59 institutions reported holding $11.7M of WEREWOLF THERAPEUTICS INC (HOWL) in SEC 13F filings for 2026-03-31. Largest institutional holders: RA CAPITAL MANAGEMENT, L.P. ($5.6M), VANGUARD CAPITAL MANAGEMENT LLC ($1.0M), MPM BIOIMPACT LLC ($1.0M), Lynx1 Capital Management LP ($547,673), SPHERA FUNDS MANAGEMENT LTD. ($521,882). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | $5.6M | 6.7M | Hold |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | $1.0M | 1.2M | New |
| 3 | MPM BIOIMPACT LLC | $1.0M | 1.2M | Trimmed |
| 4 | Lynx1 Capital Management LP | $547,673 | 657,786 | Added |
| 5 | SPHERA FUNDS MANAGEMENT LTD. | $521,882 | 626,810 | Hold |
| 6 | DC Funds, LP | $490,486 | 589,102 | Hold |
| 7 | Squadron Capital Management LLC | $469,199 | 563,535 | New |
| 8 | RENAISSANCE TECHNOLOGIES LLC | $429,803 | 516,218 | Trimmed |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | $324,363 | 389,487 | Added |
| 10 | BANK OF AMERICA CORP /DE/ | $220,133 | 264,583 | Trimmed |
| 11 | VANGUARD FIDUCIARY TRUST CO | $131,386 | 157,726 | New |
| 12 | MILLENNIUM MANAGEMENT LLC | $109,945 | 132,050 | Trimmed |
| 13 | STATE STREET CORP | $99,219 | 119,168 | Hold |
| 14 | BlackRock, Inc. | $84,598 | 101,608 | Trimmed |
| 15 | NORTHERN TRUST CORP | $72,312 | 86,851 | Hold |
| 16 | Alyeska Investment Group, L.P. | $72,065 | 86,554 | Trimmed |
| 17 | JANE STREET GROUP, LLC | $68,969 | 82,836 | Trimmed |
| 18 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $64,110 | 77,000 | Hold |
| 19 | UBS Group AG | $55,692 | 66,857 | Added |
| 20 | XTX Topco Ltd | $42,403 | 50,929 | New |
| 21 | GOLDMAN SACHS GROUP INC | $31,860 | 38,266 | Added |
| 22 | MORGAN STANLEY | $28,141 | 33,799 | Trimmed |
| 23 | SIMPLEX TRADING, LLC | $27,094 | 32,526 | Added |
| 24 | Verdad Advisers, LP | $24,778 | 29,760 | New |
| 25 | RAYMOND JAMES FINANCIAL INC | $16,467 | 19,778 | New |
Source: SEC Form 13F filings · as of 2026-03-31