PWR: Other company developments

Item 8.01 Other Events On May 22, 2026, Quanta issued a press release announcing the election of Joseph Kim, a new independent director, to the Board of Directors at its 2026 Annual Meeting of Stockholders. On May 22, 2026, the Company also announced that the Board authorized a new stock repurchase program. The new repurchase program, which was effective as of May 21, 2026, authorizes the Company to purchase, from time to time up to $1.0 billion of its outstanding common stock. Repurchases may be implemented through open-market or privately negotiated transactions, at management’s discretion, based on market and business conditions, applicable contractual and legal requirements and other factors. Quanta is not obligated to acquire any specific amount of common stock, and the Board may modify or terminate the new repurchase program at any time at its sole discretion and without notice. Copies of the press releases are attached to this Current Report on Form 8-K as Exhibit 99.1 and Exhibit 99.2 and are incorporated herein by reference. Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Exhibit 99.1 Press Release of Quanta Services, Inc. dated May 22, 2026 99.2 Press Release of Quanta Services, Inc. dated May 22, 2026 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document) 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. Dated: May 27, 2026 Quanta Services, Inc. By: /s/ Donald C. Wayne Name: Donald C. Wayne Title: Executive Vice President and General Counsel