Werewolf TherapeuticsHOWL
13F holders, Q2 2026 (June 30)At the end of Q2 2026, 45 institutions reported holding Werewolf Therapeutics Inc. (HOWL) in their 13F filings, down 3 from Q1 2026. 9 opened new positions and 12 sold out. The largest holders were Ra Capital Management, L.P. ($859K), Balyasny Asset Management L.P. ($644K) and Vanguard Capital Management LLC ($438K). 2 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Werewolf Therapeutics Inc.
- CUSIP
- 95075A107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 9 | $770K |
| Exits | 12 | $600K |
All 13F filers, Q1 2026 → Q2 2026: 3,198,647 shares bought and 6,334,097 shares sold, net −3,135,450 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 45 holders
| Ra Capital Management, L.P. | 0.01% | Reduce -64.3% | 2,387,744 | $859K |
| Balyasny Asset Management L.P. | 0.00% | New | 1,790,089 | $644K |
| Vanguard Capital Management LLC | 0.00% | No change | 1,217,976 | $438K |
| Renaissance Technologies | 0.00% | Add +30.7% | 674,632 | $243K |
| Lynx1 Capital Management LP | 0.03% | No change | 657,786 | $237K |
| Sphera Funds Management LTD. | 0.03% | No change | 626,810 | $226K |
| DC Funds, LP | 16.92% | No change | 589,102 | $212K |
| Verdad Advisers, LP | 0.12% | Add +1071.7% | 348,709 | $126K |
| Geode Capital Management, LLC | 0.00% | Reduce -13.8% | 335,815 | $121K |
| Bank of America Corp. | 0.00% | Add +17.7% | 311,502 | $112K |
| XTX Topco Ltd | 0.00% | Add +433.1% | 271,478 | $98K |
| Jane Street Group, LLC | 0.00% | Add +204.0% | 251,837 | $91K |
| UBS Group AG | 0.00% | Add +222.8% | 215,838 | $78K |
| Vanguard Fiduciary Trust Co. | 0.00% | No change | 157,726 | $57K |
| State Street Corp. | 0.00% | No change | 119,168 | $43K |
| Squarepoint Ops LLC | 0.00% | New | 103,242 | $37K |
| BlackRock, Inc. | 0.00% | Reduce -0.0% | 101,573 | $37K |
| Rangeley Capital, LLC | 0.04% | New | 100,000 | $36K |
| Northern Trust Corp. | 0.00% | No change | 86,851 | $31K |
| Alyeska Investment Group, L.P. | 0.00% | No change | 86,554 | $31K |
| MPM Bioimpact LLC | 0.00% | Reduce -93.4% | 80,142 | $29K |
| Millennium Management | 0.00% | Reduce -53.0% | 62,055 | $22K |
| Virtu Financial LLC | 0.00% | New | 45,467 | $16K |
| Gsa Capital Partners LLP | 0.00% | New | 27,146 | $10K |
| Two Sigma Investments, LP | 0.00% | New | 27,300 | $10K |
| StoneX Group Inc. | 0.00% | New | 20,000 | $9K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -47.7% | 20,023 | $7K |
| Morgan Stanley | 0.00% | Reduce -43.5% | 19,108 | $7K |
| Certuity, LLC | 0.00% | No change | 15,000 | $5K |
| HBK Sorce Advisory LLC | 0.00% | No change | 13,227 | $5K |
| Barclays PLC | 0.00% | No change | 13,235 | $5K |
| Larson Financial Group LLC | 0.00% | No change | 13,052 | $5K |
| LPL Financial LLC | 0.00% | Add +17.9% | 11,791 | $4K |
| Ranch Capital Advisors Inc. | 0.00% | Reduce -8.3% | 11,000 | $4K |
| Marest Capital, LLC | 0.00% | New | 10,870 | $4K |
| Cetera Investment Advisers | 0.00% | No change | 10,200 | $4K |
| Tower Research Capital LLC (TRC) | 0.00% | New | 9,897 | $4K |
| Osaic Holdings, Inc. | 0.00% | No change | 8,625 | $3K |
| Financial Perspectives, Inc | 0.00% | No change | 6,750 | $2K |
| Group One Trading LLC | 0.00% | No change | 1,871 | $673 |
| JPMorgan Chase & Co. | 0.00% | Add +0.6% | 2,108 | $650 |
| BNP Paribas Financial Markets | 0.00% | No change | 790 | $284 |
| Simplex Trading, LLC | 0.00% | Reduce -99.2% | 255 | $91 |
| SBI Securities Co., Ltd. | 0.00% | Add +25.0% | 100 | $36 |
| Optiver Holding B.V. | 0.00% | No change | 22 | $8 |
"% of holder's portfolio" is HOWL's weight in each manager's 13F, not the share of Werewolf Therapeutics Inc. the manager owns.