Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionSunbelt Securities, Inc.
Latest Disclosed Ownership1,862 shares
Latest Disclosed Value $ 2,567,696
Sunbelt Securities, Inc. reports 3.56% increase in ownership of FIX / Comfort Systems USA, Inc.

On May 16, 2026 - Sunbelt Securities, Inc. filed a 13F-HR form disclosing ownership of 1,862 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $2,567,696 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 20, 2026 disclosing 1,798 shares of Comfort Systems USA, Inc.. This represents a change in shares of 3.56% 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)
2026-05-16 2026-03-31 13F COMFORT SYS USA INC COM Stock 199908104 1,862 64 3.56 2,568 53.07 0.1621
2026-02-20 2025-12-31 13F COMFORT SYS USA INC COM Stock 199908104 1,798 227 14.45 1,678 29.40 0.1119
2025-11-19 2025-09-30 13F COMFORT SYS USA INC COM Stock 199908104 1,571 676 75.53 1,297 241.95 0.0895
2025-08-14 2025-06-30 13F COMFORT SYS USA INC COM Stock 199908104 895 -491 -35.43 380 -15.02 0.0335
2025-04-24 2025-03-31 13F COMFORT SYS USA INC COM Stock 199908104 1,386 491 54.86 447 16.15 0.0399
2025-02-18 2024-12-31 13F COMFORT SYS USA INC COM Stock 199908104 895 466 108.62 384 129.94 0.0339
2024-11-18 2024-09-30 13F COMFORT SYS USA INC COM Stock 199908104 429 79 22.57 167 57.55 0.0164
2024-08-16 2024-06-30 13F COMFORT SYS USA INC COM Stock 199908104 350 63 21.95 106 16.48 0.0109
2024-04-15 2024-03-31 13F COMFORT SYS USA INC COM Stock 199908104 287 274 2,107.69 91 4,450.00 0.0102
2024-02-15 2023-12-31 13F COMFORT SYS USA INC COM Stock 199908104 13 0 0.00 3 0.00 0.0003
2023-12-11 2023-09-30 13F COMFORT SYS USA INC COM Stock 199908104 13 13 2 0.0003
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.