Longboard Pharmaceuticals, Inc. (Nasdaq: LBPH), a clinical-stage biopharmaceutical company focused on developing novel, transformative medicines for neurological diseases, today announced the closing of its previously announced underwritten public offering of 11,500,000 shares of its voting common stock, including 1,500,000 shares sold pursuant to the exercise in full of the underwriters’ option to purchase additional shares, at a price to the public of $21.00 per share. The gross proceeds to Longboard from the offering, before deducting underwriting discounts and commissions and estimated offering expenses, are approximately $241.5 million.

Cantor and Citigroup acted as joint lead book-running managers for the offering, and Wedbush PacGrow and H.C. Wainwright & Co. acted as lead managers for the offering.

The offering was made pursuant to two shelf registration statements on Form S-3, including base prospectuses, which were previously filed with the Securities and Exchange Commission (the “SEC”) and declared effective on October 11, 2022 and August 11, 2023, respectively, as well as a related registration statement on Form S-3MEF. A preliminary prospectus supplement and accompanying prospectuses relating to the offering were filed with the SEC and are available for free on the SEC’s website located at http://www.sec.gov. A final prospectus supplement and accompanying prospectuses relating to the offering were filed with the SEC and are available for free on the SEC’s website located at http://www.sec.gov. Copies of the final prospectus supplement and the accompanying prospectuses relating to the offering may be obtained from: Cantor Fitzgerald & Co., Attention: Capital Markets, 110 East 59th Street, New York, NY 10022, or by e-mail at prospectus@cantor.com; or Citigroup, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717 or by telephone at (800) 831-9146.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy, nor shall there be any sale of, these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About Longboard Pharmaceuticals

Longboard Pharmaceuticals, Inc. is a clinical-stage biopharmaceutical company focused on developing novel, transformative medicines for neurological diseases. Longboard is working to advance a portfolio of centrally acting product candidates designed to be highly selective for specific G protein-coupled receptors (GPCRs). Longboard’s small molecule product candidates are based on more than 20 years of GPCR research. Longboard plans to advance bexicaserin (LP352), an oral, centrally acting 5-hydroxytryptamine 2C (5-HT2C) receptor superagonist, with no observed impact on 5-HT2B and 5-HT2A receptor subtypes, into a global Phase 3 program. In January 2024, Longboard reported topline data from a Phase 1b/2a clinical trial, the PACIFIC Study, evaluating bexicaserin in participants ages 12 to 65 years old with a broad range of Developmental and Epileptic Encephalopathies (DEEs), including Lennox-Gastaut syndrome, Dravet syndrome and other DEEs. Longboard is also evaluating LP659, an oral, centrally acting, sphingosine-1-phosphate (S1P) receptor subtypes 1 and 5 modulator, which is in development for the potential treatment of rare neuroinflammatory conditions. Longboard has initiated a Phase 1 single-ascending dose (SAD) clinical trial for LP659 in healthy volunteers, with topline data expected in the first half of 2024.

Forward-Looking Statements

Statements contained in this press release regarding matters that are not historical facts are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements include statements regarding expected timing for topline data. Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. Words such as “expects” are intended to identify forward-looking statements. These forward-looking statements are based upon Longboard’s current expectations and involve assumptions that may never materialize or may prove to be incorrect. Actual results could differ materially from those anticipated in such forward-looking statements as a result of various risks and uncertainties, which include, without limitation, risks and uncertainties associated with Longboard’s ongoing and planned clinical trials and its business in general and the other risks described in Longboard’s filings with the SEC, including under the heading “Risk Factors” contained therein. All forward-looking statements contained in this press release speak only as of the date on which they were made and are based on management’s assumptions and estimates as of such date. Longboard undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made, except as required by law.

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