Renaissance Technologies's FIX Position Overview
Renaissance Technologies (via Renaissance Technologies LLC) currently holds 53,980 shares of Comfort Systems USA, Inc. (FIX) worth $50.38 M, representing 0.08% of the portfolio. First purchased in 2013-Q3, this long-term strategic position has been held for 48 quarters.
Based on 13F filings since 2013, Renaissance Technologies has maintained a long-term strategic position in FIX, representing a significant commitment to this investment thesis. Largest addition occurred in Q4 2015, adding 375,492 shares. Largest reduction occurred in Q2 2019, reducing 283,400 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies's Comfort Systems USA (FIX) Holding Value Over Time
Track share changes against reported price movement
Quarterly Comfort Systems USA (FIX) Trades by Renaissance Technologies
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +3,580 | Add 7.10% | 53,980 | $933.29 |
| Q3 2025 | -79,900 | Reduce 61.32% | 50,400 | $825.18 |
| Q2 2025 | -900 | Reduce 0.69% | 130,300 | $536.21 |
| Q1 2025 | +79,900 | Add 155.75% | 131,200 | $322.33 |
| Q4 2024 | -42,700 | Reduce 45.43% | 51,300 | $424.06 |
| Q3 2024 | +60,200 | Add 178.11% | 94,000 | $390.35 |
| Q2 2024 | +11,800 | Add 53.64% | 33,800 | $304.12 |
| Q1 2024 | -14,600 | Reduce 39.89% | 22,000 | $317.73 |
| Q4 2023 | +36,600 | New Buy | 36,600 | $205.68 |
| Q3 2023 | -24,000 | Sold Out | 0 | $0.00 |
| Q2 2023 | -77,200 | Reduce 76.28% | 24,000 | $0.16 |
| Q1 2023 | +68,900 | Add 213.31% | 101,200 | $0.15 |
| Q4 2022 | +32,300 | New Buy | 32,300 | $0.12 |
| Q2 2022 | -39,800 | Sold Out | 0 | $0.00 |
| Q1 2022 | +39,800 | New Buy | 39,800 | $89.02 |
| Q4 2021 | -50,600 | Sold Out | 0 | $0.00 |
| Q3 2021 | -3,774 | Reduce 6.94% | 50,600 | $71.32 |
| Q2 2021 | -42,326 | Reduce 43.77% | 54,374 | $78.79 |
| Q1 2021 | +8,800 | Add 10.01% | 96,700 | $74.77 |
| Q4 2020 | -7,300 | Reduce 7.67% | 87,900 | $52.66 |
| Q3 2020 | -3,400 | Reduce 3.45% | 95,200 | $51.51 |
| Q2 2020 | +77,000 | Add 356.48% | 98,600 | $40.75 |
| Q1 2020 | +21,600 | New Buy | 21,600 | $36.53 |
| Q3 2019 | -127,480 | Sold Out | 0 | $0.00 |
| Q2 2019 | -283,400 | Reduce 68.97% | 127,480 | $50.99 |
| Q1 2019 | -206,100 | Reduce 33.40% | 410,880 | $52.39 |
| Q4 2018 | -70,020 | Reduce 10.19% | 616,980 | $43.68 |
| Q3 2018 | -100 | Reduce 0.01% | 687,000 | $56.40 |
| Q2 2018 | +19,400 | Add 2.91% | 687,100 | $45.80 |
| Q1 2018 | +100 | Add 0.01% | 667,700 | $41.25 |
| Q4 2017 | -85,500 | Reduce 11.35% | 667,600 | $43.65 |
| Q3 2017 | -114,992 | Reduce 13.25% | 753,100 | $35.70 |
| Q2 2017 | +90,592 | Add 11.65% | 868,092 | $37.10 |
| Q1 2017 | +30,800 | Add 4.12% | 777,500 | $36.65 |
| Q4 2016 | +31,200 | Add 4.36% | 746,700 | $33.30 |
| Q3 2016 | +21,600 | Add 3.11% | 715,500 | $29.31 |
| Q2 2016 | -59,400 | Reduce 7.89% | 693,900 | $32.57 |
| Q1 2016 | -13,100 | Reduce 1.71% | 753,300 | $31.77 |
| Q4 2015 | +375,492 | Add 96.06% | 766,400 | $28.42 |
| Q3 2015 | +267,408 | Add 216.52% | 390,908 | $27.26 |
| Q2 2015 | +3,787 | Add 3.16% | 123,500 | $22.95 |
| Q1 2015 | +119,713 | New Buy | 119,713 | $21.04 |
| Q4 2014 | -63,900 | Sold Out | 0 | $0.00 |
| Q3 2014 | +8,100 | Add 14.52% | 63,900 | $13.55 |
| Q2 2014 | -261,297 | Reduce 82.40% | 55,800 | $15.81 |
| Q1 2014 | +64,697 | Add 25.63% | 317,097 | $15.24 |
| Q4 2013 | +219,000 | Add 655.69% | 252,400 | $19.39 |
| Q3 2013 | +33,400 | New Buy | 33,400 | $16.80 |
Renaissance Technologies's Comfort Systems USA Investment FAQs
Renaissance Technologies first purchased Comfort Systems USA, Inc. (FIX) in Q3 2013, acquiring 33,400 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Renaissance Technologies has held Comfort Systems USA, Inc. (FIX) for 48 quarters since Q3 2013.
Renaissance Technologies's largest addition to Comfort Systems USA, Inc. (FIX) was in Q4 2015, adding 766,400 shares worth $21.78 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies's firm, Renaissance Technologies LLC, owns 53,980 shares of Comfort Systems USA, Inc. (FIX), valued at approximately $50.38 M.
As of the Q4 2025 filing, Comfort Systems USA, Inc. (FIX) represents approximately 0.08% of Renaissance Technologies's publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies's peak holding in Comfort Systems USA, Inc. (FIX) was 868,092 shares, as reported at the end of Q2 2017.