BLK BlackRock, Inc.
BlackRock, Inc. (BLK) 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 |
|---|---|---|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC Quant | New | +118.7K | — | $114.2M | 0.2% | 67 |
| ValueAct Capital Activist Value | Increased | +35.6K | +6.5% | $34.2M | 9.9% | 66 |
| MARSHALL WACE, LLP Long/Short | New | +128.1K | — | $123.1M | 0.1% | 65 |
| Bridgewater Associates Quant Macro | New | +4.7K | — | $4.5M | 0.0% | 63 |
| Point72 Asset Management, L.P. | Increased | +126.3K | +237.7% | $121.5M | 0.3% | 63 |
| TWO SIGMA INVESTMENTS, LP Quant | Increased | +292.3K | +151.4% | $281.1M | 0.4% | 63 |
| Samlyn Capital Long/Short | Increased | +56.6K | +37.1% | $54.5M | 3.3% | 59 |
| Tudor Investment Corporation Macro | New | +17.0K | — | $16.3M | 0.1% | 58 |
| Capital Fund Management Quant Macro | Sold Out | -11.4K | -100.0% | $10.9M | 0.0% | 57 |
| Wolverine Asset Management Event Quant | New | +1.5K | — | $1.4M | 0.1% | 56 |
Most significant buyers
By move score, not size.
- RENAISSANCE TECHNOLOGIES LLC
- ValueAct Capital
- MARSHALL WACE, LLP
- Bridgewater Associates
- Point72 Asset Management, L.P.
Most significant sellers
By move score, not size.
- Capital Fund Management
- Alyeska Investment Group, L.P.
- Caxton Associates
- Prana Capital Management
- ExodusPoint Capital Management
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | 1 | 118.7K | 0 | +118.7K | — | 0.2% | New | 67 |
| ValueAct Capital | 1 | 581.7K | 546.1K | +35.6K | +6.5% | 9.9% | Increased | 66 |
| MARSHALL WACE, LLP | 2 | 128.1K | 0 | +128.1K | — | 0.1% | New | 65 |
| Bridgewater Associates | 1 | 4.7K | 0 | +4.7K | — | 0.0% | New | 63 |
| Point72 Asset Management, L.P. | 1 | 179.5K | 53.2K | +126.3K | +237.7% | 0.3% | Increased | 63 |
| TWO SIGMA INVESTMENTS, LP | 2 | 485.3K | 193.0K | +292.3K | +151.4% | 0.4% | Increased | 63 |
| Samlyn Capital | 2 | 209.2K | 152.6K | +56.6K | +37.1% | 3.3% | Increased | 59 |
| Tudor Investment Corporation | 2 | 17.0K | 0 | +17.0K | — | 0.1% | New | 58 |
| Capital Fund Management | 3 | 0 | 11.4K | -11.4K | -100.0% | 0.0% | Sold Out | 57 |
| Wolverine Asset Management | 2 | 1.5K | 0 | +1.5K | — | 0.1% | New | 56 |
| Rokos Capital Management | 2 | 430 | 0 | +430 | — | 0.0% | New | 56 |
| Qube Research & Technologies Ltd | 2 | 133.7K | 63.7K | +70.0K | +109.8% | 0.1% | Increased | 56 |
| Hudson Bay Capital Management | 3 | 77.7K | 15.8K | +61.9K | +391.8% | 0.4% | Increased | 55 |
| Alyeska Investment Group, L.P. | 2 | 607 | 50.2K | -49.6K | -98.8% | 0.0% | Reduced | 54 |
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 26.9K | 6.2K | +20.7K | +333.5% | 0.1% | Increased | 54 |
| CITADEL ADVISORS LLC | 1 | 1.1M | 703.1K | +394.1K | +56.0% | 0.7% | Increased | 54 |
| Jain Global | 3 | 5.9K | 0 | +5.9K | — | 0.1% | New | 54 |
| Caxton Associates | 3 | 0 | 241 | -241 | -100.0% | 0.0% | Sold Out | 53 |
| Prana Capital Management | 3 | 225.7K | 243.1K | -17.4K | -7.1% | 6.6% | Reduced | 53 |
| J. Goldman & Co. | 3 | 1.1K | 0 | +1.1K | — | 0.0% | New | 52 |
