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
Q3 2016Third Avenue ManagementBuy162,058162,058$4,750
Q3 2016Renaissance Technologies LLCBuy21,600715,500$20,971
Q2 2016Renaissance Technologies LLCSell-59,400693,900$22,600
Q1 2016Renaissance Technologies LLCSell-13,100753,300$23,932
Q4 2015Renaissance Technologies LLCBuy375,492766,400$21,781
Q3 2015Renaissance Technologies LLCBuy267,408390,908$10,656
Q2 2015Renaissance Technologies LLCBuy3,787123,500$2,834
Q1 2015Renaissance Technologies LLCBuy55,813119,713$2,519
Q3 2014Renaissance Technologies LLCBuy8,10063,900$866
Q2 2014Renaissance Technologies LLCSell-261,29755,800$882
Q1 2014Renaissance Technologies LLCBuy64,697317,097$4,833
Q4 2013Renaissance Technologies LLCBuy219,000252,400$4,894
Q3 2013Renaissance Technologies LLCBuy33,40033,400$561

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.