MTZ: Material agreement · Other company developments

Item 1.01 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 (the “Notes”). The Notes will pay interest semi-annually at a rate of 5.850% and will mature on September 30, 2036. The Notes were priced at 99.656%. The Company expects to close the Notes offering on August 17, 2026, subject to customary conditions. The Company intends to use the net proceeds from the offering to repay some or all of its $600 million term loan under its term loan agreement that matures on June 26, 2028 and to pay related fees and expenses. The Company intends to use any remaining net proceeds thereafter for general corporate purposes, which may include the repayment of existing indebtedness, including borrowings under MasTec’s senior unsecured credit facility. The Underwriting Agreement contains customary representations, warranties and agreements of the Company, conditions to closing, indemnification rights and obligations of the parties and termination provisions. The Company registered the Notes under the Securities Act of 1933, as amended, pursuant to a shelf registration statement on Form S-3 filed by the Company on February 28, 2025 (File No. 333-285425). The foregoing description of the Underwriting Agreement is only a summary and is qualified in its entirety by reference to the full text of the Underwriting Agreement, which is filed as Exhibit 1.1 t