Comfort Systems USA Inc. 13F holders
1,359 funds reported a position in Comfort Systems USA Inc. in their 13F for the quarter ended 30 June 2026, together 32.7 million shares worth $64.71 billion. Against the quarter before, 210 opened a position, 496 added, 485 trimmed and 81 sold out; together they sold a net 311,916 shares. The largest holders: BlackRock, Inc., Vanguard Capital Management LLC and Vanguard Portfolio Management LLC.
Funds holding1,359+149 on Q1 2026
Shares they held32.7Mworth $64.71 billion
Net sold on the quarter311,916 sharesabout $617.1 million at the funds' values
Funds buying to selling706 to 566opened or added, to cut or sold
Opened 210Added 496Held 162Trimmed 485Sold out 81
What each fund did in FIX against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in FIX in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
4,696 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 641 reported a position in Comfort Systems USA Inc.: 50 opened one, 222 added, 256 trimmed and 104 sold out, a net 24,091 shares sold.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 1 reported a position in Comfort Systems USA Inc. in a 13F for the quarter ended 30 September 2026, and 12 more in a 13F for an earlier quarter, the latest each has filed. The largest: FMR LLC, 1.7 million shares worth $3.29 billion, 0.1% of its reported book (its 13F for the quarter ended 30 June 2026). In the quarter, 1 fund added or opened a position and 0 trimmed or sold out; together they bought a net 34,675 shares, about $57.8 million at the funds' own value per share on 30 September 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| FMR LLC | 1,659,799 | $3.29 billion | 0.1% | +210,282 | added | 30 June 2026, an earlier quarter | 13F |
| Geode Capital Management | 1,186,025 | $1.98 billion | 0.1% | +34,675 | added | 30 September 2026 | 13F |
| Norges Bank | 471,564 | $934.6 million | 0.1% | held | 30 June 2026, an earlier quarter | 13F | |
| Baillie Gifford | 212,655 | $421.5 million | 0.4% | -12,463 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Point72 Asset Management | 179,727 | $356.2 million | 0.6% | -39,505 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Capital Research Global Investors | 95,976 | $190.2 million | 0.0% | -57,663 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Renaissance Technologies | 76,160 | $150.9 million | 0.2% | +19,500 | added | 30 June 2026, an earlier quarter | 13F |
| Bridgewater Associates | 48,506 | $96.1 million | 0.4% | -37,956 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Citadel Advisors | 46,859 | $92.9 million | 0.1% | +22,564 | added | 30 June 2026, an earlier quarter | 13F |
| Millennium Management | 36,443 | $72.2 million | 0.1% | -66,870 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Coatue Management | 17,793 | $35.3 million | 0.1% | +17,793 | new | 30 June 2026, an earlier quarter | 13F |
| Two Sigma Investments | 6,740 | $13.4 million | 0.0% | -1,654 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Alyeska | 293 | $580,711 | 0.0% | -11,526 | trimmed | 30 June 2026, an earlier quarter | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 3,397,683 | 10.39% | $6.73 billion | 0.10% | -115,244 | 13F |
| Vanguard Capital Management LLC | 2,297,509 | 7.02% | $4.55 billion | 0.10% | +11,560 | 13F |
| Vanguard Portfolio Management LLC | 1,866,170 | 5.71% | $3.70 billion | 0.17% | -15,014 | 13F |
| FMR LLC | 1,659,799 | 5.07% | $3.29 billion | 0.14% | +210,282 | 13F |
| State Street Corp. | 1,537,139 | 4.70% | $3.05 billion | 0.09% | +65,260 | 13F |
| Geode Capital Management, LLC | 1,151,350 | 3.52% | $2.29 billion | 0.12% | -87,269 | 13F |
| AQR Capital Management LLC | 1,059,017 | 3.24% | $2.08 billion | 0.73% | -57,213 | 13F |
| JPMorgan Chase & Co. | 838,417 | 2.56% | $1.63 billion | 0.10% | -51,474 | 13F |
| Capital World Investors | 720,244 | 2.20% | $1.43 billion | 0.17% | -145,536 | 13F |
| Invesco Ltd. | 658,314 | 2.01% | $1.30 billion | 0.10% | +51,734 | 13F |
| Norges Bank | 471,564 | 1.44% | $934.6 million | 0.09% | 13F | |
| Morgan Stanley | 430,085 | 1.31% | $852.4 million | 0.04% | -30,050 | 13F |
| First Trust Advisors LP | 375,090 | 1.15% | $743.4 million | 0.44% | -40,796 | 13F |
| Westfield Capital Management Co. LP | 355,433 | 1.09% | $704.5 million | 2.30% | -265,482 | 13F |
| Federated Hermes, Inc. | 341,485 | 1.04% | $676.8 million | 0.97% | +74,455 | 13F |
| Northern Trust Corp. | 340,992 | 1.04% | $675.8 million | 0.08% | +11,894 | 13F |
| Price T Rowe Associates Inc. | 324,671 | 0.99% | $643.5 million | 0.07% | +163,502 | 13F |
| Charles Schwab Investment Management Inc. | 297,845 | 0.91% | $590.3 million | 0.08% | +10,110 | 13F |
| Amundi | 292,904 | 0.90% | $580.5 million | 0.14% | +156,069 | 13F |
