Comfort Systems USA, Inc.
MX ˙ BMV ˙ US1999081045
SecurityMX:FIX / Comfort Systems USA, Inc.
InstitutionGoldman Sachs Group Inc
Latest Disclosed Ownership244,047 shares
Latest Disclosed Value $ 336,538,976
Goldman Sachs Group Inc ownership in FIX / Comfort Systems USA, Inc.

On May 15, 2026 - Goldman Sachs Group Inc filed a 13F-HR form disclosing ownership of 244,047 shares of Comfort Systems USA, Inc. (MX:FIX) valued at $336,538,976 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 197,951 shares of Comfort Systems USA, Inc.. This represents a change in shares of 23.29% during the quarter.

Goldman Sachs Group Inc has a history of taking positions in derivatives of the underlying security (FIX) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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 CMN 199908104 244,047 46,096 23.29 336,539 82.16 0.0090
2026-02-10 2025-12-31 13F COMFORT SYS USA CMN 199908104 197,951 -77,519 -28.14 184,746 -18.73 0.0228
2025-11-14 2025-09-30 13F COMFORT SYS USA CMN 199908104 275,470 23,356 9.26 227,312 68.15 0.0278
2025-08-14 2025-06-30 13F COMFORT SYS USA CMN 199908104 252,114 -80,622 -24.23 135,186 26.05 0.0184
2025-06-27 2025-03-31 13F/A-2 COMFORT SYS USA CMN 199908104 332,736 -302,278 -47.60 107,251 -60.17 0.0174
2025-05-16 2025-03-31 13F/A-1 COMFORT SYS USA CMN 199908104 332,736 -302,278 107,251 0.0174
2025-05-09 2025-03-31 13F COMFORT SYS USA CMN 199908104 332,736 -302,278 107,251 0.0032
2025-02-11 2024-12-31 13F COMFORT SYS USA CMN 199908104 635,014 56,664 9.80 269,284 19.28 0.0424
2024-11-14 2024-09-30 13F COMFORT SYS USA CMN 199908104 578,350 309,668 115.25 225,759 176.29 0.0363
2024-08-13 2024-06-30 13F COMFORT SYS USA CMN 199908104 268,682 -98,514 -26.83 81,711 -29.96 0.0138
2024-05-15 2024-03-31 13F COMFORT SYS USA CMN 199908104 367,196 98,128 36.47 116,662 110.81 0.0207
2024-05-14 2023-12-31 13F/A-2 COMFORT SYS USA CMN 199908104 269,068 114,115 73.64 55,339 109.58 0.0102
2024-03-01 2023-12-31 13F/A-1 COMFORT SYS USA CMN 199908104 269,068 114,115 55,339 0.0099
2024-02-13 2023-12-31 13F COMFORT SYS USA CMN 199908104 269,068 114,115 55,339 0.0099
2024-05-15 2023-09-30 13F/A-1 COMFORT SYS USA CMN 199908104 154,953 -91,943 -37.24 26,406 -34.87 0.0056
2023-11-14 2023-09-30 13F COMFORT SYS USA CMN 199908104 154,953 -91,943 26,406 0.0053
2024-05-14 2023-06-30 13F/A-1 COMFORT SYS USA CMN 199908104 246,896 114,926 87.08 40,540 110.47 0.0087
2023-08-15 2023-06-30 13F COMFORT SYS USA CMN 199908104 246,896 114,926 40,540 0.0082
2024-05-14 2023-03-31 13F/A-1 COMFORT SYS USA CMN 199908104 131,970 -5,855 -4.25 19,262 21.45 0.0044
2023-05-11 2023-03-31 13F COMFORT SYS USA CMN 199908104 131,970 -5,855 19,262 0.0041
2024-05-14 2022-12-31 13F/A-1 COMFORT SYS USA CMN 199908104 137,825 -45,523 -24.83 15,861 93,194.12 0.0039
2023-02-13 2022-12-31 13F COMFORT SYS USA CMN 199908104 137,825 -45,523 15,861 0.0036
2024-05-14 2022-09-30 13F/A-1 COMFORT SYS USA CMN 199908104 183,348 99,741 119.30 18 183.33 0.0045
2022-11-14 2022-09-30 13F COMFORT SYS USA CMN 199908104 183,348 99,741 17,845 0.0041
