Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. The information required by

Entry into a Material Definitive Agreement. On August 17, 2026, MasTec, Inc., a Florida corporation (the “Company”), completed its previously announced public offering of $650.0 million aggregate principal amount of its 5.850% senior unsecured notes due 2036 (the “2036 Senior Notes”). The 2036 Senior Notes were issued on August 17, 2026, under an indenture dated as of June 5, 2009, by and among the Company, the Company’s subsidiaries party thereto, as guarantors, and U.S. Bank Trust Company,…

Other Events. On August 6, 2026, the Company issued a press release announcing the pricing of the Notes offering. Such press release is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Entry into a Material Definitive Agreement. On August 6, 2026, MasTec, Inc., a Florida corporation (the “Company”), entered into an Underwriting Agreement (the “Underwriting Agreement”) with PNC Capital Markets LLC, Truist Securities, Inc. and Wells Fargo Securities, LLC, as representatives of the underwriters named therein (the “Underwriters”), pursuant to which the Company agreed to issue and sell to the Underwriters $650,000,000 aggregate principal amount of 5.850% Senior Notes due 2036 (t…

Director — Alexander Benjamin Spiro: Mr. Alexander Benjamin Spiro was appointed as a Class III director to fill a vacancy following an increase in the Board size.

Results of Operations and Financial Condition. The information contained in

does not purport to be complete and is qualified in its entirety by reference to the New Term Loan Agreement. The New Term Loan Agreement was attached as Exhibit 10.1 to the Company’s Current Report on Form 8-K filed by the Company with the Securities and Exchange Commission (“ SEC ”) on July 7, 2026, the terms of which are incorporated by reference herein. Borrowing Under MasTec Credit Facility As previously reported, on July 7, 2026, the Company amended its existing amended and restated cre…

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

Unregistered Sales of Equity Securities. On July 7, 2026, the Company agreed to acquire Electrical Specialists, Inc., d/b/a the Superior Group (the “ Superior Group ”), pursuant to a Share Purchase Agreement (the “ Acquisition Agreement ”) among the Company, Superior Group, Stewshi Co., Inc., as the seller, and the shareholders and shareholder representative named therein. Upon consummation of the transactions contemplated by the Acquisition Agreement (the “ Acquisition ”), the Superior Group…

Entry into a Material Definitive Agreement. New Term Loan Agreement On July 7, 2026, MasTec, Inc. (the “ Company ”) and MasTec North America, Inc., a subsidiary of the Company (“ MasTec North America ”), entered into a new senior unsecured delayed draw term loan agreement (the “ New Term Loan Agreement ”) by and among the Company and MasTec North America, as borrowers, Bank of America, N.A., as Administrative Agent, and the other lenders party thereto, which provides for $700 million in delay…

Class II director and Compensation Committee member — Mr. Manuel Benito Miranda: Appointment of a new director to fill a vacancy following an increase in the board size.

Results of Operations and Financial Condition. The information contained in

Results of Operations and Financial Condition. The information contained in

Results of Operations and Financial Condition. The information contained in

Results of Operations and Financial Condition. The information contained in

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

Entry into a Material Definitive Agreement Amendment and Restatement of Existing Credit Agreement On June 26, 2025, MasTec, Inc. (the “Company”) and MasTec North America, Inc., a subsidiary of the Company (“MasTec North America”) entered into an Amended and Restated Credit Agreement (the “Amended and Restated Credit Agreement”), by and among the Company and MasTec North America, as borrowers, Bank of America, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, and the other le…

Results of Operations and Financial Condition. The information contained in

Results of Operations and Financial Condition. The information contained in

Results of Operations and Financial Condition. The information contained in

Results of Operations and Financial Condition. The information contained in

Other Events. Results of Early Participation in Tender Offer and Consent Solicitation On June 20, 2024, MasTec, Inc. (the “MasTec”) announced the early participation results of the previously announced solicitation of consents (the “Consent Solicitation”) by IEA Energy Services LLC (“IEA”), a wholly owned subsidiary of MasTec, to adopt certain proposed amendments to the indenture, dated as of August 17, 2021, as amended or supplemented as of the date hereof, among IEA, the guarantors from tim…

Entry into a Material Definitive Agreement. On June 10, 2024, MasTec, Inc., a Florida corporation (the “Company”), completed its previously announced public offering of $550.0 million aggregate principal amount of its 5.900% senior unsecured notes due 2029 (the “2029 Senior Notes”). The 2029 Senior Notes were issued on June 10, 2024, under an indenture dated as of June 5, 2009, by and among the Company, the Company’s subsidiaries party thereto, as guarantors, and U.S. Bank Trust Company, Nati…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. The information required by

Other Events. On June 5, 2024, the Company issued a press release announcing the pricing of the Notes offering. Such press release is attached hereto as Exhibit 99.1 and incorporated herein by reference.