Comfort Systems USA Inc
FIX- Exchange
- NYSE
- Industry
- Electrical Work
- SEC CIK
- 0001035983
In the last 90 days, Comfort Systems USA Inc insiders filed 0 open-market purchases and 3 sales; 1,357 institutions reported holding it in 13F filings for Q2 2026, worth $64.6B in total; superinvestors Coatue Management and Markel Group hold it.
Holders of 5% or more of FIX
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Comfort Systems USA Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 9.40%3.35M shares | – | Apr 24, 20251 filing | Apr 24, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
1 Schedule 13D or 13G filing on Comfort Systems USA Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Dec 4, 20252:24 PM ET | BlackRock, Inc. | 13G/A | 10.80%3.80M shares | +1.40 ppfrom 9.40% | Nov 30, 2025 | SEC |
| Nov 13, 20257:06 PM ET | Capital World Investors | 13G/A | 5.10%1.80M shares | – | Sep 30, 2025 | SEC |
| Apr 24, 20259:20 AM ET | BlackRock, Inc. | 13G/A | 9.40%3.35M shares | – | Mar 31, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Comfort Systems USA Inc shares.
No Form 144 notices for Comfort Systems USA Inc are on file.