Who owns Werewolf Therapeutics, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of HOWL from SEC Form 13F filings across 45 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 45 institutions disclosed 10.9M shares of Werewolf Therapeutics, Inc. worth $3.9M — about 22.4% of shares outstanding; the largest disclosed holder is RA CAPITAL MANAGEMENT, L.P.. Source: SEC Form 13F filings, parsed by EvidInvest.
45
13F holders
$3.9M
value, 2026 filers
22.4%
of shares outstanding (10.9M sh)
9
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of HOWL's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | 2.4M | $859,349 | 0.0% | 4.9% | -64.3% |
| 2 | Balyasny Asset Management L.P.NEW | 1.8M | $644,253 | 0.0% | 3.7% | new |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 1.2M | $438,471 | 0.0% | 2.5% | 0.0% |
| 4 | RENAISSANCE TECHNOLOGIES LLC | 674,632 | $242,800 | 0.0% | 1.4% | +30.7% |
| 5 | Lynx1 Capital Management LP | 657,786 | $236,737 | 0.0% | 1.4% | 0.0% |
| 6 | SPHERA FUNDS MANAGEMENT LTD. | 626,810 | $225,589 | 0.0% | 1.3% | 0.0% |
| 7 | DC Funds, LP | 589,102 | $212,018 | 16.9% | 1.2% | 0.0% |
| 8 | Verdad Advisers, LP | 348,709 | $125,500 | 0.1% | 0.7% | +1071.7% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 335,815 | $120,895 | 0.0% | 0.7% | -13.8% |
| 10 | BANK OF AMERICA CORP /DE/ | 311,502 | $111,829 | 0.0% | 0.6% | +17.7% |
| 11 | XTX Topco Ltd | 271,478 | $97,705 | 0.0% | 0.6% | +433.1% |
| 12 | JANE STREET GROUP, LLC | 251,837 | $90,637 | 0.0% | 0.5% | +204.0% |
| 13 | UBS Group AG | 215,838 | $77,702 | 0.0% | 0.4% | +222.8% |
| 14 | VANGUARD FIDUCIARY TRUST CO | 157,726 | $56,781 | 0.0% | 0.3% | 0.0% |
| 15 | STATE STREET CORP | 119,168 | $42,889 | 0.0% | 0.2% | 0.0% |
| 16 | Squarepoint Ops LLCNEW | 103,242 | $37,157 | 0.0% | 0.2% | new |
| 17 | BlackRock, Inc. | 101,573 | $36,556 | 0.0% | 0.2% | 0.0% |
| 18 | Rangeley Capital, LLCNEW | 100,000 | $35,990 | 0.0% | 0.2% | new |
| 19 | NORTHERN TRUST CORP | 86,851 | $31,258 | 0.0% | 0.2% | 0.0% |
| 20 | Alyeska Investment Group, L.P. | 86,554 | $31,151 | 0.0% | 0.2% | 0.0% |
| 21 | MPM BIOIMPACT LLC | 80,142 | $28,851 | 0.0% | 0.2% | -93.4% |
| 22 | MILLENNIUM MANAGEMENT LLC | 62,055 | $22,334 | 0.0% | 0.1% | -53.0% |
| 23 | Virtu Financial LLCNEW | 45,467 | $16,000 | 0.0% | 0.1% | new |
| 24 | TWO SIGMA INVESTMENTS, LPNEW | 27,300 | $9,825 | 0.0% | 0.1% | new |
| 25 | GSA CAPITAL PARTNERS LLPNEW | 27,146 | $10,000 | 0.0% | 0.1% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.