COMFORT SYSTEMS USA INC (FIX) Institutional Ownership Changes & 13F Activity

COMFORT SYSTEMS USA INC (FIX) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC, Sequoia Financial Advisors, Causeway Capital Management, Third Point, and Polen Capital Management.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
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
Q4 2022Renaissance Technologies LLCSell-7,50032,300$3,717
Q1 2022Renaissance Technologies LLCSell-10,80039,800$3,543
Q1 2022Third Avenue ManagementSell-9,99042,400$3,775
Q4 2021First Eagle U.S. ValueSell-1,5005,366$531
Q3 2021First Eagle U.S. ValueBuy6,7006,866$490
Q3 2021Renaissance Technologies LLCSell-3,77450,600$3,609
Q2 2021Renaissance Technologies LLCSell-42,32654,374$4,284
Q2 2021First Eagle U.S. ValueBuy166166$13
Q1 2021Renaissance Technologies LLCBuy8,80096,700$7,230
Q4 2020Renaissance Technologies LLCSell-7,30087,900$4,629
Q3 2020Third Avenue ManagementSell-91,53552,390$2,699
Q3 2020Renaissance Technologies LLCSell-3,40095,200$4,904
Q2 2020Renaissance Technologies LLCBuy77,00098,600$4,018
Q2 2020Third Avenue ManagementBuy9,296143,925$5,865
Q1 2020Renaissance Technologies LLCSell-105,88021,600$789
Q3 2019Third Avenue ManagementBuy21,499134,629$5,955
Q2 2019Renaissance Technologies LLCSell-283,400127,480$6,500
Q1 2019Renaissance Technologies LLCSell-206,100410,880$21,526
Q4 2018Renaissance Technologies LLCSell-70,020616,980$26,950
Q3 2018Third Avenue ManagementSell-21,567113,130$6,381
Q3 2018Renaissance Technologies LLCBuy19,300687,000$38,747
Q1 2018Renaissance Technologies LLCBuy100667,700$27,543
Q4 2017Renaissance Technologies LLCSell-85,500667,600$29,141
Q4 2017Third Avenue ManagementSell-34,778134,697$5,880
Q3 2017Renaissance Technologies LLCSell-114,992753,100$26,886
Q3 2017Third Avenue ManagementBuy8,100169,475$6,051

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.

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