UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported):

May 30, 2018 (May 24, 2018)

QUANTA SERVICES, INC.

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of incorporation)

2800 Post Oak Boulevard, Suite 2600

Houston, Texas 77056

(Address of principal executive offices, including ZIP code)

(713) 629-7600

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

(e) On May 24, 2018, at the 2018 Annual Meeting of Stockholders of Quanta Services, Inc. (the “Company” or “Quanta”), Quanta’s stockholders approved Amendment No. 3 (the “Amendment”) to Quanta’s 2011 Omnibus Equity Incentive Plan (the “Omnibus Plan”), which increased the number of shares of Quanta Common Stock that may be issued thereunder by 1,550,000 shares, clarified the definition of a change in control used in the Omnibus Plan and restricted permitted transfers of awards. The foregoing description of the Amendment is qualified in its entirety by reference to the complete text of the Amendment and the Omnibus Plan, as amended, copies of which are included as exhibits to this Current Report on Form 8-K and are incorporated herein by reference.

(a) On May 24, 2018, Quanta held its 2018 Annual Meeting of Stockholders.

(b) The final voting results for the items that were presented for stockholder approval, recommendation or ratification at the annual meeting are set forth below. These items related to each proposal described in detail in the Company’s definitive proxy statement for the annual meeting, which was filed with the Securities and Exchange Commission on April 13, 2018. Unless otherwise indicated, all results presented below reflect the voting power of Quanta Common Stock and Series G Preferred Stock, voting together as a single class.

Election of Directors (Item 1)

The following nine director nominees were elected as directors of the Company to serve one-year terms expiring at the 2019 Annual Meeting of Stockholders. The vote totals for each director are set forth in the table below:

Advisory Vote on Executive Compensation (Item 2)

The advisory resolution approving the Company’s executive compensation as set forth in the proxy statement was approved, with the vote totals as set forth in the table below:

Ratification of Appointment of Independent Registered Public Accounting Firm (Item 3)

The appointment of PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm for fiscal year 2018 was ratified, with the vote totals as set forth in the table below:

Approval of Amendment to Quanta Services, Inc. 2011 Omnibus Equity Incentive Plan (Item 4)

The Amendment was approved, with the vote totals as set forth in the table below:

(d) Exhibits.

* Filed with this Current Report on Form 8-K

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.