Quanta Services, Inc.

Item 5.02(d) Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On September 9, 2026, pursuant to the authority granted to the Board of Directors (the “Board”) by the Bylaws of Quanta Services, Inc. (“Quanta” or the “Company”), as amended and restated, the Board increased the size of the Board from ten to eleven directors and, upon the recommendation of the Governance and Nominating Committee of the Board, elected Ellen Rubin to serve as a director, filling the vacancy created by such increase. Ms. Rubin will serve as a director until the Company’s next annual meeting of stockholders or until her earlier resignation or removal or when a successor is duly elected and qualified. Ms. Rubin has been appointed to the Audit Committee and the Safety, Operations and Risk Committee of the Board. Ms. Rubin will participate in the same compensation program and receive the same other benefits as each of the Company’s non-employee directors. Specifically, for her service on the Board from her election through the end of the 2026-2027 director service year, Ms. Rubin will receive (i) a pro-rata annual cash retainers in the aggregate amount of approximately $105,000 for her service on the Board and committees of the Board and (ii) a pro-rata annual award of restricted stock units, which has a value of approximately $131,000 and vests in full upon conclusion of the director service year. Ms. Rubin has also entered into the Company’s standard indemnification agreement for directors and officers. Additional information regarding the Company’s non-employee director compensation program and the standard indemnification agreement are set forth in the Company’s definitive proxy statement for the Company’s 2026 annual meeting of stockholders, which was filed with the Securities and Exchange Commission on April 10, 2026. There are no arrangements or understandings between Ms. Rubin and any other person pursuant to which she was appointed as a director, and there are no transactions in which Ms. Rubin has a material interest that require disclosure under Item 404(a) of Regulation S-K, promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), nor are any such transactions currently proposed.

Item 7.01 Regulation FD Disclosure. On September 9, 2026, the Company issued a press release announcing the appointment of Ms. Rubin to the Board. A copy of the press release is furnished herewith as Exhibit 99.1. The information furnished in Item 7.01 of this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such a filing.