Werewolf Therapeutics, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for Werewolf Therapeutics, Inc. (HOWL), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are HOWL insiders buying or selling?
In the last 12 months, Werewolf Therapeutics, Inc. insiders reported 0 open-market purchases ($0) and 53 sales ($8.7M) — net selling of $8.7M. Since May 2021, Trabud has recorded 71 Form 4 filings for HOWL: 14 buys ($91.7M) and 57 sells ($8.7M).
Source: SEC EDGAR Form 4
Key Statistics (May 2021 – Jul 8, 2026)
Total Form 4 filings
71
SEC EDGAR
Insider filers
12
Insider buys (14)
$91.7M
Insider sells (57)
$8.7M
Insider sentiment
Net buyingNet insider flow of $83.0M in net buying since May 2021, and $8.7M in net selling over the last 12 months.
Recent HOWL insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Jul 8, 2026 | Luke Evnin | Director | Sale | 143.2K | $0.31 | $44.7K | SEC ↗ |
| Jun 29, 2026 | Luke Evnin | Director | Sale | 157.1K | $0.30 | $47.1K | SEC ↗ |
| Jun 22, 2026 | Peter Kolchinsky | 10% Owner | Sale | 416.9K | $0.35 | $145.9K | SEC ↗ |
| Jun 16, 2026 | Peter Kolchinsky | 10% Owner | Sale | 448.8K | $0.39 | $173.8K | SEC ↗ |
| Jun 12, 2026 | Peter Kolchinsky | 10% Owner | Sale | 678.2K | $0.37 | $253.6K | SEC ↗ |
| Jun 10, 2026 | Luke Evnin | Director | Sale | 76.9K | $0.37 | $28.5K | SEC ↗ |
| Jun 8, 2026 | Luke Evnin | Director | Sale | 105.6K | $0.41 | $43.0K | SEC ↗ |
| Jun 3, 2026 | Luke Evnin | Director | Sale | 139.8K | $0.46 | $63.6K | SEC ↗ |
| May 29, 2026 | Luke Evnin | Director | Sale | 141.1K | $0.47 | $66.2K | SEC ↗ |
| May 26, 2026 | Luke Evnin | Director | Sale | 191.8K | $0.45 | $86.6K | SEC ↗ |
| May 20, 2026 | Luke Evnin | Director | Sale | 171.0K | $0.45 | $76.4K | SEC ↗ |
| May 13, 2026 | Luke Evnin | Director | Sale | 44.7K | $0.54 | $24.1K | SEC ↗ |
| May 12, 2026 | Luke Evnin | Director | Sale | 407.6K | $0.69 | $280.2K | SEC ↗ |
| May 12, 2026 | Peter Kolchinsky | 10% Owner | Sale | 565.2K | $0.69 | $390.7K | SEC ↗ |
| May 7, 2026 | Luke Evnin | Director | Sale | 100.6K | $0.64 | $64.2K | SEC ↗ |
| May 4, 2026 | Luke Evnin | Director | Sale | 274.6K | $0.72 | $198.3K | SEC ↗ |
| Apr 29, 2026 | Luke Evnin | Director | Sale | 205.9K | $0.75 | $154.5K | SEC ↗ |
| Jan 20, 2026 | Luke Evnin | Director | Sale | 38.8K | $0.54 | $20.9K | SEC ↗ |
| Jan 15, 2026 | Luke Evnin | Director | Sale | 111.2K | $0.56 | $61.8K | SEC ↗ |
| Jan 12, 2026 | Luke Evnin | Director | Sale | 91.4K | $0.59 | $53.5K | SEC ↗ |
| Jan 7, 2026 | Luke Evnin | Director | Sale | 71.1K | $0.65 | $45.9K | SEC ↗ |
| Jan 2, 2026 | Luke Evnin | Director | Sale | 78.4K | $0.62 | $48.4K | SEC ↗ |
| Dec 29, 2025 | Luke Evnin | Director | Sale | 291.3K | $0.64 | $185.2K | SEC ↗ |
| Dec 17, 2025 | Luke Evnin | Director | Sale | 48.2K | $1.08 | $52.0K | SEC ↗ |
| Dec 12, 2025 | Luke Evnin | Director | Sale | 83.0K | $1.07 | $88.6K | SEC ↗ |
Showing the 25 most recent of 71 Form 4 filings for Werewolf Therapeutics, Inc..
Most active HOWL insiders
- Luke Evnin33 filings
- Ansbert Gadicke11 filings
- MPM BioVentures 2014, L.P.11 filings
- Peter Kolchinsky8 filings
- Alon Lazarus1 filing
Ask anything about HOWL insider activity
Use Trabud's AI agent to query Werewolf Therapeutics, Inc.'s Form 4 history in plain English — "Show me HOWL CEO purchases this year" or compare it against any other ticker.
Open the AI agentHOWL insider trading FAQ
Are Werewolf Therapeutics, Inc. insiders buying or selling?
In the last 12 months, Werewolf Therapeutics, Inc. insiders reported 0 open-market purchases ($0) and 53 sales ($8.7M) — net selling of $8.7M. Since May 2021, Trabud has recorded 71 Form 4 filings for HOWL: 14 buys ($91.7M) and 57 sells ($8.7M). Over the full record that is net buying of $83.0M.
How many insiders trade HOWL stock?
12 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Werewolf Therapeutics, Inc.. The most recent filing was accepted on Jul 8, 2026.
Where does Trabud get HOWL insider trading data?
All HOWL insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.