Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionWcm Investment Management, Llc
Latest Disclosed Ownership116,698 shares
Latest Disclosed Value $ 148,577,560
Wcm Investment Management, Llc reports 24.54% increase in ownership of FIX / Comfort Systems USA, Inc.

On May 7, 2026 - Wcm Investment Management, Llc filed a 13F-HR form disclosing ownership of 116,698 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $148,577,560 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 93,706 shares of Comfort Systems USA, Inc.. This represents a change in shares of 24.54% 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)
2026-05-07 2026-03-31 13F COMFORT SYS USA COM 199908104 116,698 22,992 24.54 148,578 67.44 0.2916
2026-02-09 2025-12-31 13F COMFORT SYS USA COM 199908104 93,706 12,883 15.94 88,733 36.93 0.1827
2025-11-04 2025-09-30 13F COMFORT SYS USA COM 199908104 80,823 31,231 62.98 64,804 144.25 0.1348
2025-07-29 2025-06-30 13F COMFORT SYS USA COM 199908104 49,592 3,009 6.46 26,532 75.73 0.0606
2025-04-28 2025-03-31 13F COMFORT SYS USA COM 199908104 46,583 5,634 13.76 15,098 -14.11 0.0388
2025-02-11 2024-12-31 13F/A-1 COMFORT SYS USA COM 199908104 40,949 -58,604 -58.87 17,579 -54.73 0.0413
2025-01-28 2024-12-31 13F COMFORT SYS USA COM 199908104 40,949 -58,604 17,579 0.0413
2024-11-04 2024-09-30 13F COMFORT SYS USA COM 199908104 99,553 14,090 16.49 38,833 43.82 0.0880
2024-07-31 2024-06-30 13F COMFORT SYS USA COM 199908104 85,463 85,463 27,000 0.0638
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.