How many institutional investors hold FIX?

5 tracked institutional investors disclosed a position in FIX (COMFORT SYS USA INC) in their most recent 13F filing.

Who is the largest institutional holder of FIX?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in FIX, valued at $415M.

Where does this FIX ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

FIX — COMFORT SYS USA INC

Name: COMFORT SYS USA INC (FIX) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About COMFORT SYS USA INC (FIX)

COMFORT SYS USA INC (FIX) appears in the most recent 13F filings of 5 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $415M. Across recent filings, tracked investors recorded 5 new positions, 2 increased, 1 reduced, and 0 exited. All data sourced from SEC 13F filings.

Tracked investors reporting FIX

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	300.9K	$414.9M	0.07%	Mar 31, 2026
Steve Cohen	Point72 Asset Management	261.5K	$360.7M	0.46%	Mar 31, 2026
Izzy Englander	Millennium Management	110.7K	$152.7M	0.06%	Mar 31, 2026
Ray Dalio	Bridgewater Associates	86.5K	$119.2M	0.53%	Mar 31, 2026
Daniel Loeb	Third Point LLC	105K	$98M	1.35%	Dec 31, 2025

Ken GriffinMar 31, 2026
Citadel Advisors
Shares
300.9K
Value
$414.9M
% Portfolio
0.07%
Steve CohenMar 31, 2026
Point72 Asset Management
Shares
261.5K
Value
$360.7M
% Portfolio
0.46%
Izzy EnglanderMar 31, 2026
Millennium Management
Shares
110.7K
Value
$152.7M
% Portfolio
0.06%
Ray DalioMar 31, 2026
Bridgewater Associates
Shares
86.5K
Value
$119.2M
% Portfolio
0.53%
Daniel LoebDec 31, 2025
Third Point LLC
Shares
105K
Value
$98M
% Portfolio
1.35%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Izzy Englander	New	—	$59.1M	Feb 17, 2026
Steve Cohen	New	—	$177.1M	Feb 17, 2026
Daniel Loeb	New	—	$98M	Feb 17, 2026
Steve Cohen	New	—	$360.7M	May 15, 2026
Ray Dalio	Increased	26.78%	$119.2M	May 15, 2026
Ken Griffin	Reduced	-44.76%	$89.4K	Feb 17, 2026
Ray Dalio	Increased	30.94%	$63.6K	Feb 13, 2026
Ray Dalio	New	—	$43K	Nov 13, 2025

Izzy Englander
New
$59.1MFeb 17, 2026
Steve Cohen
New
$177.1MFeb 17, 2026
Daniel Loeb
New
$98MFeb 17, 2026
Steve Cohen
New
$360.7MMay 15, 2026
Ray Dalio
Increased
$119.2M(26.78%)May 15, 2026
Ken Griffin
Reduced
$89.4K(-44.76%)Feb 17, 2026
Ray Dalio
Increased
$63.6K(30.94%)Feb 13, 2026
Ray Dalio
New
$43KNov 13, 2025

Frequently asked questions

How many institutional investors hold FIX?: 5 tracked institutional investors disclosed a position in FIX (COMFORT SYS USA INC) in their most recent 13F filing.
Who is the largest institutional holder of FIX?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in FIX, valued at $415M.
Did institutional ownership of FIX increase or decrease?: Across recent 13F filings, tracked investors recorded 5 new positions, 2 increased, 1 reduced, and 0 fully exited FIX.
Where does this FIX ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.