FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * JENSEN DERRICK A   2. Issuer Name and Ticker or Trading Symbol QUANTA SERVICES INC [PWR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) 2800 POST OAK BLVD., SUITE 2600 3. Date of Earliest Transaction (Month/Day/Year) 02/28/2018 (Street) HOUSTON, TX 77056-6175 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/28/2018   A   19,391 (1) A $ 0 213,433 D   Common Stock 02/28/2018   A   22,648 (2) A $ 0 236,081 D   Common Stock 02/28/2018   A   20,555 (3) A $ 0 256,636 D   Common Stock 02/28/2018   F   3,496 (4) D $ 35.04 253,140 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
JENSEN DERRICK A 2800 POST OAK BLVD., SUITE 2600 HOUSTON, TX 77056-6175			Chief Financial Officer

Signatures

/s/ Carolyn M. Campbell, Atty-in-Fact		03/02/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These shares represent restricted stock units that may be settled solely by the issuance of an equal number of shares of common stock of the Company. Achievement of the performance condition associated with these restricted stock units was certified by the Company's Compensation Committee as of the date in Column 2.
(2)	These shares represent the acquisition of common stock resulting from the vesting of earned performance units issued under the Company's 2011 Omnibus Equity Incentive Plan.
(3)	These shares represent restricted stock units that may be settled solely by the issuance of an equal number of shares of common stock of the Company and remain subject to vesting based on the passage of time and continued employment.
(4)	These shares were withheld to cover taxes associated with the vest of performance units and restricted stock units issued under the Company's 2011 Omnibus Equity Incentive Plan.

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