COMFORT SYS USA INC FIX
COM · Common Stock · CUSIP 199908104 · ISIN US1999081045
American HVAC company
- SectorIndustrials
- IndustryElectrical Work
- HeadquartersHouston, TX
- Founded1997
- Websitecomfortsystemsusa.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($30.4m this quarter). Holder counts are more reliable. Shares outstanding: 35.7m as of 2024-07-19, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $304.17. Options: 14 managers hold calls ($57.0m notional), 11 hold puts ($32.1m).
Trends to Q2 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 299 |
| Q4 2022 | 337 |
| Q1 2023 | 350 |
| Q2 2023 | 379 |
| Q3 2023 | 400 |
| Q4 2023 | 447 |
| Q1 2024 | 506 |
| Q2 2024 | 556 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 164 | 149 |
| Q1 2023 | 176 | 170 |
| Q2 2023 | 176 | 187 |
| Q3 2023 | 177 | 199 |
| Q4 2023 | 208 | 224 |
| Q1 2024 | 226 | 271 |
| Q2 2024 | 280 | 262 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2023 | $15.9m | $7.2m | 0.45 |
| Q4 2023 | $16.8m | $6.9m | 0.41 |
| Q1 2024 | $87.5m | $48.5m | 0.55 |
| Q2 2024 | $57.0m | $32.1m | 0.56 |
Biggest buyers
| MILLENNIUM MANAGEMENT LLC | Added | +283.4k |
| Capital World Investors | Added | +274.1k |
| JANE STREET GROUP, LLC | Added | +251.6k |
| Invesco Ltd. | Added | +249.5k |
| WESTFIELD CAPITAL MANAGEMENT CO LP | Added | +197.8k |
| Qube Research & Technologies Ltd | New | +154.2k |
| HRT FINANCIAL LP | New | +149.6k |
| BlackRock Inc. | Added | +137.2k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +104.8k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | New | +97.8k |
Biggest sellers
| MORGAN STANLEY | Reduced | -731.1k |
| JPMORGAN CHASE & CO | Reduced | -576.3k |
| FMR LLC | Reduced | -471.9k |
| GFI Investment Counsel Ltd. | Sold out | -254.7k |
| Nuveen Asset Management, LLC | Reduced | -235.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -223.8k |
| STATE STREET CORP | Reduced | -209.0k |
| VANGUARD GROUP INC | Reduced | -191.1k |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | -168.3k |
| Hood River Capital Management LLC | Reduced | -123.8k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $13.8m45.5k shares |
| CITADEL ADVISORS LLC | Added | $10.8m35.6k shares |
| Cubist Systematic Strategies, LLC | Added | $9.0m29.5k shares |
| Caption Management, LLC | Unchanged | $6.3m20.6k shares |
| JPMORGAN CHASE & CO | New | $5.1m16.8k shares |
| PEAK6 Investments LLC | Reduced | $4.6m15.1k shares |
| SIMPLEX TRADING, LLC | Reduced | $2.9m9.6k shares |
| WOLVERINE TRADING, LLC | Reduced | $1.6m5.1k shares |
| Walleye Capital LLC | New | $851.5k2.8k shares |
| JANE STREET GROUP, LLC | Reduced | $790.7k2.6k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $13.0m42.6k shares |
| Cubist Systematic Strategies, LLC | Added | $8.6m28.4k shares |
| Caption Management, LLC | Unchanged | $4.4m14.5k shares |
| Walleye Capital LLC | Added | $2.3m7.5k shares |
| CITADEL ADVISORS LLC | Reduced | $1.7m5.6k shares |
| JANE STREET GROUP, LLC | Reduced | $669.1k2.2k shares |
| TUDOR INVESTMENT CORP ET AL | New | $608.2k2.0k shares |
| WOLVERINE TRADING, LLC | Added | $425.8k1.4k shares |
| SIMPLEX TRADING, LLC | Reduced | $334.0k1.1k shares |
