Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionComerica Bank
Latest Disclosed Ownership4,655 shares
Latest Disclosed Value $ 4,344,791
Comerica Bank reports 97.06% decrease in ownership of FIX / Comfort Systems USA, Inc.

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 4,655 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $4,344,791 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 158,406 shares of Comfort Systems USA, Inc.. This represents a change in shares of -97.06% 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)
2026-01-29 2025-12-31 13F COMFORT SYS USA COM 199908104 4,655 -153,751 -97.06 4,345 -96.68 0.0173
2025-11-14 2025-09-30 13F COMFORT SYS USA COM 199908104 158,406 7,127 4.71 130,713 61.14 0.4917
2025-08-14 2025-06-30 13F COMFORT SYS USA COM 199908104 151,279 5,085 3.48 81,118 72.14 0.3148
2025-05-14 2025-03-31 13F COMFORT SYS USA COM 199908104 146,194 4,712 3.33 47,123 -21.46 0.1979
2025-02-14 2024-12-31 13F/A-1 COMFORT SYS USA COM 199908104 141,482 4,108 2.99 59,997 11.88 0.2419
2025-02-14 2024-12-31 13F COMFORT SYS USA COM 199908104 141,482 4,108 59,997 0.2010
2024-11-14 2024-09-30 13F COMFORT SYS USA COM 199908104 137,374 11,354 9.01 53,624 39.92 0.2121
2024-08-15 2024-06-30 13F COMFORT SYSTEM USA COMMON 199908104 126,020 22,290 21.49 38,325 16.29 0.1595
2024-05-16 2024-03-31 13F COMFORT SYSTEM USA COMMON 199908104 103,730 26,616 34.52 32,956 107.79 0.1420
2024-02-14 2023-12-31 13F COMFORT SYSTEM USA COMMON 199908104 77,114 55,737 260.73 15,860 335.48 0.0730
2023-11-21 2023-09-30 13F COMFORT SYS USA COMMON 199908104 21,377 -147,684 -87.36 3,643 0.0190
2023-08-22 2023-06-30 13F COMFORT SYSTEM USA EQU 199908104 169,061 135,350 401.50 0 -100.00 0.0003
2023-01-26 2022-12-31 13F COMFORT SYSTEM USA COM 199908104 33,711 -19,492 -36.64 4 -99.93 0.0314
2022-10-28 2022-09-30 13F COMFORT SYSTEM USA COM 199908104 53,203 -5,833 -9.88 5,763 9.88 0.0486
2022-08-02 2022-06-30 13F COMFORT SYSTEM USA COM 199908104 59,036 -983 -1.64 5,245 -4.67 0.0431
2022-04-27 2022-03-31 13F COMFORT SYSTEM USA COM 199908104 60,019 -2,326 -3.73 5,502 0.00 0.0399
2022-02-18 2021-12-31 13F COMFORT SYSTEM USA COM 199908104 62,345 -1,503 -2.35 5,502 2.40 0.0405
2021-11-22 2021-09-30 13F COMFORT SYSTEM USA COM 199908104 63,848 28,316 79.69 5,373 106.42 0.0324
2021-08-26 2021-06-30 13F COMFORT SYSTEM USA COM 199908104 35,532 -1,352 -3.67 2,603 -12.47 0.0155
2021-04-28 2021-03-31 13F COMFORT SYSTEM USA COM 199908104 36,884 -1,715 -4.44 2,974 31.65 0.0177
2021-01-28 2020-12-31 13F COMFORT SYSTEM USA COM 199908104 38,599 136 0.35 2,259 6.56 0.0143
2020-10-30 2020-09-30 13F COMFORT SYSTEM USA COM 199908104 38,463 -1,062 -2.69 2,120 28.02 0.0154
2020-07-31 2020-06-30 13F COMFORT SYSTEM USA COM 199908104 39,525 1,167 3.04 1,656 38.93 0.0128
