, Inc., a company specializing in gases and chemicals for industrial uses, and Amicus Therapeutics, Inc., a biopharmaceutical company. She is also a member of the National Industrial Advisory Committee at the University at Buffalo School of Pharmacy and Pharmaceutical Sciences. Ms. McGlynn holds a B.S. in Pharmacy and an M.B.A. in Marketing from the State University of New York at Buffalo.

Mr. Sachs has been a member of our Board of Directors since 1998. Mr. Sachs is a General Partner at Charles River Ventures, a venture capital firm he joined in 1999. From 1998 to 1999, he served as Executive Vice President and General Manager of Ascend Communications, Inc. From 1997 until 1998, Mr. Sachs served as President and Chief Executive Officer of Stratus Computer, Inc. From 1995 to 1997, he served as Executive Vice President and General Manager of the Internet Telecom Business Group at Bay Networks, Inc. From 1993 to 1995, he served as President and Chief Executive Officer of Xylogics, Inc. Mr. Sachs holds a B.S.E.E. in electrical engineering from Bucknell University, an M.E.E. in electrical engineering from Cornell University, and an M.B.A. from Northeastern University.

Ms. Ullian has been a member of our Board of Directors since 1997. Ms. Ullian served as President and Chief Executive Officer of Boston Medical Center, a private, not-for-profit, 626-bed, academic medical center with a community-based focus,

from 1996 through January 2010. From 1994 to 1996, she served as President and Chief Executive Officer of Boston University Medical Center Hospital. From 1987 to 1994, Ms. Ullian served as President and Chief Executive Officer of Faulkner Hospital. She also serves as a director of Thermo Fisher Scientific Inc. and Hologic, Inc. Ms. Ullian holds a B.A. in political science from Tufts University and an M.P.H. from the University of Michigan.

Mr. Young has been a member of our Board of Directors since May 2014. Mr. Young is a Venture Partner at Clarus Ventures, a life sciences venture capital firm, which he joined in 2010. Prior to Clarus Ventures, Mr. Young served from 1999 until June 2009 as the Chairman and Chief Executive Officer of Monogram Biosciences, Inc., a biotechnology company acquired by Laboratory Corporation of America in June 2009. From 1980 to 1999, Mr. Young was employed at Genentech, Inc. in positions of increasing responsibility, including as Chief Operating Officer from 1997 to 1999, where he was responsible for all product development, manufacturing and commercial functions. Prior to joining Genentech, Mr. Young was with Eli Lilly & Co. for 14 years. Mr. Young currently serves as the Chairman of the Board of Directors of NanoString Technologies, Inc., and as a member of the Board of Directors of Theravance BioPharma Inc. Mr. Young retired from BioMarin Pharmaceutical Inc.’s Board of Directors in November 2015 and from Biogen’s Board of Directors in June 2014. Mr. Young holds a B.S. in Chemical Engineering from Purdue University, an M.B.A. from Indiana University and an Honorary Doctorate in Engineering from Purdue University. Mr. Young was elected to the National Academy of Engineering in 1993 for his contributions to biotechnology.

ITEM 1A. RISK FACTORS

RISK FACTORS

Investing in our common stock involves a high degree of risk, and you should carefully consider the risks and uncertainties described below in addition to the other information included or incorporated by reference in this Annual Report on Form 10-K. If any of the following risks or uncertainties actually occurs, our business, financial condition or results of operations would likely suffer, possibly materially. In that case, the trading price of our common stock could decline.

Risks Related to Our Business

Our business and future revenues depend heavily on ORKAMBI net product revenues. If we are unable to increase our ORKAMBI net product revenues or if we do not meet the expectations of investors or public equity market analysts, our business will be materially harmed and the market price of our common stock would likely decline.

ORKAMBI was approved by the FDA in July 2015 and by the European Commission in November 2015, for the treatment of patients with CF twelve years of age and older who are homozygous for the F508del mutation in their CFTR gene. In September 2016, the FDA approved ORKAMBI for the treatment of patients with CF six to eleven years of age who are homozygous for the F508del mutation in their CFTR gene. Most of our ORKAMBI net product revenues have come from the United States and, except with respect to Germany, we have not recognized significant ex-U.S. net product revenues due to the time it takes to complete reimbursement discussions in many ex-U.S. countries. We have experienced challenges in the commercialization of ORKAMBI, including discontinuations by patients who had previously initiated treatment with ORKAMBI and a slower than anticipated launch in Germany. Our ability to increase ORKAMBI net product revenues will be dependent on:


•	our ability to obtain, and the timing and terms of obtaining, reimbursement for ORKAMBI in ex-U.S. markets;


•	the number of additional patients who begin treatment with ORKAMBI, including patients six to eleven years of age in the United States;


•	the rate at which additional patients initiate treatment;


•	the proportion of initiated patients who remain on treatment; and


•	the compliance rate for patients who remain on treatment.

If we continue to experience challenges with the commercialization of ORKAMBI or if ORKAMBI were to become subject to problems such as safety or efficacy issues, the introduction or greater acceptance of competing products, changes in reimbursement policies of payors and other third parties, or adverse legal, administrative, regulatory or legislative developments, our ability to commercialize ORKAMBI would be impaired and our stock price would likely decline. Since the regulations that govern pricing, coverage and reimbursement for drugs vary widely from country to country, there is no assurance that coverage and reimbursement will be available outside of the United States and, even if it is available, the timing or the level of reimbursement may not be satisfactory. Adverse pricing limitations or a delay in obtaining coverage and reimbursement would decrease our future net product revenues and harm our business.

Our business is dependent on KALYDECO net product revenues and if we are unable to sustain our KALYDECO net product revenues, our business will be materially harmed and the market price of our common stock would decline.

KALYDECO net product revenues represented approximately 41% and 61% of our total revenues in 2016 and 2015, respectively, and we expect KALYDECO net product revenues to continue to represent a substantial portion of our total revenues in future periods. We are seeking to expand the label for KALYDECO and to increase the number of patients eligible and reimbursed for treatment with KALYDECO in the United States and ex-U.S. markets. We have initiated a clinical trial for ivacaftor in patients with CF less than two years of age to evaluate the effect of ivacaftor on markers of CF disease in young children. There can be no assurance that the data from this clinical trial will be sufficient to obtain approval for ivacaftor in this patient population. Additionally, in February 2016, we received a Complete Response Letter from the FDA regarding our sNDA for ivacaftor for patients with CF two years of age and older who have one of 23 residual function mutations. The FDA determined that it cannot approve the sNDA in its present form. While we have had discussions with

the FDA regarding the sNDA to determine an appropriate path forward, there can be no assurance that the outcome from these discussions will be sufficient to obtain approval for ivacaftor in this patient population.

If we are unable to sustain KALYDECO net products revenues for any reason, such as safety or efficacy issues, the introduction or greater acceptance of competing products, changes in reimbursement policies of payors and other third parties, or adverse legal, administrative, regulatory or legislative developments, our ability to commercialize KALYDECO would be impaired and our product revenues would decrease and our financial position and stock price would be materially harmed.

If we are unable to successfully develop additional drug candidates, and in particular tezacaftor in combination with ivacaftor and triple combination regimens including next-generation CFTR corrector compounds, our business will be materially harmed.

Our long-term success and revenue growth will depend upon our ability to successfully develop new products. We believe that a significant portion of the value attributed to our company by investors is based on the potential of the combination regimens that we are developing for the treatment of CF, including tezacaftor in combination with ivacaftor, which is Phase 3 development, and triple combination regimens that include our next-generation CFTR corrector compounds, including VX-152 and VX-440, each of which are in Phase 2 development, VX-659, which is in Phase 1 development, and VX-445, which we expect will enter Phase 1 development in the first quarter of 2017. Furthermore, our success will be dependent on our ability to successfully develop and ultimately commercialize drug candidates in therapeutic areas outside of CF, including drug candidates resulting from our internal research programs and drug candidates that have been or may in the future be licensed or acquired from third parties.

Drug development is inherently risky and we will be required to undertake additional clinical trials before such candidates become eligible for marketing approval. The results of clinical trials and findings from our nonclinical studies for these drug candidates, including toxicology findings in nonclinical studies conducted concurrently with clinical trials, could lead to abrupt changes in our development activities, including the possible cessation of development activities associated with a particular drug candidate or program. Many companies in the pharmaceutical and biotechnology industries, including our company, have suffered significant setbacks in later-stage clinical trials even after achieving promising results in earlier-stage clinical trials. Accordingly, the results from completed preclinical studies and clinical trials may not be replicated in later clinical trials, and ongoing clinical trials for our drug candidates may not be predictive of the results we may obtain in later-stage clinical trials or of the likelihood of approval of a drug candidate for commercial sale.

We expect data from our Phase 3 development program evaluating tezacaftor in combination with ivacaftor in the first half of 2017. If supported by data from the Phase 3 development program, we plan to submit an NDA to the FDA for tezacaftor in combination with ivacaftor in the second half of 2017. We expect to begin receiving data from clinical trials evaluating triple combination treatment regimens in the second half of 2017. If our ongoing or planned clinical trials for our drug candidates, are not successful, or if we fail to expand our pipeline outside of CF, our business will be materially harmed.

We have a history of incurring losses, and we cannot predict the extent of our future profitability.

We have incurred operating losses in each of the last three years. While our revenues have increased and our operating losses have decreased in each of the last three years, we have not achieved annual profitability on a GAAP basis. Our ability to achieve and sustain profitability depends on the extent to which we can continue to increase our revenue and control our costs in order to, among other things, counter any unforeseen difficulties, complications or other unknown factors that may impair future revenue or require additional expenditures. Our ability to increase our revenues is dependent on our ability to increase our sales of ORKAMBI, to maintain sales of KALYDECO and to develop and commercialize additional products. Our operating expenses may increase due to, among other factors, additional investments to support or accelerate our research and development activities, the expansion of our organization, and/or costs associated with business development activities, including costs to acquire assets or programs, integration costs and the costs to develop drug candidates that are acquired. Because of the numerous risks and uncertainties associated with pharmaceutical product development, we are unable to predict the extent of our future profitability or losses. If we are unable to increase sales of ORKAMBI, sustain sales of KALYDECO and develop additional products, we may not achieve and/or sustain profitability.

If our competitors bring drugs with superior product profiles to market, our drugs may not be competitive and our revenues could decline.

ORKAMBI, KALYDECO and any drugs that we develop in the future may not be able to compete effectively with marketed drugs or new drugs that may be developed by competitors. The risk of competition is specifically important to our company because substantially all of our revenues as well as our most advanced drug candidates are related to the treatment of patients with CF. There are many other companies developing drugs for the same indications that we are pursuing. In order to compete successfully in these areas, we must demonstrate improved safety, efficacy and/or tolerability, and ease of manufacturing, and gain and maintain market acceptance over competing drugs. Many of our competitors, including major pharmaceutical companies such as Abbvie, Bristol-Myers Squibb, Gilead, Johnson & Johnson, Merck, Merck KGaA, Novartis, Pfizer, Sanofi and Roche, possess substantially greater financial, technical and human resources than we possess. Potential competitors also include other public and private companies, academic institutions, government agencies, other public and private research organizations and charitable venture philanthropy organizations that conduct research, seek patent protection and/or establish collaborative arrangements for research, development, manufacturing and commercialization. As an example, in 2013 and 2014 we experienced a rapid decline in the number of patients being treated with INCIVEK, a product we previously marketed for the treatment of hepatitis C virus infection.

Mergers and acquisitions in the pharmaceutical and biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors. Smaller and other early-stage companies also may prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These third parties compete with us in recruiting and retaining qualified scientific and management personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

A number of companies are seeking to identify and develop drug candidates for the treatment of CF, including Galapagos NV in collaboration with Abbvie, Concert Pharmaceuticals, Genzyme, which is a division of Sanofi, Novartis, Pfizer, ProQR Therapeutics, Proteostasis Therapeutics, PTC Therapeutics and several private companies. Our competitors have research and development programs directed at identifying CFTR potentiators, CFTR correctors, ENaC inhibitors and drug candidates with other mechanisms of action or that utilize new therapeutic approaches that seek to address the underlying cause of CF. Our success in rapidly developing and commercializing ORKAMBI and KALYDECO may increase the resources that our competitors allocate to the development of these potential treatments for CF. Our competitors are exploring the development of drug candidates both as monotherapies and as part of combination regimens. If one or more competing therapies are successfully developed as a treatment for patients with CF, our revenues from ORKAMBI, KALYDECO and/or other compounds, if then approved, could face competitive pressures. If one or more competing therapies prove to be superior to our existing products and/or drug candidates for the treatment of CF, our business would be materially adversely affected.

If we discover safety issues with any of our products or if we fail to comply with continuing U.S. and applicable foreign regulations, commercialization efforts for the product could be negatively affected, the approved product could lose its approval or sales could be suspended, and our business could be materially harmed.

Our products are subject to continuing regulatory oversight, including the review of additional safety information. Drugs are more widely used by patients once approval has been obtained and therefore side-effects and other problems may be observed after approval that were not seen or anticipated, or were not as prevalent or severe, during pre-approval clinical trials or nonclinical studies. The subsequent discovery of previously unknown problems with a product could negatively affect commercial sales of the product, result in restrictions on the product or lead to the withdrawal of the product from the market. Each of our two commercial products and our most advanced drug candidates, contain ivacaftor, either alone or in combination with one or more other compounds. As a result, if either of our products were to experience safety issues, both ORKAMBI and KALYDECO, as well as one or more of our drug candidates, may be adversely affected. The reporting of adverse safety events involving our products or public speculation about such events could cause our stock price to decline or experience periods of volatility.

If we or our collaborators fail to comply with applicable continuing regulatory requirements, we or our collaborators may be subject to fines, suspension or withdrawal of regulatory approvals for specific products, product recalls and seizures, operating restrictions and/or criminal prosecutions. In addition, the manufacturers we engage to make our products and the manufacturing facilities in which our products are made are subject to periodic review and inspection by the FDA and foreign regulatory authorities. If problems are identified during the review or inspection of these manufacturers or manufacturing

facilities, it could result in our inability to use the facility to make our product or a determination that inventories are not safe for commercial sale.

If physicians and patients do not accept our drugs, or if patients do not remain on treatment or comply with the prescribed dosing regimen, our product revenues would be materially harmed in future periods.

Our drugs may not gain or maintain market acceptance among physicians and patients. Effectively marketing our drugs and any of our drug candidates, if approved, requires substantial efforts, both prior to launch and after approval. Physicians may elect not to prescribe our drugs, and patients may elect not to take them or may discontinue use of our drugs after initiation of treatment, for a variety of reasons including:


•	prevalence and severity of adverse side-effects;


•	lack of reimbursement availability from third-party payors;


•	lower demonstrated efficacy, safety and/or tolerability compared to alternative treatment methods;


•	lack of cost-effectiveness;


•	a decision to wait for the approval of other therapies in development that have significant perceived advantages over our drug;


•	convenience and ease of administration;


•	other potential advantages of alternative treatment methods; and


•	ineffective sales, marketing and/or distribution support.

For example, our net product revenues from ORKAMBI during 2016 were affected by discontinuations by patients who had previously initiated treatment with ORKAMBI. If the discontinuation rate for ORKAMBI or any of our other drug products increases, or if our drugs otherwise fail to achieve or maintain market acceptance, we may not be able to generate significant revenues in future periods.

Government and other third-party payors seek to contain costs of health care through legislative and other means. If they fail to provide coverage and adequate reimbursement rates for our products, our revenues will be harmed.

In both domestic and foreign markets, our sales of products depend in part upon the availability of reimbursement from third-party payors. Third-party payors include government health programs such as Medicare and Medicaid in the United States and the national health care systems in many international markets, managed care providers, private health insurers and other organizations. The trend in the health care industry is cost containment and efforts of third-party payors to contain or reduce health care costs that may adversely affect our ability to establish or maintain appropriate prices for our products or any drugs that we may develop and commercialize. In most ex-U.S. markets, pricing or profitability of therapeutic and other pharmaceutical products is subject to governmental control and such government authorities are increasingly attempting to limit or regulate the price of drug products, particularly under recent global economic pressures and geopolitical uncertainty particularly in Europe. Reimbursement agencies in Europe are often more conservative than those in the United States and the reimbursement process is often slower since reimbursement decisions are made on a country-by-country basis. In the United States, there have been, and we expect that there will continue to be, a number of federal and state proposals to implement similar governmental control as currently exists in Europe. The ACA requires discounts under the Medicare drug benefit program and increased the rebates paid by pharmaceutical companies on drugs covered by Medicaid. The ACA also imposes an annual fee, which increases annually, on sales by branded pharmaceutical manufacturers.

In addition, third-party payors attempt to contain health care costs by demanding price discounts or rebates and limiting both the types and variety of drugs that they will cover and the amounts that they will pay for drugs. As a result, they may not cover or provide adequate payment for our products. We might need to conduct post-marketing studies in order to demonstrate the cost-effectiveness of our products or any other future products to such payors’ satisfaction. Such studies might require us to commit a significant amount of management’s time and our financial and other resources. Our products might not ultimately be considered cost-effective. Adequate third-party reimbursement might not be available to enable us to maintain price levels sufficient to realize an appropriate return on our investment in product development.

Reimbursement rates vary according to the use of the drug and the clinical setting in which it is used, may be based on payments allowed for lower-cost products that already are reimbursed, may be incorporated into existing payments for other products or services and may reflect budgetary constraints and/or imperfections in the data used to calculate these rates. Net prices for products are reduced by mandatory discounts or rebates required by government health care programs and privately-negotiated discounts. While we have implemented policies in an effort to comply with mandated reimbursement rates, the U.S. federal government, state governments and private payors frequently pursue actions against pharmaceutical and biotechnology companies alleging that the companies have overstated prices in order to inflate reimbursement rates. Any such action could adversely affect the pricing of and revenues from our products.

In the United States and some foreign jurisdictions, there have been a number of legislative and regulatory proposals and initiatives to change the health care system in ways that could affect our ability to sell products. For example the ACA was enacted under the prior U.S. administration, and there is significant uncertainty regarding changes in the laws and regulations applicable to the health care system that may be made under the new administration, and, in particular, the effect any such changes may have on our business. Some of these proposed and implemented reforms have resulted, or could result, in reduced reimbursement rates and/or more limited access for our current or future products, which would adversely affect our business, operations and financial results.

