As of November 6, 2026, MasTec, Inc. is a publicly traded company (NYSE: MTZ). The largest holder reporting an active stake on Schedule 13D is Jorge Mas, a director, at 14.8%. No bankruptcy or receivership appears in its SEC Form 8-K filings. Founder or officer holdings: Jose Mas, the executive officer and a director (7.7%). Passive holders reporting on Schedule 13G include BlackRock (8.1%) (Schedule 13D/A, August 13, 2026).
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Is MasTec, Inc. a real, registered company?
- MasTec, Inc. files with the SEC under CIK 15615 (its SEC filings).
- Its shares are listed under the ticker MTZ on NYSE (SEC company record).
- Incorporated in Florida; business address in Coral Gables, Florida, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under MASTEC INC in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Alexander Benjamin Spiro, Director (Form 8-K filed 2026-07-30). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Jorge Mas (filed 2026-08-13).
Who are MasTec, Inc.'s owners and officers?
MasTec, Inc.: incorporated in Florida; business address in Coral Gables, Florida; industry Water, Sewer, Pipeline, Comm & Power Line Construction (Schedule 13D/A, 2026-08-13).
Officers and directors, each with the role and the filing that names them:
- : Director (Form D, 2026-07-24)
- : Executive Officer, Director (Form D, 2026-07-24)
- : Executive Officer (Form D, 2026-07-24)
- : Executive Officer (Form D, 2026-07-24)
- : Executive Officer (Form D, 2026-07-24)
- : Director (Form D, 2026-07-24)
- : Director (Form D, 2026-07-24)
- : Director (Form D, 2026-07-24)
- : Director (Form D, 2026-07-24)
- : Director (Form D, 2026-07-24)
- : Director (Form D, 2026-07-24)
- : Director (Form D, 2026-07-24)
| Report | Holder | Share |
|---|---|---|
| Schedule 13D/A, 2026-08-13 | Jorge Mas | 14.8% |
| Schedule 13D/A, 2026-08-13 | Jose Ramon Mas | 7.7% |
| Schedule 13G/A, 2026-07-29 | Blackrock, Inc. | 8.1% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13D/A, 2025-08-22 | Jose Ramon Mas | 7.8% |
| Schedule 13D/A, 2025-08-22 | Jorge Mas | 15% |
Questions about who owns MasTec, Inc.
Who owns MasTec, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of MasTec, Inc.: Jorge Mas (14.8%, Schedule 13D/A, filed 2026-08-13), Blackrock, Inc. (8.1%, Schedule 13G/A, filed 2026-07-29) and Jose Ramon Mas (7.7%, Schedule 13D/A, filed 2026-08-13).
Who are the largest shareholders of MasTec, Inc.?
By the share each holder's latest filing reports, the largest holders of MasTec, Inc. on this page are Jorge Mas (14.8%), Blackrock, Inc. (8.1%) and Jose Ramon Mas (7.7%).
When did Jorge Mas buy into MasTec, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Jorge Mas on this page is the Schedule 13D/A, filed 2025-08-22, reporting 15%; its latest, Schedule 13D/A filed 2026-08-13, reports 14.8%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 6 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-07-30 | Alexander Benjamin Spiro | Director | appointed | |
| Form 8-K, 2026-07-07 | Manuel Benito Miranda | Director | appointed |
Which insiders own MasTec, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a director: 10,222,170 shares (12.7% of shares outstanding), 4,556,686 held directly and 5,665,484 indirectly (Form 4, 2026-03-20).
- , the chief executive and a director: 3,530,461 shares (4.4% of shares outstanding), 3,254,461 held directly and 276,000 indirectly (Form 4, 2026-03-20).
- , the chief operating officer: 195,659.37 shares (0.24% of shares outstanding), 183,591 held directly and 12,068.37 indirectly (Form 4, 2026-03-20).
- , the general counsel and executive vice president: 110,863.72 shares (0.14% of shares outstanding), 102,780 held directly and 8,083.72 indirectly (Form 4, 2026-03-20).
- , the chief financial officer: 76,639.93 shares (0.10% of shares outstanding), 66,627 held directly and 10,012.93 indirectly (Form 4, 2026-03-20).
Shares outstanding: 80,300,833 as of 2026-10-26, from the company's latest SEC cover page.
How much has MasTec, Inc. raised?
| Filed | Sold | Offered |
|---|---|---|
| Form D, 2026-07-24 | $484.45M | $484.45M |
Keep reading
More on MasTec, Inc. and the records around it.
MasTec, Inc. elsewhere on the record
- 5%+ stake filings Aug 2026
- Leadership changes Jul 2026
Companies that share a holder
- BlackRock, Inc. also filed stake reports on 1596 other companies: AvePoint, Inc. (Nov 2026), BIOMARIN PHARMACEUTICAL INC (Nov 2026), MSG RANGERS CORP (Nov 2026)
- The Vanguard Group also filed stake reports on 2384 other companies: BellRing Brands, Inc. (Sep 2026), CAL-MAINE FOODS INC (Sep 2026), FTAI Aviation Ltd. (Sep 2026)
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