HOWL · Company research
Werewolf Therapeutics, Inc. Common Stock (HOWL): Ownership & Institutional Holders
Reported institutional positions. Filing dates and sources matter.
RESEARCH CONTEXT
Understand the numbers
Reported institutional positions. Filing dates and sources matter. Use period, currency, units and source fields when interpreting values.
67records availableHealthcare
Ownership & Institutional Holders data
Database-backed records only
| holder name | cik | period end | shares held | market value | ownership percent | shares change | shares change percent | filing date | data source |
|---|---|---|---|---|---|---|---|---|---|
| SIMPLEX TRADING, LLC | 1488542 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1100 | 395 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| UBS Group AG | 1610520 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 215736 | 77665 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| StoneX Group Inc. | 913760 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 20000 | 9000 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Rangeley Capital, LLC | 1517796 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 100000 | 35990 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| SBI Securities Co., Ltd. | 1851815 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 100 | 36 | — | — | — | Jul 23, 2026 | SEC_13F_DATASET |
| DC Funds, LP | 1869028 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 589102 | 212018 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| MPM BIOIMPACT LLC | 1687078 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 80142 | 28851 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Alyeska Investment Group, L.P. | 1453072 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 86554 | 31151 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Cetera Investment Advisers | 1666741 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10200 | 3671 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| BlackRock, Inc. | 2012383 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 71700 | 25805 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| Lynx1 Capital Management LP | 1910456 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 657786 | 236737 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| STATE STREET CORP | 93751 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 119168 | 42889 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| OSAIC HOLDINGS, INC. | 1677044 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 50 | 18 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Squarepoint Ops LLC | 1642575 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 103242 | 37157 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| XTX Topco Ltd | 1828301 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 271478 | 97705 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| CERTUITY, LLC | 1800752 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 15000 | 5399 | — | — | — | Jul 28, 2026 | SEC_13F_DATASET |
| GSA CAPITAL PARTNERS LLP | 1362033 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 27146 | 10 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| CITADEL ADVISORS LLC | 1423053 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 75000 | 26993 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Marest Capital, LLC | 2010315 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10870 | 3912 | — | — | — | Aug 5, 2026 | SEC_13F_DATASET |
| MILLENNIUM MANAGEMENT LLC | 1273087 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 62055 | 22334 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| VANGUARD FIDUCIARY TRUST CO | 933478 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 157726 | 56781 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| LPL Financial LLC | 1403438 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 11791 | 4244 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| BNP PARIBAS FINANCIAL MARKETS | 1166588 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 790 | 284 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| NORTHERN TRUST CORP | 73124 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 86851 | 31258 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| TWO SIGMA INVESTMENTS, LP | 1179392 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 27300 | 9825 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Larson Financial Group LLC | 1731061 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 13052 | 4697 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| HBK Sorce Advisory LLC | 1379995 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 13227 | 5317 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| JPMORGAN CHASE & CO | 19617 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1177 | 363 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| BARCLAYS PLC | 312069 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 13235 | 4763 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Verdad Advisers, LP | 1812822 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 348709 | 125500 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Virtu Financial LLC | 1533964 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 45467 | 16 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| GROUP ONE TRADING LLC | 932540 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1871 | 673 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| GEODE CAPITAL MANAGEMENT, LLC | 1214717 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 62051 | 22332 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| JANE STREET GROUP, LLC | 1595888 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 146573 | 52752 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| RENAISSANCE TECHNOLOGIES LLC | 1037389 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 674632 | 242800 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Optiver Holding B.V. | 1859606 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 22 | 8 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1217976 | 438471 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| State Street Corporation | 93751 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 119168 | 42889000 | — | — | — | Sep 22, 2026 | SEC_13F_HR |
| Goldman Sachs Group Inc. | 886982 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 20023 | 7206000 | — | — | — | Aug 14, 2026 | SEC_13F_HR |
| MORGAN STANLEY | 895421 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 17223 | 6199 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Northern Trust Corp | 73124 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 86851 | 31258000 | — | — | — | Aug 13, 2026 | SEC_13F_HR |
| Blackrock, Inc. | 2012383 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 29623 | 10661000 | — | — | — | Aug 7, 2026 | SEC_13F_HR |
| Tower Research Capital LLC (TRC) | 1533421 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 9897 | 3562 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Ranch Capital Advisors Inc. | 1793269 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 11000 | 3959 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| Financial Perspectives, Inc | 2003287 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 6750 | 2429 | — | — | — | Jul 24, 2026 | SEC_13F_DATASET |
| GOLDMAN SACHS GROUP INC | 886982 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 20023 | 7206 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| SPHERA FUNDS MANAGEMENT LTD. | 1496201 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 626810 | 225589 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Balyasny Asset Management L.P. | 1218710 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1790089 | 644253 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| RA CAPITAL MANAGEMENT, L.P. | 1346824 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2387744 | 859349 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| BANK OF AMERICA CORP /DE/ | 70858 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 288296 | 103498 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Optiver Holding B.V. | 1859606 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 22 | 18 | — | — | — | Jun 2, 2026 | SEC_13F_DATASET |
| Goldman Sachs Group Inc. | 886982 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 38266 | 31860000 | — | — | — | May 15, 2026 | SEC_13F_HR |
| State Street Corporation | 93751 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 119168 | 99219000 | — | — | — | May 15, 2026 | SEC_13F_HR |
| Northern Trust Corp | 73124 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 86851 | 72312000 | — | — | — | May 14, 2026 | SEC_13F_HR |
| Blackrock, Inc. | 2012383 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 29623 | 24664000 | — | — | — | May 13, 2026 | SEC_13F_HR |
| Citigroup Inc. | 831001 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3384 | 2818000 | — | — | — | May 11, 2026 | SEC_13F_HR |
| Northern Trust Corp | 73124 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 86851 | 55020000 | — | — | — | Feb 17, 2026 | SEC_13F_HR |
| State Street Corporation | 93751 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 119168 | 75493000 | — | — | — | Feb 13, 2026 | SEC_13F_HR |
| Citigroup Inc. | 831001 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 1 | 1000 | — | — | — | Feb 13, 2026 | SEC_13F_HR |
| StoneX Group Inc. | 913760 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 10511 | 6659000 | — | — | — | Feb 12, 2026 | SEC_13F_HR |
| Federated Hermes, Inc. | 1056288 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 4387 | 2779000 | — | — | — | Feb 12, 2026 | SEC_13F_HR |
| Blackrock, Inc. | 2012383 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 29623 | 18766000 | — | — | — | Feb 12, 2026 | SEC_13F_HR |
| Goldman Sachs Group Inc. | 886982 | Tue Sep 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 60341 | 118872000 | — | — | — | Nov 14, 2025 | SEC_13F_HR |
| State Street Corporation | 93751 | Tue Sep 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 119168 | 234761000 | — | — | — | Nov 14, 2025 | SEC_13F_HR |
| Blackrock, Inc. | 2012383 | Tue Sep 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 29623 | 58357000 | — | — | — | Nov 12, 2025 | SEC_13F_HR |
| Citigroup Inc. | 831001 | Tue Sep 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 320 | 630000 | — | — | — | Nov 10, 2025 | SEC_13F_HR |
| Jump Financial, LLC | 1831577 | Mon Jun 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 6842 | 7458 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
Informational research only, not financial advice. Forecasts are uncertain and can be wrong.