Quanta Services authorizes $1B buyback and declares $0.11 quarterly dividend

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 2026 was ratified with the vote totals, rounded to the nearest whole share, as set forth in the table below: Number of Votes Cast For Number of Votes Cast Against Withhold /Abstentions Broker Non-Votes 125,199,372 8,114,219 67,276 —

Election of Directors (Item 1) The following ten director nominees were elected as directors of the Company to serve one-year terms expiring at the 2027 Annual Meeting of Stockholders. The vote totals for each director, rounded to the nearest whole share, are set forth in the table below: Nominee: Number of Votes Cast For Number of Votes Cast Against Withhold / Abstentions Broker Non-Votes Earl C. Austin, Jr. 121,035,028 481,029 57,777 11,807,033 Warner L. Baxter 119,732,272 1,600,979 240,583 11,807,033 Doyle N. Beneby 118,416,075 3,093,186 64,573 11,807,033 Bernard Fried 116,964,232 4,237,535 372,067 11,807,033 Worthing F. Jackman 106,953,127 14,239,457 381,249 11,807,033 Joseph Kim 121,230,587 279,793 63,454 11,807,033 Holli C. Ladhani 121,354,250 153,836 65,748 11,807,033 Jo-ann M. dePass Oslovsky 121,206,221 305,528 62,085 11,807,033 R. Scott Rowe 118,160,620 3,172,592 240,622 11,807,033 Martha B. Wyrsch 118,718,836 2,790,359 64,639 11,807,033

Advisory Vote on Executive Compensation (Item 2) The advisory resolution approving the Company’s executive compensation as set forth in the 2026 Proxy Statement was approved with the vote totals, rounded to the nearest whole share, as set forth in the table below: Number of Votes Cast For Number of Votes Cast Against Withhold / Abstentions Broker Non-Votes 114,220,186 7,122,529 231,119 11,807,033