Comfort Systems USA Inc
Ownership
Ownership Structure
Who owns Comfort Systems USA Inc (FIX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 9.98 | 3,512,927 | +1.9 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.50 | 2,285,949 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.35 | 1,881,184 | +0.0 | 03/31/2026 |
| State Street Corp | 4.18 | 1,471,879 | +3.0 | 03/31/2026 |
| FMR Inc | 4.12 | 1,449,517 | -13.2 | 03/31/2026 |
| Geode Capital Management, LLC | 3.52 | 1,238,619 | +4.4 | 03/31/2026 |
| AQR Capital Management LLC | 3.17 | 1,116,230 | +9.4 | 03/31/2026 |
| JPMorgan Chase & Co | 2.53 | 889,891 | +25.9 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 1,120,778 | +0.3 | 07/31/2026 |
| Vanguard 500 Index Investor | 2.62 | 923,752 | +1.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Lane Brian E. | CHIEF EXECUTIVE OFF. | 145,065 | 228,332,310 $ | Aug 26, 2026 | direct |
| Myers Franklin | Director | 67,110 | 105,631,140 $ | Aug 10, 2026 | both |
| George William Iii | CHIEF FINANCIAL OFFICER | 30,250 | 47,613,500 $ | Aug 17, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 26, 2026 | Lane Brian E. | CHIEF EXECUTIVE OFF. | Sell | 16,024 | 1,608.21 | 25,769,923 |
| Aug 17, 2026 | George William Iii | CHIEF FINANCIAL OFFICER | Sell | 2,554 | 1,859.65 | 4,749,549 |
| Aug 11, 2026 | Myers Franklin | Director | Sell | 4,000 | 1,693.92 | 6,775,691 |
| Aug 10, 2026 | Myers Franklin | Director | Sell | 3,500 | 1,690.47 | 5,916,647 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.