HOWL — Werewolf Therapeutics, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2021-04-30.
Performance
Technicals
Others in Healthcare
Measured signals that fired on HOWL
| date | signal | measured base rate |
|---|---|---|
| 2026-06-16 | Cluster sale: three or more insiders insider | -0.37% over 21 days · t = -3.38 · n = 21,542 statistically distinguishable from its control group |
| 2026-05-12 | Cluster sale: three or more insiders insider | -0.37% over 21 days · t = -3.38 · n = 21,542 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-07-07 | EVNIN LUKE Director | Open-market sale 10b5-1 plan | 107.4K | 0.31 | 33.3K |
| 2026-07-06 | EVNIN LUKE Director | Open-market sale 10b5-1 plan | 35.8K | 0.32 | 11.4K |
| 2026-06-29 | EVNIN LUKE Director | Open-market sale 10b5-1 plan | 157.1K | 0.30 | 47.1K |
| 2026-06-17 | RA CAPITAL MANAGEMENT, L.P. 10% owner | Open-market sale | 389.2K | 0.35 | 136.2K |
| 2026-06-17 | Shah Rajeev M. 10% owner | Open-market sale | 389.2K | 0.35 | 136.2K |
| 2026-06-17 | Kolchinsky Peter 10% owner | Open-market sale | 389.2K | 0.35 | 136.2K |
| 2026-06-17 | RA Capital Healthcare Fund LP 10% owner | Open-market sale | 389.2K | 0.35 | 136.2K |
| 2026-06-17 | RA CAPITAL MANAGEMENT, L.P. 10% owner | Open-market sale | 27.7K | 0.35 | 9.7K |
| 2026-06-17 | Kolchinsky Peter 10% owner | Open-market sale | 27.7K | 0.35 | 9.7K |
| 2026-06-17 | RA Capital Healthcare Fund LP 10% owner | Open-market sale | 27.7K | 0.35 | 9.7K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 5.6M | 6.7M |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.0M | 1.2M |
| MPM BIOIMPACT LLC | 1.0M | 1.2M |
| Lynx1 Capital Management LP | 547.7K | 657.8K |
| SPHERA FUNDS MANAGEMENT LTD. | 521.9K | 626.8K |
| DC Funds, LP | 490.5K | 589.1K |
| Squadron Capital Management LLC | 469.2K | 563.5K |
| RENAISSANCE TECHNOLOGIES LLC | 429.8K | 516.2K |
| GEODE CAPITAL MANAGEMENT, LLC | 324.4K | 389.5K |
| BANK OF AMERICA CORP /DE/ | 220.1K | 264.6K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 425 | 2026-08-21 | — | on EDGAR ↗ |
| 8-K | 2026-08-21 | 2026-08-21 | on EDGAR ↗ |
| 8-K | 2026-08-20 | 2026-08-14 | on EDGAR ↗ |
| 10-Q | 2026-07-31 | 2026-06-30 | on EDGAR ↗ |
| 8-K | 2026-07-31 | 2026-07-31 | on EDGAR ↗ |
| 4 | 2026-07-08 | 2026-07-06 | on EDGAR ↗ |
| 144 | 2026-07-06 | — | on EDGAR ↗ |
| 144 | 2026-07-06 | — | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Why is Werewolf Therapeutics stock surging more than 100% today? · 2026-08-21
- Werewolf Therapeutics, Inc. (HOWL) filed form 8-K · 2026-08-21 · SEC EDGAR
- Werewolf Therapeutics stock soars 120% on Ambros merger deal · 2026-08-21
- Werewolf Therapeutics, Inc. (HOWL) filed form 425 · 2026-08-21 · SEC EDGAR
- Werewolf Therapeutics, Inc. (HOWL) filed form 8-K · 2026-08-21 · SEC EDGAR
- Werewolf Therapeutics, Inc. (HOWL) filed form 8-K · 2026-08-20 · SEC EDGAR
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