Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionQuantinno Capital Management LP
Latest Disclosed Ownership12,879 shares
Latest Disclosed Value $ 17,760,561
Quantinno Capital Management LP reports 19.55% increase in ownership of FIX / Comfort Systems USA, Inc.

On May 15, 2026 - Quantinno Capital Management LP filed a 13F-HR form disclosing ownership of 12,879 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $17,760,561 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 10,773 shares of Comfort Systems USA, Inc.. This represents a change in shares of 19.55% 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)
2026-05-15 2026-03-31 13F COMFORT SYS USA COM 199908104 12,879 2,106 19.55 17,761 76.63 0.0296
2026-02-17 2025-12-31 13F COMFORT SYS USA COM 199908104 10,773 4,599 74.49 10,055 97.35 0.0202
2025-11-14 2025-09-30 13F COMFORT SYS USA COM 199908104 6,174 1,934 45.61 5,095 124.15 0.0139
2025-08-14 2025-06-30 13F COMFORT SYS USA COM 199908104 4,240 655 18.27 2,274 96.80 0.0098
2025-05-12 2025-03-31 13F COMFORT SYS USA COM 199908104 3,585 1,299 56.82 1,156 19.20 0.0075
2025-02-14 2024-12-31 13F COMFORT SYS USA COM 199908104 2,286 -1,441 -38.66 969 -33.36 0.0095
2024-11-14 2024-09-30 13F COMFORT SYS USA COM 199908104 3,727 416 12.56 1,455 44.53 0.0189
2024-08-14 2024-06-30 13F COMFORT SYS USA COM 199908104 3,311 299 9.93 1,007 5.12 0.0181
2024-05-14 2024-03-31 13F COMFORT SYS USA COM 199908104 3,012 -611 -16.86 957 28.46 0.0208
2024-02-14 2023-12-31 13F COMFORT SYS USA COM 199908104 3,623 12 0.33 745 21.14 0.0261
2023-11-14 2023-09-30 13F COMFORT SYS USA COM 199908104 3,611 -289 -7.41 615 -3.91 0.0280
2023-08-04 2023-06-30 13F COMFORT SYS USA COM 199908104 3,900 673 20.86 640 35.88 0.0366
2023-05-03 2023-03-31 13F COMFORT SYS USA COM 199908104 3,227 -69 -2.09 471 24.27 0.0311
2023-02-13 2022-12-31 13F COMFORT SYS USA COM 199908104 3,296 -545 -14.19 379 1.34 0.0283
2022-11-08 2022-09-30 13F COMFORT SYS USA COM 199908104 3,841 0 0.00 374 17.24 0.0482
2022-08-15 2022-06-30 13F COMFORT SYS USA COM 199908104 3,841 0 0.00 319 -6.73 0.0460
2022-05-12 2022-03-31 13F COMFORT SYS USA COM 199908104 3,841 0 0.00 342 -10.00 0.0522
2022-02-14 2021-12-31 13F COMFORT SYS USA COM 199908104 3,841 -4,882 -55.97 380 -38.91 0.0688
2021-11-15 2021-09-30 13F COMFORT SYS USA COM 199908104 8,723 0 0.00 622 -9.46 0.6944
2021-08-16 2021-06-30 13F COMFORT SYS USA COM 199908104 8,723 0 0.00 687 5.37 0.7789
2021-05-17 2021-03-31 13F COMFORT SYS USA COM 199908104 8,723 -1,834 -17.37 652 17.27 0.7107
2021-02-09 2020-12-31 13F COMFORT SYS USA COM 199908104 10,557 893 9.24 556 11.65 0.4298
2020-11-16 2020-09-30 13F COMFORT SYS USA COM 199908104 9,664 -1,825 -15.88 498 6.41 0.3331
2020-08-14 2020-06-30 13F COMFORT SYS USA COM 199908104 11,489 11,489 468 0.4615
2019-11-14 2019-09-30 13F COMFORT SYS USA COM 199908104 0 -7,821 -100.00 0 -100.00
2019-08-14 2019-06-30 13F COMFORT SYS USA COM 199908104 7,821 -1,910 -19.63 399 -21.76 0.2342
2019-05-14 2019-03-31 13F COMFORT SYS USA COM 199908104 9,731 3,238 49.87 510 79.58 0.3267
2019-02-14 2018-12-31 13F COMFORT SYS USA COM 199908104 6,493 6,493 284 0.2313
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.