| ExodusPoint Capital Management | 3 | 0 | 976 | -976 | -100.0% | 0.0% | Sold Out | 52 |
| Balyasny Asset Management L.P. | 2 | 335.0K | 210.3K | +124.7K | +59.3% | 0.6% | Increased | 52 |
| Cinctive Capital Management | 3 | 1.5K | 0 | +1.5K | — | 0.1% | New | 52 |
| Centiva Capital | 4 | 1.4K | 0 | +1.4K | — | 0.1% | New | 50 |
| Man Group | 3 | 60.4K | 13.5K | +46.9K | +346.8% | 0.1% | Increased | 50 |
| Junto Capital Management | 2 | 141.9K | 161.1K | -19.2K | -11.9% | 2.6% | Reduced | 50 |
| Schonfeld Strategic Advisors | 3 | 35.2K | 5.5K | +29.7K | +542.0% | 0.2% | Increased | 50 |
| Trexquant Investment | 3 | 32.5K | 15.0K | +17.5K | +116.1% | 0.2% | Increased | 50 |
| Holocene Advisors, LP | 2 | 6.1K | 31.4K | -25.3K | -80.5% | 0.0% | Reduced | 49 |
| Capula Management | 2 | 18 | 313 | -295 | -94.2% | 0.0% | Reduced | 48 |
| Walleye Capital | 3 | 6.9K | 293 | +6.6K | +2268.9% | 0.1% | Increased | 47 |
| LMR Partners | 3 | 798 | 226 | +572 | +253.1% | 0.0% | Increased | 47 |
| Readystate Asset Management | 3 | 210 | 2.4K | -2.2K | -91.4% | 0.0% | Reduced | 45 |
| Quantbot Technologies | 4 | 14.1K | 5.2K | +8.9K | +170.8% | 0.5% | Increased | 44 |
| MILLENNIUM MANAGEMENT LLC | 2 | 495.3K | 641.6K | -146.3K | -22.8% | 0.4% | Reduced | 43 |
| Woodline Partners LP | 2 | 90.1K | 57.3K | +32.8K | +57.2% | 0.3% | Increased | 43 |
| Capstone Investment Advisors | 3 | 3.2K | 1.8K | +1.4K | +73.6% | 0.0% | Increased | 42 |
| Voloridge Investment Management | 2 | 110.1K | 72.9K | +37.3K | +51.2% | 0.5% | Increased | 41 |
| Brevan Howard Capital Management | 3 | 869 | 4.8K | -3.9K | -81.8% | 0.0% | Reduced | 41 |
| AQR Capital Management | 3 | 657.3K | 440.2K | +217.1K | +49.3% | 0.2% | Increased | 41 |
| Voleon Capital Management | 3 | 34.9K | 23.2K | +11.6K | +50.1% | 0.6% | Increased | 39 |
| Verition Fund Management | 2 | 1.1K | 2.4K | -1.3K | -55.5% | 0.0% | Reduced | 39 |
| Edgestream Partners | 4 | 275 | 1.3K | -988 | -78.2% | 0.0% | Reduced | 38 |
| D. E. Shaw & Co., Inc. | 1 | 126.1K | 146.9K | -20.8K | -14.2% | 0.1% | Reduced | 35 |
| Basswood Capital Management | 3 | 24.0K | 20.9K | +3.1K | +14.9% | 1.0% | Increased | 32 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 120.7K | 111.0K | +9.7K | +8.8% | 0.2% | Increased | 30 |
| Quadrature Capital | 3 | 47.8K | 52.7K | -4.9K | -9.3% | 0.5% | Reduced | 29 |
| Squarepoint Ops LLC | 2 | 66.7K | 73.5K | -6.8K | -9.2% | 0.1% | Reduced | 29 |
| Engineers Gate | 4 | 8.4K | 6.3K | +2.2K | +34.6% | 0.1% | Increased | 28 |
| Chilton Investment Company | 2 | 4.0K | 4.7K | -685 | -14.7% | 0.1% | Reduced | 28 |
| Y-Intercept | 4 | 11.1K | 9.5K | +1.6K | +17.1% | 0.2% | Increased | 25 |
| Gotham Asset Management, LLC | 2 | 20.0K | 20.3K | -246 | -1.2% | 0.0% | Reduced | 24 |
| Boothbay Fund Management | 4 | 1.1K | 935 | +120 | +12.8% | 0.0% | Increased | 21 |
| Winton Group | 4 | 520 | 588 | -68 | -11.6% | 0.0% | Reduced | 20 |
| Quinn Opportunity Partners | 4 | 2.0K | 2.0K | 0 | +0.0% | 0.1% | Unchanged | 13 |
| Systematic Alpha Investments | 2 | 230 | 230 | 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.