Werewolf Therapeutics, Inc. (HOWL) Insider Trading
Over the last 3 months, HOWL insiders made 0 open-market buys and 31 sales, a net sale of -$1.4M (SEC Form 4). Over the last 6 months, 27 institutions increased and 29 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
31
Net (3m)
-$1.4M
Insider trades by month Buys Sells
Nov
Dec
Jan
Apr
May
Jun
Context3-month price -30.8%Institutions reducing (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 3, 2026 | EVNIN LUKEdirector | Sell | 29,595 | $0.45 |
| Jun 3, 2026 | EVNIN LUKEdirector | Sell | 29,749 | $0.42 |
| Jun 3, 2026 | EVNIN LUKEdirector | Sell | 80,459 | $0.47 |
| May 29, 2026 | EVNIN LUKEdirector | Sell | 80,852 | $0.48 |
| May 29, 2026 | EVNIN LUKEdirector | Sell | 32,556 | $0.45 |
| May 29, 2026 | EVNIN LUKEdirector | Sell | 27,698 | $0.46 |
| May 26, 2026 | EVNIN LUKEdirector | Sell | 36,387 | $0.42 |
| May 26, 2026 | EVNIN LUKEdirector | Sell | 67,950 | $0.47 |
| May 26, 2026 | EVNIN LUKEdirector | Sell | 87,425 | $0.45 |
| May 20, 2026 | EVNIN LUKEdirector | Sell | 62,970 | $0.45 |
| May 20, 2026 | EVNIN LUKEdirector | Sell | 22,184 | $0.50 |
| May 20, 2026 | EVNIN LUKEdirector | Sell | 85,895 | $0.43 |
| May 13, 2026 | EVNIN LUKEdirector | Sell | 44,679 | $0.54 |
| May 12, 2026 | EVNIN LUKEdirector | Sell | 33,948 | $0.67 |
| May 12, 2026 | RA CAPITAL MANAGEMENT, L.P.10 percent owner | Sell | 6,719 | $0.64 |
| May 12, 2026 | RA CAPITAL MANAGEMENT, L.P.10 percent owner | Sell | 94,432 | $0.64 |
| May 12, 2026 | RA CAPITAL MANAGEMENT, L.P.10 percent owner | Sell | 5,812 | $0.67 |
| May 12, 2026 | RA CAPITAL MANAGEMENT, L.P.10 percent owner | Sell | 81,678 | $0.67 |
| May 12, 2026 | RA CAPITAL MANAGEMENT, L.P.10 percent owner | Sell | 351,514 | $0.71 |
| May 12, 2026 | EVNIN LUKEdirector | Sell | 67,885 | $0.64 |
| May 12, 2026 | EVNIN LUKEdirector | Sell | 305,741 | $0.70 |
| May 12, 2026 | RA CAPITAL MANAGEMENT, L.P.10 percent owner | Sell | 25,012 | $0.71 |
| May 7, 2026 | EVNIN LUKEdirector | Sell | 6,860 | $0.69 |
| May 7, 2026 | EVNIN LUKEdirector | Sell | 79,086 | $0.63 |
| May 7, 2026 | EVNIN LUKEdirector | Sell | 14,635 | $0.66 |
| May 4, 2026 | EVNIN LUKEdirector | Sell | 58,394 | $0.73 |
| May 4, 2026 | EVNIN LUKEdirector | Sell | 168,262 | $0.72 |
| May 4, 2026 | EVNIN LUKEdirector | Sell | 47,963 | $0.72 |
| Apr 29, 2026 | EVNIN LUKEdirector | Sell | 56,559 | $0.69 |
| Apr 29, 2026 | EVNIN LUKEdirector | Sell | 53,940 | $0.85 |
Source: HOWL SEC Form 4 filings, latest Jun 3, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their HOWL positions over the last 6 months (SEC Form 13F).
Increased
27
New positions
14
Reduced
29
Sold out
26
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | Unchanged | 6.7M | Feb 17, 2026 |
| RA CAPITAL MANAGEMENT, L.P. | Unchanged | 6.7M | May 15, 2026 |
| BANK OF AMERICA CORP /DE/ | Reduced | 1.8M | Feb 3, 2026 |
| VANGUARD GROUP INC | Unchanged | 1.4M | Jan 29, 2026 |
| BIOIMPACT CAPITAL LLC | Reduced | 1.4M | Feb 17, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 1.2M | May 15, 2026 |
| BIOIMPACT CAPITAL LLC | Reduced | 1.2M | May 15, 2026 |
| BANK OF AMERICA CORP /DE/ | Reduced | 738K | Feb 17, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 678K | Feb 12, 2026 |
| LYNX1 CAPITAL MANAGEMENT LP | Increased | 658K | May 4, 2026 |
| LYNX1 CAPITAL MANAGEMENT LP | New Position | 656K | Feb 17, 2026 |
| SPHERA FUNDS MANAGEMENT LTD. | Unchanged | 627K | Feb 17, 2026 |
| SPHERA FUNDS MANAGEMENT LTD. | Unchanged | 627K | May 15, 2026 |
| DC FUNDS, LP | Unchanged | 589K | Feb 13, 2026 |
| DC FUNDS, LP | Unchanged | 589K | May 14, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.