MasTec, Inc. has 6 Schedule 13D or 13G filings on record since 2025-08-22. 3 holders' latest filing reports 5% or more of common stock, par value $.10 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Jorge Mas | 14.8% | 11,872,111 | SCHEDULE 13D/A, 2026-08-13 | 2026-08-11 |
| BlackRock, Inc. | 8.1% | 6,400,155 | SCHEDULE 13G/A, 2026-07-29 | 2026-06-30 |
| Jose Ramon Mas | 7.7% | 6,185,090 | SCHEDULE 13D/A, 2026-08-13 | 2026-08-11 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
Purpose of Transaction (Item 4)
Jose Ramon Mas
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 4 of the SCHEDULE 13D/A filed 2026-08-13
Jorge Mas
The purpose of this filing to is report the entry by JM Holdings I on August 10, 2026 into an amendment (the "Fourth Amendment") to the previously reported prepaid variable forward sale contract entered into by JM Holdings I with an unaffiliated party (the "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 1 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 JM Holdings I, in cash or in Shares. At settlement JM Holdings I 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 JM Holdings I's option, up to 100% of the number of Shares pledged for such component or an equivalent amount of cash. JM Holdings I entered into the 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 4 of the SCHEDULE 13D/A filed 2026-08-13
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-22 | Jose Ramon Mas | 7.8% | SCHEDULE 13D/A |
| 2025-08-22 | Jorge Mas | 15% | SCHEDULE 13D/A |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-07-29 | BlackRock, Inc. | 8.1% | SCHEDULE 13G/A |
| 2026-08-13 | Jose Ramon Mas | 7.7% | SCHEDULE 13D/A |
| 2026-08-13 | Jorge Mas | 14.8% | SCHEDULE 13D/A |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.