shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the e…

General Counsel, Chief Compliance Officer and Corporate Secretary — Mark D. Wolf: Mr. Wolf intends to retire later this year but will assist in the transition.

Entry into a Material Definitive Agreement. On July 2, 2026, Sterling Infrastructure, Inc. (the “Company”), as borrower, and certain of its subsidiaries, as guarantors (the “Subsidiary Guarantors”), entered into a Second Amended and Restated Credit Agreement, dated as of July 2, 2026 (the “Amended Credit Agreement”), with the financial institutions party thereto as lenders (the “Lenders”) and BMO Bank N.A., as administrative agent for the Lenders (the “Agent”), which amends and restates that…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

Regulation FD Disclosure. On June 9, 2026, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing that it has closed on the acquisition of Stone Ridge Contracting, LLC., a Pocatello, Idaho-based site development contractor. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information set forth in Item 7.01, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of…

CEO — Joseph A. Cutillo: The CEO's employment contract was extended and he received a special grant of restricted stock units.

shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the e…

shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the e…

Other Events. On November 12, 2025, Sterling Infrastructure, Inc. (the "Company") issued a press release announcing that the Board of Directors (the "Board") of the Company authorized a stock repurchase program, effective today, to purchase $400 million of the Company’s outstanding common stock over the next 24 months. This stock repurchase program replaces the Company’s current stock repurchase program adopted by the Board in December 2023, which was set to expire on December 5, 2025. The pr…

shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the e…

Executive Vice President — Ronald A. Ballschmiede: The filing discloses a pre-announced retirement of an Executive Vice President, which constitutes an orderly succession rather than a sudden loss of a senior executive.

shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the e…

Director — B. Andrew Rose, David Schulz: The filing discloses the appointment of two new independent directors to expand the board, which is a routine governance action rather than a departure or executive change.

Unregistered Sales of Equity Securities. The information set forth under

Entry into a Material Definitive Agreement. On June 16, 2025 (the “Effective Date”), Sterling Infrastructure, Inc. (the “Company”, “we”, “us”, or “our”) and CEC Facilities, LLC, a Delaware limited liability company and wholly-owned subsidiary of the Company (“Purchaser”), entered into an Asset Purchase Agreement (the “Purchase Agreement”) with CEC Facilities Group, LLC, a Texas limited liability company (the “Seller”), MCEC, LLC, a Texas limited liability company and wholly-owned subsidiary o…

Regulation FD Disclosure. On June 17, 2025, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing the execution on June 16, 2025 of an Asset Purchase Agreement (the “Purchase Agreement”) by the Company and CEC Facilities, LLC, a Delaware limited liability company and wholly-owned subsidiary of the Company (“Purchaser”), CEC Facilities Group, LLC, a Texas limited liability company (the “Seller”), MCEC, LLC, a Texas limited liability company and wholly-owned subsidiary…

CFO — Nicholas Grindstaff: The filing discloses the appointment of an external candidate as CFO to succeed an interim executive who is retiring, representing a significant but planned leadership transition rather than a sudden loss.

Entry into a Material Definitive Agreement. On June 5, 2025, Sterling Infrastructure, Inc. (the “Company”), as borrower, and certain of its subsidiaries, as guarantors (the “Subsidiary Guarantors”), entered into an Amended and Restated Credit Agreement, dated as of June 5, 2025 (the “Amended Credit Agreement”), with the financial institutions party thereto as lenders (the “Lenders”) and BMO Bank N.A., as administrative agent for the Lenders (the “Agent”), which amends and restates that certai…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the e…

CFO — Sharon R. Villaverde: The CFO departed without cause and was replaced by an interim executive while a search for a permanent successor is underway, indicating a loss of a key senior officer.

shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the e…

Other Events. Since 2012, Sterling Infrastructure, Inc. (“Sterling”) has held a 50% ownership interest in Road and Highway Builders, LLC (“RHB”), with Rich Buenting holding the remaining 50% ownership interest. On December 31, 2024, both parties executed an amendment to the RHB operating agreement to ensure the continuation of this mutually beneficial relationship while addressing the evolving needs and interest of both parties. This amendment modified the way RHB would be dispositioned in th…

Chairman of the Board — Thomas M. White: The Chairman of the Board is retiring in an orderly manner with no disagreement, and the company is actively identifying a successor.

shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the e…