Werewolf Therapeutics
HOWL · NASDAQ
$1.05+$0.01 (+0.96%)TodayMarket closed ·
Prev close $1.04
Who owns HOWL
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 24.1% of HOWL’s shares.
- RA Capital Management, LP4.1%
- MPM Capital Inc.3.8%
- Balyasny Asset Management LP3.7%
- Longwood Fund Management LLC3.5%
- Next 6 largest institutions9.1%
- All other shareholders75.9%
| Holder | Shares | % of shares |
|---|---|---|
| RA Capital Management, LP | 1.99M | 4.09% |
| MPM Capital Inc. | 1.83M | 3.76% |
| Balyasny Asset Management LP | 1.79M | 3.68% |
| Longwood Fund Management LLC | 1.68M | 3.45% |
| Vanguard Capital Management, LLC | 1.22M | 2.51% |
| Renaissance Technologies LLC | 674.63K | 1.39% |
| Lynx1 Capital Advisors LLC | 657.79K | 1.35% |
| Hicklin Daniel J | 647.05K | 1.33% |
| Sphera Funds Management Ltd. | 626.81K | 1.29% |
| DC Funds, LP | 589.10K | 1.21% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 873.75K | 1.80% |
| Vanguard Extended Market Index Fund | 344.23K | 0.71% |
| Fidelity Extended Market Index Fund | 165.50K | 0.34% |
| Fidelity Total Market Index Fund | 54.58K | 0.11% |
| Fidelity Series Total Market Index Fund | 42.63K | 0.09% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $2.09M (51 trades) of HOWL on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| EVNIN LUKE | Sale | 107.43K | $33.30K |
| EVNIN LUKE | Sale | 35.77K | $11.45K |
| RA Capital Healthcare Fund LP | Sale | 27.70K | $9.69K |
| RA Capital Healthcare Fund LP | Sale | 389.22K | $136.23K |
| RA Capital Healthcare Fund LP | Sale | 9.94K | $3.68K |
| RA Capital Healthcare Fund LP | Sale | 139.69K | $51.68K |
| RA Capital Healthcare Fund LP | Sale | 8.55K | $3.34K |
| RA Capital Healthcare Fund LP | Sale | 120.22K | $46.88K |
| RA Capital Healthcare Fund LP | Sale | 11.32K | $4.53K |
| RA Capital Healthcare Fund LP | Sale | 159.12K | $63.65K |
Short interest
Settled Sep 30, 2026
- Shares short
- 2.51M
- Days to cover
- 3.70
- % of shares outstanding
- 5.17%
- Average daily volume
- 679.29K
- Change since last report
- +47.2%
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