Comfort Systems USA Inc

FIX

Exchange: NYSE
Industry: Electrical Work
SEC CIK: 0001035983

SEC filings (opens in a new tab)

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.

13F holders, Q3 2026

Institutional positions in Comfort Systems USA Inc as of Sep 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Q3 2026 data is still coming in (13F filing deadline: Nov 16, 2026), so these numbers are incomplete.

Institutional holders: 7; +2 vs. Q2 2026
Shares held: 48.8K; +46.7K (+2,231.4%) vs. Q2 2026
Total value: $3.23M; −$915.8K (−22.1%) vs. Q2 2026
New holders: 2; 3 more added
Sold out: 0; 1 more reduced

1,352 institutions that held it in Q2 2026 haven't filed for Q3 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting FIX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holders

Value held

Institutions holding FIX and their total value by quarter
Quarter	Holders	Value
Q2 2026	1,357	$64.6B
Q1 2026	1,206	$44.6B
Q4 2025	1,043	$31.1B
Q3 2025	888	$27.5B
Q2 2025	755	$18.1B
Q1 2025	632	$10.9B
Q4 2024	665	$14.4B
Q3 2024	591	$13.1B
Q2 2024	555	$10.5B
Q1 2024	505	$11.0B
Q4 2023	447	$7.16B
Q3 2023	400	$5.97B
Q2 2023	378	$5.62B
Q1 2023	348	$5.03B
Q4 2022	337	$3.92B
Q3 2022	299	$3.35B
Q2 2022	277	$2.88B
Q1 2022	280	$3.11B
Q4 2021	291	$3.41B
Q3 2021	269	$2.43B
Q2 2021	282	$2.67B
Q1 2021	252	$2.57B

Institutions, Q3 2026

Shares, value and share of portfolio for each institution holding Comfort Systems USA Inc; share changes are against Q2 2026.