Specialty pharmaceuticals are drugs that are prescribed by specialist physicians to treat rare or life-threatening conditions and typically address smaller patient populations. Each of ORKAMBI and KALYDECO is a specialty pharmaceutical product and our research and development programs are primarily focused on developing additional specialty pharmaceutical products. The increasing availability and use of innovative specialty pharmaceuticals, combined with their relative higher cost as compared to other types of pharmaceutical products, is beginning to generate significant third-party payor interest in developing cost-containment strategies targeted to this sector. Government regulations in both non-U.S. and U.S. markets could limit the prices that can be charged for our products and may limit our commercial opportunity. The increasing use of health technology assessments in markets around the world and the financial challenges faced by many governments may lead to significant adverse effects on our business.

Any legislation or regulatory changes or relaxation of laws that restrict imports of drugs from other countries also could reduce the net price we receive for our products.

If regulatory authorities interpret any of our conduct, including our marketing practices, as being in violation of applicable health care laws, including fraud and abuse laws, laws prohibiting off-label promotion, disclosure laws or other similar laws, we may be subject to civil or criminal penalties.

We are subject to health care fraud and abuse laws, such as the federal False Claims Act and the anti-kickback provisions of the federal Social Security Act, laws prohibiting off-label product promotion and other similar laws and regulations both in United States and in non-U.S. markets. While we have a corporate compliance program designed to actively identify, prevent and mitigate risk through the implementation of compliance policies and systems and the promotion of a culture of compliance, if we are found not to be in full compliance with these laws our business could be materially harmed.

The federal anti-kickback law prohibits knowingly and willfully offering, paying, soliciting, receiving or providing remuneration, directly or indirectly, in exchange for or to induce either the referral of an individual, or the ordering, furnishing, arranging for or recommending of an item or service that is reimbursable, in whole or in part, by a federal health care program, such as Medicare or Medicaid. The federal statute has been interpreted to apply to arrangements between pharmaceutical manufacturers on the one hand and prescribers, patients, purchasers and formulary managers on the other hand, and therefore constrains our marketing practices and our various service arrangements with physicians, including physicians who make clinical decisions to use our products. Although there are a number of statutory exemptions and regulatory safe harbors protecting certain common activities from prosecution, the exemptions and safe harbors are drawn narrowly and have been interpreted by courts as such.

Federal false claims laws prohibit any person from knowingly presenting, or causing to be presented, a false claim for payment to the federal government, or knowingly making, or causing to be made, a false statement to get a false claim paid. Pharmaceutical companies have been prosecuted under these laws for a variety of alleged promotional and marketing activities, such as providing free product to customers with the expectation that the customers would bill federal programs for the product; reporting to pricing services inflated average wholesale prices that were then used by federal programs to set reimbursement rates; engaging in promotion for uses that the FDA has not approved, known as “off-label” uses, that caused claims to be submitted to Medicaid for non-covered off-label uses; submitting inflated “best price” information to the

Medicaid Rebate Program; and certain manufacturing-related violations. The scope of this and other laws may expand in ways that make compliance more difficult and expensive.

Although physicians are permitted, based on their medical judgment, to prescribe products for indications other than those approved by the FDA, manufacturers are prohibited from promoting their products for such off-label uses. We market ORKAMBI and KALYDECO to eligible CF patients for whom the applicable product has been approved and provide promotional materials and training programs to physicians regarding the use of ORKAMBI and KALYDECO in these patient populations. These eligible patients represent only a portion of the total patients with CF. If the FDA determines that our promotional materials, training or other activities constitute off-label promotion, it could request that we modify our training or promotional materials or other activities, conduct corrective advertising or subject us to regulatory enforcement actions, including the issuance of a warning letter, injunction, seizure, civil fine and criminal penalties. It also is possible that other federal, state or foreign enforcement authorities might take action if they believe that the alleged improper promotion led to the submission and payment of claims for an off-label use, which could result in significant fines or penalties under other statutory authorities, such as laws prohibiting false claims for reimbursement. Even if it is later determined we were not in violation of these laws, we may be faced with negative publicity, incur significant expenses defending our actions and have to divert significant management resources from other matters.

Also applicable to some of our practices is the Health Insurance Portability and Accountability Act, or HIPAA, and its implementing regulations, which created federal criminal laws that prohibit executing a scheme to defraud any health care benefit program or making false statements relating to health care matters and which also imposes certain regulatory and contractual requirements regarding the privacy, security and transmission of individually identifiable health information. In addition, the ACA includes various provisions designed to strengthen significantly fraud and abuse enforcement, such as increased funding for enforcement efforts and the lowering of the intent requirement of the federal anti-kickback statute and criminal health care fraud statute such that a person or entity no longer needs to have actual knowledge of this statute or specific intent to violate it.

In recent years, legislation has been adopted at the federal, state and local level requiring pharmaceutical companies to establish marketing compliance programs, file periodic reports or make periodic public disclosures on sales, marketing, pricing, clinical trials, health care provider payments and other activities. For example, as part of the ACA, the federal government enacted the Open Payments (commonly known as the Sunshine Act) provisions. Open Payments requires pharmaceutical manufacturers to report annually to the Centers for Medicare and Medicaid Services payments or other transfers of value made by that entity to physicians and teaching hospitals. We also now have similar reporting obligations throughout the European Union. We expended significant efforts to establish, and are continuing to devote significant resources to maintain and enhance, systems and processes in order to comply with these regulations. Failure to comply with the reporting requirements would result in significant civil monetary penalties.

The sales and marketing practices of our industry have been the subject of increased scrutiny from governmental entities in the United Sates and other countries in which we market our products, and we believe that this trend will continue. The risk of our being found in violation of these laws is increased by the fact that many of them have not been fully interpreted by the regulatory authorities or the courts, and their provisions are subject to a variety of interpretations. If our past or present operations are found to be in violation of any such laws or any other governmental regulations that may apply to us, we may be subject to penalties, including civil and criminal penalties, damages, fines, exclusion from federal health care programs and/or the curtailment or restructuring of our operations. Any action against us for violation of these laws, even if we successfully defend against them, also could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business.

Changes in laws and regulations governing the privacy and protection of data and personal information could adversely affect our business.

We are subject to data privacy and protection laws and regulations that apply to the collection, transmission, storage and use of proprietary information and personally-identifying information, including HIPAA, which among other things, imposes certain requirements relating to the privacy, security and transmission of individually identifiable health information. In addition to HIPAA, numerous other federal and state laws, including state security breach notification laws, state health information privacy laws and federal and state consumer protection laws, govern the collection, use and disclosure of personal information. Various foreign countries also have, or are developing, laws governing the collection, use and transmission of personal information. The legislative and regulatory landscape for privacy and data protection continues to evolve, and there has been an increasing amount of focus on privacy and data protection issues with the potential to affect our

business. We have in the past relied on adherence to the U.S.-EU Safe Harbor Framework as agreed to and set forth by the U.S. Department of Commerce and the European Union, which established a means for legitimizing the transfer of personal information by U.S. companies doing business in Europe from the European Economic Area to the United States. As a result of a 2015 opinion of the European Union Court of Justice, the U.S.-EU Safe Harbor Framework was deemed to be an invalid method of compliance with restrictions regarding the transfer of data outside of the European Economic Area. In response to the invalidation of the U.S.-EU Safe Harbor Framework, we have utilized other sanctioned approaches for transferring personal information from the European Union to the United States, such as standard contractual clauses that have been approved by the European Commission. While we continue to address the implications of changes to European Union data privacy regulations, the area remains an evolving landscape with new regulations coming into effect and continued legal challenges and our efforts to comply with the evolving data protection rules may be unsuccessful. Failure to comply with laws regarding data protection would expose us to risk of enforcement actions taken by data protection authorities in the European Union and the potential for significant penalties if we are found to be non-compliant. Even if we are not determined to have violated these laws, government investigations into these issues typically require the expenditure of significant resources and generate negative publicity, which could harm our business.

On January 1, 2015, the EMA adopted a new policy on publication of clinical data whereby it will publish clinical reports submitted as part of MAAs for drugs. The policy applies to all clinical reports submitted after January 1, 2015 and the reports will be released as soon as a decision on the application has been made by the EMA. While implementation of this policy is ongoing and its full effect on our business is not yet known, the ability of third-parties to review and/or analyze the raw data from our clinical trials may increase the risk of patient confidentiality breaches and could result in enhanced scrutiny of our clinical trials results. Such scrutiny could result in misconceptions being spread about our drugs and drug candidates, even if the underlying analysis of such review turns out to be flawed. These publications could also result in the disclosure of information to our competitors that we might otherwise deem confidential, which could harm our competitive position.

The increasing use of social media platforms presents risks and challenges.

Social media increasingly is being used by third parties to communicate about our products and drug candidates and the diseases our therapies are designed to treat. We believe that members of the CF community may be more active on social media as compared to other patient populations due to the demographics of this patient population. Social media practices in the pharmaceutical and biotechnology industries are evolving, which creates uncertainty and risk of noncompliance with regulations applicable to our business. For example, patients may use social media platforms to comment on the effectiveness of, or adverse experiences with, a drug or a drug candidate, which could result in reporting obligations. In addition, there is a risk of inappropriate disclosure of sensitive information or negative or inaccurate posts or comments about us on any social networking website. If any of these events were to occur or we otherwise fail to comply with applicable regulations, we could incur liability, face restrictive regulatory actions or incur other harm to our business.

Risks Related to Development, Clinical Testing and Regulation of Our Products and Drug Candidates

Our drug candidates remain subject to clinical testing and regulatory approval. If we are unable to successfully develop additional drug candidates, and in particular tezacaftor in combination with ivacaftor and triple combination regiments including next-generation CFTR corrector compounds, our business will be materially harmed.

Our business depends upon the successful development and commercialization of drug candidates. These drug candidates are in various stages of development and must satisfy rigorous standards of safety and efficacy before they can be approved for sale by the FDA or comparable foreign regulatory authorities. To satisfy these standards, we must allocate resources among our various development programs and must engage in expensive and lengthy testing of our drug candidates. Discovery and development efforts for new pharmaceutical products, including new combination therapies, are resource-intensive and may take 10 to 15 years or longer for each drug candidate. Despite our efforts, our drug candidates may not:


•	offer therapeutic or other improvement over existing competitive therapies;


•	be proven safe and effective in clinical trials;


•	meet applicable regulatory standards;


•	be capable of being produced in commercial quantities at acceptable costs; or


•	if approved for commercial sale, be successfully marketed as pharmaceutical products.

We have recently completed and/or have ongoing or planned clinical trials for several of our drug candidates, including drug candidates for the treatment of CF, oncology, pain and neurology. The strength of our company’s product portfolio and pipeline will depend in large part upon the outcomes of these clinical trials and our ability to develop and commercialize combination treatments for CF that include ivacaftor in combination with (i) tezacaftor and/or (ii) our next-generation CFTR corrector compounds, including VX-152, VX-440, VX-659 and VX-445. Results of our clinical trials and findings from our nonclinical studies, including toxicology findings in nonclinical studies conducted concurrently with clinical trials, could lead to abrupt changes in our development activities, including the possible cessation of development activities associated with a particular drug candidate or program. Moreover, clinical data are often susceptible of varying interpretations and analyses, and many companies that have believed their drug candidates performed satisfactorily in clinical trials have nonetheless failed to obtain marketing approval of their drug candidate. Furthermore, results from our clinical trials may not meet the level of statistical significance required by the FDA or other regulatory authorities for approval of a drug candidate.

Many companies in the pharmaceutical and biotechnology industries, including our company, have suffered significant setbacks in later-stage clinical trials even after achieving promising results in earlier-stage clinical trials. Accordingly, the results from completed preclinical studies and clinical trials may not be replicated in later clinical trials, and ongoing clinical trials for our drug candidates may not be predictive of the results we may obtain in later-stage clinical trials or of the likelihood of approval of a drug candidate for commercial sale. In addition, from time to time we report interim data from our clinical trials. Interim data from a clinical trial may not be predictive of final results from the clinical trial.

If we are unable to obtain regulatory approval, we will be unable to commercialize our drug candidates.

The time required to complete clinical trials and to satisfy the FDA and other countries’ regulatory review processes is uncertain and typically takes many years. Our analysis of data obtained from nonclinical and clinical activities is subject to confirmation and interpretation by regulatory authorities, which could delay, limit or prevent regulatory approval. We also may encounter unanticipated delays or increased costs due to government regulation from future legislation or administrative action or changes in governmental policy during the period of drug development, clinical trials and governmental regulatory review.

We may seek a Fast Track and/or Breakthrough Therapy designation for some of our drug candidates. For example, a number of our drugs and drug candidates, including ivacaftor, lumacaftor, tezacaftor, VX-371, VX-440, VX-152, VX-445 and VX-220 have been granted Fast Track designation in the United States. Ivacaftor and the combination regimens of lumacaftor with ivacaftor and tezacaftor with ivacaftor were designated as Breakthrough Therapies. Drug candidates that receive one or both of these designations may be eligible for, among other things, a priority regulatory review. Each of these designations is within the discretion of the FDA. Accordingly, even if we believe one of our drug candidates meets the criteria for Fast Track and/or Breakthrough Therapy designation, the FDA may disagree and instead determine not to make such designation. The receipt of one or both of these designations for a drug candidate does not guarantee a faster development process, review or approval compared to drugs considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, even if one or more of our drugs or drug candidates qualifies for Fast Track and/or Breakthrough Therapy designation, the FDA may later decide to withdraw such designation if it determines that the drug or drug candidate no longer meets the conditions for qualification.

Any failure to obtain regulatory approvals for a drug candidate would prevent us from commercializing that drug candidate. Any delay in obtaining required regulatory approvals could materially adversely affect our ability to successfully commercialize a drug candidate. Furthermore, any regulatory approval to market a drug may be subject to limitations that we do not expect on the indicated uses for which we may market the drug. Any such limitations could reduce the size of the market for the drug.

We also are subject to numerous foreign regulatory requirements governing the conduct of clinical trials, manufacturing and marketing authorization, pricing and third-party reimbursement. Non-U.S. jurisdictions have different approval procedures than those required by the FDA, and these jurisdictions may impose additional testing requirements for our drug candidates. The foreign regulatory approval process includes all of the risks associated with the FDA approval process described above, as well as risks attributable to the satisfaction of foreign requirements. Approval by the FDA does not ensure approval by regulatory authorities outside the United States and approval by a foreign regulatory authority does not ensure approval by the FDA. In addition, although the FDA may accept data from clinical trials conducted outside the United States, acceptance of this data is subject to conditions imposed by the FDA. For example, the clinical trial must be well

designed and conducted and performed by qualified investigators in accordance with ethical principles. The trial population also must adequately represent the U.S. population, and the data must be applicable to the U.S. population and U.S. medical practice in ways that the FDA deems clinically meaningful. In addition, while these clinical trials are subject to the applicable local laws, FDA acceptance of the data will depend on its determination that the trials also complied with all applicable U.S. laws and regulations. If the FDA does not accept the data from any trial that we conduct outside the United States, it would likely result in the need for additional trials, which would be costly and time-consuming and delay or permanently halt our development of the applicable drug candidate.

If clinical trials are prolonged or delayed, our development timelines for the affected development program could be extended, our costs to develop the drug candidate could increase and the competitive position of the drug candidate could be adversely affected.

We cannot predict whether or not we will encounter problems with any of our completed, ongoing or planned clinical trials that will cause us or regulatory authorities to delay or suspend clinical trials, or delay the analysis of data from our completed or ongoing clinical trials. Among the factors that could delay our development programs are:


•	ongoing discussions with the FDA or comparable foreign authorities regarding the scope or design of our clinical trials and the number of clinical trials we must conduct;


•	delays in enrolling volunteers or patients into clinical trials, including as a result of low numbers of patients that meet the eligibility criteria for the trial;


•	a lower than anticipated retention rate of volunteers or patients in clinical trials;


•	the need to repeat clinical trials as a result of inconclusive results, unforeseen complications in testing or clinical investigator error;


•	inadequate supply or deficient quality of drug candidate materials or other materials necessary for the conduct of our clinical trials;


•	unfavorable FDA or foreign regulatory authority inspection and review of a manufacturing facility that supplied clinical trial materials or its relevant manufacturing records or a clinical trial site or records of any clinical or preclinical investigation;


•	unfavorable scientific results from clinical trials;


•	serious and unexpected drug-related side-effects experienced by participants in our clinical trials or by participants in clinical trials being conducted by our competitors to evaluate drug candidates with similar mechanisms of action or structures to drug candidates that we are developing;


•	favorable results in testing of our competitors’ drug candidates, or FDA or foreign regulatory authority approval of our competitors’ drug candidates; or


•	action by the FDA or a foreign regulatory authority to place a clinical hold or partial clinical hold on a trial or compound or deeming the clinical trial conduct as problematic.

Our ability to enroll patients in our clinical trials in sufficient numbers and on a timely basis is subject to a number of factors, including the size of the patient population, the nature of the protocol, the proximity of patients to clinical sites, the availability of effective treatments for the relevant disease, the number of other clinical trials ongoing and competing for patients in the same indication and the eligibility criteria for the clinical trial. In addition, patients may drop out of our clinical trials or may be lost to follow-up medical evaluation after treatment ends, and this could impair the validity or statistical significance of the trials. Delays in patient enrollment or unforeseen drop-out rates may result in increased costs and longer development times.

We, our collaborators, the FDA or other applicable regulatory authorities may suspend clinical trials of a drug candidate at any time if we or they believe the healthy volunteers or patients participating in such clinical trials are being exposed to unacceptable health risks or for other reasons. Any such suspension could materially adversely affect the development of a particular drug candidate and our business.

If our processes and systems are not compliant with regulatory requirements, we could be subject to restrictions on marketing our products or could be delayed in submitting regulatory filings seeking approvals for our drug candidates.

