Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionQuadrant Capital Group Llc
Latest Disclosed Ownership3,708 shares
Latest Disclosed Value $ 5,113,295
Quadrant Capital Group Llc reports 0.14% increase in ownership of FIX / Comfort Systems USA, Inc.

On May 13, 2026 - Quadrant Capital Group Llc filed a 13F-HR/A form disclosing ownership of 3,708 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $5,113,295 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 3,703 shares of Comfort Systems USA, Inc.. This represents a change in shares of 0.14% 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)
2026-05-13 2026-03-31 13F/A-1 COMFORT SYS USA COM 199908104 3,708 5 0.14 5,113 47.99 0.1529
2026-05-11 2026-03-31 13F COMFORT SYS USA COM 199908104 3,708 5 49 0.0369
2026-02-12 2025-12-31 13F COMFORT SYS USA COM 199908104 3,703 -47 -1.25 3,456 11.67 0.1044
2025-11-13 2025-09-30 13F COMFORT SYS USA COM 199908104 3,750 -9 -0.24 3,094 53.55 0.1006
2025-08-13 2025-06-30 13F COMFORT SYS USA COM 199908104 3,759 125 3.44 2,016 72.08 0.0725
2025-05-13 2025-03-31 13F COMFORT SYS USA COM 199908104 3,634 2,164 147.21 1,171 87.96 0.0435
2025-02-13 2024-12-31 13F COMFORT SYS USA COM 199908104 1,470 -34 -2.26 623 6.13 0.0429
2024-11-12 2024-09-30 13F COMFORT SYS USA COM 199908104 1,504 40 2.73 587 31.91 0.0408
2024-08-12 2024-06-30 13F COMFORT SYS USA COM 199908104 1,464 102 7.49 445 3.01 0.0331
2024-05-15 2024-03-31 13F COMFORT SYS USA COM 199908104 1,362 -9 -0.66 433 53.74 0.0342
2024-02-08 2023-12-31 13F COMFORT SYS USA COM 199908104 1,371 307 28.85 282 55.25 0.0242
2023-11-14 2023-09-30 13F COMFORT SYS USA COM 199908104 1,064 221 26.22 181 31.16 0.0182
2023-08-10 2023-06-30 13F COMFORT SYS USA COM 199908104 843 232 37.97 138 55.06 0.0137
2023-05-11 2023-03-31 13F COMFORT SYS USA COM 199908104 611 17 2.86 89 30.88 0.0093
2023-02-13 2022-12-31 13F COMFORT SYS USA COM 199908104 594 159 36.55 68 61.90 0.0077
2022-11-10 2022-09-30 13F COMFORT SYS USA COM 199908104 435 285 190.00 42 250.00 0.0056
2022-08-09 2022-06-30 13F COMFORT SYS USA COM 199908104 150 96 177.78 12 140.00 0.0016
2022-05-06 2022-03-31 13F COMFORT SYS USA COM 199908104 54 0 0.00 5 0.00 0.0006
2022-02-01 2021-12-31 13F COMFORT SYS USA COM 199908104 54 0 0.00 5 25.00 0.0006
2021-11-12 2021-09-30 13F COMFORT SYS USA COM 199908104 54 0 0.00 4 0.00 0.0006
2021-08-09 2021-06-30 13F COMFORT SYS USA COM 199908104 54 0 0.00 4 0.00 0.0006
2021-05-12 2021-03-31 13F COMFORT SYS USA COM 199908104 54 0 0.00 4 33.33 0.0006
2021-02-16 2020-12-31 13F COMFORT SYS USA COM 199908104 54 3 5.88 3 0.00 0.0006
2020-11-13 2020-09-30 13F COMFORT SYS USA COM 199908104 51 0 0.00 3 50.00 0.0007
2020-08-13 2020-06-30 13F COMFORT SYS USA COM 199908104 51 -104 -67.10 2 -66.67 0.0004
2020-05-15 2020-03-31 13F Comfort Systems USA Com 199908104 155 -2 -1.27 6 -14.29 0.0010
2020-03-19 2019-12-31 13F/A-1 Comfort Systems USA Com 199908104 157 106 207.84 7 250.00 0.0008
2020-02-03 2019-12-31 13F Comfort Systems USA Com 199908104 157 106 7 23.6539
2019-10-24 2019-09-30 13F Comfort Systems USA COM 199908104 51 0 0.00 2 0.00 0.0003
2019-07-24 2019-06-30 13F Comfort Systems USA COM 199908104 51 -1,048 -95.36 2 -96.43 0.0003
2019-04-29 2019-03-31 13F Comfort Systems USA COM 199908104 1,099 1,048 2,054.90 56 2,700.00 0.0098
2019-01-17 2018-12-31 13F Comfort Systems USA COM 199908104 51 0 0.00 2 0.00 0.0005
2018-10-29 2018-09-30 13F Comfort Systems USA COM 199908104 51 0 0.00 2 0.00 0.0006
2018-08-08 2018-06-30 13F Comfort Systems USA COM 199908104 51 0 0.00 2 0.00 0.0007
2018-05-10 2018-03-31 13F Comfort Systems USA COM 199908104 51 0 0.00 2 0.00 0.0007
2018-01-31 2017-12-31 13F Comfort Systems USA COM 199908104 51 0 0.00 2 100.00 0.0008
2017-10-13 2017-09-30 13F Comfort Systems USA COM 199908104 51 0 0.00 1 0.0004
2017-08-14 2017-06-30 13F Comfort Systems USA COM 199908104 51 0 0.00 0 -100.00
2017-04-10 2017-03-31 13F Comfort Systems USA COM 199908104 51 0 0.00 1 0.00 0.0004
2017-01-11 2016-12-31 13F Comfort Systems USA COM 199908104 51 51 0.00 1 0.0005
2016-04-27 2016-03-31 13F Comfort Systems USA COM 199908104 0 -208 -100.00 0 -100.00
2016-01-28 2015-12-31 13F Comfort Systems USA COM 199908104 208 208 5 0.0035
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.