WEREWOLF THERAPEUTICS INC (HOWL)
Institutional ownership reported to the SEC as of Q2 2026, across 21 quarters.
Institutions report 11,449,639 shares against 48,599,066 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | $859.3K | 2,387,744 | 0.01% | 21q | -64.3%-$1.5M |
| Balyasny Asset Management L.P. | $644.3K | 1,790,089 | 0.00% | new | NEW |
| Lynx1 Capital Management LP | $473.5K | 1,315,572 | 0.03% | 3q | +100.0%+$236.7K |
| VANGUARD CAPITAL MANAGEMENT LLC | $438.5K | 1,217,976 | 0.00% | 2q | HELD |
| RENAISSANCE TECHNOLOGIES LLC | $242.8K | 674,632 | 0.00% | 17q | +30.7%+$57.0K |
| SPHERA FUNDS MANAGEMENT LTD. | $225.6K | 626,810 | 0.03% | 21q | HELD |
| DC Funds, LP | $212.0K | 589,102 | 16.92% | 21q | HELD |
| Verdad Advisers, LP | $125.5K | 348,709 | 0.12% | 2q | +1071.7%+$114.8K |
| GEODE CAPITAL MANAGEMENT, LLC | $120.9K | 335,815 | 0.00% | 21q | -13.8%-$19.3K |
| BANK OF AMERICA CORP /DE/ | $111.8K | 311,502 | 0.00% | 21q | +17.7%+$16.8K |
| XTX Topco Ltd | $97.7K | 271,478 | 0.00% | 2q | +433.1%+$79.4K |
| JANE STREET GROUP, LLC | $90.6K | 251,837 | 0.00% | 5q | +204.0%+$60.8K |
| UBS Group AG | $77.7K | 215,838 | 0.00% | 21q | +222.8%+$53.6K |
| VANGUARD FIDUCIARY TRUST CO | $56.8K | 157,726 | 0.00% | 2q | HELD |
| STATE STREET CORP | $42.9K | 119,168 | 0.00% | 21q | HELD |
| Squarepoint Ops LLC | $37.2K | 103,242 | 0.00% | new | NEW |
| BlackRock, Inc. | $36.6K | 101,573 | 0.00% | 8q | HELD |
| Rangeley Capital, LLC | $36.0K | 100,000 | 0.03% | new | NEW |
| CITADEL ADVISORS LLC | $32.6K | options only | 0.00% | 2q | OPTIONS |
| NORTHERN TRUST CORP | $31.3K | 86,851 | 0.00% | 21q | HELD |
| Alyeska Investment Group, L.P. | $31.2K | 86,554 | 0.00% | 21q | HELD |
| MPM BIOIMPACT LLC | $28.9K | 80,142 | 0.00% | 21q | -93.4%-$406.3K |
| MILLENNIUM MANAGEMENT LLC | $22.3K | 62,055 | 0.00% | 18q | -53.0%-$25.2K |
| TWO SIGMA INVESTMENTS, LP | $9.8K | 27,300 | 0.00% | new | NEW |
| StoneX Group Inc. | $9.0K | 20,000 | 0.00% | new | NEW |
| GOLDMAN SACHS GROUP INC | $7.2K | 20,023 | 0.00% | 10q | -47.7%-$6.6K |
| MORGAN STANLEY | $6.9K | 19,108 | 0.00% | 21q | -43.5%-$5.3K |
| CERTUITY, LLC | $5.4K | 15,000 | 0.00% | 11q | HELD |
| HBK Sorce Advisory LLC | $5.3K | 13,227 | 0.00% | 14q | HELD |
| BARCLAYS PLC | $4.8K | 13,235 | 0.00% | 10q | HELD |
| Larson Financial Group LLC | $4.7K | 13,052 | 0.00% | 7q | HELD |