We have a number of regulated processes and systems that are required to obtain and maintain regulatory approval for our drugs and drug candidates. These processes and systems are subject to continual review and periodic inspection by the FDA and other regulatory bodies. In addition, the clinical research organizations and other third parties that we work with in our non-clinical studies and clinical trials and our oversight of such parties are subject to similar reviews and periodic inspection by the FDA and other regulatory bodies. If compliance issues are identified at any point in the development and approval process, we may experience delays in filing for regulatory approval for our drug candidates, or delays in obtaining regulatory approval after filing. Any later discovery of previously unknown problems or safety issues with approved drugs or manufacturing processes, or failure to comply with regulatory requirements, may result in restrictions on such drugs or manufacturing processes, withdrawal of drugs from the market, the imposition of civil or criminal penalties or a refusal by the FDA and/or other regulatory bodies to approve pending applications for marketing approval of new drugs or supplements to approved applications, any of which could have a material adverse effect on our business. In addition, we are a party to agreements that transfer responsibility for complying with specified regulatory requirements, such as filing and maintenance of marketing authorizations and safety reporting or compliance with manufacturing requirements, to our collaborators and third-party manufacturers. If our collaborators or third-party manufacturers do not fulfill these regulatory obligations, any drugs for which we or they obtain approval may be subject to later restrictions on manufacturing or sale, which could have a material adverse effect on our business.

Risks Related to Collaborations and other Business Development Activities

Our ability to execute on our long-term strategy depends in part on our ability to acquire rights to additional drugs, drug candidates and other technologies that have the potential to add to our pipeline or provide us with new commercial opportunities.

In order to achieve our long-term business objectives, our strategy is to supplement our internal pipeline by acquiring rights to additional drugs, drug candidates and other technologies that have the potential to provide us with new commercial opportunities, including in the field of treating CF and in therapeutic areas outside of CF. We may not be able to acquire, in-license or otherwise obtain rights to additional drugs, drug candidates or other technologies on acceptable terms or at all. We have faced and will continue to face significant competition for these types of drugs, drug candidates and other technologies from a variety of other companies with interests in the specialty pharmaceutical marketplace, many of which have significantly more financial resources and experience in business development activities than we have. In addition, non-profit organizations may be willing to provide capital to the companies that control additional drugs, drug candidates or technologies, which may provide incentives for companies to advance these drugs, drug candidates or technologies independently. Because of these competitive pressures, the cost of acquiring, in-licensing or otherwise obtaining rights to such drugs, drug candidates or other technologies has grown dramatically in recent years and may be at levels that we cannot afford or that we believe are not justified by market potential. This competition is most intense for approved drugs and late-stage drug candidates, which have the lowest risk and would have the most immediate effect on our financial performance.

We may not realize the anticipated benefits of potential acquisitions or licenses to businesses, drugs, drug candidates and other technologies, and the integration following any such acquisition or license may disrupt our business and management.

We may acquire a business or the rights to drugs, drug candidates or other technologies. In recent years we have entered into numerous collaboration agreements, including our collaboration with Parion pursuant to which we exclusively licensed investigational ENaC inhibitors, including VX-371, our agreement with CRISPR to collaborate on the discovery and development of potential new treatments aimed at the underlying genetic causes of human diseases using CRISPR-Cas9 gene editing technology and our agreement with Moderna pursuant to which we are seeking to identify and develop mRNA therapeutics for the treatment of CF. With respect to each of these transactions and any additional acquisition of a business or rights to drugs, drug candidates or other technologies, we may not realize the anticipated benefits of such transaction, each of which involves numerous risks. These risks include:


•	failure to successfully further develop the acquired or licensed drugs or technology or to achieve strategic objectives, including successfully developing and commercializing the drugs, drug candidates or technologies that we acquire or license;


•	inadequate or unfavorable data from clinical trials evaluating the acquired or licensed drug or drug candidates;


•	entry into markets in which we have no or limited direct prior experience or where competitors in such markets have stronger market positions;


•	disruption of our ongoing business and distraction of our management and employees from other opportunities and challenges;

•

potential failure of the due diligence processes to identify significant problems, liabilities or other shortcomings or challenges of an acquired company, or acquired or licensed product or technology, including but not limited to, problems, liabilities or other shortcomings or challenges with respect to intellectual property, product quality, safety, accounting practices, employee, customer or third party relations and other known and unknown liabilities;


•	liability for activities of the acquired company or licensor before the acquisition or license, including intellectual property infringement claims, violations of laws, commercial disputes, tax liabilities, and other known and unknown liabilities;


•	exposure to litigation or other claims in connection with, or inheritance of claims or litigation risk as a result of an acquisition or license, including but not limited to, claims from terminated employees, customers, former equity holders or other third-parties;


•	difficulty in integrating the drugs, drug candidates, technologies, business operations and personnel of an acquired company; and


•	difficulties in the integration of the acquired company’s departments, systems, including accounting, human resource and other administrative systems, technologies, books and records, and procedures, as well as in maintaining uniform standards, controls, including internal control over financial reporting required by the Sarbanes-Oxley Act of 2002 and related procedures and policies.

Acquisitions and licensing arrangements are inherently risky, and ultimately, if we do not complete an announced acquisition or license transaction or integrate an acquired business, or an acquired or licensed drug, drug candidate or other technology successfully and in a timely manner, we may not realize the benefits of the acquisition or license to the extent anticipated and the perception of the effectiveness of our management team and our company may suffer in the marketplace. Additionally, we may later incur impairment charges related to assets acquired in any such transaction. For example, we acquired or licensed several drug candidates for the treatment of HCV infection, but due to adverse clinical data regarding these drug candidates and competitive pressures, we incurred significant costs and impairment charges but did not realize the expected benefits from these transactions. In addition, even if we achieve the long-term benefits associated with strategic transactions, our expenses and short-term costs may increase materially and adversely affect our liquidity and short-term net income (loss). Future licenses or acquisitions could result in potentially dilutive issuances of equity securities, the incurrence of debt, the creation of contingent liabilities, impairment expenses related to goodwill, and impairment or amortization expenses related to other intangible assets, which could harm our financial condition.

We face risks in connection with existing and future collaborations with respect to the development, manufacture and commercialization of our products and drug candidates.

The risks that we face in connection with our current collaborations, including with Parion, CRISPR, Merck KGaA, Moderna and Janssen Inc. and any future collaborations include the following:

•

Our collaborators may change the focus of their development and commercialization efforts or may have insufficient resources to effectively develop our drug candidates. The ability of some of our products and drug candidates to reach their potential could be limited if collaborators decrease or fail to increase development or commercialization efforts related to those products or drug candidates. Our collaboration agreements provide our collaborators with a level of discretion in determining the amount and timing of efforts and resources that they will apply to these collaborations.


•	Any future collaboration agreements may have the effect of limiting the areas of research and development that we may pursue, either alone or in collaboration with third parties.


•	Collaborators may develop and commercialize, either alone or with others, drugs that are similar to or competitive with the drugs or drug candidates that are the subject of their collaborations with us.

•

Disagreements with collaborators, including disagreements over proprietary rights, contract interpretation or the preferred course of development, might cause delays or termination of the research, development or commercialization of drug candidates, might lead to additional responsibilities for us with respect to drug candidates, or might result in litigation or arbitration. Any such disagreements would divert management attention and resources and be time-consuming and expensive.


•	Collaborators may not properly maintain or defend our intellectual property rights or may use our proprietary information in such a way as to invite litigation that could jeopardize or invalidate our intellectual property or proprietary information or expose us to potential litigation.


•	Collaborators may infringe the intellectual property rights of third parties, which may expose us to litigation and potential liability.


•	Investigations and/or compliance or enforcement actions against a collaborator, which may expose us to indirect liability as a result of our partnership with such collaborator.


•	Our collaboration agreements are subject to termination under various circumstances.

Additionally, if a collaborator were to be involved in a business combination, it might deemphasize or terminate the development or commercialization of any drug candidate licensed to it by us. If one of our collaborators terminates its agreement with us, we may find it more difficult to attract new collaborators and our perception in the business and financial communities could be harmed.

We may not be able to attract collaborators or external funding for the development and commercialization of certain of our drug candidates.

As part of our ongoing strategy, we may seek additional collaborative arrangements or external funding for certain of our development programs and/or seek to expand existing collaborations to cover additional commercialization and/or development activities. We have a number of research programs and early-stage clinical development programs, some of which are being developed in collaboration with a third party. For example, in January 2017, we granted Merck KGaA an exclusive worldwide license to research, develop and commercialize four of our oncology research and development programs. At any time, we may determine that in order to continue development of a drug candidate or program or successfully commercialize a drug we need to identify a collaborator or amend or expand an existing collaboration. Whether we reach a definitive agreement for a collaboration will depend, among other things, upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s evaluation of a number of factors. Those factors may include the design or results of clinical trials, the likelihood of approval by the FDA or similar regulatory authorities outside the United States, the potential market for the subject drug candidate, the costs and complexities of manufacturing and delivering such drug candidate to patients, the potential of competing products, the existence of uncertainty with respect to our ownership of the applicable intellectual property, which can exist if there is a challenge to such ownership without regard to the merits of the challenge, and industry and market conditions generally. Potentially, and depending on the circumstances, we may desire that a collaborator either agree to fund portions of a drug development program led by us, or agree to provide all of the funding and directly lead the development and commercialization of a program. No assurance can be given that any efforts we make to seek additional collaborative arrangements will be successfully completed on a timely basis or at all. If we elect to fund and undertake development or commercialization activities on our own, we may need to obtain additional expertise and additional capital, which may not be available to us on acceptable terms or at all. If we are unable to enter into acceptable collaborative relationships, one or more of our development programs could be delayed or terminated and the possibility of our receiving a return on our investment in the program could be impaired.

Risks Related to Third-Party Manufacturing and Reliance on Third Parties

We depend on third-party manufacturers to manufacture our products and the materials we require for our clinical trials. We may not be able to maintain these relationships and could experience supply disruptions outside of our control.

We rely on a worldwide network of third-party manufacturers and in rare circumstances, compounders, to manufacture some of our drugs for commercial use and our drug candidates for clinical trials. As a result of our reliance on these third-party manufacturers and suppliers, we could be subject to significant supply disruptions outside of our control. Our supply chain for sourcing raw materials and manufacturing drug product ready for distribution is a multi-step international endeavor. Third-party contract manufacturers, including some in China, supply us with raw materials, and convert these raw materials into drug substance and convert the drug substance into final dosage form. Establishing and managing this global supply chain requires a significant financial commitment and the creation and maintenance of numerous third-party contractual relationships. Although we attempt to manage the business relationships with companies in our supply chain, we do not have control over their operations. Supply disruptions may result from a number of factors, including shortages in product raw materials, labor or technical difficulties, regulatory inspections or restrictions, shipping or customs delays or any other performance failure by any third-party manufacturer on which we rely. Any supply disruptions could disrupt sales of our products and/or the timing of our clinical trials.

We require a supply of ivacaftor and lumacaftor for commercial sale (as KALYDECO and/or ORKAMBI). We also require a supply of our drug candidates for use in our clinical trials. We obtain ivacaftor and lumacaftor (and the combinations thereof) to meet our commercial and clinical supply needs through a third-party manufacturing network. Our supply chain includes a single-source manufacturer for (i) one step in the ivacaftor manufacturing process and (ii) the manufacture of the oral granule formulation of KALYDECO that is used for patients with CF two to five years of age. As a result, if these manufacturers become unable or unwilling to continue manufacturing product on our behalf and we are not able to promptly identify another manufacturer, we would experience a disruption in the commercial supply of ORKAMBI and/or KALYDECO, which would have a significant effect on patients, our business and our product revenues. Similarly, a disruption in the clinical supply of drug products could delay the completion of clinical trials and affect timelines for regulatory filings. There can be no assurance that we will be able to establish and maintain secondary manufacturers for all of our ivacaftor or lumacaftor supply needs on a timely basis or at all.

In the course of providing its services, a contract manufacturer may develop process technology related to the manufacture of our products or drug candidates that the manufacturer owns, either independently or jointly with us. This would increase our reliance on that manufacturer or require us to obtain a license from that manufacturer in order to have our products or drug candidates manufactured by other suppliers utilizing the same process.

We rely on third parties to conduct certain pre-clinical work and clinical trials, and those third parties may not perform satisfactorily, including failing to meet established deadlines for the completion of such studies and/or trials or failing to satisfy regulatory requirements.

We rely on third parties such as contract research organizations to help manage certain pre-clinical work and our clinical trials and on medical institutions, clinical investigators and clinical research organizations such as the Therapeutic Development Network, which is primarily funded by the CFFT, to assist in the design and review of, and to conduct our clinical trials, including enrolling qualified patients. Our reliance on these third parties for clinical development activities reduces our control over these activities but does not relieve us of our responsibilities. For example, we remain responsible for ensuring that each of our clinical trials is conducted in accordance with the general investigational plan and protocols for the clinical trial. Moreover, the FDA requires us to comply with standards, commonly referred to as good laboratory practices and good clinical practices for conducting, recording and reporting the results of pre-clinical and clinical trials to assure that data and reported results are credible and accurate and that the rights, integrity and confidentiality of trial participants are protected. If these third parties do not successfully carry out their contractual duties or meet expected deadlines, we may be required to replace them. Although we believe that there are a number of other third-party contractors we could engage to continue these activities, it may result in a delay of the affected clinical trial or drug development program. If clinical trials are not conducted in accordance with our contractual expectations or regulatory requirements, action by regulatory authorities might significantly and adversely affect the conduct or progress of these clinical trials or in specific circumstances might result in a requirement that a clinical trial be redone. Accordingly, our efforts to obtain regulatory approvals for and commercialize our drug candidates could be delayed.

Risks Related to Intellectual Property

If our patents do not protect our drugs or our drugs infringe third-party patents, we could be subject to litigation and substantial liabilities.

We have numerous issued patents and pending patent applications in the United States, as well as counterparts in other countries. Our success will depend, in significant part, on our ability to obtain and defend U.S. and foreign patents covering our drugs, their uses and our processes, to preserve our trade secrets and to operate without infringing the proprietary rights of third parties. We cannot be certain that any patents will issue from our pending patent applications or, even if patents issue or have issued, that the issued claims will provide us with adequate protection against competitive products or otherwise be commercially valuable.

Due to evolving legal standards relating to the patentability, validity and enforceability of patents covering pharmaceutical inventions and the scope of claims made under these patents, our ability to obtain, maintain and enforce patents is uncertain and involves complex legal and factual questions. Recent patent reform legislation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents in the U.S. The Leahy-Smith America Invents Act, or the Leahy-Smith Act, includes a number of significant changes to United States patent law. These include provisions that affect the way patent applications are prosecuted and may also affect patent litigation. The United States Patent Office developed new regulations and procedures to govern administration of the Leahy-Smith Act, and many of the substantive changes to patent law associated with the Leahy-Smith Act, and in particular, the first to file provisions, became effective in March 2013. The first to file provisions limit the rights of an inventor who is the first to invent an invention but is not the first to file an application claiming that invention. U.S. and foreign patent applications typically are maintained in confidence for a period of time after they initially are filed with the applicable patent office. Consequently, we cannot be certain that we were the first to invent, or the first to file patent applications on, our products or drug candidates or their use. If a third party also has filed a U.S. patent application relating to our drugs or drug candidates, their uses, or a similar invention, we may have to participate in legal or administrative proceedings to determine priority of invention. For applications governed by the Lahey-Smith Act, if a third-party has an earlier filed U.S. patent application relating to our drugs or drug candidates, their uses, or a similar invention, we may be unable to obtain an issued patent from our application.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability. Our patents may be challenged by third parties, resulting in the patent being deemed invalid, unenforceable or narrowed in scope, or the third party may circumvent any such issued patents. Also, our pending patent applications may not issue, and we may not receive any additional patents. Our patents might not contain claims that are sufficiently broad to prevent others from utilizing our technologies. For instance, the issued patents relating to our drugs or drug candidates may be limited to a particular molecule or molecules and may not cover similar molecules that have similar clinical properties. Consequently, our competitors may independently develop competing products that do not infringe our patents or other intellectual property. In addition, if the breadth or strength of protection provided by our patents and patent applications is threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future products.

The laws of many foreign jurisdictions do not protect intellectual property rights to the same extent as in the United States and many companies in our segment of the pharmaceutical industry have encountered significant difficulties in protecting and defending such rights in foreign jurisdictions. If we encounter such difficulties in protecting or are otherwise precluded from effectively protecting our intellectual property rights in foreign jurisdictions, our business could be substantially harmed.

Because of the extensive time required for the discovery, development, testing and regulatory review of drug candidates, it is possible that, a patent may expire before a drug candidate can be commercialized, or a patent may expire or remain in force for only a short period following commercialization of such drug candidate resulting in a minimal, if any, period of patent exclusivity. To the extent our drug candidates are not commercialized significantly ahead of the expiration date of any applicable patent, or to the extent we have no patent protection on such drug candidates, then, to the extent available we would rely on other forms of exclusivity, such as regulatory exclusivity provided by the FDCA and its counterpart agencies in various jurisdictions, and/or orphan drug exclusivity.

Uncertainty over intellectual property in the pharmaceutical and biotechnology industry has been the source of litigation and other disputes, which is inherently costly and unpredictable.

There is considerable uncertainty within our industry about the validity, scope and enforceability of many issued patents in the United States and elsewhere in the world, and, to date, the law and practice remains in substantial flux both in the agencies that grant patents and in the courts. We cannot currently determine the ultimate scope and validity of patents which may be granted to third parties in the future or which patents might be asserted as being infringed by the manufacture, use and sale of our products.

There has been, and we expect that there may continue to be, significant litigation in the industry regarding patents and other intellectual property rights. Litigation, arbitrations, administrative proceedings and other legal actions with private parties and governmental authorities concerning patents and other intellectual property rights may be protracted, expensive and distracting to management. Competitors may sue us as a way of delaying the introduction of our drugs or to remove our drugs from the market. Any litigation, including litigation related to Abbreviated New Drug Applications, or ANDA, litigation related to 505(b)(2) applications, interference proceedings to determine priority of inventions, derivations proceedings, inter partes review, oppositions to patents in foreign countries, litigation against our collaborators or similar actions, may be costly and time consuming and could harm our business. We expect that litigation may be necessary in some instances to determine the validity and scope of certain of our proprietary rights. Litigation may be necessary in other instances to determine the validity, scope or non-infringement of certain patent rights claimed by third parties to be pertinent to the manufacture, use or sale of our products. Ultimately, the outcome of such litigation could adversely affect the validity and scope of our patent or other proprietary rights, hinder our ability to manufacture and market our products, or result in the assessment of significant monetary damages against us that may exceed amounts, if any, accrued in our financial statements.

