FIX Comfort Systems USA, Inc.
Comfort Systems USA, Inc. (FIX) Hedge Fund Activity
This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.
Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.
Most significant moves
Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.
| Fund | Action | Shares changed | Change | Est. value | Portfolio wt. | Score |
|---|---|---|---|---|---|---|
| Castle Hook Partners Event Long/Short | Reduced | -110.4K | -52.9% | $218.9M | 2.1% | 74 |
| COATUE MANAGEMENT LLC Growth Tech | New | +17.8K | — | $35.3M | 0.1% | 65 |
| MARSHALL WACE, LLP Long/Short | Sold Out | -2.1K | -100.0% | $4.1M | 0.0% | 58 |
| Balyasny Asset Management L.P. | Increased | +34.8K | +587.8% | $69.1M | 0.2% | 58 |
| Capital Fund Management Quant Macro | Sold Out | -16.4K | -100.0% | $32.4M | 0.0% | 58 |
| Voloridge Investment Management Quant | Sold Out | -5.2K | -100.0% | $10.3M | 0.0% | 58 |
| Quadrature Capital Quant | Sold Out | -5.3K | -100.0% | $10.5M | 0.0% | 57 |
| Squarepoint Ops LLC Quant | Reduced | -64.2K | -96.2% | $127.2M | 0.0% | 57 |
| Jain Global Long/Short Quant | Sold Out | -6.0K | -100.0% | $11.9M | 0.0% | 56 |
| Hudson Bay Capital Management Event | New | +3.5K | — | $6.9M | 0.0% | 55 |
Most significant buyers
By move score, not size.
- COATUE MANAGEMENT LLC
- Balyasny Asset Management L.P.
- Hudson Bay Capital Management
- Qube Research & Technologies Ltd
- CITADEL ADVISORS LLC
Most significant sellers
By move score, not size.
- Castle Hook Partners
- MARSHALL WACE, LLP
- Capital Fund Management
- Voloridge Investment Management
- Quadrature Capital
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Castle Hook Partners | 1 | 98.5K | 208.9K | -110.4K | -52.9% | 2.1% | Reduced | 74 |
| COATUE MANAGEMENT LLC | 1 | 17.8K | 0 | +17.8K | — | 0.1% | New | 65 |
| MARSHALL WACE, LLP | 2 | 0 | 2.1K | -2.1K | -100.0% | 0.0% | Sold Out | 58 |
| Balyasny Asset Management L.P. | 2 | 40.8K | 5.9K | +34.8K | +587.8% | 0.2% | Increased | 58 |
| Capital Fund Management | 3 | 0 | 16.4K | -16.4K | -100.0% | 0.0% | Sold Out | 58 |
| Voloridge Investment Management | 2 | 0 | 5.2K | -5.2K | -100.0% | 0.0% | Sold Out | 58 |
| Quadrature Capital | 3 | 0 | 5.3K | -5.3K | -100.0% | 0.0% | Sold Out | 57 |
| Squarepoint Ops LLC | 2 | 2.5K | 66.7K | -64.2K | -96.2% | 0.0% | Reduced | 57 |
| Jain Global | 3 | 0 | 6.0K | -6.0K | -100.0% | 0.0% | Sold Out | 56 |
| Hudson Bay Capital Management | 3 | 3.5K | 0 | +3.5K | — | 0.0% | New | 55 |
| Qube Research & Technologies Ltd | 2 | 29.4K | 2.0K | +27.4K | +1359.0% | 0.1% | Increased | 55 |
| Armistice Capital | 3 | 0 | 2.4K | -2.4K | -100.0% | 0.0% | Sold Out | 55 |
| CITADEL ADVISORS LLC | 1 | 46.9K | 24.3K | +22.6K | +92.9% | 0.1% | Increased | 54 |
| Aquatic Capital Management | 4 | 0 | 7.9K | -7.9K | -100.0% | 0.0% | Sold Out | 54 |
| Alyeska Investment Group, L.P. | 2 | 293 | 11.8K | -11.5K | -97.5% | 0.0% | Reduced | 54 |
| Voleon Capital Management | 3 | 691 | 0 | +691 | — | 0.0% | New | 53 |
| Merewether Investment Management | 2 | 36.7K | 22.4K | +14.3K | +64.0% | 1.4% | Increased | 53 |
