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Equibles

FIX

Comfort Systems USA Inc

Company with tickers: FIX

CIK
1035983
CUSIP
199908104
Shares Outstanding
35,183,967
13F Activity (30d)
693 filings 677 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 1,192
Total Value: $46,190,914,299
Total Shares: 33,496,193
Showing 1–100 of 1,224 holdings by value · page 1 of 13

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 1,192 13F filers · Δ vs Dec 31, 2025
Top Holder
10.5%
Jun 2023 → Mar 2026 · range 10.5% – 18.1%
−2.2 pts
Top 5
31.6%
Jun 2023 → Mar 2026 · range 31.6% – 43.2%
−5.3 pts
Top 10
45.8%
Jun 2023 → Mar 2026 · range 45.8% – 54.5%
−3.7 pts
HHI
295
Jun 2023 → Mar 2026 · range 295 – 593
Broadly held −94

Quarterly Activity

vs Dec 31, 2025
New
242
Increased
444
Decreased
399
Sold Out
91
Unchanged
107
Holder count: +151
Institutional value: +46.2%
Shares held: -1.0%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega Capital International Investors +278,199 391,831
Mega JANE STREET GROUP, LLC +224,006 292,763
Mega CITADEL ADVISORS LLC +205,056 300,895
Mega JPMORGAN CHASE & CO +182,899 889,891
Mega AQR CAPITAL MANAGEMENT LLC +96,308 1,116,230

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega Capital World Investors −774,752 865,780
Mega FMR LLC −221,194 1,449,517
Large JACOBS LEVY EQUITY MANAGEMENT, INC −171,652 96,221
Large AMF Tjanstepension AB −162,078 109,590
Large Qube Research & Technologies Ltd −81,171 2,013

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 2,285,949 $3,152,300,811
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 1,881,184 $2,594,133,924
Mega VANGUARD FIDUCIARY TRUST CO 202,952 $279,868,778
Mega Vanguard Global Advisers, LLC 77,866 $107,376,435
Mega VANGUARD ASSET MANAGEMENT, Ltd 60,206 $83,023,471