To the extent that valid present or future third-party patents or other intellectual property rights cover our drugs, drug candidates or technologies, we or our strategic collaborators may seek licenses or other agreements from the holders of such rights in order to avoid or settle legal claims. Such licenses may not be available on acceptable terms, which may hinder our ability to, or prevent us from being able to, manufacture and market our drugs. Payments under any licenses that we are able to obtain would reduce our profits derived from the covered products.

We may be subject to claims by third parties asserting that our employees or we have misappropriated their intellectual property, or claiming ownership of what we regard as our own intellectual property.

Many of our employees were previously employed at universities or other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Although we try to ensure that our employees do not use the proprietary information or know-how of others in their work for us, we may be subject to claims that these employees or we have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such employee’s former employer. Litigation may be necessary to defend against these claims.

In addition, while it is our policy to require our employees and contractors who may be involved in the development of intellectual property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who in fact develops intellectual property that we regard as our own. Our and their assignment agreements may not be self-executing or may be breached, and we may be forced to bring claims against third parties, or defend claims they may bring against us, to determine the ownership of what we regard as our intellectual property.

If we fail in prosecuting or defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel. Even if we are successful in prosecuting or defending against such claims, litigation could result in substantial costs and be a distraction to management.

Risks Related To Our Operations

Risks associated with operating in foreign countries could materially adversely affect our business.

We have expanded our international operations over the past several years in order to market ORKAMBI and KALYDECO and expand our research and development capabilities. In 2016, a significant portion of our revenues and expenses were associated with our foreign operations and we expect that portion to increase over time as we complete reimbursement discussions in Europe for ORKAMBI. New laws and industry codes in the European Union and elsewhere have expanded transparency requirements regarding payments and transfers of value as well as patient-level clinical trial

data. New laws in the European Union also have expanded protections related to personal data and provided for increased sanctions for violations. Collectively, our expansion and these new requirements are adding to our compliance costs and expose us to potential sanctions for failing to meet the enhanced safeguards and reporting demands in these jurisdictions. In addition, a significant portion of our commercial supply chain, including sourcing of raw materials and manufacturing, is located in China and the European Union. Consequently, we are, and will continue to be, subject to risks related to operating in foreign countries. Risks associated with conducting operations in foreign countries include:


•	differing regulatory requirements for drug approvals and regulation of approved drugs in foreign countries;


•	varying reimbursement regimes and difficulties or the inability to obtain reimbursement for our products in a timely manner;


•	differing patient treatment infrastructures, particularly since our business is focused on the treatment of rare diseases that are typically prescribed by specialist physicians;


•	collectibility of accounts receivable;


•	changes in tariffs, trade barriers and regulatory requirements, the risks of which appear to have increased in the current political environment;


•	economic weakness, including recession and inflation, or political instability in particular foreign economies and markets;


•	differing levels of enforcement and/or recognition of contractual and intellectual property rights;


•	complying with local laws and regulations, which are interpreted and enforced differently across jurisdictions and which can change significantly over time;


•	foreign taxes, including withholding of payroll taxes;


•	foreign currency fluctuations, which could result in reduced revenues or increased operating expenses, and other obligations incident to doing business or operating in another country;


•	workforce uncertainty in countries where labor unrest is more common than in the United States;


•	import and export licensing requirements, tariffs, and other trade and travel restrictions;


•	production shortages resulting from any events affecting raw material supply or manufacturing capabilities abroad; and


•	business interruptions resulting from geo-political actions, including war and terrorism.

Our revenues are subject to foreign exchange rate fluctuations due to the global nature of our operations. Although we have foreign currency forward contracts to hedge forecasted product revenues denominated in foreign currencies, our efforts to reduce currency exchange losses may not be successful. As a result, currency fluctuations among our reporting currency, the U.S. dollar, and the currencies in which we do business will affect our operating results, often in unpredictable ways.

In addition, our international operations are subject to regulation under U.S. law. For example, the Foreign Corrupt Practices Act prohibits U.S. companies and their representatives from offering, promising, authorizing or making payments to foreign officials for the purpose of obtaining or retaining business abroad. In many countries, the health care professionals we regularly interact with may meet the definition of a foreign government official for purposes of the Foreign Corrupt Practices Act. We also are subject to import/export control laws. Failure to comply with domestic or foreign laws could result in various adverse consequences, including the possible delay in approval or refusal to approve a product, recalls, seizures, withdrawal of an approved product from the market, the imposition of civil or criminal sanctions, the prosecution of executives overseeing our international operations and corresponding bad publicity and negative perception of our company in foreign countries.

If we fail to manage our operations effectively, our business may suffer.

We have expanded and are continuing to expand our global operations and capabilities, which has placed, and will continue to place, significant demands on our management and our operational, research and development and financial infrastructure. To effectively manage our business, we need to:


•	implement and clearly communicate our corporate-wide strategies;


•	enhance our operational and financial infrastructure, including our controls over records and information;


•	enhance our operational, financial and management processes, including our cross-functional decision-making processes and our budget prioritization systems;


•	train and manage our global employee base;


•	transition from a U.S.-centric company into an organization capable of developing and commercializing multiple drug candidates in international markets; and


•	enhance our compliance and legal resources.

Risk Relating to the Referendum of the United Kingdom’s Membership of the European Union.

Our European headquarters and European research facility are located in the United Kingdom, and a significant portion of our ex-U.S. net product revenues are derived from sales in the United Kingdom. In June 2016, the United Kingdom, or the U.K., held a referendum in which voters approved an exit from the European Union commonly referred to as “Brexit.” It is expected that the U.K. government will provide official notice in the first half of 2017, and after notice is provided the parties will negotiate the terms of the U.K.’s withdrawal from the European Union. The withdrawal could, among other outcomes, disrupt the free movement of goods, services and people between the U.K. and the E.U., undermine bilateral cooperation in key policy areas and significantly disrupt trade between the U.K. and the E.U. In addition, Brexit could lead to legal uncertainty and potentially divergent national laws and regulations as the U.K. determines which E.U. laws to replace or replicate. Given the lack of comparable precedent, it is unclear what financial, trade, regulatory and legal implications the withdrawal of the U.K. from the E.U. would have and how such withdrawal would affect us. The announcement of Brexit caused significant volatility in global stock markets and currency exchange rate fluctuations that resulted in the strengthening of the U.S. dollar against foreign currencies in which we conduct business. The announcement of Brexit and the withdrawal of the U.K. from the E.U. may also create global economic uncertainty, which may cause third-party payors, including governmental organizations, to closely monitor their costs and reduce their spending budgets. Any of these effects of Brexit, among others, could adversely affect our business, financial condition and operating results.

Our business has a substantial risk of product liability claims and other litigation liability. If we do not obtain appropriate levels of insurance, any potential claims could adversely affect our business.

We are or may be involved in various legal proceedings, including securities class action lawsuits and claims related to product liability, intellectual property and breach of contract. Such proceedings may involve claims for, or the possibility of, fines and penalties involving substantial amounts of money or other relief, including but not limited to civil or criminal fines and penalties. If any of these legal proceedings were to result in an adverse outcome, it could have a material adverse effect on our business.

With respect to product liability and clinical trial risks, in the ordinary course of business we are subject to liability claims and lawsuits, including potential class actions, alleging that our products or drug candidates have caused, or could cause, serious adverse events or other injury. We have product liability insurance and clinical trial insurance in amounts that we believe are adequate to cover this risk. However, our insurance may not provide adequate coverage against all potential liabilities. If a claim is brought against us, we might be required to pay legal and other expenses to defend the claim, as well as pay uncovered damage awards resulting from a claim brought successfully against us and these damages could be significant and have a material adverse effect on our financial condition. Furthermore, whether or not we are ultimately successful in defending any such claims, we might be required to direct significant financial and managerial resources to such defense and adverse publicity is likely to result.

A breakdown or breach of our information technology systems could subject us to liability or interrupt the operation of our business.

We maintain and rely extensively on information technology systems and network infrastructures for the effective operation of our business. In the course of our business, we collect, store and transmit confidential information (including personal information and intellectual property), and it is critical that we do so in a secure manner to maintain the confidentiality and integrity of such confidential information. The size and complexity of our information technology and information security systems makes such systems potentially vulnerable to service interruptions or to security breaches. A disruption, infiltration or failure of our information technology systems or any of our data centers as a result of software or hardware malfunctions, computer viruses, cyber attacks, employee theft or misuse, power disruptions, natural disasters, floods or accidents could cause breaches of data security and loss of critical data, which in turn could materially adversely affect our business and subject us to both private and governmental causes of action. While we have implemented security measures in an attempt to minimize these risks to our data and information technology systems and have adopted a business continuity plan to deal with a disruption to our information technology systems, there can be no assurance that our efforts will prevent breakdowns or breaches in our systems that could adversely affect our business.

If we fail to attract and retain skilled employees, our business could be materially harmed.

Because our drug discovery and development activities are highly technical in nature, we require the services of highly qualified and trained scientists who have the skills necessary to conduct these activities. In addition, we need to attract and retain employees with experience in marketing and commercialization of medicines. We face intense competition for our personnel from our competitors and other companies throughout our industry. We also experience competition for the hiring of scientific and clinical personnel from universities and research institutions. Moreover, the growth of local biotechnology companies and the expansion of major pharmaceutical companies into the Boston area have increased competition for the available pool of skilled employees, especially in technical fields, and the high cost of living in Massachusetts makes it difficult to attract employees from other parts of the country to Massachusetts. In addition, the available pool of skilled employees would be further reduced if immigration laws change in a manner that increases restrictions on immigration. Our ability to commercialize our products, and achieve our research and development objectives, depends on our ability to respond effectively to these demands. If we are unable to hire and retain qualified personnel, there could be a material adverse effect on our business.

The loss of the services of key employees or the failure to effectively integrate key employees could negatively affect our business.

Our future success will depend in large part on our ability to retain the services of our key scientific and management personnel and to integrate new scientific and management personnel into our business. A loss of key personnel or a failure to properly integrate new personnel could be disruptive. We have entered into employment agreements with some executives and provide compensation-related benefits to all of our key employees that vest over time and therefore induce them to remain with us. However, the employment agreements can be terminated by the executive on relatively short notice. The value to employees of stock-related benefits that vest over time—such as options, restricted stock and restricted stock units—is significantly affected by movements in our stock price, and may at any point in time be insufficient to counteract more lucrative offers from other companies. A failure to retain, as well as hire, train and effectively integrate into our organization a sufficient number of qualified scientists, professionals, sales personnel and senior management would negatively affect our business.

If we do not comply with laws regulating the protection of the environment and health and human safety, our business could be adversely affected.

Our research and development efforts involve the regulated use of hazardous materials, chemicals and various controlled and radioactive compounds. Although we believe that our safety procedures for handling and disposing of these materials comply with the standards prescribed by state, federal and foreign regulations, the risk of loss of, or accidental contamination or injury from, these materials cannot be eliminated. If an accident occurs, we could be held liable for resulting damages, which could be substantial. We also are subject to numerous environmental, health and workplace safety laws and regulations, including those governing laboratory procedures, exposure to blood-borne pathogens and the handling of biohazardous materials. Although we maintain workers’ compensation insurance to cover us for costs we may incur due to injuries to our employees resulting from the use of these materials, this insurance may not provide adequate coverage against potential liabilities. We maintain insurance to cover pollution conditions or other extraordinary or unanticipated events

relating to our use and disposal of hazardous materials that we believe is appropriate based on the small amount of hazardous materials we generate. Additional federal, state and local laws and regulations affecting our operations may be adopted in the future. We may incur substantial costs to comply with, and substantial fines or penalties if we violate, any of these laws or regulations.

If our facilities were to experience a catastrophic loss, our operations would be seriously harmed.

Most of our operations, including our research and development activities, are conducted in a limited number of facilities. If any of our major facilities were to experience a catastrophic loss, due to a fire, earthquake or similar event, our operations could be seriously harmed. For example, our corporate headquarters, as well as additional leased space that we use for certain logistical and laboratory operations and manufacturing, are located in a flood zone along the Massachusetts coast. We have adopted a business continuity plan to address most crises. However, if we are unable to fully implement our disaster recovery plans, we may experience delays in recovery of data and/or an inability to perform vital corporate functions, which could result in a significant disruption in our research, development, manufacturing and/or commercial activities, the loss or critical data and/or large expenses to repair or replace the facility, which would have a material adverse effect on our business.

Risks Related to Holding Our Common Stock

Our stock price may fluctuate.

Market prices for securities of companies such as ours are highly volatile. From January 1, 2016 to December 31, 2016, our common stock traded between $71.46 and $124.96 per share. The market for our stock, like that of other companies in the biotechnology industry, has experienced significant price and volume fluctuations. The future market price of our securities could be significantly and adversely affected by factors such as:


•	the information contained in our quarterly earnings releases, including our net product revenues and operating expenses for completed periods and guidance regarding future periods;


•	announcements of FDA actions with respect to our drugs or our competitors’ drugs, or regulatory filings for our drug candidates or those of our competitors, or announcements of interim or final results of clinical trials or nonclinical studies relating to our drugs, drug candidates or those of our competitors;


•	prescription data and other information disclosed by third parties regarding our business or products;


•	technological innovations or the introduction of new drugs by our competitors;


•	government regulatory action;


•	public concern as to the safety of drugs developed by us or our competitors;


•	developments in patent or other intellectual property rights or announcements relating to these matters;


•	developments in domestic and international governmental policy or regulation, for example, relating to intellectual property rights;


•	developments relating specifically to other companies and market conditions for pharmaceutical and biotechnology stocks or stocks in general;


•	business development, capital structuring or financing activities; and


•	general worldwide or national economic, political and capital market conditions.

Following periods of volatility in the market price of a company's securities, stockholder derivative lawsuits and securities class action litigation are common. Such litigation, if instituted against us or our officers and directors, could result in substantial costs and a diversion of management's attention and resources.

Our indebtedness could materially and adversely affect our financial condition, and the terms of our credit agreement impose restrictions on our business, reducing our operational flexibility and creating default risks.

In October 2016, we entered into a credit agreement providing for a $500 million revolving facility, $300 million of which was drawn at closing. All outstanding borrowings under the credit agreement mature on October 13, 2021. Our indebtedness could have important consequences to our business, including increasing our vulnerability to general adverse financial, business, economic and industry conditions, as well as other factors that are beyond our control. The credit agreement requires that we comply with certain financial covenants, including (i) a consolidated leverage ratio covenant and (ii) a consolidated EBITDA covenant, in each case to be measured on a quarterly basis. Further, the credit agreement includes negative covenants, subject to exceptions, restricting or limiting our ability and the ability of our subsidiaries to, among other things, incur additional indebtedness, grant liens, engage in certain investment, acquisition and disposition transactions, pay dividends, repurchase capital stock and enter into transactions with affiliates. As a result, we may be restricted from engaging in business activities that may otherwise improve our business. Failure to comply with the covenants could result in an event of default that could trigger acceleration of our indebtedness, which would require us to repay all amounts owing under the credit agreement and/or our capital leases and could have a material adverse effect on our business. Additionally, our obligations under the credit agreement are unconditionally guaranteed by certain of our domestic subsidiaries. All obligations under the credit agreement, and the guarantees of those obligations, are secured by substantially all of our assets and the assets of all guarantors (excluding intellectual property, owned and leased real property and certain other excluded property), including the pledge of all or a portion of the equity interests of certain of our subsidiaries. If we fail to satisfy our obligations under the credit agreement or are unable to obtain sufficient funds to make payments, the lenders could foreclose on our pledged collateral.

Our quarterly operating results are subject to significant fluctuation.

Our operating results have fluctuated from quarter to quarter in the past, and we expect that they will continue to do so in the future. Our revenues are primarily dependent on the level of net product revenues from sales of ORKAMBI and KALYDECO and our total net product revenues could vary on a quarterly basis. Our total net product revenues may be affected by, among other factors, the timing of orders from our significant customers. Additional factors that have caused quarterly fluctuations in recent years include variable amounts of revenues, impairment charges, charges for excess and obsolete inventories, changes in the fair value of derivative instruments and the consolidation or deconsolidation of variable interest entities. Our revenues also are subject to foreign exchange rate fluctuations due to the global nature of our operations. Although we have foreign currency forward contracts to hedge forecasted product revenues denominated in foreign currencies, our efforts to reduce currency exchange losses may not be successful. As a result, currency fluctuations among our reporting currency, the U.S. dollar, and the currencies in which we do business may affect our operating results, often in unpredictable ways. Our quarterly results also could be materially affected by significant charges, which may or may not be similar to charges we have experienced in the past. Most of our operating expenses relate to our research and development activities, do not vary directly with the amount of revenues and are difficult to adjust in the short term. As a result, if revenues in a particular quarter are below expectations, we are unlikely to reduce operating expenses proportionately for that quarter. These examples are only illustrative and other risks, including those discussed in these “Risk Factors,” could also cause fluctuations in our reported financial results. Our operating results during any one period do not necessarily suggest the results of future periods.

We expect that results from our clinical development activities and the clinical development activities of our competitors will continue to be released periodically, and may result in significant volatility in the price of our common stock.

Any new information regarding our products and drug candidates or competitive products or potentially competitive drug candidates can substantially affect investors’ perceptions regarding our future prospects. We, our collaborators and our competitors periodically provide updates regarding drug development programs, typically through press releases, conference calls and presentations at medical conferences. These periodic updates often include interim or final results from clinical trials conducted by us or our competitors and/or information about our or our competitors’ expectations regarding regulatory filings and submissions as well as future clinical development of our products or drug candidates, competitive products or potentially competitive drug candidates. The timing of the release of information by us regarding our drug development programs is often beyond our control and is influenced by the timing of receipt of data from our clinical trials and by the general preference among pharmaceutical companies to disclose clinical data during medical conferences. In addition, the information disclosed about our clinical trials, or our competitors’ clinical trials, may be based on interim rather than final data that may involve interpretation difficulties and may in any event not accurately predict final results.

