Comfort Systems USA
FIX · NYSE
Who owns FIX
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 39.2% of FIX’s shares.
- BlackRock Institutional Trust Company, N.A.6.9%
- Vanguard Capital Management, LLC6.5%
- Vanguard Portfolio Management, LLC5.3%
- Fidelity Management & Research Company LLC4.4%
- Next 6 largest institutions16.0%
- All other shareholders60.8%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 2.42M | 6.88% |
| Vanguard Capital Management, LLC | 2.30M | 6.53% |
| Vanguard Portfolio Management, LLC | 1.87M | 5.30% |
| Fidelity Management & Research Company LLC | 1.56M | 4.45% |
| State Street Investment Management (US) | 1.54M | 4.37% |
| Geode Capital Management, L.L.C. | 1.15M | 3.27% |
| AQR Capital Management, LLC | 1.06M | 3.01% |
| Capital World Investors | 720.24K | 2.05% |
| JP Morgan Asset Management | 694.76K | 1.97% |
| Norges Bank Investment Management (NBIM) | 471.56K | 1.34% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 1.12M | 3.18% |
| Vanguard 500 Index Fund | 923.75K | 2.63% |
| Vanguard Mid-Cap Index Fund | 761.85K | 2.16% |
| iShares Core S&P 500 ETF | 468.46K | 1.33% |
| Fidelity 500 Index Fund | 454.45K | 1.29% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $102.96M (13 trades) of FIX on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Lane Brian E. | Sale | 16.02K | $25.77M |
| GEORGE WILLIAM III | Sale | 2.55K | $4.75M |
| MYERS FRANKLIN | Sale | 4.00K | $6.78M |
| MYERS FRANKLIN | Sale | 3.50K | $5.92M |
| MYERS FRANKLIN | Sale | 6.70K | $13.09M |
| Hardy Rhoman J | Sale | 342 | $649.83K |
| MYERS FRANKLIN | Gift | 273 | — |
| Hardy Rhoman J | Award | 105 | — |
| Wallis-Lage Cindy L. | Award | 105 | — |
| Kapoor Gaurav | Award | 105 | — |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Alan ArmstrongSenator | Purchase | $1K–$15K | Mar 27, 2026 |
| Byron DonaldsHouse | Purchase | $1K–$15K | Dec 4, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 849.98K
- Days to cover
- 2.61
- % of shares outstanding
- 2.42%
- Average daily volume
- 325.65K
- Change since last report
- −0.9%
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