BRK.B Berkshire Hathaway, Inc.
Berkshire Hathaway, Inc. (BRK.B) 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 |
|---|---|---|---|---|---|---|
| Prana Capital Management Long/Short | New | +136.6K | — | $68.4M | 2.1% | 69 |
| D. E. Shaw & Co., Inc. Quant | Increased | +1.45M | +310.2% | $726.7M | 0.6% | 67 |
| Himalaya Capital Management Value | Increased | +210.6K | +23.5% | $105.4M | 15.0% | 66 |
| Quadrature Capital Quant | Increased | +382.1K | +799.5% | $191.2M | 2.2% | 65 |
| HBK Investments Event | Sold Out | -10.9K | -100.0% | $5.4M | 0.0% | 62 |
| Qube Research & Technologies Ltd Quant | Increased | +510.4K | +188.0% | $255.4M | 0.4% | 61 |
| Weiss Asset Management Event Quant | New | +58.6K | — | $29.3M | 0.5% | 60 |
| Jain Global Long/Short Quant | Sold Out | -91.2K | -100.0% | $45.6M | 0.0% | 59 |
| Capstone Investment Advisors Quant Macro | Increased | +170.3K | +628.1% | $85.2M | 1.2% | 59 |
| ExodusPoint Capital Management Long/Short Quant | New | +79.5K | — | $39.8M | 0.4% | 58 |
Most significant buyers
By move score, not size.
- Prana Capital Management
- D. E. Shaw & Co., Inc.
- Himalaya Capital Management
- Quadrature Capital
- Qube Research & Technologies Ltd
Most significant sellers
By move score, not size.
- HBK Investments
- Jain Global
- MKP Capital Management
- Capula Management
- Engineers Gate
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Prana Capital Management | 3 | 136.6K | 0 | +136.6K | — | 2.1% | New | 69 |
| D. E. Shaw & Co., Inc. | 1 | 1.9M | 468.2K | +1.45M | +310.2% | 0.6% | Increased | 67 |
| Himalaya Capital Management | 1 | 1.1M | 897.7K | +210.6K | +23.5% | 15.0% | Increased | 66 |
| Quadrature Capital | 3 | 429.9K | 47.8K | +382.1K | +799.5% | 2.2% | Increased | 65 |
| HBK Investments | 1 | 0 | 10.9K | -10.9K | -100.0% | 0.0% | Sold Out | 62 |
| Qube Research & Technologies Ltd | 2 | 782.0K | 271.5K | +510.4K | +188.0% | 0.4% | Increased | 61 |
| Weiss Asset Management | 2 | 58.6K | 0 | +58.6K | — | 0.5% | New | 60 |
| Jain Global | 3 | 0 | 91.2K | -91.2K | -100.0% | 0.0% | Sold Out | 59 |
| Capstone Investment Advisors | 3 | 197.4K | 27.1K | +170.3K | +628.1% | 1.2% | Increased | 59 |
| ExodusPoint Capital Management | 3 | 79.5K | 0 | +79.5K | — | 0.4% | New | 58 |
| MKP Capital Management | 2 | 405.5K | 430.1K | -24.6K | -5.7% | 17.3% | Reduced | 57 |
| Aquatic Capital Management | 4 | 21.8K | 0 | +21.8K | — | 0.4% | New | 54 |
| Graham Capital Management | 3 | 17.6K | 0 | +17.6K | — | 0.4% | New | 53 |
| Man Group | 3 | 219.8K | 91.0K | +128.7K | +141.4% | 0.2% | Increased | 53 |
| Schonfeld Strategic Advisors | 3 | 97.2K | 438 | +96.8K | +22096.3% | 0.3% | Increased | 51 |
| Centiva Capital | 4 | 2.1K | 0 | +2.1K | — | 0.1% | New | 50 |
| TWO SIGMA INVESTMENTS, LP | 2 | 2.3M | 1.6M | +652.8K | +40.3% | 0.9% | Increased | 50 |
| Brevan Howard Capital Management | 3 | 53.6K | 17.5K | +36.0K | +205.9% | 0.5% | Increased | 50 |
| Caxton Associates | 3 | 4.2K | 493 | +3.7K | +745.6% | 0.0% | Increased | 49 |
