The largest holder of Quanta Services stock is Vanguard Capital Management LLC, with 9.8 million shares (6.52% of the company), worth about $5.95 billion as of September 25, 2026. The 10 largest holders together own 37.2%.
In Q2 2026, 2,032 institutional holdings reports listed shares worth $95.90 billion.
Insiders reported 47 transactions in the last two years: 6 sales worth $137.54 million and no purchases. The newest one on file is from June 1, 2026 (Wyrsch Martha B., Director).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through June 1, 2026.

2026Q2
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Vanguard Capital Management LLC | 9.8 million | 6.52% | $6.0B |
| BlackRock Advisors LLC | 9.8 million | 6.49% | $5.9B |
| Vanguard Portfolio Management LLC | 6.9 million | 4.61% | $4.2B |
| State Street Corporation | 6.6 million | 4.38% | $4.0B |
| JPMorgan Investment Management, Inc. | 5.3 million | 3.53% | $3.2B |
| Peconic Partners LLC | 4.7 million | 3.14% | $2.9B |
| Geode Capital Management LLC | 3.5 million | 2.34% | $2.1B |
| Fidelity Management & Research Co. LLC | 3.5 million | 2.33% | $2.1B |
| Merrill Lynch International | 3.2 million | 2.11% | $1.9B |
| BlackRock Life Ltd. | 2.6 million | 1.75% | $1.6B |
As of September 25, 2026.
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 2,032 | – | $95.9B |
| Q1 2026 | 1,828 | 136.0 million | $74.2B |
| Q4 2025 | 1,696 | 141.0 million | $59.1B |
| Q3 2025 | 1,531 | 143.0 million | $59.0B |
| Q2 2025 | 1,469 | 139.0 million | $52.6B |
| Q1 2025 | 1,366 | 136.0 million | $34.5B |
| Q4 2024 | 1,365 | 137.0 million | $43.2B |
| Q3 2024 | 1,263 | 142.0 million | $42.2B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Wyrsch Martha B. | Jun 1, 2026 | Director | -- | – |
| Baxter Warner L | Jun 1, 2026 | Director | -- | – |
| Rowe Robert Scott | Jun 1, 2026 | Director | -- | – |
| Beneby Doyle Nolan | Jun 1, 2026 | Director | -- | – |
| Ladhani Holli C | Jun 1, 2026 | Director | -- | – |
| Jackman Worthing F | Jun 1, 2026 | Director | -- | – |
| Fried Bernard | Jun 1, 2026 | Director | -- | – |
| Fried Bernard | May 28, 2026 | Director | -- | – |
| Valentin Raul Javier | May 21, 2026 | Director | -- | – |
| Wyrsch Martha B. | May 11, 2026 | Director | Stock Gift at price 0.00 per share. | – |
| Austin Earl Charles Jr | May 5, 2026 | Chief Executive Officer | Sale at price 765.14 - 777.60 per share. | $120.2M |
| Austin Earl Charles Jr | May 5, 2026 | Chief Executive Officer | Stock Gift at price 0.00 per share. | – |
Newest 12 of 47 insider transactions in the last two years.
Vanguard Capital Management LLC, with 6.52% of the company (as of September 25, 2026). Next: BlackRock Advisors LLC (6.49%) and Vanguard Portfolio Management LLC (4.61%).
2,032 institutional holdings reports listed Quanta Services shares in Q2 2026 worth $95.90 billion.
In the last two years insiders reported 6 sales and no purchases (47 transactions in all); the newest on file is from June 1, 2026.