MPM Asset Management Investors BV2014 LLC is 10% Owner at Werewolf Therapeutics, Inc. (HOWL). They have made 2 open-market trades across 2 companies since 2021, most recently 2025-12-01.
CIK 0001609495
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.
0 open-market purchases, against 2 sales. 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 | 2025-11-26 | 2025-12-01 | $0.96 | $254K | +21.1% | -29.6% | -35.2% |
| HOWL | SELL · 10b5-1 | 2025-10-30 | 2025-11-03 | $1.33 | $783K | -26.4% | -27.2% | -46.2% |
| HOWL | SELL | 2025-03-27 | 2025-04-30 | $1.05 | $2K | +9.3% | +32.2% | +42.0% |
| ITOS | SELL · 10b5-1 | 2021-09-21 | 2021-09-23 | $27.50 | $933K | -4.3% | -3.1% | +65.1% |
| HARP | SELL | 2021-02-05 | 2021-02-09 | $20.05 | $3.5M | -9.3% | -0.1% | +10.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.