| Item 1. | Security and Issuer |
| (a) | Title of Class of Securities:
Common Stock, Par Value $.10 Per Share |
| (b) | Name of Issuer:
MasTec, Inc. |
| (c) | Address of Issuer's Principal Executive Offices:
800 S. Douglas Road, 12th Floor, Coral Gables,
FLORIDA
, 33134. |
| Item 3. | Source and Amount of Funds or Other Consideration |
| | Share ownership by each of the persons reporting on this Schedule 13D reflect transfers among certain of the reporting persons as well as grants of equity compensation to Mr. Mas since November 19, 2019, all as previously reported on Forms 4 filed by Mr. Mas. |
| Item 4. | Purpose of Transaction |
| | The purpose of this filing to is report entry by Jose Ramon Mas on August 10, 2026 into an amendment (the "Fourth Amendment") to the previously reported prepaid variable forward sale contract entered into by Jose Ramon Mas with an unaffiliated party (the "JR 2019 Prepaid Forward Contract," and, as amended to date, the "Prepaid Forward Contract"). The Fourth Amendment amends the Floor Price (as defined below) and Cap Price (as defined below) for each Tranche 2 Component (as defined below), which were determined based on the volume weighted average price (the "VWAP") of MasTec, Inc.'s common stock for a specified period ended on August 11, 2026.
The Prepaid Forward Contract provides for the settlement of the transaction, at the option of Jose Ramon Mas, in cash or in Shares. At settlement Jose Ramon Mas will be obligated to deliver to the buyer, on the applicable date in August or September 2027 or 2028 for the applicable component (each, a "Valuation Date") in the first ("Tranche 1") or second ("Tranche 2") tranche, as applicable, of 15 components each ("Tranche 1 Components" or "Tranche 2 Components"), at Jose Ramon Mas's option, up to 100% of the number of Shares pledged for such component or an equivalent amount of cash. Jose Ramon Mas entered into the JR 2019 Prepaid Forward Contract to provide funds for investment in the Miami Major League Soccer franchise. For more information on the terms of the Prepaid Forward Contract, please see Item 6 below. |
| Item 5. | Interest in Securities of the Issuer |
| (a) | By Jose Ramon Mas: 6,185,090, 7.7%. The Shares beneficially owned by Jose Ramon Mas include: 3,254,461 Shares owned by Jose Ramon Mas individually; 1,280,688 Shares owned by JRM Holdings I, which is controlled by JRM Holdings, of which Jose Ramon Mas is the sole member; 848,941 Shares owned by the JM Trust of which Jose Ramon Mas is a trustee; 425,000 Shares owned by the JR Trust of which Patricia Mas, the wife of Jose Ramon Mas, is a trustee; 276,000 Shares owned by Mas Partners III, a Delaware limited liability company, in which Jose Ramon Mas is a member; and 100,000 Shares owned by the Family Foundation, a Florida not-for-profit corporation, of which Jose Ramon Mas is the secretary and a member of the Board of Directors. Jose Ramon Mas disclaims beneficial ownership of all Shares of common stock held by the JM Trust, the JR Trust and the Family Foundation, except, in each case, to the extent of his pecuniary interest therein. 340,794 Shares of Common Stock owned by Jose Ramon Mas individually are subject to the Prepaid Forward Contract and are pledged as collateral to secure Jose Ramon Mas's obligations under such Prepaid Forward Contract.
By JRM Holdings I: 1,280,688, 1.6%
By JRM Holdings: 1,280,688, 1.6%
By JM Trust: 848,941, 1.1%
By JR Trust: 425,000, 0.5%
By Mas Partners III: 276,000, 0.3%
By Family Foundation: 100,000, 0.1%
The percentage of beneficial ownership is based upon 80,304,948 Shares of Common Stock outstanding as of July 27, 2026. |
| (b) | The Reporting Person's responses to cover page Items 7 through 10 of this 13D/A are hereby incorporated by reference in this Item 5. |
| (c) | The Reporting Person's responses to Items 4(a) and 6(a) of this 13D/A are hereby incorporated by reference in this Item 5. |
| (e) | N/A |
| Item 6. | Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer |
| | 340,794 Shares owned by Jose Ramon Mas are covered by the Prepaid Forward Contract. The Prepaid Forward Contract obligates Jose Ramon Mas to deliver to the buyer under the Prepaid Forward Contract, on each Valuation Date, at Jose Ramon Mas's option, up to 100% of the number of Shares pledged for the applicable component or an equivalent amount of cash. Jose Ramon Mas pledged an aggregate of 340,794 Shares (the "Pledged Shares") of MasTec, Inc. common stock to secure his obligations under the Prepaid Forward Contract, and currently retains ownership and voting rights in the Pledged Shares during the term of the pledge. The number of Shares to be potentially delivered to the buyer on each Valuation Date (or on which to base the amount of cash to be delivered to the buyer on such Valuation Date) is to be determined as follows: (a) if the VWAP of Shares on the Valuation Date for the applicable Tranche 1 Component or Tranche 2 Component (each, a "Valuation Price") is less than or equal to $246.5096 (the "Tranche 1 Floor Price") or $157.3441 (the "Tranche 2 Floor Price," and each of the Tranche 1 Floor Price and Tranche 2 Floor Price, a "Floor Price"), respectively, then Jose Ramon Mas will deliver to the buyer all of the Pledged Shares for the applicable component; (b) if such Valuation Price for the Tranche 1 Component or Tranche 2 Component is greater than the Tranche 1 Floor Price or Tranche 2 Floor Price, respectively, but less than or equal to $350.5914 (the "Tranche 1 Cap Price") or $243.0093 (the "Tranche 2 Cap Price," and each of the Tranche 1 Cap Price and Tranche 2 Cap Price, a "Cap Price"), respectively, then Jose Ramon Mas will deliver to the buyer the number of Shares equal to 100% of the Pledged Shares for the applicable component multiplied by the quotient of the applicable Floor Price divided by such Valuation Price and (c) if such Valuation Price for the Tranche 1 Component or Tranche 2 Component exceeds the Tranche 1 Cap Price or Tranche 2 Cap Price, respectively, then Jose Ramon Mas will deliver to the buyer the number of Shares equal to 100% of Pledged Shares for the applicable component multiplied by the quotient of (x) the applicable Floor Price plus such excess divided by (y) such Valuation Price. Except as set forth above, Jose Ramon Mas retains beneficial ownership of the Pledged Shares and rights related thereto, including voting power with respect thereto. |
| Item 7. | Material to be Filed as Exhibits. |
| | Exhibit 99.1 Variable Share Forward Transaction Amendment No. 4 Agreement dated August 10, 2026 by and between Jose Ramon Mas and Bank of America, N.A. |
