Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership50,284 shares
Latest Disclosed Value $ 69,341,133
Bnp Paribas Arbitrage, Sa reports 12.09% decrease in ownership of FIX / Comfort Systems USA, Inc.

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 50,284 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $69,341,133 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 57,199 shares of Comfort Systems USA, Inc.. This represents a change in shares of -12.09% 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)
2026-05-12 2026-03-31 13F Comfort Systems USA Equity 199908104 50,284 -6,915 -12.09 69,341 29.89 0.0337
2026-02-10 2025-12-31 13F Comfort Systems USA Equity 199908104 57,199 39,888 230.42 53,383 273.73 0.0242
2025-11-13 2025-09-30 13F Comfort Systems USA Equity 199908104 17,311 -2,289 -11.68 14,285 35.92 0.0076
2025-08-14 2025-06-30 13F Comfort Systems USA Equity 199908104 19,600 -31,650 -61.76 10,510 -36.38 0.0060
2025-05-14 2025-03-31 13F Comfort Systems USA Equity 199908104 51,250 -3,206 -5.89 16,519 -28.46 0.0097
2025-02-14 2024-12-31 13F Comfort Systems USA Equity 199908104 54,456 28,041 106.16 23,093 123.95 0.0129
2024-11-13 2024-09-30 13F Comfort Systems USA Equity 199908104 26,415 -4,825 -15.44 10,311 8.54 0.0069
2024-08-13 2024-06-30 13F Comfort Systems USA Equity 199908104 31,240 -30,854 -49.69 9,501 -51.84 0.0077
2024-05-01 2024-03-31 13F Comfort Systems USA Equity 199908104 62,094 12,253 24.58 19,728 92.46 0.0173
2024-02-14 2023-12-31 13F/A-2 Comfort Systems USA Equity 199908104 49,841 7,067 16.52 10,251 40.62 0.0116
2024-02-07 2023-12-31 13F/A-1 Comfort Systems USA Equity 199908104 49,841 7,067 10,251 0.0014
2024-02-07 2023-12-31 13F Comfort Systems USA Equity 199908104 49,841 10,251
2023-11-14 2023-09-30 13F Comfort Systems USA Equity 199908104 42,774 25,685 150.30 7,289 159.76 0.0094
2023-08-09 2023-06-30 13F Comfort Systems USA Equity 199908104 17,089 -6,416 -27.30 2,806 -18.19 0.0035
2023-05-12 2023-03-31 13F COMFORT SYSTEMS USA EQUITY 199908104 23,505 6,120 35.20 3,431 71.50 0.0048
2023-02-14 2022-12-31 13F Comfort Systems USA Equity 199908104 17,385 3,609 26.20 2,001 49.25 0.0031
2022-11-16 2022-09-30 13F/A-1 Comfort Systems USA Equity 199908104 13,776 3,952 40.23 1,341 64.22 0.0021
2022-11-15 2022-09-30 13F Comfort Systems USA Equity 199908104 13,776 3,952 1,341 0.0003
2022-08-12 2022-06-30 13F Comfort Systems USA Equity 199908104 9,824 -340 -3.35 817 -9.73 0.0013
2022-05-18 2022-03-31 13F/A-1 Comfort Systems USA Equity 199908104 10,164 -7,967 -43.94 905 -49.58 0.0012
2022-02-09 2021-12-31 13F COMFORT SYSTEMS USA EQUITY 199908104 18,131 -26,464 -59.34 1,794 -43.62 0.0026
2021-11-16 2021-09-30 13F/A-1 COMFORT SYSTEMS USA EQUITY 199908104 44,595 26,791 150.48 3,181 126.82 0.0045
2021-11-12 2021-09-30 13F COMFORT SYSTEMS USA EQUITY 199908104 9,224 -8,580 475 0.0000
2021-08-10 2021-06-30 13F COMFORT SYSTEMS USA EQUITY 199908104 17,804 1,395 8.50 1,403 14.36 0.0019
2021-05-07 2021-03-31 13F COMFORT SYSTEMS USA EQUITY 199908104 16,409 5,835 55.18 1,227 120.50 0.0018
2021-02-10 2020-12-31 13F COMFORT SYSTEMS USA EQUITY 199908104 10,574 1,350 14.64 557 17.05 0.0010
2020-10-30 2020-09-30 13F COMFORT SYSTEMS USA EQUITY 199908104 9,224 6,213 206.34 475 289.34 0.0007