| LPL Financial LLC | $4.2K | 11,791 | 0.00% | 2q | +17.9% |
| Ranch Capital Advisors Inc. | $4.0K | 11,000 | 0.00% | 3q | -8.3% |
| Marest Capital, LLC | $3.9K | 10,870 | 0.00% | new | NEW |
| Cetera Investment Advisers | $3.7K | 10,200 | 0.00% | 4q | HELD |
| Tower Research Capital LLC (TRC) | $3.6K | 9,897 | 0.00% | new | NEW |
| OSAIC HOLDINGS, INC. | $3.1K | 8,625 | 0.00% | 7q | HELD |
| Financial Perspectives, Inc | $2.4K | 6,750 | 0.00% | 21q | HELD |
| GROUP ONE TRADING LLC | $673 | 1,871 | 0.00% | 4q | HELD |
| JPMORGAN CHASE & CO | $650 | 2,108 | 0.00% | 21q | +0.6% |
| SIMPLEX TRADING, LLC | $486 | 255 | 0.00% | new | NEW |
| BNP PARIBAS FINANCIAL MARKETS | $284 | 790 | 0.00% | 7q | HELD |
| SBI Securities Co., Ltd. | $36 | 100 | 0.00% | 7q | +25.0% |
| Virtu Financial LLC | $16 | 45,467 | 0.00% | new | NEW |
| GSA CAPITAL PARTNERS LLP | $10 | 27,146 | 0.00% | new | NEW |
| Optiver Holding B.V. | $8 | 22 | 0.00% | 4q | HELD |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-07-02 | 13D/A | RA Capital Management, L.P.with 3 co-filers | 4.1% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 44 | $4.2M | 11,449,639 | 8 | 10 | 9 | 0.8% |
| Q1 2026 | 47 | $11.6M | 13,982,055 | 6 | 8 | 9 | 0.0% |
| Q4 2025 | 50 | $9.3M | 14,735,209 | 7 | 12 | 15 | 0.0% |
| Q3 2025 | 57 | $41.4M | 21,005,786 | 7 | 8 | 18 | 0.0% |
| Q2 2025 | 63 | $24.2M | 22,217,074 | 15 | 13 | 18 | 0.0% |
| Q1 2025 | 69 | $26.5M | 27,185,720 | 6 | 21 | 19 | 0.1% |
| Q4 2024 | 72 | $41.4M | 27,918,415 | 16 | 25 | 14 | 0.2% |
| Q3 2024 | 64 | $67.7M | 31,935,498 | 10 | 23 | 13 | 0.0% |
| Q2 2024 | 67 | $78.4M | 32,071,756 | 21 | 20 | 14 | 0.2% |
| Q1 2024 | 55 | $207.9M | 32,043,276 | 22 | 14 | 10 | 0.1% |
| Q4 2023 | 37 | $106.0M | 27,458,424 | 9 | 12 | 6 | 0.0% |
| Q3 2023 | 33 | $50.8M | 23,753,443 | 2 | 8 | 4 | 0.0% |
| Q2 2023 | 34 | $73.0M | 23,922,939 | 2 | 9 | 3 | 0.0% |
| Q1 2023 | 34 | $59.3M | 22,826,275 | 8 | 10 | 4 | 0.0% |
| Q4 2022 | 31 | $40.6M | 19,791,747 | 8 | 5 | 7 | 0.0% |
| Q3 2022 | 39 | $94.5M | 20,956,559 | 4 | 12 | 11 | 0.0% |
| Q2 2022 | 40 | $78.0M | 19,071,927 | 11 | 6 | 13 | 0.0% |
| Q1 2022 | 48 | $84.3M | 19,019,676 | 5 | 15 | 15 | 0.0% |
| Q4 2021 | 51 | $228.4M | 19,152,556 | 10 | 21 | 7 | 0.0% |
| Q3 2021 | 42 | $326.2M | 19,007,939 | 2 | 15 | 12 | 0.0% |
| Q2 2021 | 45 | $344.3M | 19,758,281 | 44 | 0 | 0 | 0.0% |