| Walleye Trading LLC | New | $30.4k100 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution -2.5 pts · filed 2026-01-21 | 8.3% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 7.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.4% |
Fell to 5% or below in the last year: FMR LLC (4.1%, 2026-05-06), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD CAPITAL MANAGEMENT LLC), Capital World Investors (4.7%, 2026-02-13)
Insider purchases and sales in Q2 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2022 | 0 | — | 7 | $7.8m | — |
| Q4 2022 | 1 | $571 | 7 | $7.3m | — |
| Q1 2023 | 0 | — | 2 | $796.6k | — |
| Q2 2023 | 0 | — | 1 | $479.8k | $479.8k |
| Q3 2023 | 0 | — | 7 | $16.4m | $563.0k |
| Q4 2023 | 1 | $150.0k | 3 | $1.9m | $580.2k |
| Q1 2024 | 0 | — | 8 | $17.7m | $899.9k |
| Q2 2024 | 0 | — | 3 | $3.8m | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-06-05 | Tang Vance W Director · By Trust | Sold | $1.1m3.5k shares |
| 2024-05-16 | BULLS HERMAN E Director | Sold | $1.2m3.5k shares |
| 2024-05-15 | Tang Vance W Director · By Trust | Sold | $338.9k988 shares |
| 2024-05-07 | ANDERSON DARCY Director | Sold | $1.2m3.5k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2024
| Manager | Shares | Change |
|---|---|---|
| BlackRock Inc. 0.03% of their portfolio | 4.6m $1.4bn | Added +137.2k |
| VANGUARD GROUP INC 0.02% of their portfolio | 3.7m $1.1bn | Reduced -191.1k |
| Capital World Investors 0.12% of their portfolio | 2.4m $738.3m | Added +274.1k |
| FMR LLC 0.03% of their portfolio | 1.7m $518.5m | Reduced -471.9k |
| Invesco Ltd. 0.10% of their portfolio | 1.5m $461.7m | Added +249.5k |
| STATE STREET CORP 0.01% of their portfolio | 1.0m $319.0m | Reduced -209.0k |
| BAILLIE GIFFORD & CO 0.25% of their portfolio | 1.0m $316.1m | Reduced -20.6k |
| WESTFIELD CAPITAL MANAGEMENT CO LP 1.29% of their portfolio | 864.9k $263.0m | Added +197.8k |
| JPMORGAN CHASE & CO 0.01% of their portfolio | 715.4k $217.6m | Reduced -576.3k |
| GEODE CAPITAL MANAGEMENT, LLC 0.02% of their portfolio | 700.2k $213.0m | Reduced -168.3k |
| DIMENSIONAL FUND ADVISORS LP 0.05% of their portfolio | 673.7k $204.9m | Reduced -47.4k |
| ALLIANCEBERNSTEIN L.P. 0.06% of their portfolio | 599.5k $182.3m | Added +83.2k |
| FULLER & THALER ASSET MANAGEMENT, INC. 0.78% of their portfolio | 596.8k $181.5m | Reduced -9.5k |
| LORD, ABBETT & CO. LLC 0.24% of their portfolio | 480.0k $146.0m | Reduced -9.2k |
| NORGES BANK 0.02% of their portfolio | 435.5k $132.4m | Added +25.0k |
| NORTHERN TRUST CORP 0.02% of their portfolio | 432.2k $131.4m | Reduced -9.7k |
| FEDERATED HERMES, INC. 0.30% of their portfolio | 415.8k $126.5m | Added +8.6k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 400.1k $121.7m | Reduced -74.2k |
| Hood River Capital Management LLC 2.24% of their portfolio | 355.9k $108.2m | Reduced -123.8k |
| MILLENNIUM MANAGEMENT LLC 0.09% of their portfolio | 342.7k $104.2m | Added +283.4k |
| MORGAN STANLEY 0.01% of their portfolio | 334.5k $101.7m | Reduced -731.1k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 320.9k $97.6m | Reduced -35.1k |
| FIRST TRUST ADVISORS LP 0.10% of their portfolio | 315.6k $96.0m | Added +22.6k |
| WELLINGTON MANAGEMENT GROUP LLP 0.02% of their portfolio | 285.2k $86.7m | Reduced -57.5k |
| CONGRESS ASSET MANAGEMENT CO 0.61% of their portfolio | 281.5k $85.6m | Added +10.2k |
| Capital International Investors 0.02% of their portfolio | 270.1k $82.1m | Unchanged |
| GOLDMAN SACHS GROUP INC 0.02% of their portfolio | 268.7k $81.7m | Reduced -98.5k |
| JANE STREET GROUP, LLC 0.09% of their portfolio | 264.5k $80.4m | Added +251.6k |
| Nuveen Asset Management, LLC 0.02% of their portfolio | 252.6k $76.8m | Reduced -235.1k |
| GW&K Investment Management, LLC 0.68% of their portfolio | 246.0k $74.8m | Reduced -65.1k |
| PRINCIPAL FINANCIAL GROUP INC 0.04% of their portfolio | 226.3k $68.8m | Reduced -32.9k |
| ROYAL LONDON ASSET MANAGEMENT LTD 0.16% of their portfolio | 211.8k $64.4m | Reduced -3.8k |
| Capital Research Global Investors 0.01% of their portfolio | 209.1k $63.6m | Unchanged |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 193.4k $58.8m | Reduced -223.8k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 171.2k $52.1m | Added +83.2k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 168.9k $51.4m | Added +79.4k |
| HENNESSY ADVISORS INC 1.94% of their portfolio | 168.6k $51.3m | Reduced -5.2k |
| FRANKLIN RESOURCES INC 0.02% of their portfolio | 164.3k $50.0m | Reduced -9.7k |
| Qube Research & Technologies Ltd 0.09% of their portfolio | 154.2k $46.9m | New |
| Driehaus Capital Management LLC 0.45% of their portfolio | 152.7k $46.4m | Added +8.4k |
| HRT FINANCIAL LP 0.26% of their portfolio | 149.6k $45.5m | New |
| SYSTEMATIC FINANCIAL MANAGEMENT LP 1.34% of their portfolio | 144.8k $44.1m | Reduced -32.6k |
| JANUS HENDERSON GROUP PLC 0.02% of their portfolio | 142.8k $43.5m | Reduced -12.4k |
| AQR CAPITAL MANAGEMENT LLC 0.07% of their portfolio | 142.5k $43.3m | Added +66.7k |
| D. E. Shaw & Co., Inc. 0.06% of their portfolio | 140.9k $42.9m | Added +90.0k |
| COMERICA BANK 0.16% of their portfolio | 126.0k $38.3m | Added +22.3k |
| ACADIAN ASSET MANAGEMENT LLC 0.11% of their portfolio | 121.9k $37.1m | Added +49.1k |
| LAZARD ASSET MANAGEMENT LLC 0.05% of their portfolio | 121.8k $37.0m | Reduced -9.4k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.06% of their portfolio | 112.5k $34.2m | Added +104.8k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 107.5k $32.7m | Added +21.2k |
| AXA S.A. 0.05% of their portfolio | 104.3k $31.7m | Added +63.8k |
| RHUMBLINE ADVISERS 0.03% of their portfolio | 101.8k $30.9m | Reduced -8.1k |
| NEUMEIER POMA INVESTMENT COUNSEL LLC 2.82% of their portfolio | 101.4k $30.8m | Reduced -77.6k |
| Blackstone Inc. 0.13% of their portfolio | 100.0k $30.4m | Reduced -30.0k |
| Boston Trust Walden Corp 0.22% of their portfolio | 99.4k $30.2m | Reduced -13.7k |
| Artemis Investment Management LLP 0.40% of their portfolio | 98.6k $30.0m | Reduced -62.0k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.69% of their portfolio | 97.8k $29.7m | New |
| PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO 0.12% of their portfolio | 97.1k $29.5m | Reduced -16.5k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.03% of their portfolio | 96.0k $29.2m | Reduced -2.7k |
| Munro Partners 1.04% of their portfolio | 92.1k $28.0m | Added +72.8k |
| Swedbank AB 0.04% of their portfolio | 90.0k $27.4m | Reduced -10.0k |
| WCM INVESTMENT MANAGEMENT, LLC 0.06% of their portfolio | 85.5k $27.0m | New |