| LMR Partners | 3 | 405 | 0 | +405 | — | 0.0% | New | 53 |
| Parallax Volatility Advisers | 3 | 610 | 0 | +610 | — | 0.1% | New | 52 |
| Tudor Investment Corporation | 2 | 7.1K | 193 | +6.9K | +3582.9% | 0.1% | Increased | 52 |
| MILLENNIUM MANAGEMENT LLC | 2 | 36.4K | 103.3K | -66.9K | -64.7% | 0.1% | Reduced | 51 |
| Y-Intercept | 4 | 0 | 1.8K | -1.8K | -100.0% | 0.0% | Sold Out | 50 |
| Bridgewater Associates | 1 | 48.5K | 86.5K | -38.0K | -43.9% | 0.5% | Reduced | 50 |
| Cinctive Capital Management | 3 | 361 | 0 | +361 | — | 0.0% | New | 50 |
| Caxton Associates | 3 | 1.6K | 151 | +1.4K | +946.4% | 0.1% | Increased | 49 |
| Capstone Investment Advisors | 3 | 1.3K | 374 | +926 | +247.6% | 0.0% | Increased | 49 |
| Holocene Advisors, LP | 2 | 6.6K | 26.7K | -20.1K | -75.4% | 0.0% | Reduced | 48 |
| CenterBook Partners | 4 | 3.1K | 830 | +2.2K | +268.8% | 0.3% | Increased | 46 |
| Graham Capital Management | 3 | 3.6K | 1.9K | +1.7K | +89.2% | 0.3% | Increased | 44 |
| Brevan Howard Capital Management | 3 | 155 | 1.6K | -1.5K | -90.6% | 0.0% | Reduced | 43 |
| Point72 Asset Management, L.P. | 1 | 179.7K | 219.2K | -39.5K | -18.0% | 0.6% | Reduced | 42 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 76.2K | 56.7K | +19.5K | +34.4% | 0.2% | Increased | 41 |
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 24.0K | 16.8K | +7.2K | +42.6% | 0.2% | Increased | 40 |
| Alphadyne Asset Management | 3 | 5 | 25 | -20 | -80.0% | 0.0% | Reduced | 40 |
| Lighthouse Investment Partners | 3 | 3.0K | 7.6K | -4.6K | -60.5% | 0.2% | Reduced | 39 |
| Moore Capital Management | 3 | 9.1K | 5.9K | +3.1K | +52.4% | 0.5% | Increased | 39 |
| Schonfeld Strategic Advisors | 3 | 8.3K | 16.6K | -8.3K | -50.2% | 0.1% | Reduced | 38 |
| Engineers Gate | 4 | 2.2K | 7.0K | -4.8K | -68.5% | 0.1% | Reduced | 37 |
| Edgestream Partners | 4 | 1.9K | 4.9K | -3.1K | -61.8% | 0.1% | Reduced | 36 |
| AQR Capital Management | 3 | 1.1M | 1.1M | -57.2K | -5.1% | 0.7% | Reduced | 33 |
| TWO SIGMA INVESTMENTS, LP | 2 | 6.7K | 8.4K | -1.7K | -19.7% | 0.0% | Reduced | 33 |
| D. E. Shaw & Co., Inc. | 1 | 67.1K | 67.8K | -653 | -1.0% | 0.1% | Reduced | 29 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 31.3K | 28.6K | +2.7K | +9.5% | 0.1% | Increased | 29 |
| Chilton Investment Company | 2 | 191 | 247 | -56 | -22.7% | 0.0% | Reduced | 29 |
| Verition Fund Management | 2 | 8.2K | 9.6K | -1.4K | -14.1% | 0.2% | Reduced | 29 |
| Woodline Partners LP | 2 | 7.7K | 6.9K | +776 | +11.3% | 0.0% | Increased | 28 |
| Gotham Asset Management, LLC | 2 | 46.1K | 48.8K | -2.7K | -5.6% | 0.2% | Reduced | 28 |
| Boothbay Fund Management | 4 | 691 | 1.2K | -459 | -39.9% | 0.0% | Reduced | 28 |
| Walleye Capital | 3 | 7.4K | 8.5K | -1.1K | -12.7% | 0.1% | Reduced | 26 |
| Man Group | 3 | 54.0K | 57.8K | -3.9K | -6.7% | 0.2% | Reduced | 26 |
| Trexquant Investment | 3 | 12.0K | 12.7K | -704 | -5.6% | 0.1% | Reduced | 24 |
| Quantbot Technologies | 4 | 1.1K | 1.5K | -431 | -28.8% | 0.1% | Reduced | 22 |
Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeHedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.