Institutions holding FIX in Q3 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
OP Asset Management Ltd	–	–	–	–	Not filed
Fjarde Ap-Fonden /Fourth Swedish National Pension Fund	–	–	–	–	Not filed
E. Ohman J:or Asset Management AB	–	–	–	–	Not filed
TCW Group Inc	–	–	–	–	Not filed
CIBC Bancorp USA Inc.	–	–	–	–	Not filed
Swedbank AB	–	–	–	–	Not filed
Nykredit A/S	–	–	–	–	Not filed
Strategic Planning Group, LLC	–	–	–	–	Not filed
Employees Provident Fund Board	–	–	–	–	Not filed
Ci Investments Inc.	–	–	–	–	Not filed
Zevenbergen Capital Investments LLC	–	–	–	–	Not filed
Public Employees Retirement Association of Colorado	–	–	–	–	Not filed
Natixis Advisors, L.P.	–	–	–	–	Not filed
Hel Ved Capital Management Ltd	–	–	–	–	Not filed
Tredje AP-fonden	–	–	–	–	Not filed
Markel Group Inc.SuperinvestorMarkel Group	–	–	–	–	Not filed
ING Groep NV	–	–	–	–	Not filed
Kovitz Investment Group Partners, LLC	–	–	–	–	Not filed
Sumitomo Mitsui DS Asset Management Company, Ltd	–	–	–	–	Not filed
Nomura Asset Management Co Ltd	–	–	–	–	Not filed
State of Tennessee, Treasury Department	–	–	–	–	Not filed
O'Shaughnessy Asset Management, LLC	–	–	–	–	Not filed
Cowa, LLC	–	–	–	–	Not filed
Public Employees Retirement System of Ohio	–	–	–	–	Not filed
Pallas Capital Advisors LLC	–	–	–	–	Not filed
BWCP, LP	–	–	–	–	Not filed
Jones Financial Companies LLLP	–	–	–	–	Not filed
Investment Management Corp of Ontario	–	–	–	–	Not filed
Trexquant Investment LP	–	–	–	–	Not filed
Nisa Investment Advisors, LLC	–	–	–	–	Not filed
Robeco Schweiz AG	–	–	–	–	Not filed
Federation des caisses Desjardins du Quebec	–	–	–	–	Not filed
DnB Asset Management AS	–	–	–	–	Not filed
State of New Jersey Common Pension Fund D	–	–	–	–	Not filed
Parnassus Investments	–	–	–	–	Not filed
Andra AP-fonden	–	–	–	–	Not filed
Van Eck Associates Corp	–	–	–	–	Not filed
Moran Wealth Management, LLC	–	–	–	–	Not filed
Resona Asset Management Co.,Ltd.	–	–	–	–	Not filed
Toronto Dominion Bank	–	–	–	–	Not filed
Lansforsakringar Fondforvaltning AB (publ)	–	–	–	–	Not filed
Mn Services Vermogensbeheer B.V.	–	–	–	–	Not filed
Oddo BHF Asset Management SAS	–	–	–	–	Not filed
State of Michigan Retirement System	–	–	–	–	Not filed
Arizona State Retirement System	–	–	–	–	Not filed
Czech National Bank	–	–	–	–	Not filed
Crown Advisors Management, Inc.	–	–	–	–	Not filed
Xponance, Inc.	–	–	–	–	Not filed
Pinebridge Investments LLC	–	–	–	–	Not filed
Retirement Systems of Alabama	–	–	–	–	Not filed
CIBC Asset Management Inc	–	–	–	–	Not filed
JGP Wealth Management, LLC	–	–	–	–	Not filed
MetLife Investment Management	–	–	–	–	Not filed
IMC-Chicago, LLC	–	–	–	–	Not filed
CI Private Wealth, LLC	–	–	–	–	Not filed
Moore Capital Management, LP	–	–	–	–	Not filed
ASR Vermogensbeheer N.V.	–	–	–	–	Not filed
California First Leasing Corp	–	–	–	–	Not filed
DekaBank Deutsche Girozentrale	–	–	–	–	Not filed
Cambridge Investment Research Advisors, Inc.	–	–	–	–	Not filed
IFM Investors Pty Ltd	–	–	–	–	Not filed
USS Investment Management Ltd	–	–	–	–	Not filed
Keystone Investors Pte Ltd	–	–	–	–	Not filed
Schonfeld Strategic Advisors LLC	–	–	–	–	Not filed
Verition Fund Management LLC	–	–	–	–	Not filed
Eurizon Capital SGR S.p.A.	–	–	–	–	Not filed
Dorsey Wright & Associates	–	–	–	–	Not filed
Blue Grotto Capital, LLC	–	–	–	–	Not filed
Varma Mutual Pension Insurance Co	–	–	–	–	Not filed
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	–	–	–	–	Not filed
Baird Financial Group, Inc.	–	–	–	–	Not filed
Woodline Partners LP	–	–	–	–	Not filed
Whittier Trust Co	–	–	–	–	Not filed
Entropy Technologies, LP	–	–	–	–	Not filed
PensionDanmark Pensionsforsikringsaktieselskab	–	–	–	–	Not filed
VestGen Advisors, LLC	–	–	–	–	Not filed
Amalgamated Bank	–	–	–	–	Not filed
Walleye Capital LLC	–	–	–	–	Not filed
Neumeier Poma Investment Counsel LLC	–	–	–	–	Not filed
Janney Montgomery Scott LLC	–	–	–	–	Not filed
Erste Asset Management GmbH	–	–	–	–	Not filed
Pathstone Holdings, LLC	–	–	–	–	Not filed
Tudor Investment Corp Et Al	–	–	–	–	Not filed
Scalar Gauge Management, LLC	–	–	–	–	Not filed
Prudential PLC	–	–	–	–	Not filed
Hedeker Wealth, LLC	–	–	–	–	Not filed
Advisors Asset Management, Inc.	–	–	–	–	Not filed
Bank of Nova Scotia	–	–	–	–	Not filed
BW Gestao de Investimentos Ltda.	–	–	–	–	Not filed
Wealth High Governance Capital Ltda	–	–	–	–	Not filed
Spire Wealth Management	–	–	–	–	Not filed
Fideuram Asset Management (Ireland) dac	–	–	–	–	Not filed
Kestra Advisory Services, LLC	–	–	–	–	Not filed
Avanza Fonder AB	–	–	–	–	Not filed
Commonwealth Equity Services, LLC	–	–	–	–	Not filed
Merit Financial Group, LLC	–	–	–	–	Not filed
Two Sigma Investments, LP	–	–	–	–	Not filed
Kornitzer Capital Management Inc	–	–	–	–	Not filed
Ilmarinen Mutual Pension Insurance Co	–	–	–	–	Not filed
Penobscot Investment Management Company, Inc.	–	–	–	–	Not filed