Werewolf Therapeutics, Inc.
HOWL- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001785530
In the last 90 days, Werewolf Therapeutics, Inc. insiders filed 0 open-market purchases and 1 sale; 45 institutions reported holding it in 13F filings for Q2 2026, worth $3.91M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Werewolf Therapeutics, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 48
- −2 vs. Q4 2025
- Shares held
- 14.0M
- +672.7K (+5.0%) vs. Q4 2025
- Total value
- $11.7M
- +$3.21M (+38.0%) vs. Q4 2025
- New holders
- 10
- 9 more added
- Sold out
- 12
- 12 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting HOWL on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 45 | $3.91M |
| Q1 2026 | 48 | $11.7M |
| Q4 2025 | 51 | $9.34M |
| Q3 2025 | 62 | $41.6M |
| Q2 2025 | 65 | $24.3M |
| Q1 2025 | 70 | $26.7M |
| Q4 2024 | 73 | $41.7M |
| Q3 2024 | 69 | $68.3M |
| Q2 2024 | 71 | $79.2M |
| Q1 2024 | 61 | $209.0M |
| Q4 2023 | 41 | $106.8M |
| Q3 2023 | 35 | $51.1M |
| Q2 2023 | 36 | $73.3M |
| Q1 2023 | 38 | $62.5M |
| Q4 2022 | 39 | $42.8M |
| Q3 2022 | 44 | $94.5M |
| Q2 2022 | 46 | $78.0M |
| Q1 2022 | 49 | $83.5M |
| Q4 2021 | 51 | $228.3M |
| Q3 2021 | 42 | $326.2M |
| Q2 2021 | 45 | $344.3M |
| Q1 2021 | 0 | $0 |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Werewolf Therapeutics, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Optiver Holding B.V. | 22 | $18 | 0.00% | 00.0% | Unchanged |
| FMR LLC | 39 | $32 | 0.00% | −3,592−98.9% | Reduced |
| SRS Capital Advisors, Inc. | 12 | $32 | 0.00% | −27−69.2% | Reduced |
| SBI Securities Co., Ltd. | 80 | $67 | 0.00% | +40+100.0% | Added |
| Northwestern Mutual Wealth Management Co | 200 | $167 | 0.00% | +196+4,900.0% | Added |
| BNP Paribas Arbitrage, SA | 790 | $658 | 0.00% | −2−0.3% | Reduced |
| Group One Trading, L.P. | 1,871 | $1.56K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 2,096 | $1.67K | 0.00% | +24+1.2% | Added |
| Citigroup Inc | 3,384 | $2.82K | 0.00% | +3,383+338,300.0% | Added |
| TFC Financial Management | 4,500 | $3.75K | 0.00% | 00.0% | Unchanged |
| Financial Perspectives, Inc | 6,750 | $5.62K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 8,625 | $7.16K | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 10,000 | $8.33K | 0.00% | +10,000 | New |
| Cetera Investment Advisers | 10,200 | $8.49K | 0.00% | 00.0% | Unchanged |
| Vanguard Global Advisers, LLC | 10,343 | $8.62K | 0.00% | +10,343 | New |
| Citadel Advisors LLC | 10,382 | $8.64K | 0.00% | +10,382 | New |
| HBK Sorce Advisory LLC | 13,227 | $8.99K | 0.00% | 00.0% | Unchanged |
| Pacitti Group Inc. | 12,000 | $9.99K | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 13,052 | $10.9K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 13,235 | $11.0K | 0.00% | −10.0% | Reduced |
| Delta Investment Management, LLC | 14,925 | $12.4K | 0.00% | 00.0% | Unchanged |
| Camden Capital, LLC | 15,000 | $12.5K | 0.00% | 00.0% | Unchanged |
| HRT Financial LP | 17,861 | $14.0K | 0.00% | +17,861 | New |
| Raymond James Financial Inc | 19,778 | $16.5K | 0.00% | +19,778 | New |
| Verdad Advisers, LP | 29,760 | $24.8K | 0.03% | +29,760 | New |
| Simplex Trading, LLC | 32,526 | $27.1K | 0.00% | +8,472+35.2% | Added |
| Morgan Stanley | 33,799 | $28.1K | 0.00% | −12,203−26.5% | Reduced |
| Goldman Sachs Group Inc | 38,266 | $31.9K | 0.00% | +4,193+12.3% | Added |
| XTX Topco Ltd | 50,929 | $42.4K | 0.00% | +50,929 | New |
| UBS Group AG | 66,857 | $55.7K | 0.00% | +6,149+10.1% | Added |
| Bridgeway Capital Management, LLC | 77,000 | $64.1K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 82,836 | $69.0K | 0.00% | −74,486−47.3% | Reduced |
| Alyeska Investment Group, L.P. | 86,554 | $72.1K | 0.00% | −149,151−63.3% | Reduced |
| Northern Trust Corp | 86,851 | $72.3K | 0.00% | 00.0% | Unchanged |
| BlackRock, Inc. | 101,608 | $84.6K | 0.00% | −350.0% | Reduced |
| State Street Corp | 119,168 | $99.2K | 0.00% | 00.0% | Unchanged |
| Millennium Management LLC | 132,050 | $109.9K | 0.00% | −108,059−45.0% | Reduced |
| Vanguard Fiduciary Trust Co | 157,726 | $131.4K | 0.00% | +157,726 | New |
| Bank of America Corp | 264,583 | $220.1K | 0.00% | −472,967−64.1% | Reduced |
| Geode Capital Management, LLC | 389,487 | $324.4K | 0.00% | +53,601+16.0% | Added |
| Renaissance Technologies LLC | 516,218 | $429.8K | 0.00% | −161,548−23.8% | Reduced |
| Squadron Capital Management LLC | 563,535 | $469.2K | 0.19% | +563,535 | New |
| DC Funds, LP | 589,102 | $490.5K | 33.01% | 00.0% | Unchanged |
| Sphera Funds Management Ltd. | 626,810 | $521.9K | 0.09% | 00.0% | Unchanged |
| Lynx1 Capital Management LP | 657,786 | $547.7K | 0.09% | +1,860+0.3% | Added |
| MPM Oncology Impact Management LP | 1,208,810 | $1.01M | 0.08% | −184,747−13.3% | Reduced |
| Vanguard Capital Management LLC | 1,217,976 | $1.01M | 0.00% | +1,217,976 | New |
| Ra Capital Management, L.P. | 6,681,307 | $5.56M | 0.06% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −99,829−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −60,003−100.0% | Sold out |
| Regal Investment Advisors LLC | 0 | $0 | 0.00% | −52,593−100.0% | Sold out |
| Edgewood Management LLC | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −14,483−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −12,185−100.0% | Sold out |
| Highline Wealth Partners LLC | 0 | $0 | 0.00% | −12,000−100.0% | Sold out |
| StoneX Group Inc. | 0 | $0 | 0.00% | −10,511−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −10,300−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −4,387−100.0% | Sold out |
| Nisa Investment Advisors, LLC | 0 | $0 | 0.00% | −345−100.0% | Sold out |
| Royal Bank of Canada | 0 | $0 | 0.00% | −62−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |