Comfort Systems USA, Inc.
US ˙ NYSE ˙ US1999081045

SecurityFIX / Comfort Systems USA, Inc.
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership18,230 shares
Latest Disclosed Value $ 25,138,988
Mackenzie Financial Corp reports 80.10% increase in ownership of FIX / Comfort Systems USA, Inc.

On May 13, 2026 - Mackenzie Financial Corp filed a 13F-HR form disclosing ownership of 18,230 shares of Comfort Systems USA, Inc. (US:FIX) valued at $25,138,988 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 10,122 shares of Comfort Systems USA, Inc.. This represents a change in shares of 80.10% during the quarter. The current value of the position is $33,726,229 USD.

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.

Upgrade to unlock premium data and export to Excel .

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 SYS USA COM 199908104 18,230 8,108 80.10 25,139 162.81 0.0302
2026-02-18 2025-12-31 13F COMFORT SYS USA COM 199908104 10,122 3,018 42.48 9,566 63.17 0.0113
2025-11-13 2025-09-30 13F COMFORT SYS USA COM 199908104 7,104 -1,409 -16.55 5,862 28.44 0.0071
2025-08-13 2025-06-30 13F COMFORT SYS USA COM 199908104 8,513 2,512 41.86 4,565 135.99 0.0059
2025-05-07 2025-03-31 13F COMFORT SYS USA COM 199908104 6,001 1,620 36.98 1,934 4.15 0.0028
2025-05-02 2024-12-31 13F/A-2 COMFORT SYS USA COM 199908104 4,381 4,381 1,858 0.0025
2025-02-20 2024-12-31 13F/A-1 COMFORT SYS USA COM 199908104 4,381 4,381 1,858 0.0024
2025-02-14 2024-12-31 13F Comfort Systems USA Common Stock 199908104 4,381 4,381 876 0.0013
2024-11-13 2024-09-30 13F COMFORT SYS USA COM 199908104 0 -4,397 -100.00 0 -100.00
2024-08-14 2024-06-30 13F COMFORT SYS USA COM 199908104 4,397 -91 -2.03 1,337 -6.18 0.0020
2024-05-10 2024-03-31 13F COMFORT SYS USA COM 199908104 4,488 1,214 37.08 1,426 111.74 0.0021
2024-01-30 2023-12-31 13F COMFORT SYS USA COM 199908104 3,274 -206 -5.92 673 17.04 0.0010
2023-10-25 2023-09-30 13F COMFORT SYS USA COM 199908104 3,480 0 0.00 575 0.52 0.0010
2023-08-03 2023-06-30 13F COMFORT SYS USA COM 199908104 3,480 -653 -15.80 572 -5.14 0.0009
2023-04-24 2023-03-31 13F COMFORT SYS USA COM 199908104 4,133 32 0.78 603 28.03 0.0009
2023-02-14 2022-12-31 13F COMFORT SYS USA COM 199908104 4,101 1,286 45.68 472 71.90 0.0008
2022-10-07 2022-09-30 13F Comfort Systems USA Common Stock 199908104 2,815 355 14.43 274 33.66 0.0005
2022-08-10 2022-06-30 13F COMFORT SYS USA COM 199908104 2,460 2,460 205 0.0003
2022-05-13 2022-03-31 13F COMFORT SYS USA COM 199908104 0 -2,091 -100.00 0 -100.00
2022-02-14 2021-12-31 13F COMFORT SYS USA COM 199908104 2,091 2,091 207 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.