2024-05-14 2022-06-30 13F/A-2 COMFORT SYS USA CMN 199908104 83,607 8,992 12.05 7 -99.91 0.0017
2022-08-18 2022-06-30 13F/A-1 COMFORT SYS USA CMN 199908104 83,607 8,992 6,952 0.0016
2022-08-15 2022-06-30 13F COMFORT SYS USA CMN 199908104 83,607 8,992 6,952 0.0016
2022-05-16 2022-03-31 13F COMFORT SYS USA CMN 199908104 74,615 25,371 51.52 6,641 36.31 0.0014
2022-02-17 2021-12-31 13F/A-1 COMFORT SYS USA CMN 199908104 49,244 -30,406 -38.17 4,872 -14.24 0.0010
2022-02-14 2021-12-31 13F COMFORT SYS USA CMN 199908104 49,244 -30,406 4,872 0.0003
2022-01-20 2021-09-30 13F/A-1 COMFORT SYS USA CMN 199908104 79,650 -15,473 -16.27 5,681 -24.20 0.0012
2021-11-10 2021-09-30 13F COMFORT SYS USA CMN 199908104 79,650 -15,473 5,681 0.0012
2021-08-13 2021-06-30 13F COMFORT SYS USA CMN 199908104 95,123 47,302 98.91 7,495 109.59 0.0017
2021-05-17 2021-03-31 13F COMFORT SYS USA CMN 199908104 47,821 -20,583 -30.09 3,576 -0.72 0.0009
2021-02-12 2020-12-31 13F COMFORT SYS USA CMN 199908104 68,404 -91,251 -57.16 3,602 -56.20 0.0009
2020-11-13 2020-09-30 13F COMFORT SYS USA CMN 199908104 159,655 2,947 1.88 8,224 28.80 0.0023
2020-08-12 2020-06-30 13F COMFORT SYS USA CMN 199908104 156,708 18,605 13.47 6,385 26.49 0.0019
2020-05-15 2020-03-31 13F COMFORT SYS USA CMN 199908104 138,103 7,311 5.59 5,048 -22.58 0.0018
2020-02-14 2019-12-31 13F COMFORT SYS USA CMN 199908104 130,792 33,213 34.04 6,520 51.10 0.0017
2019-11-14 2019-09-30 13F COMFORT SYS USA CMN 199908104 97,579 -212,598 -68.54 4,315 -72.72 0.0012
2019-08-14 2019-06-30 13F COMFORT SYS USA CMN 199908104 310,177 -216,610 -41.12 15,815 -42.70 0.0046
2019-05-15 2019-03-31 13F COMFORT SYS USA CMN 199908104 526,787 21,267 4.21 27,599 24.99 0.0083
2019-02-14 2018-12-31 13F COMFORT SYS USA CMN 199908104 505,520 -129,991 -20.45 22,081 -38.40 0.0070
2018-11-14 2018-09-30 13F COMFORT SYS USA CMN 199908104 635,511 265,576 71.79 35,843 111.55 0.0093
2018-08-14 2018-06-30 13F COMFORT SYS USA CMN 199908104 369,935 132,785 55.99 16,943 73.21 0.0046
2018-05-15 2018-03-31 13F COMFORT SYS USA CMN 199908104 237,150 17,169 7.80 9,782 1.87 0.0025
2018-02-14 2017-12-31 13F COMFORT SYS USA CMN 199908104 219,981 111,825 103.39 9,602 148.69 0.0023
2017-11-14 2017-09-30 13F COMFORT SYS USA CMN 199908104 108,156 38,996 56.39 3,861 50.53 0.0009
2017-08-14 2017-06-30 13F COMFORT SYS USA CMN 199908104 69,160 -44,949 -39.39 2,565 -38.67 0.0007
2017-05-18 2017-03-31 13F/A-1 COMFORT SYS USA CMN 199908104 114,109 1,405 1.25 4,182 11.43 0.0011
2017-05-15 2017-03-31 13F COMFORT SYS USA CMN 199908104 114,109 4,182
2017-02-14 2016-12-31 13F COMFORT SYS USA CMN 199908104 112,704 -107,170 -48.74 3,753 -41.76 0.0011
2016-11-14 2016-09-30 13F COMFORT SYS USA CMN 199908104 219,874 -72,055 -24.68 6,444 -32.23 0.0020
2016-08-15 2016-06-30 13F COMFORT SYS USA CMN 199908104 291,929 -27,955 -8.74 9,508 -6.44 0.0031
2016-05-13 2016-03-31 13F COMFORT SYS USA CMN 199908104 319,884 96,544 43.23 10,163 60.10 0.0033
2016-02-16 2015-12-31 13F COMFORT SYS USA CMN 199908104 223,340 -3,659 -1.61 6,348 2.59 0.0020
2015-11-13 2015-09-30 13F COMFORT SYS USA CMN 199908104 226,999 139,359 159.01 6,188 207.55 0.0021
