MPM BioVentures 2014, L.P. Insider Trading Activity
MPM BioVentures 2014, L.P., an institutional filer, recorded 28 transactions over the last 12 months across 1 company totaling $2.2M.
Activity concentrated in HOWL with 28 filings. The largest single transaction was a sale of HOWL for $208K on Oct 29, 2025.
Performance Scorecard
Forward stock performance after each transaction by MPM BioVentures 2014, L.P.. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | — | +22.0% | 86% | 28 |
| 90 days | — | +38.6% | 100% | 28 |
| 120 days | — | +26.5% | 89% | 28 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersHOWL · Werewolf Therapeutics, Inc.
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| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | Δ OWNED | ROLE | FILING |
|---|---|---|---|---|---|---|---|---|
Dec 4, 2025 | HOWL | Sell | 83,230 | $0.97 | $81K | −1.7% | Other | |
Dec 3, 2025 | HOWL | Sell | 57,225 | $0.87 | $50K | −1.2% | Other | |
Dec 2, 2025 | HOWL | Sell | 59,277 | $0.89 | $53K | −1.2% | Other | |
Dec 1, 2025 | HOWL | Sell | 60,917 | $0.94 | $57K | −1.2% | 10%+ Owner | |
Nov 28, 2025 | HOWL | Sell | 20,277 | $0.99 | $20K | −0.4% | 10%+ Owner | |
Nov 26, 2025 Filed 3d late | HOWL | Sell | 60,733 | $0.98 | $60K | −1.2% | 10%+ Owner | |
Nov 25, 2025 | HOWL | Sell | 42,533 | $0.92 | $39K | −0.8% | 10%+ Owner | |
Nov 24, 2025 | HOWL | Sell | 88,802 | $0.98 | $87K | −1.7% | 10%+ Owner | |
Nov 21, 2025 | HOWL | Sell | 64,331 | $0.83 | $53K | −1.2% | 10%+ Owner | |
Nov 20, 2025 | HOWL | Sell | 41,152 | $0.89 | $37K | −0.8% | 10%+ Owner | |
Nov 19, 2025 | HOWL | Sell | 66,324 | $0.94 | $62K | −1.2% | 10%+ Owner | |
Nov 18, 2025 | HOWL | Sell | 52,627 | $0.93 | $49K | −1.0% | 10%+ Owner | |
Nov 17, 2025 | HOWL | Sell | 57,061 | $0.95 | $54K | −1.0% | 10%+ Owner | |
Nov 14, 2025 | HOWL | Sell | 61,640 | $0.93 | $57K | −1.1% | 10%+ Owner | |
Nov 13, 2025 | HOWL | Sell | 90,951 | $0.98 | $89K | −1.6% | 10%+ Owner | |
Nov 12, 2025 | HOWL | Sell | 40,669 | $1.09 | $44K | −0.7% | 10%+ Owner | |
Nov 11, 2025 | HOWL | Sell | 55,810 | $1.14 | $64K | −1.0% | 10%+ Owner | |
Nov 10, 2025 | HOWL | Sell | 48,570 | $1.18 | $57K | −0.8% | 10%+ Owner | |
Nov 7, 2025 Filed 3d late | HOWL | Sell | 68,480 | $1.11 | $76K | −1.2% | 10%+ Owner | |
Nov 6, 2025 | HOWL | Sell | 54,452 | $1.21 | $66K | −0.9% | 10%+ Owner | |
Nov 5, 2025 | HOWL | Sell | 47,950 | $1.22 | $58K | −0.8% | 10%+ Owner | |
Nov 4, 2025 | HOWL | Sell | 140,488 | $1.22 | $171K | −2.3% | 10%+ Owner | |
Nov 3, 2025 | HOWL | Sell | 94,063 | $1.29 | $121K | −1.5% | 10%+ Owner | |
Oct 31, 2025 | HOWL | Sell | 114,044 | $1.28 | $146K | −1.8% | 10%+ Owner | |
Oct 30, 2025 | HOWL | Sell | 86,936 | $1.43 | $124K | −1.3% | 10%+ Owner | |
Oct 29, 2025 | HOWL | Sell | 134,240 | $1.55 | $208K | −2.0% | 10%+ Owner | |
Oct 28, 2025 | HOWL | Sell | 69,068 | $1.64 | $113K | −1.0% | 10%+ Owner | |
Oct 27, 2025 | HOWL | Sell | 72,709 | $1.72 | $125K | −1.1% | 10%+ Owner |
Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| HOWL | Werewolf Therapeutics, Inc. | 28 | $2.2M |
Other insiders at Werewolf Therapeutics, Inc.
3 other tracked filers at HOWL.