EXPLANATORY NOTE (Form 8-K)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 31, 2026

MASTEC, INC.

(Exact Name of Registrant as Specified in Its Charter)

Florida		001-08106		65-0829355
(State or Other Jurisdiction of Incorporation)		(Commission File Number)		(IRS Employer Identification No.)

800 S. Douglas Road, 12th Floor

Coral Gables, Florida 33134

(Address of Principal Executive Office)

Registrant's telephone number, including area code (305) 599-1800

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading symbol(s)		Name of each exchange on which registered
Common Stock, $0.10 Par Value		MTZ		New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

EXPLANATORY NOTE

This Current Report on Form 8-K (the "Form 8-K") is being filed by MasTec, Inc., a Florida corporation, solely for the purpose of filing Exhibit 5.1 and Exhibit 23.1 (included in Exhibit 5.1) to the Form 8-K.

ITEM 9.01

Financial Statements and Exhibits.

(d) Exhibits

Exhibit Number		Description
5.1		Opinion of Holland & Knight LLP.
23.1		Consent of Holland & Knight LLP (included in Exhibit 5.1).
104		The cover page of MasTec, Inc.'s Current Report on Form 8-K, formatted in Inline XBRL (included with the Exhibit 101 attachments).

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: July 31, 2026				By:		/s/ Alberto de Cardenas
						Alberto de Cardenas
						Executive Vice President, General Counsel and Secretary