Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership7,049 shares
Latest Disclosed Value $ 9,720,501
Engineers Gate Manager LP reports 132.95% increase in ownership of FIX / Comfort Systems USA, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 7,049 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $9,720,501 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,026 shares of Comfort Systems USA, Inc.. This represents a change in shares of 132.95% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F COMFORT SYS USA COM 199908104 7,049 4,023 132.95 9,721 244.19 0.1215
2026-02-17 2025-12-31 13F COMFORT SYS USA COM 199908104 3,026 -352 -10.42 2,824 1.33 0.0335
2025-11-14 2025-09-30 13F COMFORT SYS USA COM 199908104 3,378 -4,546 -57.37 2,787 -34.39 0.0319
2025-08-14 2025-06-30 13F COMFORT SYS USA COM 199908104 7,924 -17,949 -69.37 4,249 -49.06 0.0529
2025-05-15 2025-03-31 13F COMFORT SYS USA COM 199908104 25,873 -256 -0.98 8,340 -24.74 0.1406
2025-02-14 2024-12-31 13F COMFORT SYS USA COM 199908104 26,129 8,833 51.07 11,080 64.12 0.1928
2024-11-14 2024-09-30 13F COMFORT SYS USA COM 199908104 17,296 -9,228 -34.79 6,751 -16.30 0.1318
2024-08-14 2024-06-30 13F COMFORT SYS USA COM 199908104 26,524 17,271 186.65 8,066 174.45 0.1819
2024-05-15 2024-03-31 13F COMFORT SYS USA COM 199908104 9,253 -8,670 -48.37 2,940 -20.27 0.0774
2024-02-14 2023-12-31 13F COMFORT SYS USA COM 199908104 17,923 14,537 429.33 3,686 538.82 0.1052
2023-11-14 2023-09-30 13F COMFORT SYS USA COM 199908104 3,386 1,919 130.81 577 140.42 0.0213
2023-08-14 2023-06-30 13F COMFORT SYS USA COM 199908104 1,467 -6,993 -82.66 241 -80.55 0.0091
2023-05-15 2023-03-31 13F COMFORT SYS USA COM 199908104 8,460 4,387 107.71 1,235 163.68 0.0516
2023-02-14 2022-12-31 13F COMFORT SYS USA COM 199908104 4,073 1,853 83.47 469 116.67 0.0282
2022-11-14 2022-09-30 13F COMFORT SYS USA COM 199908104 2,220 2,220 216 0.0134
2021-02-16 2020-12-31 13F COMFORT SYS USA COM 199908104 0 -8,264 -100.00 0 -100.00
2020-11-16 2020-09-30 13F COMFORT SYS USA COM 199908104 8,264 8,264 426 0.0200
2020-08-17 2020-06-30 13F COMFORT SYS USA COM 199908104 0 -16,726 -100.00 0 -100.00
2020-05-15 2020-03-31 13F COMFORT SYS USA COM 199908104 16,726 8,346 99.59 611 46.17 0.0440
2020-02-14 2019-12-31 13F COMFORT SYS USA COM 199908104 8,380 -1,532 -15.46 418 -4.57 0.0184
2019-11-14 2019-09-30 13F COMFORT SYS USA COM 199908104 9,912 9,912 438 0.0222
2019-08-14 2019-06-30 13F COMFORT SYS USA COM 199908104 0 -28,531 -100.00 0 -100.00
2019-05-15 2019-03-31 13F COMFORT SYS USA COM 199908104 28,531 2,170 8.23 1,495 29.89 0.0905
2019-02-14 2018-12-31 13F COMFORT SYS USA COM 199908104 26,361 -9,134 -25.73 1,151 -42.51 0.0921
2018-11-01 2018-09-30 13F COMFORT SYS USA COM 199908104 35,495 15,175 74.68 2,002 115.04 0.1538
2018-08-03 2018-06-30 13F COMFORT SYS USA COM 199908104 20,320 20,320 931 0.0726
2016-08-11 2016-06-30 13F COMFORT SYS USA COM 199908104 0 -32,954 -100.00 0 -100.00
2016-05-09 2016-03-31 13F COMFORT SYS USA COM 199908104 32,954 -22,288 -40.35 1,047 -33.31 0.0816
2016-02-05 2015-12-31 13F COMFORT SYS USA COM 199908104 55,242 6,314 12.90 1,570 17.69 0.1060
2015-11-16 2015-09-30 13F COMFORT SYS USA COM 199908104 48,928 30,092 159.76 1,334 208.80 0.1136
2015-08-14 2015-06-30 13F COMFORT SYS USA COM 199908104 18,836 4,303 29.61 432 41.18 0.0423
2015-05-15 2015-03-31 13F COMFORT SYS USA COM 199908104 14,533 14,533 306 0.0407
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.