Results of Operations · Reg FD Disclosure

Securities and Exchange Commission nor incorporated by reference in any registration statement filed by the Company under the Securities Act of 1933, as amended. ITEM 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit Number Description 99.1 Press Release, August 3, 2017 2 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. MASTEC, INC. Date: August 3, 2017 By: /s/ Alberto de Cardenas Alberto de Cardenas Executive Vice President, General Counsel and Secretary 3 EXHIBIT INDEX Exhibit Number Description 99.1 Press Release, dated August 3, 2017 4