We could be negatively affected by government investigations.

In the third quarter of 2015, we received a subpoena from the United States Department of Justice related to our marketed medicines. This subpoena requested documents relating primarily to our Good Laboratory Practices in a bioanalytical laboratory. We have responded to the subpoena. If this matter is not resolved in a satisfactory manner, our business could be adversely affected.

Changes in tax laws, regulations and treaties could affect our future taxable income.

A change in tax laws, treaties or regulations, or their interpretation, of any country in which we operate could materially affect us if we generate taxable income in a future period. We continue to assess the impact of various tax reform proposals and modifications to existing tax treaties in all jurisdictions where we have operations to determine the potential effect on our business and any assumptions we have made about our future taxable income. We cannot predict whether any specific proposals will be enacted, the terms of any such proposals or what effect, if any, such proposals would have on our business if they were to be enacted.

We may need to raise additional capital that may not be available.

We have a history of operating losses and may in the future need to raise additional capital. In recent periods, we also have received significant proceeds from the issuance of common stock under our employee benefit plans, but we received limited proceeds from employee benefit plans in 2016 and the amount and timing of future proceeds from employee benefits plans is uncertain. Any potential public offering, private placement or debt financing may or may not be similar to the transactions that we entered into in the past. Any debt financing may be on terms that, among other things, include conversion features that could result in dilution to our then-existing security holders and restrict our ability to pay interest and dividends—although we do not intend to pay dividends for the foreseeable future. Additionally, our pledge of specified assets as collateral to secure our obligations under our credit agreement may limit our ability to obtain additional debt financing. Any equity financings would result in dilution to our then-existing security holders. If adequate funds are not available on acceptable terms, or at all, we may be required to curtail significantly or discontinue one or more of our research, drug discovery or development programs, including clinical trials, incur significant cash exit costs, or attempt to obtain funds through arrangements with collaborators or others that may require us to relinquish rights to certain of our technologies, drugs or drug candidates. Based on many factors, including general economic conditions, additional financing may not be available on acceptable terms, if at all.

Issuances of additional shares of our common stock could cause the price of our common stock to decline.

As of December 31, 2016, we had 248.3 million shares of common stock issued and outstanding. As of December 31, 2016, we also had outstanding options to purchase 12.6 million shares of common stock with a weighted-average exercise price of $81.41 per share. Outstanding vested options are likely to be exercised if the market price of our common stock exceeds the applicable exercise price, and, in the future, we expect to issue additional options, restricted stock and restricted stock units to directors and employees. In addition, we may issue additional common stock or restricted securities in the future as part of financing activities or business development activities and any such issuances may have a dilutive effect on our then-existing shareholders. Sales of substantial amounts of our common stock in the open market, or the availability of such shares for sale, could adversely affect the price of our common stock. The issuance of restricted common stock or common stock upon exercise of any outstanding options would be dilutive, and may cause the market price for a share of our common stock to decline.

We have adopted anti-takeover provisions and are subject to Massachusetts corporate laws that may frustrate any attempt to remove or replace our current management or effectuate a business combination involving Vertex.

Our corporate charter and by-law provisions and Massachusetts state laws may discourage certain types of transactions involving an actual or potential change of control of Vertex that might be beneficial to us or our security holders. Our charter provides for staggered terms for the members of the Board of Directors. Our by-laws grant the directors a right to adjourn annual meetings of shareholders, and certain provisions of our by-laws may be amended only with an 80% shareholder vote. We may issue shares of any class or series of preferred stock in the future without shareholder approval and upon such terms as our Board of Directors may determine. The rights of the holders of common stock will be subject to, and may be adversely affected by, the rights of the holders of any class or series of preferred stock that may be issued in the future. Massachusetts state law prohibits us from engaging in specified business combinations, unless the combination is approved or consummated in a prescribed manner, and prohibits voting by any shareholder who acquires 20% or more of our voting

stock without shareholder approval. As a result, shareholders or other parties may find it more difficult to remove or replace our current management. Additionally, one of our collaboration agreements includes a change in control provision that could reduce the potential acquisition price an acquirer is willing to pay or discourage a takeover attempt that may otherwise be viewed as beneficial to shareholders.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K and, in particular, the description of our Business set forth in Item 1, the Risk Factors set forth in this Item 1A and our Management’s Discussion and Analysis of Financial Condition and Results of Operations set forth in Item 7 contain or incorporate a number of forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including statements regarding:


•	our expectations regarding the amount of, timing of and trends with respect to our revenues, costs and expenses and other gains and losses, including those related to net product revenues from KALYDECO and ORKAMBI;

•

our expectations regarding clinical trials, development timelines and regulatory authority filings and submissions for ivacaftor, lumacaftor, tezacaftor, VX-371, VX-440, VX-152, VX-659, VX-445, VX-150 and VX-210, as well as the MAA for ORKAMBI for patients with CF six to eleven years of age who are homozygous for the F508del mutation in their CFTR gene and the NDA for tezacaftor in combination with ivacaftor;


•	our ability to obtain reimbursement for ORKAMBI in ex-U.S. markets and our ability to otherwise successfully market ORKAMBI and KALYDECO or any of our other drug candidates for which we obtain regulatory approval;


•	our expectations regarding the timing and structure of clinical trials of our drugs and drug candidates, including ivacaftor, lumacaftor, tezacaftor, VX-371, VX-440, VX-152, VX-659, VX-445, VX-150 and VX-210, and the expected timing of our receipt of data from our ongoing and planned clinical trials;


•	the data that will be generated by ongoing and planned clinical trials and the ability to use that data to advance compounds, continue development or support regulatory filings;


•	our beliefs regarding the support provided by clinical trials and preclinical and nonclinical studies of our drug candidates for further investigation, clinical trials or potential use as a treatment;


•	our plan to continue investing in our research and development programs and our strategy to develop our drug candidates, alone or with third party-collaborators;


•	the establishment, development and maintenance of collaborative relationships;


•	potential business development activities;


•	potential fluctuations in foreign currency exchange rates;


•	our ability to use our research programs to identify and develop new drug candidates to address serious diseases and significant unmet medical needs; and


•	our liquidity and our expectations regarding the possibility of raising additional capital.

Any or all of our forward-looking statements in this Annual Report on Form 10-K may turn out to be wrong. They can be affected by inaccurate assumptions or by known or unknown risks and uncertainties. Many factors mentioned in this Annual Report on Form 10-K will be important in determining future results. Consequently, no forward-looking statement can be guaranteed. Actual future results may vary materially from expected results. We also provide a cautionary discussion of risks and uncertainties under “Risk Factors” above in this Item 1A. These are factors and uncertainties that we think could cause our actual results to differ materially from expected results. Other factors and uncertainties besides those listed there could also adversely affect us.

Without limiting the foregoing, the words “believes,” “anticipates,” “plans,” “intends,” “expects” and similar expressions are intended to identify forward-looking statements. There are a number of factors and uncertainties that could cause actual events or results to differ materially from those indicated by such forward-looking statements, many of which are beyond our control, including the factors and uncertainties set forth under “Risk Factors” above in this Item 1A. In addition, the forward-looking statements contained herein represent our estimate only as of the date of this filing and should not be relied upon as representing our estimate as of any subsequent date. While we may elect to update these forward-looking statements at some point in the future, we specifically disclaim any obligation to do so to reflect actual results, changes in assumptions or changes in other factors affecting such forward-looking statements.


ITEM 1B.	UNRESOLVED STAFF COMMENTS

We did not receive any written comments from the Securities and Exchange Commission prior to the date 180 days before the end of the fiscal year ended December 31, 2016 regarding our filings under the Securities Exchange Act of 1934, as amended, that have not been resolved.


ITEM 2.	PROPERTIES

Corporate Headquarters

We lease approximately 1.1 million square feet of office and laboratory space at our corporate headquarters in Boston, Massachusetts in two buildings pursuant to two leases that we entered into in May 2011. The leases commenced in December 2013 and will extend until December 2028. We have an option to extend the term of the leases for an additional ten years. In addition, in connection with our relocation to Boston, we entered into a lease in June 2012 for approximately 100,000 square feet of space in the Boston Marine Industrial Park, in close proximity to our corporate headquarters. We are using this additional space for certain logistical and laboratory operations and manufacturing equipment that will complement the office and laboratory facilities at our corporate headquarters.

Facility in Cambridge, Massachusetts

We currently lease approximately 290,000 square feet of laboratory and office space at our former Kendall Square facility in Cambridge, Massachusetts that will expire in 2018. We have subleased approximately 267,000 square feet of the approximately 290,000 square feet of the Kendall Square facility under subleases, each with terms ending in 2018.

Additional United States and Worldwide Locations

In addition to our facilities in Massachusetts, we lease an aggregate of approximately 300,000 square feet of space. This includes laboratory and office space to support our research and development organizations in San Diego, California and Milton Park, Abingdon, England, London, England and office space in many of the countries in which we sell our products. In addition, in December 2015, we entered into a lease for approximately 170,000 square feet of office and laboratory space under construction in San Diego, California, which will replace our existing facility in San Diego. The lease will commence upon completion of the building, scheduled for the first half of 2018, and will extend for 16 years from the commencement date.


ITEM 3.	LEGAL PROCEEDINGS

Local No. 8 IBEW Retirement Plan & Trust v. Vertex Pharmaceuticals Incorporated, et al.

On May 28, 2014, a purported shareholder class action Local No. 8 IBEW Retirement Plan & Trust v. Vertex Pharmaceuticals Incorporated, et al. was filed in the United States District Court for the District of Massachusetts, naming us and certain of our current and former officers and directors as defendants. The lawsuit alleged that we made material misrepresentations and/or omissions of material fact in our disclosures during the period from May 7, 2012 through May 29, 2012, all in violation of Section 10(b) of the Securities Exchange Act of 1934, as amended, and Rule 10b-5 promulgated thereunder. The purported class consisted of all persons (excluding defendants) who purchased our common stock between May 7, 2012 and May 29, 2012. The plaintiffs sought unspecified monetary damages, costs and attorneys’ fees as well as disgorgement of the proceeds from certain individual defendants’ sales of our stock. On October 8, 2014, the Court approved Local No. 8 IBEW Retirement Fund as lead plaintiff, and Scott and Scott LLP as lead counsel for the plaintiff and the putative class. On September 30, 2015, the court granted our motion to dismiss. On October 15, 2015, the plaintiff filed a notice of appeal. In 2016, the parties filed briefs with, and presented oral arguments to, the First Circuit Court of Appeals.

On October 3, 2016, the First Circuit Court of Appeals affirmed the district court’s dismissal of the plaintiff’s complaint. The times for petitioning the U.S. Court of Appeals for the First Circuit for an en banc rehearing as well as filing a petition for certiorari to the U.S. Supreme Court both have passed.


ITEM 4.	MINE SAFETY DISCLOSURES

Not applicable.

PART II


ITEM 5.	MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information

Our common stock is traded on The NASDAQ Global Select Market under the symbol “VRTX.” The following table sets forth for the periods indicated the high and low sale prices per share of our common stock as reported by NASDAQ Stock Market LLC:



Year Ended December 31, 2016:	High		Low
First quarter	$	124.96	$	75.90
Second quarter	96.49		75.92
Third quarter	103.73		83.50
Fourth quarter	97.93		71.46



Year Ended December 31, 2015:	High		Low
First quarter	$	136.33	$	103.75
Second quarter	137.50		113.68
Third quarter	143.45		97.45
Fourth quarter	134.71		101.49

Shareholders

As of February 10, 2017, there were 1,629 holders of record of our common stock.

Performance Graph

CUMULATIVE TOTAL RETURN

Based on Initial Investment of $100 on December 31, 2011

with dividends reinvested (fiscal years ended December 31)

We became part of the Standard & Poor’s 500 (“S&P 500^®”) Stock Index in 2013.

Dividends

We have never declared or paid any cash dividends on our common stock, and we currently expect that any future earnings will be retained for use in our business. Any future determination to declare cash dividends will be subject to the discretion of our board of directors and applicable law and will depend on various factors, including our results of operations, financial condition, prospects and any other factors deemed relevant by our board of directors. In addition, our credit agreement limits our ability to pay cash dividends on our common stock.

Issuer Repurchases of Equity Securities

The table set forth below shows all repurchases of securities by us during the three months ended December 31, 2016:



Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number of Shares that May Yet be Purchased Under the Plans or Programs
Oct. 1, 2016 to Oct. 31, 2016	23,701	$	0.01	—	—
Nov. 1, 2016 to Nov. 30, 2016	16,880	$	0.01	—	—
Dec. 1, 2016 to Dec. 31, 2016	10,946	$	0.01	—	—

The repurchases were made under the terms of our Amended and Restated 2006 Stock and Option Plan and Amended and Restated 2013 Stock and Option Plan. Under these plans, we award shares of restricted stock to our employees that typically are subject to a lapsing right of repurchase by us. We may exercise this right of repurchase if a restricted stock recipient’s service to us is terminated. If we exercise this right, we are required to repay the purchase price paid by or on behalf of the recipient for the repurchased restricted shares, which typically is the par value per share of $0.01. Repurchased shares are returned and are available for future awards under the terms of our Amended and Restated 2013 Stock and Option Plan.


ITEM 6.	SELECTED FINANCIAL DATA

The following unaudited selected consolidated financial data are derived from our audited consolidated financial statements and have been revised to reflect discontinued operations. These data should be read in conjunction with our audited consolidated financial statements and related notes that are included elsewhere in this Annual Report on Form 10-K and with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in Item 7.



	Year Ended December 31,
	2016			2015			2014			2013			2012
	(in thousands, except per share amounts)
Consolidated Statements of Operations Data:
Product revenues, net
KALYDECO product revenues, net	$	703,432		$	631,674		$	463,750		$	371,285		$	171,645
ORKAMBI product revenues, net	979,590			350,663			—			—			—
INCIVEK product revenues, net	610			17,987			24,071			466,360			1,161,813
Total product revenues, net	1,683,632			1,000,324			487,821			837,645			1,333,458
Royalty revenues	16,600			23,959			40,919			156,592			141,498
Collaborative revenues (1)	1,945			8,053			51,675			217,738			52,086
Total revenues	1,702,177			1,032,336			580,415			1,211,975			1,527,042
Total costs and expenses (2)	1,692,241			1,499,215			1,272,827			1,821,983			1,480,315
(Loss) income from continuing operations attributable to Vertex	(112,052		)	(556,334		)	(737,643		)	(503,622		)	32,271
(Loss) income from discontinued operations attributable to Vertex (3)	—			—			(912		)	58,594			(139,303		)
Net (loss) income attributable to Vertex	$	(112,052	)	$	(556,334	)	$	(738,555	)	$	(445,028	)	$	(107,032	)
Diluted (loss) income from continuing operations attributable to Vertex per common share	$	(0.46	)	$	(2.31	)	$	(3.14	)	$	(2.24	)	$	0.15
Shares used in per diluted share calculations	244,685			241,312			235,307			224,906			215,262

	As of December 31,
	2016			2015			2014			2013			2012
	(in thousands)
Consolidated Balance Sheet Data:
Cash, cash equivalents and marketable securities	$	1,434,557		$	1,042,462		$	1,387,106		$	1,465,076		$	1,321,215
Total assets	2,896,787			2,498,587			2,334,679			2,319,041			2,759,288
Total current liabilities (4)	792,537			506,167			368,254			397,829			432,624
Long-term debt obligations, excluding current portion (5)	—			223,863			280,569			—			400,000
Construction financing lease obligation, excluding current portion (6)	486,359			472,611			473,073			440,937			268,031
Other long-term obligations	279,700			202,318			116,600			123,870			424,251


(1)	In 2013, we recorded $203.4 million of collaborative revenues from Janssen NV, which were primarily attributable to a 2013 amendment to our collaboration agreement with Janssen NV. See Note B, “Collaborative Arrangements.”

(2)

Total costs and expenses included (i) in 2013 and 2012, an aggregate of $10.4 million and $133.2 million, respectively, of write-offs for excess and obsolete inventories, (ii) in 2013 and 2012, total costs and expenses included intangible asset impairment charges of $412.9 million and $105.8 million, respectively and (iii) in 2016, 2015, 2014 and 2013, $1.3 million, $2.2 million, $50.9 million and $40.5 million, respectively, of restructuring charges. See Note H, “Inventories,” Note J, “Intangible Assets and Goodwill” and Note Q, “Restructuring Expenses.”


(3)	(Loss) income from discontinued operations attributable to Vertex relates to our collaboration with Alios BioPharma, Inc., in 2012 through 2013, which we deconsolidated as of December 31, 2013. See Note B, “Collaborative Arrangements.”


(4)	In 2016, we borrowed $300.0 million pursuant to a revolving credit facility that matures in October 2021. In February 2017, we repaid the $300.0 million that was outstanding under our revolving credit facility. See Note L, “Long Term Obligations.”


(5)	In 2013, our convertible senior subordinated notes (due 2015) with an aggregate principal amount of $400.0 million were converted into common stock or redeemed. During 2016, we terminated and repaid all outstanding obligations under our term loan. See Note L, “Long Term Obligations.”


(6)	In 2011, we entered into two leases for our corporate headquarters, which we occupied in December 2013. We are deemed for accounting purposes to be the owner of the buildings. See Note L, “Long Term Obligations.”


ITEM 7.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

We are in the business of discovering, developing, manufacturing and commercializing medicines for serious diseases. We use precision medicine approaches with the goal of creating transformative medicines for patients in specialty markets. Our business is focused on developing and commercializing therapies for the treatment of cystic fibrosis, or CF, and advancing our research and development programs in other indications, while maintaining our financial strength. Our two marketed products are ORKAMBI (lumacaftor in combination with ivacaftor) and KALYDECO (ivacaftor).

Our total net product revenues were $1.7 billion in 2016, an increase of 68% over net product revenues of $1.0 billion in 2015, primarily due to increased ORKAMBI net product revenues, which commenced in the third quarter of 2015, and an increase in KALYDECO net product revenues. We expect our net income (loss) and total net product revenues in 2017 will be largely dependent on the level of ORKAMBI net product revenues.

