Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership415,886 shares
Latest Disclosed Value $ 573,501,909
First Trust Advisors Lp reports 13.73% decrease in ownership of FIX / Comfort Systems USA, Inc.

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 415,886 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $573,501,909 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 482,099 shares of Comfort Systems USA, Inc.. This represents a change in shares of -13.73% 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 COMFORT SYS USA COM 199908104 415,886 -66,213 -13.73 573,502 27.46 0.4087
2026-02-13 2025-12-31 13F COMFORT SYS USA COM 199908104 482,099 -31,158 -6.07 449,939 6.24 0.3270
2025-11-12 2025-09-30 13F COMFORT SYS USA COM 199908104 513,257 117,892 29.82 423,529 99.78 0.3147
2025-08-13 2025-06-30 13F COMFORT SYS USA COM 199908104 395,365 -100,773 -20.31 211,999 32.57 0.1705
2025-05-14 2025-03-31 13F COMFORT SYS USA COM 199908104 496,138 32,348 6.97 159,920 -18.69 0.1416
2025-02-13 2024-12-31 13F COMFORT SYS USA COM 199908104 463,790 105,756 29.54 196,675 40.72 0.1734
2024-11-13 2024-09-30 13F COMFORT SYS USA COM 199908104 358,034 42,407 13.44 139,759 45.60 0.1331
2024-08-13 2024-06-30 13F COMFORT SYS USA COM 199908104 315,627 22,593 7.71 95,988 3.10 0.0979
2024-05-13 2024-03-31 13F COMFORT SYS USA COM 199908104 293,034 109,717 59.85 93,100 146.93 0.0945
2024-02-13 2023-12-31 13F COMFORT SYS USA COM 199908104 183,317 38,955 26.98 37,703 53.26 0.0411
2023-11-13 2023-09-30 13F COMFORT SYS USA COM 199908104 144,362 -1,915 -1.31 24,601 2.42 0.0292
2023-08-14 2023-06-30 13F COMFORT SYS USA COM 199908104 146,277 44,550 43.79 24,019 61.76 0.0273
2023-05-15 2023-03-31 13F COMFORT SYS USA COM 199908104 101,727 17,824 21.24 14,848 53.79 0.0171
2023-02-09 2022-12-31 13F COMFORT SYS USA COM 199908104 83,903 -26,781 -24.20 9,656 -10.38 0.0115
2022-11-14 2022-09-30 13F COMFORT SYS USA COM 199908104 110,684 -796 -0.71 10,773 16.21 0.0140
2022-08-12 2022-06-30 13F COMFORT SYS USA COM 199908104 111,480 19,541 21.25 9,270 13.28 0.0114
2022-05-13 2022-03-31 13F COMFORT SYS USA COM 199908104 91,939 -66,490 -41.97 8,183 -47.80 0.0084
2022-02-08 2021-12-31 13F COMFORT SYS USA COM 199908104 158,429 38,421 32.02 15,675 83.14 0.0152
2021-11-15 2021-09-30 13F COMFORT SYS USA COM 199908104 120,008 -28,052 -18.95 8,559 -26.63 0.0092
2021-10-12 2021-06-30 13F/A-1 COMFORT SYS USA COM 199908104 148,060 -33,764 -18.57 11,666 -14.19 0.0126
2021-08-16 2021-06-30 13F COMFORT SYS USA COM 199908104 148,060 -33,764 11,666 0.0120
2021-05-14 2021-03-31 13F COMFORT SYS USA COM 199908104 181,824 91,256 100.76 13,595 185.07 0.0165
2021-02-02 2020-12-31 13F COMFORT SYS USA COM 199908104 90,568 25,079 38.29 4,769 41.39 0.0063
2020-11-05 2020-09-30 13F COMFORT SYS USA COM 199908104 65,489 15,227 30.30 3,373 64.70 0.0054
