Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionBalyasny Asset Management Llc
Latest Disclosed Ownership5,928 shares
Latest Disclosed Value $ 8,174,653
Balyasny Asset Management Llc reports 25.61% decrease in ownership of FIX / Comfort Systems USA, Inc.

On May 15, 2026 - Balyasny Asset Management Llc filed a 13F-HR form disclosing ownership of 5,928 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $8,174,653 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 7,969 shares of Comfort Systems USA, Inc.. This represents a change in shares of -25.61% 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 5,928 -2,041 -25.61 8,175 9.91 0.0098
2026-02-17 2025-12-31 13F COMFORT SYS USA COM 199908104 7,969 7,969 7,437 0.0094
2025-11-14 2025-09-30 13F COMFORT SYS USA COM 199908104 0 -34,682 -100.00 0 -100.00
2025-08-14 2025-06-30 13F COMFORT SYS USA COM 199908104 34,682 -8,875 -20.38 18,597 32.46 0.0280
2025-05-15 2025-03-31 13F COMFORT SYS USA COM 199908104 43,557 27,423 169.97 14,040 105.22 0.0232
2025-02-14 2024-12-31 13F COMFORT SYS USA COM 199908104 16,134 14,789 1,099.55 6,842 1,203.05 0.0102
2024-11-14 2024-09-30 13F COMFORT SYS USA COM 199908104 1,345 -64,695 -97.96 525 -97.39 0.0009
2024-08-14 2024-06-30 13F COMFORT SYS USA COM 199908104 66,040 44,878 212.07 20,084 198.74 0.0351
2024-05-13 2024-03-31 13F COMFORT SYS USA COM 199908104 21,162 11,393 116.62 6,723 234.64 0.0117
2024-02-14 2023-12-31 13F COMFORT SYS USA COM 199908104 9,769 -128,202 -92.92 2,009 -91.46 0.0038
2023-11-14 2023-09-30 13F COMFORT SYS USA COM 199908104 137,971 40,841 42.05 23,512 47.42 0.0480
2023-08-14 2023-06-30 13F COMFORT SYS USA COM 199908104 97,130 97,130 15,949 0.0351
2023-05-15 2023-03-31 13F COMFORT SYS USA COM 199908104 0 -5,342 -100.00 0 -100.00
2023-02-14 2022-12-31 13F COMFORT SYS USA COM 199908104 5,342 -4,555 -46.02 615 -36.24 0.0017
2022-11-15 2022-09-30 13F COMFORT SYS USA COM 199908104 9,897 9,897 963 0.0030
2022-05-16 2022-03-31 13F COMFORT SYS USA COM 199908104 0 -6,211 -100.00 0 -100.00
2022-02-14 2021-12-31 13F COMFORT SYS USA COM 199908104 6,211 -623 -9.12 615 26.28 0.0021
2021-12-01 2021-09-30 13F/A-1 COMFORT SYS USA COM 199908104 6,834 -4,360 -38.95 487 -44.78 0.0020
2021-11-15 2021-09-30 13F COMFORT SYS USA COM 199908104 6,834 -4,360 487 0.0020
2021-08-16 2021-06-30 13F COMFORT SYS USA COM 199908104 11,194 7,684 218.92 882 236.64 0.0042
2021-05-17 2021-03-31 13F COMFORT SYS USA COM 199908104 3,510 3,510 262 0.0013
2020-05-15 2020-03-31 13F COMFORT SYS USA COM 199908104 0 -8,807 -100.00 0 -100.00
2020-02-14 2019-12-31 13F COMFORT SYS USA COM 199908104 8,807 8,807 439 0.0026
2019-11-14 2019-09-30 13F COMFORT SYS USA COM 199908104 0 -23,676 -100.00 0 -100.00
2019-08-14 2019-06-30 13F COMFORT SYS USA COM 199908104 23,676 -2,754 -10.42 1,207 -12.85 0.0077
2019-05-15 2019-03-31 13F COMFORT SYS USA COM 199908104 26,430 26,430 1,385 0.0092
2018-08-14 2018-06-30 13F COMFORT SYS USA COM 199908104 0 -9,734 -100.00 0 -100.00
2018-05-15 2018-03-31 13F COMFORT SYS USA COM 199908104 9,734 3,134 47.48 402 86.98 0.0017
2016-08-15 2016-06-30 13F Comfort Systems USA Common Stock 199908104 6,600 6,600 215 0.0014
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.