Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionToroso Investments, LLC
Latest Disclosed Ownership37,200 shares
Latest Disclosed Value $ 51,194,840
Toroso Investments, LLC ownership in FIX / Comfort Systems USA, Inc.

On May 15, 2026 - Toroso Investments, LLC filed a 13F-HR form disclosing ownership of 37,200 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $51,194,840 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 16,750 shares of Comfort Systems USA, Inc.. This represents a change in shares of 122.09% during the quarter.

Toroso Investments, LLC 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)
2026-05-15 2026-03-31 13F COMFORT SYS USA COM 199908104 37,200 20,450 122.09 51,195 227.49 0.1080
2026-02-13 2025-12-31 13F COMFORT SYS USA COM 199908104 16,750 6,997 71.74 15,633 94.26 0.0371
2025-11-14 2025-09-30 13F COMFORT SYS USA COM 199908104 9,753 1,217 14.26 8,048 75.81 0.0161
2025-08-14 2025-06-30 13F COMFORT SYS USA COM 199908104 8,536 -785 -8.42 4,577 52.36 0.0275
2025-05-14 2025-03-31 13F COMFORT SYS USA COM 199908104 9,321 -868 -8.52 3,004 -30.46 0.0244
2025-02-14 2024-12-31 13F COMFORT SYS USA COM 199908104 10,189 4,986 95.83 4,321 112.81 0.0340
2024-11-25 2024-09-30 13F/A-1 COMFORT SYS USA COM 199908104 5,203 -1,738 -25.04 2,031 -3.79 0.0215
2024-11-14 2024-09-30 13F COMFORT SYS USA COM 199908104 5,203 -1,738 2,031 0.0139
2024-08-14 2024-06-30 13F COMFORT SYS USA COM 199908104 6,941 742 11.97 2,111 7.16 0.0284
2024-05-16 2024-03-31 13F COMFORT SYS USA COM 199908104 6,199 1,125 22.17 1,969 88.78 0.0325
2024-02-15 2023-12-31 13F COMFORT SYS USA COM 199908104 5,074 41 0.81 1,044 21.70 0.0243
2023-11-15 2023-09-30 13F COMFORT SYS USA COM 199908104 5,033 311 6.59 858 0.0261
2023-08-14 2023-06-30 13F COMFORT SYS USA COM 199908104 4,722 2,859 153.46 1 0.0228
2023-05-23 2023-03-31 13F/A-1 COMFORT SYS USA COM 199908104 1,863 1,863 0 0.0090
2023-05-15 2023-03-31 13F COMFORT SYS USA COM 199908104 1,863 1,863 0 0.0097
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
(%)
2026-05-15 2026-03-31 13F COMFORT SYS USA COM Put 40,000 55,160 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.