Cystic Fibrosis

ORKAMBI and KALYDECO are approved to treat approximately 40% of the 75,000 CF patients in North America, Europe, Australia and Canada. ORKAMBI (lumacaftor in combination with ivacaftor) is approved as a treatment for approximately 25,000 patients who have two copies (homozygous) of the F508del mutation in their cystic fibrosis transmembrane conductance regulator, or CFTR, gene. KALYDECO (ivacaftor) is approved for the treatment of approximately 4,000 CF patients who have the G551D mutation or other specified mutations in their CFTR gene. Our goal is to develop treatment regimens that will provide benefits to as many patients with CF as possible and will enhance the benefits that currently are being provided to patients taking our medicines.

CF Development Programs

We have multiple development programs in the field of CF, including:

•


•	VX-152, VX-440, VX-659 and VX-445 are next-generation CFTR corrector compounds that we are evaluating as part of combination treatment regimens. We have initiated Phase 2 clinical trials of VX-152 and VX-440 and expect data from these clinical trials in the second half of 2017. We have initiated Phase 1 clinical trials of VX-659 and VX-445.


•	VX-371, an investigational epithelial sodium channel, or ENaC, inhibitor, is being evaluated in a Phase 2 development program and which we exclusively licensed from Parion Sciences, Inc., or Parion, in 2015.

Research and Development

We are engaged in a number of other research and mid- and early-stage development programs, including in the areas of pain and neurology. We have also entered into third-party collaborations pursuant to which we are engaged in the discovery and development of nucleic acid-based therapies for a variety of diseases, including CF. We plan to continue investing in our research programs and fostering scientific innovation in order to identify and develop transformative medicines. Our current research programs include programs targeting cystic fibrosis, adrenoleukodystrophy, alpha-1 antritrypsin deficiency, sickle cell disease and polycystic kidney disease. We believe that pursuing research in diverse areas allows us to balance the risks inherent in drug development and may provide drug candidates that will form our pipeline in future years.

Collaboration Arrangements

We have entered into collaborations with biotechnology and pharmaceutical companies in order to acquire rights or to license drug candidates or technologies that enhance our pipeline and/or our research capabilities. Over the last several years, we entered into collaboration agreements with:


•	CRISPR Therapeutics AG, or CRISPR, pursuant to which we are collaborating on the discovery and development of potential new treatments aimed at the underlying genetic causes of human diseases using CRISPR-Cas9 gene editing technology;


•	Parion Sciences, Inc., or Parion, pursuant to which we are developing epithelial sodium channel, or ENaC, inhibitors for the treatment of pulmonary diseases;


•	Moderna Therapeutics, Inc., or Moderna, pursuant to which we are seeking to identify and develop mRNA therapeutics for the treatment of CF; and


•	BioAxone Biosciences, Inc., or BioAxone, pursuant to which we are evaluating VX-210 as a potential treatment for patients who have spinal cord injuries.

Generally, when we in-license a technology or drug candidate, we make upfront payments to the collaborator, assume the costs of the program and agree to make contingent payments, which could consist of milestone, royalty and option payments. Depending on many factors, including the structure of the collaboration, the significance of the drug candidate that we license to the collaborator’s operations and the other activities in which our collaborators are engaged, the accounting for these transactions can vary significantly. For example, the upfront payments and expenses incurred in connection with our CRISPR and Moderna collaborations are being expensed as research expenses because the collaboration represents a small portion of these collaborators overall business. CRISPR and Moderna’s activities unrelated to our collaborations have no effect on our consolidated financial statements. Parion and BioAxone are being accounted for as variable interest entities, or VIEs, and are included in our consolidated financial statements due to (i) the significance of the respective licensed programs to Parion and BioAxone as a whole, (ii) our power to control the significant activities under each collaboration and (iii) our obligation to absorb losses and right to receive benefits that potentially could be significant. Each of our consolidated VIEs are engaging in activities unrelated to our collaboration, including in the case of Parion, seeking to develop novel treatments for pulmonary and ocular diseases. The revenues and expenses unrelated to the programs we in-license from our VIEs are immaterial to our consolidated financial statements. In each case, the activities unrelated to our collaboration represent less than 1% of our total revenues and total expenses. Because we consolidate our VIEs, we evaluate the fair value of the contingent payments payable by us on a quarterly basis. Changes in the fair value of these contingent future payments affect net income attributable to Vertex on a dollar-for-dollar basis, with increases in the fair value of contingent payments payable by us to a VIE resulting in a decrease in net income attributable to Vertex (or an increase in net loss attributable to Vertex) and decreases in the fair value of contingent payments payable by us to a VIE resulting in an increase in net income attributable to Vertex (or decrease in net loss attributable to Vertex). For additional information regarding our VIEs see Note B “Collaborative Arrangements” and our critical accounting policies “Collaborations; Variable Interest Entities.”

We have also out-licensed internally developed programs to collaborators who are leading the development of these programs. These outlicense arrangements include our collaboration agreements with:


•	Merck KGaA, pursuant to which Merck KGaA will, subject to regulatory approval, obtain rights to four oncology research and development programs; and


•	Janssen Pharmaceuticals, Inc. which is developing JNJ-3872 (formerly VX-787) for the treatment of influenza.

Pursuant to these outlicensing arrangements, our collaborators are responsible for the research, development and commercialization costs associated with these programs and we are entitled to receive contingent milestone and/or royalty payments. As a result, we do not expect to incur significant expenses in connection with these programs and have the potential for future collaborative and/or royalty revenues resulting from these programs.

Drug Discovery and Development

Discovery and development of a new pharmaceutical product is a difficult and lengthy process that requires significant financial resources along with extensive technical and regulatory expertise and can take 10 to 15 years or more. Potential drug candidates are subjected to rigorous evaluations, driven in part by stringent regulatory considerations, designed to

generate information concerning efficacy, side-effects, proper dosage levels and a variety of other physical and chemical characteristics that are important in determining whether a drug candidate should be approved for marketing as a pharmaceutical product. Most chemical compounds that are investigated as potential drug candidates never progress into development, and most drug candidates that do advance into development never receive marketing approval. Because our investments in drug candidates are subject to considerable risks, we closely monitor the results of our discovery, research, clinical trials and nonclinical studies and frequently evaluate our drug development programs in light of new data and scientific, business and commercial insights, with the objective of balancing risk and potential. This process can result in abrupt changes in focus and priorities as new information becomes available and as we gain additional understanding of our ongoing programs and potential new programs, as well as those of our competitors.

If we believe that data from a completed registration program support approval of a drug candidate, we submit an NDA to the FDA requesting approval to market the drug candidate in the United States and seek analogous approvals from comparable regulatory authorities in foreign jurisdictions. To obtain approval, we must, among other things, demonstrate with evidence gathered in nonclinical studies and well-controlled clinical trials that the drug candidate is safe and effective for the disease it is intended to treat and that the manufacturing facilities, processes and controls for the manufacture of the drug candidate are adequate. The FDA and foreign regulatory authorities have substantial discretion in deciding whether or not a drug candidate should be granted approval based on the benefits and risks of the drug candidate in the treatment of a particular disease, and could delay, limit or deny regulatory approval. If regulatory delays are significant or regulatory approval is limited or denied altogether, our financial results and the commercial prospects for the drug candidate involved will be harmed.

Regulatory Compliance

Our marketing of pharmaceutical products is subject to extensive and complex laws and regulations. We have a corporate compliance program designed to actively identify, prevent and mitigate risk through the implementation of compliance policies and systems, and through the promotion of a culture of compliance. Among other laws, regulations and standards, we are subject to various U.S. federal and state laws, and comparable foreign laws pertaining to health care fraud and abuse, including anti-kickback and false claims statutes, and laws prohibiting the promotion of drugs for unapproved or off-label uses. Anti-kickback laws make it illegal for a prescription drug manufacturer to solicit, offer, receive or pay any remuneration to induce the referral of business, including the purchase or prescription of a particular drug. False claims laws prohibit anyone from presenting for payment to third-party payors, including Medicare and Medicaid, claims for reimbursed drugs or services that are false or fraudulent, claims for items or services not provided as claimed, or claims for medically unnecessary items or services. We expect to continue to devote substantial resources to maintain, administer and expand these compliance programs globally.

Reimbursement

Sales of our products depend, to a large degree, on the extent to which our products are covered by third-party payors, such as government health programs, commercial insurance and managed health care organizations. We dedicate substantial management and other resources in order to obtain and maintain appropriate levels of reimbursement for our products from third-party payors, including governmental organizations in the United States and ex-U.S. markets. In the United States, we continue to engage in discussions with numerous commercial insurers and managed health care organizations, along with government health programs that are typically managed by authorities in the individual states. In Europe and other ex-U.S. markets, we are working to obtain government reimbursement for ORKAMBI on a country-by-country basis, because in many foreign countries patients are unable to access prescription pharmaceutical products that are not reimbursed by their governments. In the fourth quarter of 2016, we reached a pricing and reimbursement agreement for ORKAMBI with the German Federal Association of the Statutory Health Insurances. Consistent with our experience with KALYDECO when it was first approved, we expect reimbursement discussions in ex-U.S. markets may take a significant period of time.

Recent Transaction

In January 2017, we entered into a Strategic Collaboration and License Agreement with Merck KGaA, Darmstadt, Germany, or Merck KGaA. Pursuant to the agreement, we granted Merck KGaA an exclusive worldwide license to research, develop and commercialize four oncology research and development programs, including our ataxia telangiectasia and Rad3-related protein inhibitor, or ATR program, including VX-970 and VX-803, and our DNA-dependent protein kinase inhibitor, or DNA-PK program, including VX-984. Under the agreement, we expect to receive an up-front payment of $230.0 million, subject to Hart-Scott Rodino clearance, and tiered royalties on potential sales of licensed products.

RESULTS OF OPERATIONS



										2016/2015 Comparison					2015/2014 Comparison
										Increase/(Decrease)					Increase/(Decrease)
	2016			2015			2014			$			%		$			%
	(in thousands)									(in thousands, except percentages)
Revenues	$	1,702,177		$	1,032,336		$	580,415		$	669,841		65	%	$	451,921		78	%
Operating costs and expenses	1,692,241			1,499,215			1,272,827			193,026			13	%	226,388			18	%
Other items, net	(121,988		)	(89,455		)	(45,231		)	$	32,533		36	%	44,224			98	%
Loss from continuing operations attributable to Vertex	(112,052		)	(556,334		)	(737,643		)	(444,282		)	(80	)%	(181,309		)	(25	)%
Loss from discontinued operations attributable to Vertex	—			—			(912		)	n/a			n/a		n/a			n/a
Net loss attributable to Vertex	$	(112,052	)	$	(556,334	)	$	(738,555	)	$	(444,282	)	(80	)%	$	(182,221	)	(25	)%

Net Loss Attributable to Vertex

Comparison of Net Loss Attributable to Vertex 2016 vs. 2015

Net loss attributable to Vertex was $112.1 million in 2016 as compared to a net loss attributable to Vertex of $556.3 million in 2015. Our revenues increased significantly in 2016 as compared to 2015 primarily due to a $628.9 million increase in ORKAMBI net product revenues, which we began selling in mid-2015, and a $71.8 million increase in KALYDECO net product revenues, partially offset by decreases in our royalty revenues and collaborative revenues. Our operating costs and expenses increased in 2016 as compared to 2015 primarily due to increases in cost of product revenues, research and development expenses, sales, general and administrative expenses.

The change in our other items, net was primarily due to a $54.9 million increase in the fair value of contingent payments related to our consolidated VIEs, which results in an increase in net loss attributable to Vertex.

Comparison of Net Loss Attributable to Vertex 2015 vs. 2014

Net loss attributable to Vertex was $556.3 million in 2015 as compared to a net loss attributable to Vertex of $738.6 million in 2014. Our revenues increased significantly in 2015 as compared to 2014 primarily due to ORKAMBI net product revenues, which commenced in the third quarter of 2015, and a $167.9 million increase in KALYDECO net product revenues, partially offset by a $43.6 million decrease in our collaborative revenues. Our operating costs and expenses increased in 2015 as compared to 2014 primarily due to increases in research and development expenses, sales, general and administrative expenses and cost of product revenues, partially offset by decreased restructuring expenses and royalty expenses.

Our other items, net in 2015 and 2014, included $4.5 million and $0.5 million increases in the fair value of contingent payments related to our consolidated VIEs, which resulted in corresponding increases in net loss attributable to Vertex.

Earnings Per Share

In 2016, 2015 and 2014, net loss attributable to Vertex was $0.46, $2.31 and $3.14, respectively, per diluted share. In 2016, 2015 and 2014, net loss from continuing operations attributable to Vertex was $0.46, $2.31 and $3.14, respectively, per diluted share.

Common Shares Outstanding

Our shares of outstanding common stock increased from 246.3 million shares on December 31, 2015 to 248.3 million shares on December 31, 2016 due to our issuance in 2016 of approximately 2.0 million shares of common stock pursuant to our employee equity programs. Our shares of outstanding common stock increased from 241.8 million shares on December 31, 2014 to 246.3 million shares on December 31, 2015 due to our issuance in 2015 of approximately 4.5 million shares of common stock issued pursuant to our employee equity programs.

Stock-based Compensation

Stock-based compensation expense was $237.7 million, $231.0 million and $177.5 million in 2016, 2015 and 2014, respectively. The increase in stock-based compensation expense has primarily been due to increases in the grant-date fair value of equity awards granted in recent years, partially offset by changes we have made in our equity compensation program.

Revenues



							2016/2015 Comparison					2015/2014 Comparison
							Increase/(Decrease)					Increase/(Decrease)
	2016		2015		2014		$			%		$			%
	(in thousands)						(in thousands, except percentages)
Product revenues, net	$	1,683,632	$	1,000,324	$	487,821	$	683,308		68	%	$	512,503		105	%
Royalty revenues	16,600		23,959		40,919		(7,359		)	(31	)%	(16,960		)	(41	)%
Collaborative revenues	1,945		8,053		51,675		(6,108		)	(76	)%	(43,622		)	(84	)%
Total revenues	$	1,702,177	$	1,032,336	$	580,415	$	669,841		65	%	$	451,921		78	%

Product Revenues, Net



	2016		2015		2014
	(in thousands)
ORKAMBI	$	979,590	$	350,663	$	—
KALYDECO	$	703,432	$	631,674	$	463,750
INCIVEK	610		17,987		24,071
Total product revenues, net	$	1,683,632	$	1,000,324	$	487,821

Our total net product revenues increased by 68% in 2016 as compared to 2015 due to increased net product revenues from ORKAMBI, which was approved by the FDA in July 2015, and increased KALYDECO net product revenues.

ORKAMBI sales commenced in mid-2015 and ORKAMBI net product revenues increased from $350.7 million in 2015 to $979.6 million in 2016. In 2015 and 2016, we recognized approximately $1.6 million and $76.4 million, respectively, in ex-U.S. ORKAMBI net product revenues, which were mainly from Germany. We also are distributing ORKAMBI in France pursuant to an early access program, but are not recognizing any revenues on ORKAMBI sales in France because the price is not fixed or determinable. Our consolidated balance sheets include $73.4 million collected as of December 31, 2016 in France related to ORKAMBI. We believe that the level of our ORKAMBI revenues during 2017 will be dependent whether, when and on what terms we are able to obtain reimbursement in additional ex-U.S. markets, the number and rate at which additional patients begin treatment with ORKAMBI, the proportion of initiated patients who remain on treatment and the compliance rates for patients who remain on treatment.

In 2016, KALYDECO net product revenues were $703.4 million, including $303.9 million of net product revenues from ex-U.S. markets, compared to KALYDECO net product revenues of $631.7 million in 2015, including $266.1 million of net product revenues from ex-U.S. markets. In 2017, we expect our KALYDECO net product revenues will be similar to our KALYDECO net product revenues in 2016. In 2014, KALYDECO net product revenues were $463.8 million, including $201.4 million of net product revenues from ex-U.S. markets. The increases were primarily due to additional patients being treated with KALYDECO as we completed reimbursement discussions in various jurisdictions and to the increased number of patients eligible to receive KALYDECO through label expansions.

INCIVEK net product revenues were $0.6 million, $18.0 million and $24.1 million in 2016, 2015 and 2014, respectively. We have withdrawn INCIVEK from the market and may continue to have small adjustments to INCIVEK revenues over the next several quarters as we adjust our INCIVEK reserves for rebates, chargebacks and discounts.

Royalty Revenues

Our royalty revenues were $16.6 million, $24.0 million and $40.9 million in 2016, 2015 and 2014, respectively. Since the beginning of 2014, our royalty revenues have consisted of (i) revenues related to a cash payment we received in 2008

when we sold our rights to certain HIV royalties and (ii) revenues related to certain third-party royalties payable by our collaborators on sales of HIV drugs and telaprevir that also result in corresponding royalty expenses.

Collaborative Revenues

Our collaborative revenues were $1.9 million, $8.1 million and $51.7 million in 2016, 2015 and 2014, respectively. In 2014, the majority of our collaborative revenues related to $35.0 million in payments we received from Janssen Inc. related to our outlicense of VX-787. Our collaborative revenues have historically fluctuated significantly from one period to another and may continue to fluctuate in the future. We expect our collaborative revenues to increase significantly in 2017 as a result of the $230.0 million upfront payment we expect to receive pursuant to the collaboration agreement with Merck KGaA that we entered into in January 2017.

