Comfort Systems USA, Inc.
Comfort Systems USA, Inc. (FIX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · FIX · as of Mar 31, 2025
Ownership Breakdown
656
Institutional Holders
▼ 31 vs Q4
$10.91B
Total Inst. Value
▼ $3.47B vs Q4
35.20M
Shares Outstanding
freeFloat 102.06%
33.85M
13F Shares Held
▼ 73,102 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
FIX largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. electrical work | 3.95M | 11.13% | 11.13% | $1.27T | May 2, 2025 | ▼ 958.8K |
VANGUARD GROUP INC electrical work | 3.80M | 10.70% | 10.70% | $1.23T | May 9, 2025 | ▲ 21.8K |
CAPITAL WORLD INVESTORS electrical work | 2.32M | 6.52% | 6.52% | $746.98B | May 12, 2025 | ▲ 170.3K |
FMR LLC electrical work | 1.42M | 4.01% | 4.01% | $459.08B | May 12, 2025 | ▼ 272.8K |
STATE STREET CORP electrical work | 1.11M | 3.13% | 3.13% | $358.17B | May 15, 2025 | ▲ 7.0K |
INVESCO LTD. electrical work | 1.00M | 2.83% | 2.83% | $323.66B | May 12, 2025 | ▼ 398.9K |
WESTFIELD CAPITAL MANAGEMENT CO LP electrical work | 889.6K | 2.50% | 2.50% | $286.76B | May 9, 2025 | ▲ 4.5K |
GEODE CAPITAL MANAGEMENT, LLC electrical work | 818.9K | 2.31% | 2.31% | $264.01B | May 13, 2025 | ▲ 49.3K |
FULLER & THALER ASSET MANAGEMENT, INC. electrical work | 645.4K | 1.82% | 1.82% | $208.04B | May 13, 2025 | ▼ 3.0K |
AQR CAPITAL MANAGEMENT LLC electrical work | 530.4K | 1.49% | 1.49% | $165.23B | May 15, 2025 | ▲ 273.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
27
Increased
+2.28M shares2
New Positions
first time holders21
Decreased
−2.51M shares0
Sold Out
fully exitedNet shares change (top 50)
223.9K
+2.28M / −2.51M
Net new holders
+8
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
FIX insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
9
Buy transactions
30
Sell transactions
0.30
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Hardy Rhoman J director | May 27, 2026 | Sale | 342 | $1900.08 | $649.8K | 1.9K | Form 4 ↗ |
MYERS FRANKLIN director | May 21, 2026 | Gift | 273 | — | — | 68.8K | Form 4 ↗ |
ANDERSON DARCY director | May 18, 2026 | Award | 105 | — | — | 18.1K | Form 4 ↗ |
MYERS FRANKLIN director | May 18, 2026 | Award | 105 | — | — | 69.1K | Form 4 ↗ |
BULLS HERMAN E director | May 18, 2026 | Award | 105 | — | — | 29.9K | Form 4 ↗ |
Hardy Rhoman J director | May 18, 2026 | Award | 105 | — | — | 2.2K | Form 4 ↗ |
Kapoor Gaurav director | May 18, 2026 | Award | 105 | — | — | 832 | Form 4 ↗ |
Mercado, Pablo G. director | May 18, 2026 | Award | 105 | — | — | 3.1K | Form 4 ↗ |
SANDBROOK WILLIAM J director | May 18, 2026 | Award | 105 | — | — | 7.8K | Form 4 ↗ |
Skidmore Constance Ellen director | May 18, 2026 | Award | 105 | — | — | 12.7K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Comfort Systems USA, Inc. (FIX) is primarily owned by institutional investors, who hold approximately 96.2% of total shares outstanding. Company insiders own approximately 0.00%, while retail and public investors account for the remaining 5.92%.
The largest institutional shareholder of Comfort Systems USA, Inc. is BLACKROCK, INC., holding approximately 3.95 million shares — equal to 11.13% of outstanding shares — as of March 31, 2025.
A total of 656 institutional investors currently hold FIX stock, with a combined institutional value of approximately $10.91 billion as of the most recent 13F filing period.
Frequently asked questions
FIX ownershipComfort Systems USA, Inc. (FIX) is primarily owned by institutional investors, who hold approximately 96.2% of shares. The largest shareholder is BLACKROCK, INC. with a 11.13% stake. Company insiders hold 0.00%. Data sourced from SEC Form 13F as of March 31, 2025.