MasTec
Engineers, builds and maintains communications, clean-energy, power-delivery and pipeline infrastructure.
$244.44
After-hours close+3.57 (+1.48%)
At close$240.87(−4.09%)
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Breakdown13F · Form 4
Institutions 120.94%Insiders 10.37%
A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.
Shares outstanding 80.30M · Float 61.94M · 77.1% free float
Institutions13F, as of Jun 30, 2026
945 holders · 97.12M shares · 191 new positions · 518 increased · 295 reduced · 82 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 7.64M | 9.51% | +328.9K | Aug 7, 2026 |
| Peconic Partners LLC | 3.68M | 4.58% | +100.0K | Aug 14, 2026 |
| Vanguard Capital Management LLC | 2.83M | 3.53% | +27.6K | Aug 13, 2026 |
| Vanguard Portfolio Management LLC | 2.81M | 3.50% | +42.1K | Aug 13, 2026 |
| State Street Corp | 2.24M | 2.80% | +375.0K | Aug 7, 2026 |
| Hill City Capital, LP | 2.16M | 2.68% | 0 | Aug 17, 2026 |
| Lone Pine Capital LLC | 1.35M | 1.68% | −185.9K | Aug 14, 2026 |
| Bank of America Corp /DE/ | 1.34M | 1.66% | +5.9K | Aug 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Jose Ramon Masincl. Jose Ramon Mas Holdings, LLC, Jose Ramon Mas Irrevocable Family Trust +4 more | 7.70% | 6.19M | 13D | Aug 13, 2026 ↗ |
| BlackRock, Inc. | 6.80% | 5.42M | 13G | Apr 17, 2025 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Jorge Mas | director | 4.56M | 5.67% | Mar 20, 2026 |
| Jose Ramon Mas | director, officer: CEO | 3.25M | 4.05% | Mar 20, 2026 |
| Robert E. Apple | officer: COO | 183.6K | 0.23% | Mar 20, 2026 |
| Alberto de Cardenas | officer: EVP, General Counsel | 102.8K | 0.13% | Mar 20, 2026 |
| Julia L. Johnson | director | 73.5K | 0.09% | Aug 18, 2026 |
| Paul DiMarco | officer: CFO | 66.6K | 0.08% | Mar 20, 2026 |
| C. Robert Campbell | director | 30.9K | 0.04% | Aug 18, 2026 |
| Robert J. Dwyer | director | 21.0K | 0.03% | Aug 18, 2026 |
| Ernst N. Csiszar | director | 10.9K | 0.01% | Aug 18, 2026 |
| Javier Alberto Palomarez | director | 10.8K | 0.01% | Aug 18, 2026 |
9 people have not refiled in the last 18 months (882.9K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jun 3, 2026 | Ernst N. Csiszardirector | Sale | 6,500 | $371.17 | 10,816 |
| May 4, 2026 | C. Robert Campbelldirector | Sale | 3,000 | $417.00 | 30,646 |
| Mar 25, 2026 | Javier Alberto Palomarezdirector | Sale | 950 | $325.43 | 10,592 |
| Mar 3, 2026 | Ernst N. Csiszardirector | Sale | 6,500 | $300.40 | 17,235 |
| Nov 3, 2025 | Timothy Michael Loveofficer: CAO | Sale | 1,929 | $206.15 | 9,757 |
| Sep 29, 2025 | C. Robert Campbelldirector | Sale | 2,000 | $210.39 | 33,277 |
| Sep 18, 2025 | Robert E. Appleofficer: COO | Sale · 2 lots | 10,000 | $200.44 | 184,249 |
| Sep 11, 2025 | C. Robert Campbelldirector | Sale | 3,000 | $190.39 | 35,277 |
CongressHouse and Senate disclosures
| Member | Type | Amount | Owner | Traded | Disclosed |
|---|---|---|---|---|---|
| Sen. Markwayne Mullin · OK | Sale | $15,001 – $50,000 | Joint | Feb 4, 2026 | Mar 2, 2026 ↗ |