MPM BioVentures 2014 LLC is 10% Owner at Werewolf Therapeutics, Inc. (HOWL). They have made 1 open-market trade across 1 company since 2021, most recently 2025-11-20.
CIK 0001765021
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $2.0M since 2021, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| HOWL | SELL · 10b5-1 | 2025-11-18 | 2025-11-20 | $0.93 | $210K | +8.8% | -20.7% | -21.9% |
| HOWL | SELL · 10b5-1 | 2025-11-13 | 2025-11-17 | $0.96 | $401K | +11.1% | +18.9% | -26.8% |
| HOWL | SELL · 10b5-1 | 2025-11-04 | 2025-11-06 | $1.22 | $533K | -22.4% | -15.3% | -45.6% |
| HOWL | SELL · 10b5-1 | 2025-10-27 | 2025-10-29 | $1.64 | $685K | -25.2% | -35.5% | -56.7% |
| HOWL | BUY | 2021-05-04 | 2021-05-06 | $16.00 | $2.0M | -13.9% | -13.3% | +15.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.