Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionFifth Third Bancorp
Latest Disclosed Ownership4,905 shares
Latest Disclosed Value $ 6,763,309
Fifth Third Bancorp reports 193.89% increase in ownership of FIX / Comfort Systems USA, Inc.

On May 1, 2026 - Fifth Third Bancorp filed a 13F-HR form disclosing ownership of 4,905 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $6,763,309 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 1,669 shares of Comfort Systems USA, Inc.. This represents a change in shares of 193.89% 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)
2026-05-01 2026-03-31 13F COMFORT SYS USA COM 199908104 4,905 3,236 193.89 6,763 334.36 0.0124
2026-02-02 2025-12-31 13F COMFORT SYS USA COM 199908104 1,669 -73 -4.19 1,558 8.35 0.0049
2025-11-07 2025-09-30 13F COMFORT SYS USA COM 199908104 1,742 3 0.17 1,437 54.18 0.0046
2025-07-15 2025-06-30 13F COMFORT SYS USA COM 199908104 1,739 34 1.99 932 69.76 0.0032
2025-04-15 2025-03-31 13F COMFORT SYS USA COM 199908104 1,705 -354 -17.19 550 -37.11 0.0021
2025-01-21 2024-12-31 13F COMFORT SYS USA COM 199908104 2,059 -18 -0.87 873 7.78 0.0032
2024-10-17 2024-09-30 13F COMFORT SYS USA COM 199908104 2,077 40 1.96 811 30.86 0.0029
2024-07-22 2024-06-30 13F COMFORT SYS USA COM 199908104 2,037 -150 -6.86 619 -10.81 0.0024
2024-04-23 2024-03-31 13F COMFORT SYS USA COM 199908104 2,187 -255 -10.44 695 38.25 0.0027
2024-01-19 2023-12-31 13F COMFORT SYS USA COM 199908104 2,442 310 14.54 502 38.29 0.0021
2023-10-31 2023-09-30 13F COMFORT SYS USA COM 199908104 2,132 -150 -6.57 363 -2.94 0.0017
2023-07-26 2023-06-30 13F COMFORT SYS USA COM 199908104 2,282 -235 -9.34 375 1.91 0.0017
2023-04-24 2023-03-31 13F COMFORT SYS USA COM 199908104 2,517 -139 -5.23 367 20.33 0.0017
2023-01-25 2022-12-31 13F COMFORT SYS USA COM 199908104 2,656 -12 -0.45 306 17.31 0.0015
2022-10-25 2022-09-30 13F COMFORT SYS USA COM 199908104 2,668 -53 -1.95 260 15.04 0.0014
2022-08-04 2022-06-30 13F COMFORT SYS USA COM 199908104 2,721 0 0.00 226 -6.61 0.0011
2022-04-19 2022-03-31 13F COMFORT SYS USA COM 199908104 2,721 -90 -3.20 242 -12.95 0.0010
2022-02-01 2021-12-31 13F COMFORT SYS USA COM 199908104 2,811 -48 -1.68 278 36.27 0.0011
2021-10-15 2021-09-30 13F COMFORT SYS USA COM 199908104 2,859 22 0.78 204 -8.93 0.0009
2021-08-06 2021-06-30 13F COMFORT SYS USA COM 199908104 2,837 2,325 454.10 224 489.47 0.0010
2021-05-07 2021-03-31 13F COMFORT SYS USA COM 199908104 512 -107 -17.29 38 15.15 0.0002
2021-02-16 2020-12-31 13F COMFORT SYS USA COM 199908104 619 -3,391 -84.56 33 -84.06 0.0002
2020-11-09 2020-09-30 13F COMFORT SYS USA COM 199908104 4,010 -2,636 -39.66 207 -23.62 0.0011
2020-08-05 2020-06-30 13F COMFORT SYS USA COM 199908104 6,646 -244 -3.54 271 7.54 0.0016
2020-05-05 2020-03-31 13F COMFORT SYS USA COM 199908104 6,890 232 3.48 252 -24.10 0.0018
2020-02-14 2019-12-31 13F COMFORT SYS USA COM 199908104 6,658 -1,613 -19.50 332 -9.29 0.0018
2019-11-14 2019-09-30 13F COMFORT SYS USA COM 199908104 8,271 1,397 20.32 366 4.27 0.0022
2019-08-07 2019-06-30 13F COMFORT SYS USA COM 199908104 6,874 -492 -6.68 351 -9.07 0.0021
2019-05-14 2019-03-31 13F COMFORT SYS USA COM 199908104 7,366 -2,291 -23.72 386 -8.53 0.0025
2019-02-14 2018-12-31 13F COMFORT SYS USA COM 199908104 9,657 -387 -3.85 422 -25.44 0.0031
2018-11-14 2018-09-30 13F COMFORT SYS USA COM 199908104 10,044 -2,611 -20.63 566 -2.41 0.0036
2018-08-14 2018-06-30 13F COMFORT SYS USA COM 199908104 12,655 -491 -3.73 580 7.01 0.0039
2018-05-15 2018-03-31 13F COMFORT SYS USA COM 199908104 13,146 -2,135 -13.97 542 -18.74 0.0037
2018-02-14 2017-12-31 13F COMFORT SYS USA COM 199908104 15,281 1,274 9.10 667 33.40 0.0045
2017-11-14 2017-09-30 13F COMFORT SYS USA COM 199908104 14,007 -264 -1.85 500 -5.48 0.0036
2017-08-11 2017-06-30 13F COMFORT SYS USA COM 199908104 14,271 -2,061 -12.62 529 -11.69 0.0039
2017-05-12 2017-03-31 13F COMFORT SYS USA COM 199908104 16,332 -2,028 -11.05 599 -1.96 0.0045
2017-02-13 2016-12-31 13F/A-1 COMFORT SYS USA COM 199908104 18,360 -1,391 -7.04 611 5.53 0.0049
2017-02-09 2016-12-31 13F COMFORT SYS USA COM 199908104 19,751 0 579 0.0048
2016-11-10 2016-09-30 13F COMFORT SYS USA COM 199908104 19,751 2,227 12.71 579 1.40 0.0048
2016-08-11 2016-06-30 13F COMFORT SYS USA COM 199908104 17,524 666 3.95 571 6.53 0.0048
2016-05-13 2016-03-31 13F COMFORT SYS USA COM 199908104 16,858 1,313 8.45 536 21.27 0.0046
2016-02-16 2015-12-31 13F COMFORT SYS USA COM 199908104 15,545 14,998 2,741.86 442 2,846.67 0.0039
2015-11-13 2015-09-30 13F COMFORT SYS USA COM 199908104 547 -313 -36.40 15 -25.00 0.0001
2015-08-14 2015-06-30 13F COMFORT SYS USA COM 199908104 860 34 4.12 20 17.65 0.0002
2015-05-14 2015-03-31 13F COMFORT SYS USA COM 199908104 826 -2,069 -71.47 17 -66.00 0.0001
2015-02-13 2014-12-31 13F COMFORT SYS USA COM 199908104 2,895 0 0.00 50 28.21 0.0004
2014-11-17 2014-09-30 13F COMFORT SYS USA COM 199908104 2,895 2,191 311.22 39 254.55 0.0004
2014-08-14 2014-06-30 13F COMFORT SYS USA COM 199908104 704 704 11 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.