Operating Costs and Expenses



							2016/2015 Comparison					2015/2014 Comparison
							Increase/(Decrease)					Increase/(Decrease)
	2016		2015		2014		$			%		$			%
	(in thousands)						(in thousands, except percentages)
Cost of product revenues	$	206,811	$	117,151	$	39,725	$	89,660		77	%	$	77,426		195	%
Royalty expenses	3,649		7,361		21,262		(3,712		)	(50	)%	(13,901		)	(65	)%
Research and development expenses	1,047,690		995,922		855,506		51,768			5	%	140,416			16	%
Sales, general and administrative expenses	432,829		376,575		305,409		56,254			15	%	71,166			23	%
Restructuring expenses	1,262		2,206		50,925		(944		)	(43	)%	(48,719		)	(96	)%
Total costs and expenses	$	1,692,241	$	1,499,215	$	1,272,827	$	193,026		13	%	$	226,388		18	%

Cost of Product Revenues

Our cost of product revenues includes the cost of producing inventories that corresponded to product revenues for the reporting period, plus the third-party royalties payable on our net sales of our products. Pursuant to our agreement with Cystic Fibrosis Foundation Therapeutics Incorporated, or CFFT, our tiered third-party royalties on sales of KALYDECO and ORKAMBI, calculated as a percentage of net sales, range from the single digits to the sub-teens.

Our cost of product revenues have been increasing due primarily to increased net product revenues. In each of 2016 and 2015, our cost of product revenues included a $13.9 million commercial milestone that was earned by CFFT related to sales of ORKAMBI. There are no further commercial milestones payable to CFFT. In future periods, our cost of product revenues will not be affected by commercial milestones on ORKAMBI, with our cost of product revenues generally tracking our net product revenues.

Royalty Expenses

Royalty expenses include third-party royalties payable upon net sales of telaprevir by our collaborators in their territories and expenses related to a subroyalty payable to a third party on net sales of an HIV protease inhibitor sold by GlaxoSmithKline. Royalty expenses do not include royalties we pay to CFFT on sales of KALYDECO and ORKAMBI, which instead are included in cost of product revenues.

Research and Development Expenses



							2016/2015 Comparison					2015/2014 Comparison
							Increase/(Decrease)					Increase/(Decrease)
	2016		2015		2014		$			%		$		%
	(in thousands)						(in thousands, except percentages)
Research expenses	$	314,602	$	337,797	$	257,483	$	(23,195	)	(7	)%	$	80,314	31	%
Development expenses	733,088		658,125		598,023		74,963			11	%	60,102		10	%
Total research and development expenses	$	1,047,690	$	995,922	$	855,506	$	51,768		5	%	$	140,416	16	%

Our research and development expenses include internal and external costs incurred for research and development of our drugs and drug candidates. We do not assign our internal costs, such as salary and benefits, stock-based compensation expense, laboratory supplies and other direct expenses and infrastructure costs, to individual drugs or drug candidates, because the employees within our research and development groups typically are deployed across multiple research and development programs. These internal costs are significantly greater than our external costs, such as the costs of services provided to us by clinical research organizations and other outsourced research, which we allocate by individual program. All research and development costs for our drugs and drug candidates are expensed as incurred.

Over the past three years, we have incurred $2.9 billion in research and development expenses associated with drug discovery and development. The successful development of our drug candidates is highly uncertain and subject to a number of risks. In addition, the duration of clinical trials may vary substantially according to the type, complexity and novelty of the drug candidate and the disease indication being targeted. The FDA and comparable agencies in foreign countries impose substantial requirements on the introduction of therapeutic pharmaceutical products, typically requiring lengthy and detailed laboratory and clinical testing procedures, sampling activities and other costly and time-consuming procedures. Data obtained from nonclinical and clinical activities at any step in the testing process may be adverse and lead to discontinuation or redirection of development activities. Data obtained from these activities also are susceptible of varying interpretations, which could delay, limit or prevent regulatory approval. The duration and cost of discovery, nonclinical studies and clinical trials may vary significantly over the life of a project and are difficult to predict. Therefore, accurate and meaningful estimates of the ultimate costs to bring our drug candidates to market are not available.

In 2014, 2015 and 2016, costs related to our CF programs represented the largest portion of our development costs. Any estimates regarding development and regulatory timelines for our drug candidates are highly subjective and subject to change. We cannot make a meaningful estimate when, if ever, our other clinical development programs will generate revenues and cash flows.

Research Expenses



							2016/2015 Comparison					2015/2014 Comparison
							Increase/(Decrease)					Increase/(Decrease)
	2016		2015		2014		$			%		$			%
	(in thousands)						(in thousands, except percentages)
Research Expenses:
Salary and benefits	$	80,845	$	81,752	$	82,975	$	(907	)	(1	)%	$	(1,223	)	(1	)%
Stock-based compensation expense	51,034		49,744		40,531		1,290			3	%	9,213			23	%
Laboratory supplies and other direct expenses	43,151		37,058		38,082		6,093			16	%	(1,024		)	(3	)%
Outsourced services	33,682		24,210		17,401		9,472			39	%	6,809			39	%
Collaboration payments	33,000		75,000		—		(42,000		)	(56	)%	n/a			n/a
Infrastructure costs	72,890		70,033		78,494		2,857			4	%	(8,461		)	(11	)%
Total research expenses	$	314,602	$	337,797	$	257,483	$	(23,195	)	(7	)%	$	5,314		2	%

Over the past three years we have maintained a substantial and consistent investment in our internal research activities. Our total research expenses in 2016 and 2015 have been affected by research expenses associated with our business

development activities, including in 2016 a $20.0 million upfront payment to Moderna Therapeutics, Inc. and approximately $10.0 million in expenses related to the acquisition of early-stage research assets, and in 2015 a $75.0 million upfront payment we made to CRISPR Therapeutics AG, or CRISPR. We expect to continue to invest in our research programs with a focus on identifying drug candidates with the goal of creating transformative medicines.

Development Expenses



							2016/2015 Comparison					2015/2014 Comparison
							Increase/(Decrease)					Increase/(Decrease)
	2016		2015		2014		$			%		$			%
	(in thousands)						(in thousands, except percentages)
Development Expenses:
Salary and benefits	$	177,399	$	164,466	$	161,718	$	12,933		8	%	$	2,748		2	%
Stock-based compensation expense	102,417		103,211		76,467		(794		)	(1	)%	26,744			35	%
Laboratory supplies and other direct expenses	42,861		30,611		34,689		12,250			40	%	(4,078		)	(12	)%
Outsourced services	282,137		248,506		197,743		33,631			14	%	50,763			26	%
Drug supply costs	12,510		9,799		10,026		2,711			28	%	(227		)	(2	)%
Infrastructure costs	115,764		101,532		117,380		14,232			14	%	(15,848		)	(14	)%
Total development expenses	$	733,088	$	658,125	$	598,023	$	74,963		11	%	$	60,102		10	%

Our development expenses increased by $75.0 million, or 11%, in 2016 as compared to 2015 and increased by $60.1 million, or 10%, in 2015 as compared to 2014. The increase in 2016 as compared to 2015 was primarily due to an increase in outsourced services related to ongoing clinical trials, including our Phase 3 development program for tezacaftor in combination with ivacaftor and increases in salary and benefits, laboratory supplies and other direct expenses and infrastructure costs. We expect our development expenses to increase in 2017 as compared to 2016 due to activities related to clinical trials, including continuation of the Phase 3 development program for tezacaftor in combination with ivacaftor as well as clinical trials associated with our next-generation correctors.

The increased development expenses in 2015 as compared to 2014 were primarily due to an increase in outsourced services related to ongoing clinical trials, including our Phase 3 development program for tezacaftor in combination with ivacaftor and an increase in stock-based compensation expense, partially offset by decreased infrastructure costs and decreased laboratory supplies and other direct expenses.

Sales, General and Administrative Expenses



							2016/2015 Comparison				2015/2014 Comparison
							Increase/(Decrease)				Increase/(Decrease)
	2016		2015		2014		$		%		$		%
	(in thousands)						(in thousands, except percentages)
Sales, general and administrative expenses	$	432,829	$	376,575	$	305,409	$	56,254	15	%	$	71,166	23	%

Sales, general and administrative expenses increased by 15% in 2016 as compared to 2015, and by 23% in 2015 as compared to 2014. These increases were primarily due to increased investment in commercial support for ORKAMBI in the United States and ex-U.S. markets.

Restructuring Expense

In 2016, 2015 and 2014, we recorded restructuring expenses of $1.3 million, $2.2 million and $50.9 million, respectively. Our restructuring expenses in 2014 were primarily related to the relocation of our corporate headquarters in Massachusetts to Boston from Cambridge. As of December 31, 2016, our accrued restructuring liability related to our lease obligation in Cambridge was $8.0 million. This lease obligation expires in April 2018.

Other Items, Net

Interest Expense, Net

In 2016, 2015 and 2014, interest expense, net was $81.4 million, $84.2 million and $72.9 million, respectively. The decrease in interest expense, net in 2016 as compared to 2015 was primarily due to a lower interest rate on the $300.0 million of outstanding borrowings following the refinancing of our credit agreement in October 2016. The increase in interest expense, net in 2015 as compared to 2014 was primarily due to the interest expense we incurred for the full fiscal year in 2015 on the $300.0 million that we borrowed in mid-2014 pursuant to our prior credit agreement. We expect our interest expense, net in 2017 to be dependent on the amounts we borrow pursuant to our revolving credit agreement during 2017.

Other Income (Expense), Net

In 2016, net other income was $4.1 million and primarily due to foreign exchange gains. In 2015, net other expense was $6.7 million primarily due to foreign exchange losses. In 2014, we recorded net other income of $30.4 million primarily due to a credit of $36.7 million related to a one-time cash payment we received in 2014 from our landlord pursuant to leases for our corporate headquarters in Boston, Massachusetts.

Income Taxes

In 2016, we recorded a provision for income taxes of $16.7 million, principally related to income taxes payable by our VIEs. In 2015, we recorded a provision for income taxes of $30.4 million, principally due to the consolidation of Parion as a VIE into our consolidated financial statements in the second quarter of 2015. In 2014, our provision for income taxes was $7.0 million, of which approximately $3.9 million was due to the consolidation of BioAxone as a VIE into our consolidated financial statements in the fourth quarter of 2014.

Noncontrolling Interest (VIEs)

The net (income) loss attributable to noncontrolling interest (VIEs) recorded on our consolidated statements of operations reflects Parion and BioAxone's net loss (income) for the reporting period, adjusted for any changes in the noncontrolling interest holders’ claim to net assets, including contingent milestone, royalty and option payments. A summary of net (income) loss attributable to noncontrolling interest related to our VIEs for the three years ended December 31, 2016 is as follows:



	2016			2015			2014
	(in thousands)
Loss attributable to noncontrolling interest before provision for income taxes	$	10,086		$	6,646		$	764
Provision for income taxes	16,743			29,731			3,876
Increase in fair value of contingent payments	(54,850		)	(4,530		)	(450		)
Net (income) loss attributable to noncontrolling interest	$	(28,021	)	$	31,847		$	4,190

Discontinued Operations

In 2014, we recorded a loss from discontinued operations attributable to Vertex of $0.9 million. Our loss from discontinued operations in this period included losses due to the deconsolidation of Alios BioPharma, Inc, or Alios, our former collaborator, prior to the termination of our collaboration agreement with Alios in the fourth quarter of 2014.

LIQUIDITY AND CAPITAL RESOURCES

As of December 31, 2016, we had cash, cash equivalents and marketable securities of $1.43 billion, which represented an increase of $392.1 million from approximately $1.04 billion as of December 31, 2015. The increase in our cash, cash equivalents and marketable securities balance was primarily due to increased cash receipts in 2016 from product sales, partially offset by increased cash expenditures in 2016 related to, among other things, research and development expenses and sales, general and administrative expenses.

Our future cash flows will be substantially dependent on product sales of ORKAMBI and KALYDECO.

Sources of Liquidity

We intend to rely on our existing cash, cash equivalents and marketable securities together with cash flows from product sales as our primary source of liquidity. We are receiving cash flows from sales of ORKAMBI and KALYDECO from the United States and ex-U.S. markets. Future net product revenues for ORKAMBI from ex-U.S. markets will be dependent on, among other things, the timing of and ability to complete reimbursement discussions in European countries. Under the agreement we entered into in the first quarter of 2016 with Merck KGaA, we expect to receive an up-front payment of $230.0 million in 2017, subject to Hart-Scott Rodino clearance.

As of December 31, 2016, we had borrowed $300.0 million under a five-year $500.0 million revolving credit facility that we entered into in October 2016. We may repay and reborrow amounts under the revolving credit agreement without penalty. Subject to certain conditions, we may request that the borrowing capacity under this credit agreement be increased by an additional $300.0 million. In February 2017, we repaid the $300.0 million that we had borrowed pursuant to the revolving credit agreement plus accrued interest using existing cash resources.

In 2014 and 2015, we also received significant proceeds from the issuance of common stock under our employee benefit plans, but we received limited proceeds from employee benefit plans in 2016 and the amount and timing of future proceeds from employee benefits plans is uncertain. Other possible sources of liquidity include strategic collaborative agreements that include research and/or development funding, commercial debt, public and private offerings of our equity and debt securities, development milestones and royalties on sales of products, software and equipment leases, strategic sales of assets or businesses and financial transactions. Negative covenants in our credit agreement may prohibit or limit our ability to access these sources of liquidity.

Future Capital Requirements

We incur substantial operating expenses to conduct research and development activities and to operate our organization. Under the terms of our credit agreement entered into in October 2016, we are required to repay all outstanding principal amounts in 2021. We also have substantial facility and capital lease obligations, including leases for two buildings in Boston, Massachusetts that continue through 2028. In addition, we have entered into certain collaboration agreements with third parties that include the funding of certain research, development and commercialization efforts with the potential for future milestone and royalty payments by us upon the achievement of pre-established developmental and regulatory targets.

We expect that cash flows from ORKAMBI and KALYDECO, together with our current cash, cash equivalents and marketable securities will be sufficient to fund our operations for at least the next twelve months. The adequacy of our available funds to meet our future operating and capital requirements will depend on many factors, including the amounts of future revenues generated by ORKAMBI and KALYDECO and the potential introduction of one or more of our other drug candidates to the market, the level of our business development activities and the number, breadth, cost and prospects of our research and development programs.

Financing Strategy

We have a $500.0 million revolving credit facility that we entered into in October 2016. We may repay and reborrow amounts under the revolving credit agreement without penalty. In addition, subject to certain conditions, we may request that the borrowing capacity under this credit agreement be increased by an additional $300.0 million. We may raise additional capital through public offerings or private placements of our securities or securing new collaborative agreements or other methods of financing. We will continue to manage our capital structure and will consider all financing opportunities, whenever they may occur, that could strengthen our long-term liquidity profile. There can be no assurance that any such financing opportunities will be available on acceptable terms, if at all.

CONTRACTUAL COMMITMENTS AND OBLIGATIONS

The following table sets forth our commitments and obligations as of December 31, 2016:



	Payments Due by Period
	2017		2018-2019		2020-2021		2022 and later		Total
	(in thousands)
Fan Pier Leases	$	67,206	$	139,795	$	145,178	$	535,032	$	887,211
Facility leases, excluding Fan Pier Leases	36,391		41,568		39,816		200,626		318,401
Capital lease obligations	21,995		30,171		5,793		543		58,502
Revolving credit facility	300,000		—		—		—		300,000
Research, development and drug supply costs	24,061		—		—		—		24,061
Other	3,119		3,004		226		6,108		12,457
Total contractual commitments and obligations	$	452,772	$	214,538	$	191,013	$	742,309	$	1,600,632

Leases

We lease two buildings that are located at Fan Pier in Boston, Massachusetts. We commenced lease payments on these two buildings in December 2013 and the initial lease periods end in December 2028.

In December 2015, we entered into a lease agreement, pursuant to which we agreed to lease approximately 170,000 square feet of office and laboratory space in a building under construction in San Diego, California. The lease will commence upon completion of the building, scheduled for the first half of 2018 and will extend for 16 years from the commencement date. The future minimum rental payments that we are obligated to pay after taking occupancy are included in “Facility leases, excluding Fan Pier Leases.”

We currently lease laboratory and office space at our former Kendall Square facility in Cambridge, Massachusetts that will expire in 2018. Our future minimum commitments under our Kendall Square lease are included in “Facility leases, excluding Fan Pier Leases.” We have entered into three subleases for a portion of the rentable square footage at the Kendall Square facility to offset our on-going contractual lease obligations. The future minimum committed income from the subleases is $15.7 million for 2017 and $5.2 million total for 2018. These amounts are not offset against our obligations set forth in the table above.

The table also reflects leases of equipment, leasehold improvements and software licenses that are accounted for as capital leases.

Revolving Credit Facility

In October 2016, we entered into a revolving credit agreement and borrowed $300.0 million under a $500.0 million revolving credit facility. Subject to certain conditions, we may request that the borrowing capacity under this credit agreement be increased by an additional $300.0 million. The outstanding loan bears interest at a rate of LIBOR plus an applicable margin ranging from 1.75% to 2.50%, based on our consolidated leverage ratio (the ratio of our total consolidated funded indebtedness to our consolidated EBITDA for the most recently completed four fiscal quarter period). The table above reflects the $300.0 million outstanding as of December 31, 2016. The above table assumes the repayment of the $300.0 million in 2017 because we repaid the outstanding amounts under the credit agreement in February 2017. We may reborrow and repay amounts under the revolving credit agreement without penalty.

Research, Development and Drug Supply Costs

Research, development and drug supply costs, does not include certain payments we are obligated to make to clinical research organizations, or CROs, because these contracts are cancelable, at our option, with notice. However, we historically have not cancelled such contracts. As of December 31, 2016, we had accrued $25.1 million related to these contracts for costs incurred for services provided through December 31, 2016, and we have approximately $175.1 million in cancelable future commitments based on existing contracts as of December 31, 2016. These amounts reflect planned expenditures based on existing contracts and do not reflect any future modifications to, or terminations of, existing contracts or anticipated or potential new contracts.

Collaborative Arrangements

We have entered into certain research and development collaboration agreements with third parties that include the funding of certain development, manufacturing and commercialization efforts with the potential for future milestone and royalty payments by us upon the achievement of pre-established developmental, regulatory and/or commercial targets. Our obligation to fund these efforts is contingent upon continued involvement in the programs and/or the lack of any adverse events that could cause the discontinuance of the programs. Our payment obligations under these collaborations include the following:

•

CFFT: CFFT has the right to tiered royalties ranging from single digits to sub-teens on any approved drugs first synthesized and/or tested during a research term on or before February 28, 2014, including KALYDECO, ORKAMBI, lumacaftor and tezacaftor and royalties ranging from low single digits to mid-single digits on potential sales of certain compounds first synthesized and/or tested between March 1, 2014 and August 31, 2016.