2020-07-22 2020-06-30 13F COMFORT SYS USA COM 199908104 50,262 -4,063 -7.48 2,048 3.12 0.0035
2020-05-06 2020-03-31 13F COMFORT SYS USA COM 199908104 54,325 -14,193 -20.71 1,986 -41.86 0.0045
2020-02-03 2019-12-31 13F COMFORT SYS USA COM 199908104 68,518 -30,794 -31.01 3,416 -22.24 0.0058
2019-11-04 2019-09-30 13F COMFORT SYS USA COM 199908104 99,312 -17,087 -14.68 4,393 -25.98 0.0083
2019-07-30 2019-06-30 13F COMFORT SYS USA COM 199908104 116,399 -7,515 -6.06 5,935 -8.58 0.0112
2019-06-19 2019-03-31 13F/A-1 COMFORT SYS USA COM 199908104 123,914 -54,555 -30.57 6,492 -16.73 0.0129
2019-05-09 2019-03-31 13F COMFORT SYS USA COM 199908104 123,914 -54,555 6,492
2019-02-07 2018-12-31 13F COMFORT SYS USA COM 199908104 178,469 14,993 9.17 7,796 -15.44 0.0185
2018-10-25 2018-09-30 13F COMFORT SYS USA COM 199908104 163,476 17,704 12.14 9,220 38.11 0.0172
2018-08-02 2018-06-30 13F COMFORT SYS USA COM 199908104 145,772 -16,995 -10.44 6,676 -0.57 0.0138
2018-04-23 2018-03-31 13F COMFORT SYS USA COM 199908104 162,767 859 0.53 6,714 -5.00 0.0154
2018-02-08 2017-12-31 13F COMFORT SYS USA COM 199908104 161,908 9,464 6.21 7,067 29.86 0.0168
2017-10-24 2017-09-30 13F COMFORT SYS USA COM 199908104 152,444 15,308 11.16 5,442 6.96 0.0140
2017-08-02 2017-06-30 13F COMFORT SYS USA COM 199908104 137,136 -81,281 -37.21 5,088 -36.44 0.0136
2017-05-02 2017-03-31 13F COMFORT SYS USA COM 199908104 218,417 81,727 59.79 8,005 75.86 0.0222
2017-02-06 2016-12-31 13F COMFORT SYS USA COM 199908104 136,690 55,100 67.53 4,552 90.38 0.0135
2016-11-01 2016-09-30 13F COMFORT SYS USA COM 199908104 81,590 -4,405 -5.12 2,391 -14.64 0.0071
2016-08-04 2016-06-30 13F COMFORT SYS USA COM 199908104 85,995 -26,708 -23.70 2,801 -21.78 0.0088
2016-05-10 2016-03-31 13F COMFORT SYS USA COM 199908104 112,703 62,391 124.01 3,581 150.42 0.0115
2016-05-04 2015-12-31 13F/A-1 COMFORT SYS USA COM 199908104 50,312 -14,609 -22.50 1,430 -19.21 0.0037
2016-02-03 2015-12-31 13F COMFORT SYS USA COM 199908104 50,312 1,430
2015-11-05 2015-09-30 13F COMFORT SYS USA COM 199908104 64,921 -55,369 -46.03 1,770 -35.89 0.0051
2015-08-04 2015-06-30 13F COMFORT SYS USA COM 199908104 120,290 -22,116 -15.53 2,761 -7.84 0.0072
2015-05-04 2015-03-31 13F COMFORT SYS USA COM 199908104 142,406 -170,626 -54.51 2,996 -44.09 0.0088
2015-02-13 2014-12-31 13F COMFORT SYS USA COM 199908104 313,032 85,565 37.62 5,359 73.88 0.0181
2014-11-12 2014-09-30 13F COMFORT SYS USA COM 199908104 227,467 37,796 19.93 3,082 2.84 0.0121
2014-08-11 2014-06-30 13F COMFORT SYS USA COM 199908104 189,671 70,975 59.80 2,997 65.67 0.0125
2014-05-12 2014-03-31 13F COMFORT SYS USA COM 199908104 118,696 92,160 347.30 1,809 251.26 0.0079
2014-08-08 2013-12-31 13F/A-1 COMFORT SYS USA COM 199908104 26,536 26,536 515 0.0025
2014-02-13 2013-12-31 13F COMFORT SYS USA COM 199908104 26,536 515 0.0023
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.