As of October 27, 2026, Comfort Systems USA Inc. is a publicly traded company (NYSE: FIX); its largest reported holder is BlackRock, with 8.3% on Schedule 13G/A of January 21, 2026, then Vanguard (7.49%). The largest insider holding is Brian E. Lane, the chief executive and a director, with 145,065 shares (0.41% of shares outstanding), per Form 4 of August 27, 2026 (Schedule 13G/A, January 21, 2026).
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Is Comfort Systems USA Inc. a real, registered company?
- Comfort Systems USA Inc files with the SEC under CIK 1035983 (its SEC filings).
- Its shares are listed under the ticker FIX on NYSE (SEC company record).
- business address in Houston, Texas, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under COMFORT SYSTEMS USA INC in our court records and SEC 8-K records (as of 2026-10-27).
- Leadership changes: the latest reported is William George, Chief Financial Officer (Form 8-K filed 2026-10-22). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Vanguard (filed 2026-04-29).
Who are Comfort Systems USA Inc.'s owners and officers?
Comfort Systems USA Inc.: business address in Houston, Texas; industry Electrical Work (Form D, 2026-10-22).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-05-06 | Fmr LLC | 4.1% |
| Schedule 13G, 2026-04-29 | Vanguard Portfolio Management | 5.37% |
| Schedule 13G, 2026-04-29 | Vanguard Capital Management | 7.49% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-02-13 | Capital World Investors | 4.7% |
| Schedule 13G/A, 2026-01-30 | The Vanguard Group | 12.21% |
| Schedule 13G/A, 2026-01-21 | Blackrock, Inc. | 8.3% |
| Schedule 13G/A, 2025-12-04 | Blackrock, Inc. | 10.8% |
| Schedule 13G/A, 2025-11-13 | Capital World Investors | 5.1% |
| Schedule 13G, 2025-11-05 | Fmr LLC | 5.4% |
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Who Pays Them, And Who They Are Up Against
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-10-22 | William George | Chief Financial Officer | departed | |
| Form 8-K, 2026-10-22 | Julie Shaeff | Chief Financial Officer | appointed |
Which insiders own Comfort Systems USA Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive and a director: 145,065 shares (0.41% of shares outstanding) (Form 4, 2026-08-27).
- , a director: 67,110 shares (0.19% of shares outstanding), 58,615 held directly and 8,495 indirectly (Form 4, 2026-08-12).
- , the chief financial officer: 30,250 shares (0.09% of shares outstanding) (Form 4, 2026-08-18).
- , a director: 29,879 shares (0.09% of shares outstanding) (Form 4, 2026-05-19).
- , the president and chief operating officer: 22,346 shares (0.06% of shares outstanding) (Form 4, 2026-04-03).
Shares outstanding: 34,985,904 as of 2026-10-16, from the company's latest SEC cover page.
How much has Comfort Systems USA Inc. raised?
No fundraising or offering filing from Comfort Systems USA Inc. is on file with us.
Keep reading
More on Comfort Systems USA Inc. and the records around it.
Comfort Systems USA Inc. elsewhere on the record
- 5%+ stake filings May 2026
Companies that share a holder
- Capital World Investors also filed stake reports on 125 other companies: New Fortress Energy Inc. (Oct 2026), Aura Minerals Inc. (Oct 2026), Skyworks Solutions, Inc. (Oct 2026)
- FMR LLC also filed stake reports on 713 other companies: ALLEGRO MICROSYSTEMS INC (Oct 2026), ASTERA LABS INC (Oct 2026), BRP INC (Oct 2026)
- Vanguard Portfolio Management also filed stake reports on 910 other companies: Innovative Industrial Properties Inc (Sep 2026), Macerich Co/The (Sep 2026), Signet Jewelers Ltd (Sep 2026)
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