| Allspring Global Investments Holdings, LLC 0.04% of their portfolio | 81.0k $24.6m | Reduced -13.6k |
| EULAV Asset Management 0.66% of their portfolio | 80.6k $24.5m | Reduced -1 |
| MOUNTAIN PACIFIC INVESTMENT ADVISERS LLC 1.82% of their portfolio | 80.3k $24.4m | Added +1.1k |
| NORDEA INVESTMENT MANAGEMENT AB 0.03% of their portfolio | 79.2k $24.9m | Reduced -27.0k |
| TimesSquare Capital Management, LLC 0.38% of their portfolio | 78.5k $23.9m | Added +4.6k |
| ENVESTNET ASSET MANAGEMENT INC 0.01% of their portfolio | 78.1k $23.8m | Reduced -24.5k |
| Swiss National Bank 0.01% of their portfolio | 70.2k $21.3m | Reduced -300 |
| PANAGORA ASSET MANAGEMENT INC 0.11% of their portfolio | 69.6k $21.2m | Reduced -65.8k |
| Balyasny Asset Management L.P. 0.05% of their portfolio | 66.0k $20.1m | Added +44.9k |
| California Public Employees Retirement System 0.01% of their portfolio | 65.5k $19.9m | Reduced -457 |
| TRUIST FINANCIAL CORP 0.03% of their portfolio | 63.1k $19.2m | Reduced -16.5k |
| STOREBRAND ASSET MANAGEMENT AS 0.06% of their portfolio | 61.9k $18.8m | Reduced -18.7k |
| F/m Investments LLC 0.68% of their portfolio | 61.5k $18.7m | New |
| CI INVESTMENTS INC. 0.07% of their portfolio | 60.7k $18.5m | Added +38.0k |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 0.84% of their portfolio | 60.0k $18.2m | Unchanged |
| BESSEMER GROUP INC 0.03% of their portfolio | 58.7k $17.8m | Reduced -8.2k |
| Legal & General Group Plc 0.01% of their portfolio | 58.5k $17.8m | Reduced -6.4k |
| AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio | 56.1k $17.1m | Added +26.8k |
| Retirement Systems of Alabama 0.06% of their portfolio | 54.4k $16.5m | Added +219 |
| CW Advisors, LLC 0.26% of their portfolio | 53.2k $16.2m | Added +109 |
| TWO SIGMA INVESTMENTS, LP 0.04% of their portfolio | 52.9k $16.1m | Added +49.4k |
| Cubist Systematic Strategies, LLC 0.27% of their portfolio | 51.4k $15.6m | New |
| Allianz Asset Management GmbH 0.03% of their portfolio | 51.1k $15.5m | Added +18.8k |
| RAYMOND JAMES & ASSOCIATES 0.01% of their portfolio | 47.1k $14.3m | Reduced -5.7k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 46.7k $14.2m | Reduced -14.6k |
| Man Group plc 0.04% of their portfolio | 46.4k $14.1m | Added +15.4k |
| RK Capital Management, LLC 3.75% of their portfolio | 46.1k $14.0m | Reduced -10.6k |
| Mitsubishi UFJ Trust & Banking Corp 0.03% of their portfolio | 45.7k $13.9m | Reduced -9.4k |
| Corebridge Financial, Inc. 0.08% of their portfolio | 45.5k $13.8m | First filing |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.05% of their portfolio | 44.9k $13.7m | Added +11.0k |
| Moran Wealth Management, LLC 0.43% of their portfolio | 43.3k $13.2m | Reduced -1.9k |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 43.3k $13.2m | Reduced -60.0k |
| PRUDENTIAL FINANCIAL INC 0.02% of their portfolio | 38.8k $11.8m | Added +2.3k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 38.4k $11.7m | Reduced -42.3k |
| Squarepoint Ops LLC 0.04% of their portfolio | 37.6k $11.4m | Added +21.2k |
| Russell Investments Group, Ltd. 0.02% of their portfolio | 36.7k $11.3m | Added +2.0k |
| UBS Group AG 0.00% of their portfolio | 35.8k $10.9m | Reduced -16.9k |
| Bain Capital Public Equity Management II, LLC 0.49% of their portfolio | 35.6k $10.8m | New |