COMFORT SYSTEMS USA INC (FIX) Stock Institutional Trading Activity


COMFORT SYSTEMS USA INC (FIX) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Third Point, Renaissance Technologies LLC, Causeway Capital Management, Sequoia Financial Advisors, and Polen Capital Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Causeway Capital ManagementBuy243243$226,789
Q4 2025Renaissance Technologies LLCBuy3,58053,980$50,378,994
Q4 2025Third PointSell-95,000105,000$97,995,450
Q3 2025Sequoia Financial AdvisorsBuy4332,124$1,752,731
Q3 2025Renaissance Technologies LLCSell-79,90050,400$41,589,072
Q3 2025Third PointBuy15,000200,000$165,036,000
Q2 2025Sequoia Financial AdvisorsBuy2601,691$906,755
Q2 2025Renaissance Technologies LLCSell-900130,300$69,868,163
Q2 2025Third PointBuy185,000185,000$99,198,850
Q1 2025Polen Capital ManagementBuy1,1661,166$375,837
Q1 2025Sequoia Financial AdvisorsBuy181,431$461,262
Q1 2025Renaissance Technologies LLCBuy79,900131,200$42,289,696
Q4 2024Sequoia Financial AdvisorsSell-911,413$599,206
Q4 2024Renaissance Technologies LLCSell-42,70051,300$21,754,278
Q3 2024Sequoia Financial AdvisorsBuy771,504$587,087
Q3 2024Renaissance Technologies LLCBuy60,20094,000$36,692,900
Q2 2024Sequoia Financial AdvisorsSell-111,427$433,980
Q2 2024Renaissance Technologies LLCBuy11,80033,800$10,279,256
Q1 2024Renaissance Technologies LLCSell-14,60022,000$6,990
Q1 2024Sequoia Financial AdvisorsSell-1021,438$456,867
Q4 2023Third Avenue ManagementSell-6,27019,434$3,996,991
Q4 2023Renaissance Technologies LLCBuy12,60036,600$7,528
Q4 2023Sequoia Financial AdvisorsSell-1921,540$316,732
Q3 2023Sequoia Financial AdvisorsBuy491,732$295,151
Q2 2023Third Avenue ManagementSell-3,19825,704$4,220,597
Q2 2023Renaissance Technologies LLCSell-77,20024,000$3,941
Q2 2023Sequoia Financial AdvisorsBuy2061,683$276,349
Q1 2023Renaissance Technologies LLCBuy68,900101,200$14,771
Q1 2023Sequoia Financial AdvisorsBuy1,4771,477$215,583
Q4 2022Third Avenue ManagementSell-13,49828,902$3,326,042

Frequently asked questions about FIX activity

  • Which institutional owners are buying FIX?

    Institutional owners buying FIX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in FIX activity?

    "Buy" means an investor increased their reported position in FIX compared to the prior reporting period. This reflects growing exposure to COMFORT SYSTEMS USA INC (FIX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in FIX increasing?

    Institutional interest in FIX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.