Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionProShare Advisors LLC
Latest Disclosed Ownership5,022 shares
Latest Disclosed Value $ 6,925,291
ProShare Advisors LLC reports 22.86% decrease in ownership of FIX / Comfort Systems USA, Inc.

On April 24, 2026 - ProShare Advisors LLC filed a 13F-HR form disclosing ownership of 5,022 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $6,925,291 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 6,510 shares of Comfort Systems USA, Inc.. This represents a change in shares of -22.86% 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)
2026-04-24 2026-03-31 13F COMFORT SYS USA COM 199908104 5,022 -1,488 -22.86 6,925 13.99 0.0103
2026-02-06 2025-12-31 13F COMFORT SYS USA COM 199908104 6,510 5,013 334.87 6,076 391.90 0.0107
2025-11-06 2025-09-30 13F COMFORT SYS USA COM 199908104 1,497 -62 -3.98 1,235 47.90 0.0026
2025-08-07 2025-06-30 13F COMFORT SYS USA COM 199908104 1,559 47 3.11 836 71.46 0.0017
2025-05-08 2025-03-31 13F COMFORT SYS USA COM 199908104 1,512 -147 -8.86 487 -30.73 0.0011
2025-02-14 2024-12-31 13F COMFORT SYS USA COM 199908104 1,659 108 6.96 704 16.20 0.0016
2024-11-14 2024-09-30 13F COMFORT SYS USA COM 199908104 1,551 -24,898 -94.14 605 -92.48 0.0015
2024-08-13 2024-06-30 13F COMFORT SYS USA COM 199908104 26,449 -5,275 -16.63 8,044 -20.20 0.0215
2024-05-08 2024-03-31 13F COMFORT SYS USA COM 199908104 31,724 -14,284 -31.05 10,079 6.52 0.0268
2024-02-14 2023-12-31 13F COMFORT SYS USA COM 199908104 46,008 -2,449 -5.05 9,462 14.59 0.0289
2023-11-13 2023-09-30 13F COMFORT SYS USA COM 199908104 48,457 -8,400 -14.77 8,258 -11.55 0.0257
2023-08-10 2023-06-30 13F COMFORT SYS USA COM 199908104 56,857 51,709 1,004.45 9,336 1,143.01 0.0271
2023-05-26 2023-03-31 13F/A-1 COMFORT SYS USA COM 199908104 5,148 -456 -8.14 751 16.61 0.0023
2023-05-12 2023-03-31 13F COMFORT SYS USA COM 199908104 5,148 -456 751 0.0024
2023-02-02 2022-12-31 13F COMFORT SYS USA COM 199908104 5,604 722 14.79 645 35.58 0.0023
2022-11-07 2022-09-30 13F COMFORT SYS USA COM 199908104 4,882 -132 -2.63 475 13.91 0.0018
2022-08-01 2022-06-30 13F COMFORT SYS USA COM 199908104 5,014 -2,930 -36.88 417 -41.02 0.0014
2022-05-10 2022-03-31 13F COMFORT SYS USA COM 199908104 7,944 -977 -10.95 707 -19.84 0.0015
2022-02-08 2021-12-31 13F COMFORT SYS USA COM 199908104 8,921 3,414 61.99 882 124.43 0.0017
2021-11-12 2021-09-30 13F COMFORT SYS USA COM 199908104 5,507 -4,729 -46.20 393 -51.24 0.0011
2021-08-13 2021-06-30 13F COMFORT SYS USA COM 199908104 10,236 -433 -4.06 806 1.00 0.0024
2021-05-14 2021-03-31 13F COMFORT SYS USA COM 199908104 10,669 2,013 23.26 798 75.00 0.0025
2021-02-09 2020-12-31 13F COMFORT SYS USA COM 199908104 8,656 3,592 70.93 456 74.71 0.0017
2020-11-13 2020-09-30 13F COMFORT SYS USA COM 199908104 5,064 -431 -7.84 261 16.52 0.0012
2020-08-03 2020-06-30 13F COMFORT SYS USA COM 199908104 5,495 5,495 224 0.0012
2020-05-15 2020-03-31 13F COMFORT SYS USA COM 199908104 0 -5,940 -100.00 0 -100.00
2020-02-12 2019-12-31 13F COMFORT SYS USA COM 199908104 5,940 864 17.02 296 31.56 0.0014
2019-11-12 2019-09-30 13F COMFORT SYS USA COM 199908104 5,076 133 2.69 225 -10.71 0.0013
2019-08-13 2019-06-30 13F COMFORT SYS USA COM 199908104 4,943 -103 -2.04 252 -4.55 0.0015
2019-05-15 2019-03-31 13F COMFORT SYS USA COM 199908104 5,046 141 2.87 264 23.36 0.0016
2019-02-14 2018-12-31 13F COMFORT SYS USA COM 199908104 4,905 -519 -9.57 214 -30.07 0.0015
2018-11-14 2018-09-30 13F COMFORT SYS USA COM 199908104 5,424 -601 -9.98 306 10.87 0.0021
2018-08-13 2018-06-30 13F COMFORT SYS USA COM 199908104 6,025 162 2.76 276 14.05 0.0018
2018-05-14 2018-03-31 13F COMFORT SYS USA COM 199908104 5,863 -738 -11.18 242 -15.97 0.0016
2018-02-14 2017-12-31 13F COMFORT SYS USA COM 199908104 6,601 6,601 288 0.0020
2017-05-08 2017-03-31 13F/A-1 COMFORT SYS USA COM 199908104 0 -6,778 -100.00 0 -100.00
2017-02-13 2016-12-31 13F COMFORT SYS USA COM 199908104 6,778 6,778 0.00 226 0.0025
2015-01-30 2014-12-31 13F COMFORT SYS USA COM 199908104 0 -15,799 -100.00 0 -100.00
2014-11-06 2014-09-30 13F COMFORT SYS USA COM 199908104 15,799 -3,885 -19.74 214 -31.19 0.0028
2014-08-08 2014-06-30 13F COMFORT SYS USA COM 199908104 19,684 -18,756 -48.79 311 -46.93 0.0040
2014-05-07 2014-03-31 13F COMFORT SYS USA COM 199908104 38,440 38,440 57.54 586 42.93 0.0073
2014-02-04 2013-12-31 13F COMFORT SYS USA COM 199908104 0 -24,400 -100.00 0 -100.00
2013-11-07 2013-09-30 13F COMFORT SYS USA COM 199908104 24,400 -1,245 -4.85 410 7.05 0.0097
2013-07-25 2013-06-30 13F COMFORT SYS USA COM 199908104 25,645 25,645 383 0.0075
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.