HOWL Werewolf Therapeutics, Inc.
Werewolf Therapeutics, Inc. (HOWL) Institutional Ownership
What the institutions did with HOWL last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 2.4M | 22.0% |
| Balyasny Asset Management L.P. | 1.8M | 16.5% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.2M | 11.2% |
| RENAISSANCE TECHNOLOGIES LLC | 674.6K | 6.2% |
| Lynx1 Capital Management LP | 657.8K | 6.1% |
| SPHERA FUNDS MANAGEMENT LTD. | 626.8K | 5.8% |
| DC Funds, LP | 589.1K | 5.4% |
| Verdad Advisers, LP | 348.7K | 3.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 335.8K | 3.1% |
| BANK OF AMERICA CORP /DE/ | 311.5K | 2.9% |
| XTX Topco Ltd | 271.5K | 2.5% |
| JANE STREET GROUP, LLC | 251.8K | 2.3% |
| UBS Group AG | 215.8K | 2.0% |
| VANGUARD FIDUCIARY TRUST CO | 157.7K | 1.5% |
| STATE STREET CORP | 119.2K | 1.1% |
| Squarepoint Ops LLC | 103.2K | 1.0% |
| BlackRock, Inc. | 101.6K | 0.9% |
| Rangeley Capital, LLC | 100.0K | 0.9% |
| NORTHERN TRUST CORP | 86.9K | 0.8% |
| Alyeska Investment Group, L.P. | 86.6K | 0.8% |
| MPM BIOIMPACT LLC | 80.1K | 0.7% |
| MILLENNIUM MANAGEMENT LLC | 62.1K | 0.6% |
| Virtu Financial LLC | 45.5K | 0.4% |
| TWO SIGMA INVESTMENTS, LP | 27.3K | 0.3% |
| GSA CAPITAL PARTNERS LLP | 27.1K | 0.2% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | Reduced | 6.7M | 2.4M | -4.3M |
| Balyasny Asset Management L.P. | New | 0 | 1.8M | +1.8M |
| MPM BIOIMPACT LLC | Reduced | 1.2M | 80.1K | -1.1M |
| Squadron Capital Management LLC | Sold Out | 563.5K | 0 | -563.5K |
| Verdad Advisers, LP | Increased | 29.8K | 348.7K | +318.9K |
| XTX Topco Ltd | Increased | 50.9K | 271.5K | +220.5K |
| JANE STREET GROUP, LLC | Increased | 82.8K | 251.8K | +169.0K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 516.2K | 674.6K | +158.4K |
| UBS Group AG | Increased | 66.9K | 215.8K | +149.0K |
| Squarepoint Ops LLC | New | 0 | 103.2K | +103.2K |
| Rangeley Capital, LLC | New | 0 | 100.0K | +100.0K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Sold Out | 77.0K | 0 | -77.0K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 132.1K | 62.1K | -70.0K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 389.5K | 335.8K | -53.7K |
| BANK OF AMERICA CORP /DE/ | Increased | 264.6K | 311.5K | +46.9K |
| Virtu Financial LLC | New | 0 | 45.5K | +45.5K |
| SIMPLEX TRADING, LLC | Reduced | 32.5K | 255 | -32.3K |
| TWO SIGMA INVESTMENTS, LP | New | 0 | 27.3K | +27.3K |
| GSA CAPITAL PARTNERS LLP | New | 0 | 27.1K | +27.1K |
| StoneX Group Inc. | New | 0 | 20.0K | +20.0K |
| RAYMOND JAMES FINANCIAL INC | Sold Out | 19.8K | 0 | -19.8K |
| GOLDMAN SACHS GROUP INC | Reduced | 38.3K | 20.0K | -18.2K |
| HRT FINANCIAL LP | Sold Out | 17.9K | 0 | -17.9K |
| Delta Investment Management, LLC | Sold Out | 14.9K | 0 | -14.9K |
| MORGAN STANLEY | Reduced | 33.8K | 19.1K | -14.7K |
| Marest Capital, LLC | New | 0 | 10.9K | +10.9K |
| CITADEL ADVISORS LLC | Sold Out | 10.4K | 0 | -10.4K |
| Vanguard Global Advisers, LLC | Sold Out | 10.3K | 0 | -10.3K |
| Tower Research Capital LLC (TRC) | New | 0 | 9.9K | +9.9K |
| TFC Financial Management, Inc. | Sold Out | 4.5K | 0 | -4.5K |
| CITIGROUP INC | Sold Out | 3.4K | 0 | -3.4K |
| LPL Financial LLC | Increased | 10.0K | 11.8K | +1.8K |
| Ranch Capital Advisors Inc. | Reduced | 12.0K | 11.0K | -1.0K |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | Sold Out | 200 | 0 | -200 |
| FMR LLC | Sold Out | 39 | 0 | -39 |
| BlackRock, Inc. | Reduced | 101.6K | 101.6K | -35 |
| SBI Securities Co., Ltd. | Increased | 80 | 100 | +20 |
| JPMORGAN CHASE & CO | Increased | 2.1K | 2.1K | +12 |
| Arax Advisory Partners | Sold Out | 12 | 0 | -12 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.