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 4,310,126 $4,022,597,491
Mega NORGES BANK 503,173 $469,606,329
Mid Third Point LLC 105,000 $97,995,450
Mega T. Rowe Price Investment Management, Inc. 21,734 $20,284,124
Small Hiddenite Capital Partners LP 21,200 $19,785,748
Filter: New 242 Increased 444 Reduced 399 Sold out 91 Unchanged 107
Showing 100 of 1,224
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $4,844,291,193 10.49% 3,512,927
Mega VANGUARD CAPITAL MANAGEMENT LLC $3,152,300,811 6.82% 2,285,949
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $2,594,133,924 5.62% 1,881,184
Mega STATE STREET CORP $2,029,706,422 4.39% 1,471,879
Mega FMR LLC $1,998,869,446 4.33% 1,449,517
Mega GEODE CAPITAL MANAGEMENT, LLC $1,708,043,214 3.70% 1,238,619
Mega AQR CAPITAL MANAGEMENT LLC $1,539,270,000 3.33% 1,116,230
Mega JPMORGAN CHASE & CO $1,227,150,781 2.66% 889,891
Mega Capital World Investors $1,193,901,962 2.58% 865,780
Large WESTFIELD CAPITAL MANAGEMENT CO LP $856,235,575 1.85% 620,915
Mega Invesco Ltd. $836,467,744 1.81% 606,580
Mega MORGAN STANLEY $634,521,557 1.37% 460,135
Mega FIRST TRUST ADVISORS LP $573,502,635 1.24% 415,886
Mega Capital International Investors $540,331,030 1.17% 391,831
Mega NORTHERN TRUST CORP Bank $453,822,846 0.98% 329,098
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $396,783,687 0.86% 287,735
Mega DIMENSIONAL FUND ADVISORS LP $386,044,111 0.84% 279,947
Large FEDERATED HERMES, INC. $368,231,697 0.80% 267,030
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $348,855,511 0.76% 252,979
Mid Hood River Capital Management LLC $343,899,421 0.74% 249,385
Mega GOLDMAN SACHS GROUP INC $336,538,371 0.73% 244,047
Large FULLER & THALER ASSET MANAGEMENT, INC. $333,985,862 0.72% 242,196
Mega DEUTSCHE BANK AG\ Bank $332,048,379 0.72% 240,791
Large LORD, ABBETT & CO. LLC $327,712,836 0.71% 237,647
Large BAILLIE GIFFORD & CO $310,435,469 0.67% 225,118
Large Point72 Asset Management, L.P. $302,318,735 0.65% 219,232
Mega Bank of New York Mellon Corp Bank $300,888,712 0.65% 218,195
Large Value Aligned Research Advisors, LLC $294,603,286 0.64% 213,637
Mid Castle Hook Partners LP $288,079,284 0.62% 208,906
Large Artisan Partners Limited Partnership $287,074,001 0.62% 208,177
Mega FRANKLIN RESOURCES INC $280,470,013 0.61% 203,388
Mega VANGUARD FIDUCIARY TRUST CO Bank $279,868,778 0.61% 202,952
Mega UBS Group AG $262,758,268 0.57% 190,544
Mega Nuveen, LLC $259,899,622 0.56% 188,471
Mega PRICE T ROWE ASSOCIATES INC /MD/ $222,250,439 0.48% 161,169
Mega Clearbridge Investments, LLC $220,584,619 0.48% 159,961
Mega CITADEL ADVISORS LLC $218,018,319 0.47% 158,100
Mega Legal & General Group Plc $212,059,701 0.46% 153,779
Mega Capital Research Global Investors $211,866,644 0.46% 153,639
Large SG Americas Securities, LLC Broker-Dealer $211,617,047 0.46% 153,458
Mega JANE STREET GROUP, LLC $208,641,187 0.45% 151,300
Mega ALLIANCEBERNSTEIN L.P. $205,415,729 0.44% 148,961
Mega AMERIPRISE FINANCIAL INC $203,122,467 0.44% 147,298
Mega ROYAL BANK OF CANADA Bank $201,601,440 0.44% 146,195
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $201,342,188 0.44% 146,007
Large ROYAL LONDON ASSET MANAGEMENT LTD $190,653,641 0.41% 138,256
Mega JANE STREET GROUP, LLC $190,300,620 0.41% 138,000
Mega Amundi $188,694,094 0.41% 136,835
Mega RAYMOND JAMES FINANCIAL INC $186,176,059 0.40% 135,009
Mid Evercore Wealth Management, LLC $185,209,387 0.40% 134,308
Mega BANK OF AMERICA CORP /DE/ Bank $177,966,930 0.39% 129,056
Large Allspring Global Investments Holdings, LLC $172,358,580 0.37% 124,989
Large VOYA INVESTMENT MANAGEMENT LLC $167,696,214 0.36% 121,608
Large Allianz Asset Management GmbH $164,718,975 0.36% 119,449
Mega CITADEL ADVISORS LLC $163,410,315 0.35% 118,500
Large WCM INVESTMENT MANAGEMENT, LLC $160,925,375 0.35% 116,698
Mega JANUS HENDERSON GROUP PLC $159,105,106 0.34% 115,378
Large Zurcher Kantonalbank (Zurich Cantonalbank) Bank $157,537,196 0.34% 114,241
Large AMF Tjanstepension AB Pension $151,123,514 0.33% 109,590
Mega Swiss National Bank Bank $142,697,885 0.31% 103,480
Mega MILLENNIUM MANAGEMENT LLC $142,467,593 0.31% 103,313
Mega BARCLAYS PLC $141,994,599 0.31% 102,970
Mega PRINCIPAL FINANCIAL GROUP INC $140,862,448 0.30% 102,149
Large Russell Investments Group, Ltd. $137,743,165 0.30% 99,887
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $134,451,525 0.29% 97,500
Large JACOBS LEVY EQUITY MANAGEMENT, INC $132,687,796 0.29% 96,221
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $132,520,939 0.29% 96,100
Large GW&K Investment Management, LLC $131,933,488 0.29% 95,674
Large Temasek Holdings (Private) Ltd $130,115,980 0.28% 94,356
Large IEQ CAPITAL, LLC $123,922,935 0.27% 89,865
Large Bridgewater Associates, LP $119,230,233 0.26% 86,462
Mega DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main Bank $117,203,114 0.25% 84,992
Large KBC Group NV $116,375,723 0.25% 84,392
Mega Sumitomo Mitsui Trust Group, Inc. $113,315,745 0.25% 82,173
Large Caisse de depot et placement du Quebec $110,160,616 0.24% 79,885
Mega Mitsubishi UFJ Asset Management Co., Ltd. $109,741,403 0.24% 79,581
Mega ENVESTNET ASSET MANAGEMENT INC $108,046,624 0.23% 78,352
Mega California Public Employees Retirement System Pension $107,717,045 0.23% 78,113
Mega Vanguard Global Advisers, LLC $107,376,435 0.23% 77,866
Large Fiera Capital Corp $106,033,299 0.23% 76,892
Mid TimesSquare Capital Management, LLC $102,001,132 0.22% 73,968
Mega National Pension Service Pension $98,897,025 0.21% 71,717
Large SEI INVESTMENTS CO $97,558,026 0.21% 70,746
Mega HSBC HOLDINGS PLC $93,980,922 0.20% 68,152
Mega D. E. Shaw & Co., Inc. $93,466,562 0.20% 67,779
Large Squarepoint Ops LLC $92,000,696 0.20% 66,716
Large LAZARD ASSET MANAGEMENT LLC $91,992,422 0.20% 66,710
Mega RHUMBLINE ADVISERS $91,836,597 0.20% 66,597
Large STOREBRAND ASSET MANAGEMENT AS $88,962,781 0.19% 64,513
Mega VICTORY CAPITAL MANAGEMENT INC $88,335,341 0.19% 64,058
Mega VANGUARD ASSET MANAGEMENT, Ltd $83,023,471 0.18% 60,206
Mid Smith Group Asset Management, LLC $82,143,676 0.18% 59,568
Mega WELLS FARGO & COMPANY/MN $80,905,340 0.18% 58,670
Large KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC $79,971,766 0.17% 57,993
Large Man Group plc $79,770,433 0.17% 57,847
Large RENAISSANCE TECHNOLOGIES LLC $78,133,573 0.17% 56,660
Large CONGRESS ASSET MANAGEMENT CO $76,109,216 0.16% 55,192
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $74,846,061 0.16% 54,276
Mega AMERICAN CENTURY COMPANIES INC $70,493,968 0.15% 51,120
Mega BNP PARIBAS ARBITRAGE, SA $69,341,133 0.15% 50,284

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