Institutional Ownership
Mastec Inc
CUSIP 576323109COMMTZQ1 2026
13D / 13G Filings
25
Schedule 13D/13G on record
Beneficial Filers
10
Distinct reporting persons
Largest Stake
15.0%
Max % of class reported
Institutional Holders
788
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
25 filings · latest Aug 22, 2025
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Aug 22, 2025 | Jorge Mas | 13D/A | 15.0% | — | SEC |
| 2 | Aug 22, 2025 | Jose Ramon Mas | 13D/A | 7.8% | — | SEC |
| 3 | Apr 17, 2025 | Blackrock, Inc. | 13G/A | 6.8% | 5.42M | SEC |
| 4 | Feb 5, 2025 | Blackrock, Inc. | 13G/A | 9.2% | 7.29M | SEC |
| 5 | Nov 5, 2024 | Nordea Investment Management Ab | 13G | 2.5% | 1.99M | SEC |
| 6 | Sep 10, 2024 | Mas Jorge | 13D/A | 14.9% | 11.84M | SEC |
| 7 | Sep 10, 2024 | Mas Jose Ramon | 13D/A | 7.8% | 6.15M | SEC |
| 8 | Feb 13, 2024 | Vanguard Group Inc | 13G/A | 7.6% | 5.97M | SEC |
| 9 | Feb 6, 2024 | Nordea Investment Management Ab | 13G | 5.0% | 3.96M | SEC |
| 10 | Jan 26, 2024 | Blackrock Inc. | 13G/A | 6.9% | 5.43M | SEC |
15 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Mastec Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 7.31M | $2.35B |
| 2 | Peconic Partners LLC | 3.58M | $1.15B |
| 3 | Hill City Capital, LP | 2.15M | $693.35M |
| 4 | State Street Corp | 1.87M | $601.59M |
| 5 | Victory Capital Management Inc | 1.59M | $512.38M |
| 6 | Lone Pine Capital LLC | 1.53M | $492.60M |
| 7 | First Trust Advisors LP | 1.41M | $454.16M |
| 8 | Geode Capital Management, LLC | 1.37M | $441.49M |
| 9 | Bank Of America Corp /De/ | 1.33M | $427.94M |
| 10 | Hood River Capital Management LLC | 1.30M | $416.78M |