Comfort Systems Usa, Inc. (FIX) Shareholders & Insider Trades
Comfort Systems Usa shareholders at a glance
The largest holder of Comfort Systems Usa stock is BlackRock Advisors LLC, with 2.8 million shares (8.01% of the company), worth about $4.36 billion as of September 25, 2026. The 10 largest holders together own 41.5%.
In Q2 2026, 1,413 institutional holdings reports listed shares worth $68.70 billion.
Insiders reported 78 transactions in the last two years: 45 sales worth $190.95 million and no purchases. The newest one on file is from May 11, 2026 (George Williamiii, Chief Financial Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 11, 2026.
Comfort Systems Usa, Inc.
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest Comfort Systems Usa shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 2.8 million | 8.01% | $4.4B |
| Vanguard Capital Management LLC | 2.3 million | 6.53% | $3.6B |
| Vanguard Portfolio Management LLC | 1.9 million | 5.30% | $2.9B |
| Fidelity Management & Research Co. LLC | 1.7 million | 4.70% | $2.6B |
| State Street Corporation | 1.5 million | 4.37% | $2.4B |
| Geode Capital Management LLC | 1.2 million | 3.27% | $1.8B |
| AQR Capital Management LLC | 1.1 million | 3.01% | $1.6B |
| JPMorgan Investment Management, Inc. | 838,417 | 2.38% | $1.3B |
| Capital Research & Management Co. (World Investors) | 720,244 | 2.05% | $1.1B |
| Invesco Advisers, Inc. | 658,314 | 1.87% | $1.0B |
As of September 25, 2026.
Comfort Systems Usa institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 1,413 | – | $68.7B |
| Q1 2026 | 1,252 | 32.5 million | $44.6B |
| Q4 2025 | 1,086 | 33.7 million | $31.4B |
| Q3 2025 | 927 | 34.3 million | $28.2B |
| Q2 2025 | 788 | 34.1 million | $18.3B |
| Q1 2025 | 669 | 34.1 million | $11.0B |
| Q4 2024 | 698 | 34.0 million | $14.4B |
| Q3 2024 | 621 | 33.6 million | $13.1B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
Comfort Systems Usa insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| George Williamiii | May 11, 2026 | Chief Financial Officer | Sale at price 1948.17 - 2020.96 per share. | $9.8M |
| Shaeff Julie S | May 11, 2026 | Officer | Sale at price 2000.37 per share. | $2.2M |
| Myers Franklin | May 7, 2026 | Director | Stock Gift at price 0.00 per share. | – |
| Myers Franklin | May 7, 2026 | Director | Sale at price 1902.57 per share. | $8.6M |
| Lane Brian E | May 5, 2026 | Chief Executive Officer | Sale at price 1969.84 per share. | $21.9M |
| Mercado Pablo G | Apr 30, 2026 | Director | Sale at price 1779.78 per share. | $889,890 |
| Sandbrook William J | Apr 29, 2026 | Director | Sale at price 1732.67 per share. | $2.6M |
| Eslicker Rachel R. | Mar 23, 2026 | General Counsel | Stock Award(Grant) at price 0.00 per share. | – |
| Mckenna Trent Timothy | Mar 23, 2026 | President | Stock Award(Grant) at price 0.00 per share. | – |
| George Williamiii | Mar 23, 2026 | Chief Financial Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Reed Terrence M | Mar 23, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Shaeff Julie S | Mar 23, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
Newest 12 of 78 insider transactions in the last two years.
Questions and answers
Who owns the most Comfort Systems Usa stock?
BlackRock Advisors LLC, with 8.01% of the company (as of September 25, 2026). Next: Vanguard Capital Management LLC (6.53%) and Vanguard Portfolio Management LLC (5.30%).
How many institutions own Comfort Systems Usa stock?
1,413 institutional holdings reports listed Comfort Systems Usa shares in Q2 2026 worth $68.70 billion.
Are Comfort Systems Usa insiders buying or selling the stock?
In the last two years insiders reported 45 sales and no purchases (78 transactions in all); the newest on file is from May 11, 2026.
