Werewolf TherapeuticsHOWL
13F holders, Q3 2025 (September 30)62holders −3
8new positions
10sold out
4famous investors
$1.97avg. 13F price*
At the end of Q3 2025, 62 institutions reported holding Werewolf Therapeutics Inc. (HOWL) in their 13F filings, down 3 from Q2 2025. 8 opened new positions and 10 sold out. The largest holders were Ra Capital Management, L.P. ($13.2M), MPM Asset Management LLC ($8.5M) and MPM Bioimpact LLC ($4.7M). 4 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Werewolf Therapeutics Inc.
- CUSIP
- 95075A107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 8 | $446K |
| Exits | 10 | $300K |
All 13F filers, Q2 2025 → Q3 2025: 520,107 shares bought and 1,716,200 shares sold, net −1,196,093 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 62 holders
| Ra Capital Management, L.P. | 0.16% | No change | 6,681,307 | $13.2M |
| MPM Asset Management LLC | 19.08% | No change | 4,309,860 | $8.5M |
| MPM Bioimpact LLC | 0.78% | No change | 2,408,810 | $4.7M |
| Bank of America Corp. | 0.00% | Reduce -14.0% | 1,830,292 | $3.6M |
| Vanguard Group Inc. | 0.00% | Add +8.5% | 1,408,047 | $2.8M |
| Sphera Funds Management LTD. | 0.29% | No change | 626,810 | $1.2M |
| DC Funds, LP | 37.32% | No change | 589,102 | $1.2M |
| Renaissance Technologies | 0.00% | Add +44.2% | 456,000 | $898K |
| PFM Health Sciences, LP | 0.07% | No change | 401,110 | $790K |
| Geode Capital Management, LLC | 0.00% | Add +0.9% | 330,787 | $652K |
| Millennium Management | 0.00% | Reduce -54.5% | 317,053 | $625K |
| Jane Street Group, LLC | 0.00% | Reduce -28.4% | 268,577 | $529K |
| Alyeska Investment Group, L.P. | 0.00% | No change | 235,705 | $464K |
| Citadel Advisors | 0.00% | New | 154,534 | $304K |
| State Street Corp. | 0.00% | No change | 119,168 | $235K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 102,000 | $201K |
| BlackRock, Inc. | 0.00% | Reduce -72.0% | 101,323 | $200K |
| Susquehanna International Group, LLP | 0.00% | Add +16.9% | 93,041 | $183K |
| Northern Trust Corp. | 0.00% | No change | 65,836 | $130K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -73.5% | 60,341 | $119K |
| Edgewood Management LLC | 0.00% | No change | 50,000 | $99K |
| Cubist Systematic Strategies, LLC | 0.00% | New | 46,711 | $92K |
| HRT Financial LP | 0.00% | Reduce -6.2% | 39,859 | $78K |
| Vontobel Holding Ltd. | 0.00% | Reduce -10.0% | 36,000 | $71K |
| Two Sigma Advisers, LP | 0.00% | Reduce -38.9% | 34,600 | $68K |
| Acadian Asset Management LLC | 0.00% | Reduce -44.0% | 34,285 | $67K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -33.9% | 29,250 | $58K |
| Regal Investment Advisors LLC | 0.00% | No change | 27,204 | $54K |
| Two Sigma Investments, LP | 0.00% | Reduce -55.7% | 20,139 | $40K |
| Morgan Stanley | 0.00% | Reduce -29.2% | 19,252 | $38K |
| AQR Capital Management | 0.00% | Reduce -80.7% | 17,807 | $35K |
| Simplex Trading, LLC | 0.00% | Add +123.4% | 15,636 | $30K |
| Certuity, LLC | 0.00% | No change | 15,000 | $30K |
| Raymond James Financial Inc. | 0.00% | Add +10.7% | 14,436 | $28K |
| Barclays PLC | 0.00% | Add +0.3% | 13,275 | $26K |
| Point72 Asia (Singapore) Pte. Ltd. | 0.00% | Reduce -35.3% | 13,016 | $26K |
| UBS Group AG | 0.00% | Add +271.6% | 12,776 | $25K |
| Virtu Financial LLC | 0.00% | New | 12,230 | $24K |
| HBK Sorce Advisory LLC | 0.00% | No change | 13,227 | $23K |
| FMR LLC | 0.00% | No change | 11,284 | $22K |
| Cetera Investment Advisers | 0.00% | New | 10,200 | $20K |
| Larson Financial Group LLC | 0.00% | No change | 10,000 | $20K |
| Citigroup Inc. | 0.00% | Add +2598.1% | 8,661 | $17K |
| Osaic Holdings, Inc. | 0.00% | No change | 9,625 | $13K |
| Financial Perspectives, Inc | 0.00% | No change | 6,750 | $13K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -58.2% | 6,004 | $12K |
| Highline Wealth Partners LLC | 0.00% | Reduce -50.0% | 5,000 | $10K |
| Federated Hermes, Inc. | 0.00% | No change | 4,387 | $9K |
| Group One Trading LLC | 0.00% | New | 2,671 | $5K |
| TFC Financial Management, Inc. | 0.00% | No change | 2,500 | $5K |
| Cwm, LLC | 0.00% | Reduce -81.4% | 1,569 | $3K |
| Nisa Investment Advisors, LLC | 0.00% | No change | 1,375 | $3K |
| JPMorgan Chase & Co. | 0.00% | Reduce -89.7% | 1,123 | $2K |
| Rossby Financial, LCC | 0.00% | No change | 860 | $2K |
| BNP Paribas Financial Markets | 0.00% | Reduce -78.0% | 793 | $2K |
| Royal Bank of Canada | 0.00% | Reduce -92.4% | 806 | $1K |
| Advisory Services Network, LLC | 0.00% | New | 157 | $309 |
| Arax Advisory Partners | 0.00% | New | 68 | $133 |
| Plante Moran Financial Advisors, LLC | 0.00% | No change | 50 | $99 |
| SBI Securities Co., Ltd. | 0.00% | Add +2.5% | 41 | $81 |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -79.0% | 35 | $69 |
| Optiver Holding B.V. | 0.00% | New | 22 | $43 |
"% of holder's portfolio" is HOWL's weight in each manager's 13F, not the share of Werewolf Therapeutics Inc. the manager owns.