| LMR Partners | 3 | 10.1K | 3.4K | +6.7K | +198.0% | 0.1% | Increased | 49 |
| Y-Intercept | 4 | 24.7K | 5.0K | +19.7K | +397.8% | 0.3% | Increased | 45 |
| Quantbot Technologies | 4 | 18.0K | 2.5K | +15.5K | +606.4% | 0.4% | Increased | 43 |
| AQR Capital Management | 3 | 2.4M | 1.6M | +737.7K | +44.9% | 0.4% | Increased | 43 |
| Hudson Bay Capital Management | 3 | 818.3K | 765.3K | +53.0K | +6.9% | 2.3% | Increased | 41 |
| Capula Management | 2 | 597 | 1.6K | -1.0K | -63.5% | 0.0% | Reduced | 40 |
| Voloridge Investment Management | 2 | 124.8K | 85.0K | +39.8K | +46.8% | 0.3% | Increased | 39 |
| Engineers Gate | 4 | 604 | 2.7K | -2.1K | -77.8% | 0.0% | Reduced | 38 |
| CITADEL ADVISORS LLC | 1 | 1.1M | 1.2M | -107.8K | -9.0% | 0.4% | Reduced | 37 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 1.6M | 1.7M | -62.7K | -3.7% | 1.2% | Reduced | 36 |
| Capital Fund Management | 3 | 221.2K | 266.5K | -45.3K | -17.0% | 0.8% | Reduced | 36 |
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 378.1K | 332.7K | +45.5K | +13.7% | 0.6% | Increased | 35 |
| MILLENNIUM MANAGEMENT LLC | 2 | 587.7K | 653.1K | -65.5K | -10.0% | 0.2% | Reduced | 34 |
| Parallax Volatility Advisers | 3 | 43.2K | 33.3K | +9.9K | +29.7% | 1.1% | Increased | 34 |
| Chilton Investment Company | 2 | 71.9K | 84.1K | -12.2K | -14.5% | 0.9% | Reduced | 34 |
| Tudor Investment Corporation | 2 | 101.3K | 126.9K | -25.6K | -20.2% | 0.2% | Reduced | 33 |
| Woodline Partners LP | 2 | 374.9K | 341.2K | +33.7K | +9.9% | 0.6% | Increased | 33 |
| MARSHALL WACE, LLP | 2 | 390.2K | 422.7K | -32.5K | -7.7% | 0.2% | Reduced | 32 |
| Voleon Capital Management | 3 | 61.1K | 79.2K | -18.1K | -22.9% | 0.6% | Reduced | 32 |
| Interval Partners | 3 | 13.0K | 17.6K | -4.6K | -26.1% | 0.2% | Reduced | 32 |
| Balyasny Asset Management L.P. | 2 | 424.8K | 439.4K | -14.6K | -3.3% | 0.4% | Reduced | 31 |
| Verition Fund Management | 2 | 7.4K | 9.8K | -2.4K | -24.5% | 0.0% | Reduced | 31 |
| CenterBook Partners | 4 | 56.2K | 49.1K | +7.1K | +14.5% | 1.4% | Increased | 30 |
| Locust Wood Capital | 2 | 66.4K | 65.8K | +597 | +0.9% | 0.8% | Increased | 30 |
| Squarepoint Ops LLC | 2 | 591.3K | 586.0K | +5.3K | +0.9% | 0.7% | Increased | 29 |
| Boothbay Fund Management | 4 | 4.8K | 3.3K | +1.5K | +44.7% | 0.1% | Increased | 29 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 1.8K | 1.7K | +69 | +4.0% | 0.0% | Increased | 28 |
| Walleye Capital | 3 | 40.5K | 50.9K | -10.4K | -20.5% | 0.2% | Reduced | 28 |
| Trexquant Investment | 3 | 136.6K | 122.3K | +14.2K | +11.6% | 0.4% | Increased | 27 |
| Gotham Asset Management, LLC | 2 | 103.1K | 104.1K | -1.0K | -1.0% | 0.1% | Reduced | 24 |
| Edgestream Partners | 4 | 1.9K | 1.6K | +278 | +17.6% | 0.0% | Increased | 22 |
| Winton Group | 4 | 30.3K | 30.4K | -11 | -+0.0% | 0.5% | Reduced | 20 |
| Holocene Advisors, LP | 2 | 527.0K | 527.0K | 0 | +0.0% | 0.6% | Unchanged | 23 |
| Systematic Alpha Investments | 2 | 1.3K | 1.3K | 0 | +0.0% | 0.0% | Unchanged | 18 |
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.