•	Parion: Parion has the potential to receive milestone and royalty payments, including up to $490.0 million in development and regulatory milestone payments for the development of VX-371 and/or VX-551 to treat CF.


•	CRISPR: CRISPR has the potential to receive milestone and royalty payments, including up to $420.0 million in development, regulatory and commercial milestone payments for each of up to six targets pursuant to the collaboration.


•	Moderna: Moderna has the potential to receive milestone and royalty payments, including up to $275.0 million in development and regulatory milestones.


•	BioAxone: BioAxone has the potential to receive milestone and royalty payments, including up to $90.0 million in development and regulatory milestone payments (including a license continuation fee).

Contingent payments under these agreements become due and payable only upon achievement of certain milestones and are not included in the contractual obligations table above.

Tax-related Obligations

We exclude liabilities pertaining to uncertain tax positions from our summary of contractual obligations as we cannot make a reliable estimate of the period of cash settlement with the respective taxing authorities. As of December 31, 2016, we did not have any liabilities associated with uncertain tax positions. As of December 31, 2016, we cannot reasonably estimate the amount we expect to pay within the next twelve months in connection with any such settlements.

Other Funding Commitments

Our table detailing contractual commitments and obligations does not include severance payment obligations to certain of our executive officers in the event of a not-for-cause employment termination under existing employment contracts. We provide information regarding these obligations annually in our proxy statement for our annual meeting of shareholders.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

Our discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements prepared in accordance with generally accepted accounting principles in the United States. The preparation of these financial statements requires us to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reported periods. These items are monitored and analyzed by management for changes in facts and circumstances, and material changes in these estimates could occur in the future. Changes in estimates are reflected in reported results for the period in which the change occurs. We base our estimates on historical experience and various other assumptions that we believe to be reasonable under the circumstances. Actual results may differ from our estimates if past experience or other assumptions do not turn out to be substantially accurate.

We believe that our application of the following accounting policies, each of which requires significant judgments and estimates on the part of management, are the most critical to aid in fully understanding and evaluating our reported financial results:


•	revenue recognition;


•	intangible assets;


•	collaborations and variable interest entities;


•	research and development accruals;


•	commercial supplies and inventories;


•	income taxes;


•	leases;


•	restructuring expenses; and


•	stock-based compensation expense.

Our accounting policies, including the ones discussed below, are more fully described in the Notes to our consolidated financial statements, including Note A, “Nature of Business and Accounting Policies,” included in this Annual Report on Form 10-K.

Revenue Recognition

Product Revenues, Net

We generate product revenues from sales in the United States and in international markets. We sell our products principally to a limited number of specialty pharmacy providers and selected regional wholesalers in North America as well as government-owned and supported customers in international markets, collectively, our customers. Our customers in North America subsequently resell our products to patients and health care providers. We contract with government agencies and various private organizations so that our products will be eligible for purchase by, or partial or full reimbursement from, such third-party payors. We recognize net product revenues from sales of our products upon delivery to our customers as long as:


•	there is persuasive evidence that an arrangement exists between us and our customer;


•	collectability is reasonably assured; and


•	the price is fixed or determinable.

In order to conclude that the price is fixed or determinable, we must be able to calculate our gross product revenues from our customers and reasonably estimate our net product revenues upon delivery to our customers’ locations. Our gross product revenues are based on the fixed price for our products that we charge our customers. We estimate our net product revenues by deducting from our gross product revenues (i) trade allowances, such as invoice discounts for prompt payment and customer fees, (ii) estimated government and private payor rebates, chargebacks and discounts, (iii) estimated reserves for expected product returns and (iv) estimated costs of co-pay assistance programs for patients, as well as other incentives for certain indirect customers. We make significant estimates and judgments that materially affect our recognition of net product revenues. Changes in our estimates of net product revenues could have a material effect on net product revenues recorded in the period in which we determine that change occurs.

In certain instances, we may be unable to reasonably conclude that the price is fixed or determinable at the time of delivery, in which case we defer the recognition of revenues. For example, we are distributing ORKAMBI in France pursuant to early access programs but have not recognized any product revenues based on these sales because the price was not fixed or determinable due to the ongoing negotiations regarding the reimbursement rate for ORKAMBI in France. Once we are able to determine that the price is fixed or determinable, we recognize the revenues associated with the units in which revenue recognition was deferred. Our consolidated balance sheets include $73.4 million collected as of December 31, 2016 in France related to ORKAMBI.

The value of the rebates, chargebacks and discounts provided to third-party payors per course of treatment vary significantly and are based on government-mandated discounts and our arrangements with other third-party payors. In order to estimate our total rebates, chargebacks and discounts, we estimate the percentage of prescriptions that will be covered by each third-party payor, which is referred to as the payor mix. We track available information regarding changes, if any, to the

payor mix for our products, to our contractual terms with third-party payors and to applicable governmental programs and regulations and levels of our products in the distribution channel. We adjust our estimated rebates, chargebacks and discounts based on new information, including information regarding actual rebates, chargebacks and discounts for our products, as it becomes available. Claims by third-party payors for rebates, chargebacks and discounts frequently are submitted to us significantly after the related sales, potentially resulting in adjustments in the period in which the new information becomes known.

Our customers generally have the right to return unopened unprescribed packages subject to contractual limitations. To date returns have been minimal and, based on inventory levels held by our customers and our distribution model, we believe that returns of products will continue to be minimal. We track actual returns by individual production lots and will continue to monitor inventory levels in the distribution channel. If necessary, we will adjust our estimated product returns based on new information as it becomes available.

Collaborative Revenues

We recognize revenues generated through collaborative research, development and/or commercialization agreements. The terms of these agreements typically include payment to us of one or more of the following: nonrefundable, up-front license fees; development and commercial milestone payments; funding of research and/or development activities; payments for services we provide through our third-party manufacturing network; and royalties on net sales of licensed products. Each of these types of payments results in collaborative revenues, except for revenues from royalties on net sales of licensed products, which are classified as royalty revenues.

For each collaborative research, development and/or commercialization agreement that results in revenues, we determine (i) whether multiple deliverables exist, (ii) whether the undelivered elements have value to the customer on a stand-alone basis, (iii) how the deliverables should be separated and (iv) how the consideration should be allocated to the deliverables. We allocate consideration in an arrangement using the relative selling price method based on our best estimate of selling price of deliverables if we do not have vendor-specific objective evidence or third-party evidence. As part of the accounting for these agreements, we must develop assumptions that require judgment to determine the best estimate of selling price. We utilize key assumptions to determine the best estimate of selling price, which may include patient enrollment requirements from regulatory authorities, development timelines, reimbursement rates for personnel costs, discount rates, and estimated third-party development costs.

Intangible Assets

We maintain an indefinite-lived in-process research and development asset on our consolidated balance sheet until either the research and development project underlying it is completed or the asset becomes impaired. When we determine that an asset has become impaired or we abandon a project, we write down the carrying value of the related intangible asset to its fair value and take an impairment charge in the period in which the impairment occurs.

We assess the fair value of assets, including intangible assets such as in-process research and development assets, using a variety of methods, including present-value models that are based upon multiple probability-weighted scenarios involving the development and potential commercialization of the acquired drug candidates. The present-value models require us to make significant assumptions regarding the estimates that market participants would make in evaluating a drug candidate, including the probability of successfully completing clinical trials and obtaining regulatory approval to market the drug candidate, the timing of and the expected costs to complete in-process research and development projects, future net cash flows from potential drug sales, which are based on estimates of the sales price of the drug, the number of patients who will be diagnosed and treated and our competitive position in the marketplace, and appropriate discount and tax rates.

We test our intangible assets for impairment on an annual basis as of October 1, and more frequently if indicators are present or changes in circumstance suggest that impairment may exist. Events that could result in an impairment, or trigger an interim impairment assessment, include the receipt of additional clinical or nonclinical data regarding our drug candidate or a potentially competitive drug candidate, changes in the clinical development program for a drug candidate or new information regarding potential sales for the drug. In connection with each annual impairment assessment and any interim impairment assessment, we compare the fair value of the asset as of the date of the assessment with the carrying value of the asset on our consolidated balance sheet.

As of December 31, 2016, we had $284.3 million of indefinite-lived intangible assets recorded on our balance sheet related to Parion and BioAxone, our variable interest entities, or VIEs.

Collaborations; Variable Interest Entities

Our collaborations require us to apply accounting policies that involve significant judgments and that have a material effect on our consolidated financial statements. We review each collaboration agreement pursuant to which we license assets owned by a collaborator in order to determine whether we have a variable interest via the license agreement with the collaborator and if the variable interest is a variable interest in the collaborator as a whole. In connection with this assessment, we consider and make judgments regarding the following, among other factors: (1) whether the collaborator is a business; (2) the purpose and design of the collaborator; (3) the value of the asset as compared to the value of the collaborator as a whole; and (4) which party has the power to direct the activities that most significantly affect the collaborator’s economic performance. For example, in connection with the Parion collaboration we determined that (a) Parion is a business; (b) the purpose and redesign of Parion was to advance the development and commercialization of the licensed assets with a company that is able to effectively develop and commercialize products for the treatment of cystic fibrosis and other pulmonary diseases; (c) the licensed assets represented significantly more than half the value of Parion; and (d) through the joint steering committee, we have the power to direct the development and commercialization of Parion’s ENaC inhibitors, which are the activities that most significantly affect the economic performance of Parion. Based on this analysis, we consolidate Parion’s financial statements into our financial statements. Similarly, we have determined that BioAxone is a VIE that we consolidate into our financial statements.

We evaluate on a quarterly basis if we continue to have a variable interest in each VIE and are the primary beneficiary of the VIE, and if we later determine that we no longer have a variable interest or are no longer the primary beneficiary, we deconsolidate the applicable VIE. This evaluation involves an assessment of the activities being conducted pursuant to our collaboration agreement with the collaborator, the collaborator’s financial statements, discussions with the collaborator’s management regarding its other activities, including any new collaborations, financing activities, clinical data and the collaborator’s other programs.

We believe that the following effects of the consolidation and deconsolidation of VIEs on our consolidated financial statements are the most significant:

•

In each period, we record net income (loss) attributable to our VIEs noncontrolling interest. This net income (loss) reflects our VIEs net income (loss) for the period as adjusted for gains and losses in the fair value of the contingent payments, which consist of milestone, royalty and option payments, payable by us to our VIEs. Determining the fair value of the contingent payments payable by us to our VIEs requires us to make significant estimates regarding the probability and potential timing of achieving each of the milestones pursuant to the agreement, future potential net sales of licensed products and appropriate discount rates. We expect that the net income (loss) attributed to noncontrolling interest will continue to be affected by changes in the fair value of the contingent payments. In 2016, 2015 and 2014, the fair value of contingent payments payable by us increased by $54.9 million, $4.5 million and $0.5 million, respectively. The increase in fair value of the contingent payments in 2016 primarily related to a Phase 2 clinical trial of VX-371, a compound in-licensed from Parion, achieving its primary safety endpoint in the second quarter of 2016. The increases in the fair value of contingent payments increased our net loss attributable to Vertex on a dollar-for-dollar basis.

•

We recorded $255.3 million and $29.0 million, respectively, of intangible assets on our consolidated balance sheet based on our estimate of the fair value of Parion’s and BioAxone’s in-process research and development assets as of the transaction date and made significant estimates regarding: the probability of obtaining regulatory approval of licensed products; the timing and expected costs of clinical trials and other development activities; future potential cash flows from sales of drugs and the appropriate discount rates. If we are successful in developing a drug candidate, we will amortize the carrying value of the relevant intangible asset as part of cost of product revenues. We test these in-process research and development assets for impairment on an annual basis as of October 1, and more frequently if indicators are present or changes in circumstances suggest that impairment may exist. If the fair value of a licensed program becomes impaired as the result of safety or efficacy data from any ongoing or future clinical trial conducted by us or our competitors or because of any other information regarding the prospects of successfully developing or commercializing the licensed drug candidate, we could incur significant charges in the period in which the impairment occurs. We determined the fair value of these in-process research and development assets using probability-weighted present-value models.


•	The revenues and expenses of our VIEs that are unrelated to the programs that we in-license from our VIEs and that are consolidated into our financial statements are set forth in the table below and represent less than 1% of our revenues and expenses in each period:



	2016			2015			2014
	(in thousands)
Revenues	$	944		$	2,888		$	—
Research and development expenses	(6,762		)	(3,642		)	(286		)
Sales, general and administrative expenses	(4,160		)	(5,836		)	(491		)
Other (expenses) income, net	(108		)	(56		)	13
Loss attributable to noncontrolling interest before provision for income taxes	$	(10,086	)	$	(6,646	)	$	(764	)

To the extent that our VIEs pursue other programs, expenses related to those activities would be reflected in our research and development expenses and our sales, general and administrative expenses as a result of the financial statement consolidation. We would not be entitled to any benefits from those activities. In future periods, our VIEs could increase their operating expenses related to other activities and any such increases would affect our operating expenses as presented in our consolidated financial statements.

•

We reflect all of our VIEs' cash and cash equivalents under the heading “restricted cash and cash equivalents (VIE)” on our consolidated balance sheets. We do not have any rights to our VIEs cash or cash equivalents, these resources are not available to fund research and development programs pursuant to the collaborations and these amounts do not provide us with any additional liquidity. Our VIEs have control over the restricted cash and cash equivalents (VIE), including the ability to distribute the restricted cash and cash equivalents to their equity holders, and as a result, these assets, although carried on our consolidated balance sheets, are not included in the discussion of our liquidity and should be disregarded when evaluating our financial condition.

In order to account for the fair value of the intangible assets and contingent payments related to collaborations with our VIEs under GAAP, we use present-value models based on assumptions regarding the probability of achieving the relevant milestones, estimates regarding the timing of achieving the milestones, estimates of future product sales and the appropriate discount rates. We base our estimates of the probability of achieving the relevant milestones on industry data for similar assets and our own experience. The discount rates used in the valuation model represent a measure of credit risk and market risk associated with settling the liabilities. Significant judgment is used in determining the appropriateness of these assumptions during each reporting period. Changes in these assumptions could have a material effect on the fair value of the contingent payments and affect the analysis of whether or not an intangible asset is impaired.

Research and Development Accruals

Research and development expenses, including amounts funded through research and development collaborations, are expensed as incurred. When third-party service providers’ billing terms do not coincide with our period-end, we are required to make estimates of our obligations to those third parties, including clinical trial and pharmaceutical development costs, contractual services costs, costs for drug supply, marketing expenses and infrastructure expenses incurred in a given accounting period and record accruals at the end of the period. We base our estimates on our knowledge of the research and development programs, services performed for the period, experience with related activities and the expected duration of the third-party service contract, where applicable.

Commercial Supplies and Inventories

We began capitalizing the costs of our ORKAMBI inventories on July 1, 2014. We capitalize inventories produced in preparation for initiating sales of a drug candidate when the related drug candidate is considered to have a high likelihood of regulatory approval and the related costs are expected to be recoverable through sale of the inventories. In determining whether or not to capitalize such inventories, we evaluate, among other factors, information regarding the drug candidate’s safety and efficacy, the status of regulatory submissions and communications with regulatory authorities and the outlook for commercial sales, including the existence of current or anticipated competitive drugs and the availability of reimbursement. In addition, we evaluate risks associated with manufacturing the drug candidate and the remaining shelf life of the inventories. After we begin capitalizing inventories, we perform an assessment of the recoverability of capitalized inventory during each reporting period, and write down any excess and obsolete inventories to their net realizable value in the period in which the impairment is first identified. Periodic assessments of the recoverability of capitalized costs involve significant estimates and judgments on the part of management.

As of December 31, 2016, all of our inventories are related to KALYDECO and ORKAMBI.

Income Taxes

We maintain a valuation allowance on the majority of our net operating losses and other deferred tax assets because we have an extended history of annual losses. Our U.S. federal net operating loss carryforwards totaled approximately $4.1 billion as of December 31, 2016. On an annual basis, we reassess the valuation allowance for deferred income tax assets. After consideration of all the evidence, both positive and negative, we continue to maintain a valuation allowance on the deferred tax asset as of December 31, 2016 because it is more likely than not that the deferred tax asset will not be realized. In future periods, if we determine that it is more likely than not that the deferred tax asset will be realized, (i) the valuation allowance would be decreased, (ii) the deferred tax asset would be reflected on our consolidated balance sheet and (iii) we would record non-cash benefits in our consolidated statements of operations related to the reflection of the deferred tax asset on our consolidated balance sheet.

Leases

In 2011, we entered into two leases for our corporate headquarters. Our corporate headquarters were built during the period from 2011 through December 2013. We lease our corporate headquarters pursuant to leases that expire in 2028, subject to our right to extend the leases for an additional 10 years. Because we were involved in the construction project, we were deemed for accounting purposes to be the owner of the buildings during the construction period. Accordingly, we record project construction costs incurred by the landlord as an asset and a related financing obligation in “Property and equipment, net” and “Construction financing lease obligation,” respectively, on our consolidated balance sheets.

Upon completion of the construction of the corporate headquarters buildings, we evaluated the leases and determined that the leases did not meet the criteria for “sale-leaseback” treatment. Accordingly, we depreciate the asset and incur interest expense related to the financing obligation recorded on our balance sheet. We bifurcate our lease payments pursuant to the leases into (i) a portion that is allocated to the buildings and (ii) a portion that is allocated to the land on which the buildings were constructed. The portion of the lease obligations allocated to the land is treated as an operating lease. In connection with the leases for our corporate headquarters, we incurred $60.2 million in interest expense, $13.3 million in depreciation expense and $6.5 million in operating expense in 2016. In 2017, we expect interest expense, depreciation expense and operating expenses related to the leases for our corporate headquarters to be approximately consistent with that from 2016.

In 2015, we entered into a lease agreement for a research and development facility to be built in San Diego. Because we are involved in the construction project, we are deemed for accounting purposes to be the owner of the building during the construction period and are recording project construction costs incurred by the landlord. We will need to evaluate this lease based on “s