| Dimensional Fund Advisors LP | 285,445 | 0.87% | $565.7 million | 0.10% | +5,498 | 13F |
| Goldman Sachs Group Inc. | 268,240 | 0.82% | $531.6 million | 0.06% | +24,193 | 13F |
| Value Aligned Research Advisors, LLC | 243,607 | 0.74% | $482.8 million | 2.89% | +29,970 | 13F |
| Deutsche Bank AG | 223,896 | 0.68% | $443.8 million | 0.13% | -16,895 | 13F |
| Franklin Resources Inc. | 222,969 | 0.68% | $441.9 million | 0.10% | +19,581 | 13F |
| Massachusetts Financial Services Co. | 220,776 | 0.67% | $440.0 million | 0.14% | +220,548 | 13F |
| Arrowstreet Capital, Limited Partnership | 221,703 | 0.68% | $439.4 million | 0.20% | -31,276 | 13F |
| Baillie Gifford & Co. | 212,655 | 0.65% | $421.5 million | 0.38% | -12,463 | 13F |
| Lord, Abbett & Co. LLC | 209,302 | 0.64% | $414.8 million | 1.24% | -28,345 | 13F |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 207,953 | 0.64% | $412.2 million | 0.33% | +122,961 | 13F |
| Artisan Partners Limited Partnership | 202,113 | 0.62% | $400.6 million | 0.65% | -6,064 | 13F |
| UBS AM, a distinct business unit of UBS Asset Management Americas LLC | 201,945 | 0.62% | $400.2 million | 0.07% | +55,938 | 13F |
| Vanguard Fiduciary Trust Co. | 201,937 | 0.62% | $400.2 million | 0.09% | -1,015 | 13F |
| Legal & General Group Plc | 201,870 | 0.62% | $400.1 million | 0.08% | +48,091 | 13F |
| UBS Group AG | 192,295 | 0.59% | $381.1 million | 0.06% | +1,751 | 13F |
| Allianz Asset Management GmbH | 187,971 | 0.57% | $372.5 million | 0.34% | +68,522 | 13F |
| Bank of New York Mellon Corp | 186,926 | 0.57% | $370.5 million | 0.06% | -31,269 | 13F |
| Point72 Asset Management, L.P. | 179,727 | 0.55% | $356.2 million | 0.57% | -39,505 | 13F |
| Royal Bank of Canada | 171,195 | 0.52% | $339.3 million | 0.06% | +25,000 | 13F |
| American Century Companies Inc. | 162,875 | 0.50% | $322.8 million | 0.14% | +111,755 | 13F |
| Nuveen, LLC | 158,900 | 0.49% | $314.9 million | 0.07% | -29,571 | 13F |
| Jacobs Levy Equity Management, Inc. | 144,823 | 0.44% | $287.0 million | 1.03% | +48,602 | 13F |
| WCM Investment Management, LLC | 144,923 | 0.44% | $282.4 million | 0.51% | +28,225 | 13F |
| Capital International Investors | 141,392 | 0.43% | $280.2 million | 0.06% | -250,439 | 13F |
| Royal London Asset Management Ltd | 141,047 | 0.43% | $279.5 million | 0.52% | +2,791 | 13F |
| Voya Investment Management LLC | 138,257 | 0.42% | $273.4 million | 0.26% | +16,649 | 13F |
| Fuller & Thaler Asset Management, Inc. | 130,833 | 0.40% | $259.3 million | 0.71% | -111,363 | 13F |
| Raymond James Financial Inc. | 125,815 | 0.38% | $249.4 million | 0.07% | -9,194 | 13F |
| Temasek Holdings (Private) Ltd | 124,436 | 0.38% | $246.6 million | 0.68% | +30,080 | 13F |
| Caisse de depot et placement du Quebec | 123,032 | 0.38% | $243.8 million | 0.35% | +43,147 | 13F |
| Evercore Wealth Management, LLC | 112,392 | 0.34% | $222.8 million | 3.15% | -21,916 | 13F |
The 50 largest of the 1,359 funds that reported a position in FIX in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on FIX
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Puts | 111,600 | $221.2 million | 30 June 2026 | 13F |
| Citadel Advisors | Calls | 109,700 | $217.4 million | 30 June 2026 | 13F |
| Millennium Management | Puts | 7,700 | $15.3 million | 30 June 2026 | 13F |
| Millennium Management | Calls | 6,900 | $13.7 million | 30 June 2026 | 13F |
| Point72 Asset Management | Puts | 6,000 | $11.9 million | 30 June 2026 | 13F |
| Point72 Asset Management | Calls | 2,600 | $5.2 million | 30 June 2026 | 13F |
| Two Sigma Investments | Calls | 2,000 | $4.0 million | 30 June 2026 | 13F |
| Two Sigma Investments | Puts | 2,000 | $4.0 million | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 6 May 2026 | 13G/A | FMR LLC and 3 others | 1.4 million | 4.1% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Portfolio Management and 1 other | 1.9 million | 5.4% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Capital Management and 1 other | 2.6 million | 7.5% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 13 February 2026 | 13G/A | Capital World Investors and 1 other | 1.6 million | 4.7% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 30 January 2026 | 13G/A | The Vanguard Group and 1 other | 4.3 million | 12.2% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 21 January 2026 | 13G/A | BlackRock, Inc. and 1 other | 2.9 million | 8.3% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 4 December 2025 | 13G/A | BlackRock, Inc. and 1 other | 3.8 million | 10.8% | 30 November 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 13 November 2025 | 13G/A | Capital World Investors and 1 other | 1.8 million | 5.1% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.