2020-08-06 2020-06-30 13F COMFORT SYSTEMS USA EQUITY 199908104 3,011 -29,575 -90.76 123 -89.76 0.0002
2020-05-13 2020-03-31 13F COMFORT SYSTEMS USA EQUITY 199908104 32,586 22,158 212.49 1,191 129.48 0.0024
2020-02-12 2019-12-31 13F COMFORT SYSTEMS USA EQUITY 199908104 10,428 3,536 51.31 520 70.72 0.0009
2019-11-07 2019-09-30 13F COMFORT SYSTEMS USA EQUITY 199908104 6,892 934 15.68 305 0.33 0.0005
2019-07-30 2019-06-30 13F COMFORT SYSTEMS USA EQUITY 199908104 5,958 -2,660 -30.87 304 -32.82 0.0006
2019-04-25 2019-03-31 13F COMFORT SYSTEMS USA EQUITY 199908104 8,618 6,890 398.73 451 501.33 0.0010
2019-02-12 2018-12-31 13F COMFORT SYSTEMS USA EQUITY 199908104 1,728 -426 -19.78 75 -38.02 0.0002
2018-11-07 2018-09-30 13F COMFORT SYSTEMS USA EQUITY 199908104 2,154 -76 -3.41 121 18.63 0.0002
2018-07-25 2018-06-30 13F COMFORT SYSTEMS USA EQUITY 199908104 2,230 -9,927 -81.66 102 -79.64 0.0002
2018-05-11 2018-03-31 13F COMFORT SYSTEMS USA EQUITY 199908104 12,157 -3,189 -20.78 501 -25.11 0.0009
2018-03-05 2017-12-31 13F/A-1 COMFORT SYSTEMS USA EQUITY 199908104 15,346 -4,113 -21.14 670 -3.60 0.0012
2018-02-01 2017-12-31 13F COMFORT SYSTEMS USA EQUITY 199908104 15,346 -4,113 670
2017-11-03 2017-09-30 13F COMFORT SYS USA STOCK 199908104 19,459 6,586 51.16 695 45.49 0.0017
2017-08-03 2017-06-30 13F COMFORT SYS USA STOCK 199908104 12,873 4,499 53.73 478 55.88 0.0014
2017-05-03 2017-03-31 13F COMFORT SYS USA STOCK 199908104 8,374 841 11.16 307 22.40 0.0008
2017-02-14 2016-12-31 13F COMFORT SYS USA STOCK 199908104 7,533 1,477 24.39 251 41.24 0.0012
2016-10-05 2016-09-30 13F * COMFORT SYS USA INC COM STOCK 199908104 6,056 -5,945 -49.54 178 -54.62 0.0007
2016-07-06 2016-06-30 13F * COMFORT SYS USA INC COM STOCK 199908104 12,001 6,269 109.37 391 114.29 0.0018
2016-04-22 2016-03-31 13F * COMFORT SYS USA INC COM STOCK 199908104 5,732 1,309 29.60 182 45.60 0.0008
2016-04-19 2015-12-31 13F/A-1 * COMFORT SYS USA INC COM STOCK 199908104 4,423 -3,621 -45.01 126 -42.92 0.0006
2016-02-10 2015-12-31 13F * COMFORT SYS USA INC COM STOCK 199908104 4,423 126
2015-11-13 2015-09-30 13F * COMFORT SYS USA INC COM STOCK 199908104 8,044 4,941 159.23 219 208.45 0.0005
2015-08-14 2015-06-30 13F COMFORT SYS USA INC COM STOCK 199908104 3,103 2,216 249.83 71 294.44 0.0002
2015-05-15 2015-03-31 13F * COMFORT SYS USA INC COM STOCK 199908104 887 -3,830 -81.20 19 -77.50 0.0001
2015-03-10 2014-12-31 13F/A-1 * COMFORT SYS USA INC COM STOCK 199908104 4,717 -17,913 -79.16 81 -73.86 0.0003
2015-02-11 2014-12-31 13F * COMFORT SYS USA INC COM STOCK 199908104 4,717 81
2014-11-12 2014-09-30 13F * COMFORT SYS USA INC COM STOCK 199908104 22,630 -3,676 -13.97 307 -26.27 0.0003
2014-08-14 2014-06-30 13F/A-1 * COMFORT SYS USA INC COM STOCK 199908104 26,306 4,944 23.14 416 29.69 0.0004
2014-08-14 2014-06-30 13F COMFORT SYS USA INC COM STOCK 199908104 26,306 416
2014-05-13 2014-03-31 13F COMFORT SYS USA STOCK 199908104 21,362 20,881 4,341.16 320 3,455.56 0.0002
2014-04-02 2013-12-31 13F/A-1 COMFORT SYS USA STOCK 199908104 481 -9,656 -95.26 9 -94.71 0.0000
2013-11-13 2013-09-30 13F COMFORT SYS USA STOCK 199908104 10,137 -2,232 -18.05 170 -7.61 0.0001
2013-08-13 2013-06-30 13F COMFORT SYS USA STOCK 199908104 12,369 12,369 185 0.0001
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.