StockCIK 1035983
COMFORT SYSTEMS USA INC (FIX): Insider Trades and Fund Holdings
In the past 12 months, COMFORT SYSTEMS USA INC insiders reported 0 open-market purchases worth $0 and 2 sales worth $30.5M; 0 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$30.5MSold by insiders, 12 months
4Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Aug 27, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Aug 27 | Brian E. LaneCEO | ▼ SELL | $25.8M |
| Aug 18 | William George IIICFO | ▼ SELL | $4.75M |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Brian E. Lane | CEO | 0 | $0 | 1 | $25.8M |
| William George III | CFO | 0 | $0 | 1 | $4.75M |
Tracked funds that report FIX
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 76,160 | $150.9M | ▲ +34.4% |
| Bridgewater Associates | 48,506 | $96.1M | ▼ −43.9% |
| Coatue Management | 17,793 | $35.3M | ▲ New |
| Markel Group | 13,000 | $25.8M | No change |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →