Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionCetera Investment Advisers
Latest Disclosed Ownership27,946 shares
Latest Disclosed Value $ 38,537,317
Cetera Investment Advisers ownership in FIX / Comfort Systems USA, Inc.

On May 13, 2026 - Cetera Investment Advisers filed a 13F-HR form disclosing ownership of 27,946 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $38,537,317 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 28,456 shares of Comfort Systems USA, Inc.. This represents a change in shares of -1.79% during the quarter.

Cetera Investment Advisers has a history of taking positions in derivatives of the underlying security (FIX) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:FIX / Comfort Systems USA, Inc. Historical Put/Call Ratio
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 27,946 -510 -1.79 38,537 45.11 0.0410
2026-02-17 2025-12-31 13F COMFORT SYS USA COM 199908104 28,456 119 0.42 26,558 13.57 0.0290
2025-11-14 2025-09-30 13F COMFORT SYS USA COM 199908104 28,337 13,529 91.36 23,384 194.50 0.0272
2025-08-08 2025-06-30 13F COMFORT SYS USA COM 199908104 14,808 4,028 37.37 7,940 128.55 0.0134
2025-05-06 2025-03-31 13F COMFORT SYS USA COM 199908104 10,780 5,133 90.90 3,475 45.11 0.0067
2025-02-14 2024-12-31 13F COMFORT SYS USA COM 199908104 5,647 101 1.82 2,395 10.63 0.0050
2024-11-13 2024-09-30 13F COMFORT SYS USA COM 199908104 5,546 -762 -12.08 2,165 12.83 0.0047
2024-08-22 2024-06-30 13F COMFORT SYS USA COM 199908104 6,308 186 3.04 1,918 -1.34 0.0044
2024-05-24 2024-03-31 13F/A-1 COMFORT SYS USA COM 199908104 6,122 2,633 75.47 1,945 171.13 0.0046
2024-05-15 2024-03-31 13F COMFORT SYS USA COM 199908104 1,656 -1,833 526 0.0057
2024-02-13 2023-12-31 13F COMFORT SYS USA COM 199908104 3,489 -453 -11.49 718 6.86 0.0058
2023-11-14 2023-09-30 13F COMFORT SYS USA COM 199908104 3,942 460 13.21 672 17.51 0.0058
2023-08-10 2023-06-30 13F COMFORT SYS USA COM 199908104 3,482 -126 -3.49 572 8.56 0.0048
2023-05-15 2023-03-31 13F COMFORT SYS USA COM 199908104 3,608 -1,090 -23.20 527 -2.59 0.0046
2023-02-14 2022-12-31 13F COMFORT SYS USA COM 199908104 4,698 4,698 541 0.0050
2022-11-11 2022-09-30 13F COMFORT SYS USA COM 199908104 0 -2,853 -100.00 0 -100.00
2022-08-11 2022-06-30 13F COMFORT SYS USA COM 199908104 2,853 0 0.00 237 -6.69 0.0038
2022-05-13 2022-03-31 13F COMFORT SYS USA COM 199908104 2,853 0 0.00 254 -9.93 0.0036
2022-02-14 2021-12-31 13F COMFORT SYS USA COM 199908104 2,853 0 0.00 282 38.92 0.0040
2021-11-16 2021-09-30 13F COMFORT SYS USA COM 199908104 2,853 -8,175 -74.13 203 -76.64 0.0032
2021-08-13 2021-06-30 13F COMFORT SYS USA COM 199908104 11,028 7,228 190.21 869 205.99 0.0140
2021-05-17 2021-03-31 13F COMFORT SYS USA COM 199908104 3,800 -28 -0.73 284 40.59 0.0056
2021-02-17 2020-12-31 13F COMFORT SYS USA COM 199908104 3,828 3,828 202 0.0040
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-13 2026-03-31 13F COMFORT SYS USA COM Put 400 0.00 0 -100.00 n/a n/a n/a
2026-02-17 2025-12-31 13F COMFORT SYS USA COM Put 400 5 n/a n/a n/a
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.