MasTec, Inc. (MTZ) Shareholders & Insider Trades
MasTec shareholders at a glance
The largest holder of MasTec stock is Jorge Mas14.25 %, with 11.4 million shares (14.25% of the company), worth about $2.75 billion as of September 25, 2026. The 10 largest holders together own 49.3%.
In Q2 2026, 949 institutional holdings reports listed shares worth $24.90 billion.
Insiders reported 65 transactions in the last two years: 17 sales worth $16.63 million and no purchases. The newest one on file is from May 4, 2026 (Campbell Charles Robert, Director).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 4, 2026.
MasTec, Inc.
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest MasTec shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Jorge Mas14.25 % | 11.4 million | 14.25% | $2.7B |
| BlackRock Advisors LLC | 6.8 million | 8.45% | $1.6B |
| José Mas6.177 % | 5.0 million | 6.18% | $1.2B |
| Peconic Partners LLC | 3.7 million | 4.58% | $882.0M |
| Vanguard Capital Management LLC | 2.8 million | 3.53% | $679.0M |
| Vanguard Portfolio Management LLC | 2.8 million | 3.50% | $674.0M |
| State Street Corporation | 2.2 million | 2.79% | $538.0M |
| Hill City Capital LP | 2.2 million | 2.68% | $517.0M |
| Lone Pine Capital LLC | 1.3 million | 1.68% | $323.0M |
| Merrill Lynch International | 1.3 million | 1.66% | $320.0M |
As of September 25, 2026.
MasTec institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 949 | – | $24.9B |
| Q1 2026 | 844 | 58.0 million | $18.6B |
| Q4 2025 | 729 | 58.8 million | $12.8B |
| Q3 2025 | 687 | 57.5 million | $12.2B |
| Q2 2025 | 629 | 56.4 million | $9.6B |
| Q1 2025 | 561 | 56.4 million | $6.6B |
| Q4 2024 | 566 | 58.1 million | $7.9B |
| Q3 2024 | 505 | 58.4 million | $7.2B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
MasTec insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Campbell Charles Robert | May 4, 2026 | Director | Sale at price 417.00 per share. | $1.3M |
| Palomarez Javier Alberto | Mar 25, 2026 | Director | Sale at price 325.43 per share. | $309,158 |
| De Cardenas Alberto Ignacio | Mar 18, 2026 | General Counsel | Stock Award(Grant) at price 0.00 per share. | – |
| Mas Jose Ramon | Mar 18, 2026 | Chief Executive Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Apple Robert E | Mar 18, 2026 | Chief Operating Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Dimarco Paul | Mar 18, 2026 | Chief Financial Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Mas Jorge | Mar 18, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Love Timothy Michael | Mar 17, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Csiszar Ernst N | Mar 3, 2026 | Director | Sale at price 300.40 per share. | $2.0M |
| Johnson Julia Louise | Feb 13, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Dwyer Robert J | Feb 13, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Parker Ava L | Feb 13, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
Newest 12 of 65 insider transactions in the last two years.
Questions and answers
Who owns the most MasTec stock?
Jorge Mas14.25 %, with 14.25% of the company (as of September 25, 2026). Next: BlackRock Advisors LLC (8.45%) and José Mas6.177 % (6.18%).
How many institutions own MasTec stock?
949 institutional holdings reports listed MasTec shares in Q2 2026 worth $24.90 billion.
Are MasTec insiders buying or selling the stock?
In the last two years insiders reported 17 sales and no purchases (65 transactions in all); the newest on file is from May 4, 2026.