2015-08-14 2015-06-30 13F COMFORT SYS USA CMN 199908104 87,640 -1,211,616 -93.25 2,012 -92.64 0.0006
2015-05-15 2015-03-31 13F COMFORT SYS USA CMN 199908104 1,299,256 -21,194 -1.61 27,336 20.92 0.0088
2015-02-13 2014-12-31 13F COMFORT SYS USA CMN 199908104 1,320,450 28,086 2.17 22,606 29.09 0.0072
2014-11-14 2014-09-30 13F COMFORT SYS USA CMN 199908104 1,292,364 -60,542 -4.47 17,512 -18.08 0.0056
2014-08-14 2014-06-30 13F COMFORT SYS USA CMN 199908104 1,352,906 -20,988 -1.53 21,376 2.09 0.0067
2014-05-15 2014-03-31 13F COMFORT SYS USA CMN 199908104 1,373,894 -22,005 -1.58 20,938 -22.64 0.0068
2014-02-14 2013-12-31 13F COMFORT SYS USA CMN 199908104 1,395,899 -1,038,836 -42.67 27,067 -33.87 0.0089
2013-11-14 2013-09-30 13F COMFORT SYS USA CMN 199908104 2,434,735 -40,513 -1.64 40,928 10.82 0.0151
2013-08-14 2013-06-30 13F COMFORT SYS USA CMN 199908104 2,475,248 2,506 0.10 36,931 22.82 0.0142
2013-06-14 2012-12-31 13F/A-1 COMFORT SYS USA CMN 199908104 2,472,742 -6,400 -0.26 30,069 10.97 0.0125
2013-06-14 2012-09-30 13F/A-2 COMFORT SYS USA CMN 199908104 2,479,142 71,864 2.99 27,097 12.34 0.0108
2013-06-14 2012-06-30 13F/A-2 COMFORT SYS USA CMN 199908104 2,407,278 129,252 5.67 24,121 -2.95 0.0107
2013-06-14 2012-03-31 13F/A-1 COMFORT SYS USA CMN 199908104 2,278,026 2,278,026 24,853 0.0116
Disclosed Call 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 CMN Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-10 2025-12-31 13F COMFORT SYS USA CMN Call 27,000 25,199 n/a n/a n/a
2018-05-15 2018-03-31 13F COMFORT SYS USA CMN Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-02-14 2017-12-31 13F COMFORT SYS USA CMN Call 1,100 -50.00 48 -39.24 n/a n/a n/a
2017-11-14 2017-09-30 13F COMFORT SYS USA CMN Call 2,200 10.00 79 6.76 n/a n/a n/a
2017-08-14 2017-06-30 13F COMFORT SYS USA CMN Call 2,000 -25.93 74 -25.25 n/a n/a n/a
2017-05-18 2017-03-31 13F/A COMFORT SYS USA CMN Call 2,700 99 n/a n/a n/a
2017-05-15 2017-03-31 13F COMFORT SYS USA CMN Call 2,700 99 n/a n/a n/a
2017-02-14 2016-12-31 13F COMFORT SYS USA CMN Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-11-14 2016-09-30 13F COMFORT SYS USA CMN Call 100 -85.71 3 -86.96 n/a n/a n/a
2016-08-15 2016-06-30 13F COMFORT SYS USA CMN Call 700 75.00 23 76.92 n/a n/a n/a
2016-05-13 2016-03-31 13F COMFORT SYS USA CMN Call 400 -60.00 13 -53.57 n/a n/a n/a
2016-02-16 2015-12-31 13F COMFORT SYS USA CMN Call 1,000 11.11 28 12.00 n/a n/a n/a
2015-11-13 2015-09-30 13F COMFORT SYS USA CMN Call 900 25 n/a n/a n/a
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
(%)
2017-11-14 2017-09-30 13F COMFORT SYS USA CMN Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-08-14 2017-06-30 13F COMFORT SYS USA CMN Put 100 -50.00 4 -42.86 n/a n/a n/a
2017-05-18 2017-03-31 13F/A COMFORT SYS USA CMN Put 200 -33.33 7 -30.00 n/a n/a n/a
2017-05-15 2017-03-31 13F COMFORT SYS USA CMN Put 200 7 n/a n/a n/a
2017-02-14 2016-12-31 13F COMFORT SYS USA CMN Put 300 0.00 10 11.11 n/a n/a n/a
2016-11-14 2016-09-30 13F COMFORT SYS USA CMN Put 300 9 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.