Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionQuantbot Technologies LP
Latest Disclosed Ownership1,498 shares
Latest Disclosed Value $ 2,065,727
Quantbot Technologies LP reports 61.97% decrease in ownership of FIX / Comfort Systems USA, Inc.

On May 13, 2026 - Quantbot Technologies LP filed a 13F-HR form disclosing ownership of 1,498 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $2,065,727 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 3,939 shares of Comfort Systems USA, Inc.. This represents a change in shares of -61.97% 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 SYSTEMS USA COM 199908104 1,498 -2,441 -61.97 2,066 -43.82 0.0845
2026-02-10 2025-12-31 13F COMFORT SYSTEMS USA COM 199908104 3,939 3,939 3,676 0.1223
2025-05-13 2025-03-31 13F COMFORT SYSTEMS USA COM 199908104 0 -8,323 -100.00 0 -100.00
2025-02-11 2024-12-31 13F COMFORT SYSTEMS USA COM 199908104 8,323 8,323 3,529 0.1290
2023-05-12 2023-03-31 13F COMFORT SYSTEMS USA COM 199908104 0 -4,038 -100.00 0 -100.00
2023-02-13 2022-12-31 13F COMFORT SYSTEMS USA COM 199908104 4,038 4,038 465 0.0333
2022-02-11 2021-12-31 13F COMFORT SYSTEMS USA COM 199908104 0 -100 -100.00 0 -100.00
2021-11-09 2021-09-30 13F COMFORT SYSTEMS USA COM 199908104 100 -427 -81.02 7 -82.93 0.0005
2021-08-12 2021-06-30 13F COMFORT SYSTEMS USA COM 199908104 527 527 41 0.0032
2021-05-14 2021-03-31 13F COMFORT SYSTEMS USA COM 199908104 0 -39 -100.00 0 -100.00
2021-02-12 2020-12-31 13F COMFORT SYSTEMS USA COM 199908104 39 -3,418 -98.87 2 -98.88 0.0002
2020-11-16 2020-09-30 13F COMFORT SYSTEMS USA COM 199908104 3,457 312 9.92 178 39.06 0.0204
2020-08-13 2020-06-30 13F COMFORT SYSTEMS USA COM 199908104 3,145 2,835 914.52 128 1,063.64 0.0169
2020-05-13 2020-03-31 13F COMFORT SYSTEMS USA COM 199908104 310 310 -90.14 11 -91.41 0.0072
2020-02-10 2019-12-31 13F COMFORT SYSTEMS USA COM 199908104 0 -11,018 -100.00 0 -100.00
2019-11-12 2019-09-30 13F COMFORT SYSTEMS USA COM 199908104 11,018 10,518 2,103.60 487 1,848.00 0.0480
2019-08-13 2019-06-30 13F COMFORT SYSTEMS USA COM 199908104 500 -2,800 -84.85 25 -85.47 0.0025
2019-05-13 2019-03-31 13F COMFORT SYSTEMS USA COM 199908104 3,300 -33,500 -91.03 172 -89.30 0.0164
2019-02-13 2018-12-31 13F COMFORT SYSTEMS USA COM 199908104 36,800 27,301 287.41 1,607 200.37 0.1573
2018-11-13 2018-09-30 13F COMFORT SYSTEMS USA COM 199908104 9,499 9,499 -74.19 535 -66.71 0.0374
2018-02-12 2017-12-31 13F COMFORT SYSTEMS USA COM 199908104 0 -20,600 -100.00 0 -100.00
2017-11-07 2017-09-30 13F COMFORT SYSTEMS USA COM 199908104 20,600 20,600 735 0.0705
2017-05-10 2017-03-31 13F COMFORT SYSTEMS USA COM 199908104 0 -16,663 -100.00 0 -100.00
2017-02-09 2016-12-31 13F COMFORT SYSTEMS USA COM 199908104 16,663 16,059 2,658.77 554 3,158.82 0.0614
2016-10-31 2016-09-30 13F COMFORT SYSTEMS USA COM 199908104 604 -1,154 -65.64 17 -70.18 0.0019
2016-08-02 2016-06-30 13F COMFORT SYSTEMS USA COM 199908104 1,758 1,598 998.75 57 1,040.00 0.0061
2016-04-28 2016-03-31 13F COMFORT SYSTEMS USA COM 199908104 160 160 5 0.0008
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.