2020-05-01 2020-03-31 13F COMFORT SYSTEM USA COM 199908104 38,358 2,227 6.16 1,192 -31.14 0.0109
2020-02-07 2019-12-31 13F COMFORT SYSTEM USA COM 199908104 36,131 -16 -0.04 1,731 1.70 0.0131
2019-10-31 2019-09-30 13F COMFORT SYSTEM USA COM 199908104 36,147 -1,050 -2.82 1,702 -13.38 0.0135
2019-08-02 2019-06-30 13F COMFORT SYSTEM USA COM 199908104 37,197 -1,576 -4.06 1,965 -6.21 0.0157
2019-05-02 2019-03-31 13F COMFORT SYSTEM USA COM 199908104 38,773 271 0.70 2,095 14.73 0.0170
2019-02-06 2018-12-31 13F COMFORT SYSTEM USA COM 199908104 38,502 -717 -1.83 1,826 -8.79 0.0155
2018-11-01 2018-09-30 13F COMFORT SYSTEM USA COM 199908104 39,219 -1,718 -4.20 2,002 2.88 0.0161
2018-08-01 2018-06-30 13F COMFORT SYSTEM USA COM 199908104 40,937 1,423 3.60 1,946 16.81 0.0136
2018-05-01 2018-03-31 13F COMFORT SYSTEM USA COM 199908104 39,514 858 2.22 1,666 -0.48 0.0119
2018-02-02 2017-12-31 13F COMFORT SYSTEM USA COM 199908104 38,656 -1,220 -3.06 1,674 -1.59 0.0112
2017-11-06 2017-09-30 13F COMFORT SYSTEM USA COM 199908104 39,876 792 2.03 1,701 20.38 0.0123
2017-08-03 2017-06-30 13F COMFORT SYSTEM USA COM 199908104 39,084 -2,228 -5.39 1,413 -6.67 0.0106
2017-05-03 2017-03-31 13F COMFORT SYSTEM USA COM 199908104 41,312 2,031 5.17 1,514 14.01 0.0115
2017-02-08 2016-12-31 13F COMFORT SYSTEM USA COM 199908104 39,281 2,128 5.73 1,328 24.00 0.0105
2016-08-11 2016-06-30 13F COMFORT SYSTEM USA COM 199908104 37,153 -833 -2.19 1,071 -14.04 0.0093
2016-05-11 2016-03-31 13F COMFORT SYSTEM USA COM 199908104 37,986 82 0.22 1,246 16.45 0.0111
2016-02-05 2015-12-31 13F COMFORT SYSTEM USA COM 199908104 37,904 -214 -0.56 1,070 2.98 0.0105
2015-11-12 2015-09-30 13F COMFORT SYSTEM USA COM 199908104 38,118 -37,520 -49.60 1,039 -40.15 0.0098
2015-08-13 2015-06-30 13F COMFORT SYSTEM USA COM 199908104 75,638 38,897 105.87 1,736 124.58 0.0075
2015-05-15 2015-03-31 13F COMFORT SYSTEM USA COM 199908104 36,741 -36,073 -49.54 773 -37.96 0.0065
2015-02-13 2014-12-31 13F COMFORT SYSTEM USA COM 199908104 72,814 35,463 94.95 1,246 146.25 0.0054
2014-10-21 2014-09-30 13F COMFORT SYSTEM USA COM 199908104 37,351 224 0.60 506 -13.80 0.0045
2014-08-12 2014-06-30 13F COMFORT SYSTEM USA COM 199908104 37,127 -636 -1.68 587 2.09 0.0050
2014-05-15 2014-03-31 13F COMFORT SYSTEM USA COM 199908104 37,763 -1,014 -2.61 575 -23.54 0.0044
2014-02-11 2013-12-31 13F COMFORT SYSTEM USA COM 199908104 38,777 -2,292 -5.58 752 8.99 0.0058
2013-11-12 2013-09-30 13F COMFORT SYSTEM USA COM 199908104 41,069 1,668 4.23 690 17.35 0.0048
2013-08-13 2013-06-30 13F/A-1 COMFORT SYSTEM USA COM 199908104 39,401 39,401 588 0.0048
2013-08-08 2013-06-30 13F COMFORT SYSTEM USA COM 199908104 118,203 1,764
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.