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sellWeak cluster of 310b5-1 plan

MPM BioVentures 2014, L.P. sold $296k of HOWL

owner at Werewolf Therapeutics, Inc.. 242,890 shares at an average of $1.22, traded Nov 4, 2025, filed Nov 6, 2025.

Warning score
21
Value
$296k
242,890 shares
Holdings after
5,904,720
-4% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    10% owner
    +12
  • Trade size
    $296k at market
    +14
  • Share of holdings sold
    Sold 4.0% of holdings
    0
  • Cluster
    3 insiders selling within 14 days
    +15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

HOWLOct 9, 2026 · close 0.98
Since filing Nov 6, 2025: -18.3%SPY +17.4% · excess -35.7%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001231919-25-000441, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Nov 4, 2025SOpen-market sale
Common Stockindirect: See Footnote10b5-1
-140,488$1.22$171k6,007,122Nov 6, 2025
Nov 5, 2025SOpen-market sale
Common Stockindirect: See Footnote10b5-1
-47,950$1.22$58k5,959,172Nov 6, 2025
Nov 6, 2025SOpen-market sale
Common Stockindirect: See Footnote10b5-1
-54,452$1.21$66k5,904,720Nov 6, 2025

Related signals

Other insiders at Werewolf Therapeutics, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
0Weak
HOWLsell10b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$21k
38,782 shares
-2%
2Weak
HOWLsell10b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$62k
111,227 shares
-5%
2Weak
HOWLsell10b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$54k
91,374 shares
-4%
1Weak
HOWLsell10b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$46k
71,054 shares
-3%
2Weak
HOWLsell10b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$48k
78,377 shares
-3%
12Weak
HOWLsell10b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$185k
291,283 shares
-10%
17Weak
HOWLsell 310b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$52k
48,171 shares
-2%
19Weak
HOWLsell 310b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$89k
82,971 shares
-3%
20Weak
HOWLsell 310b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$95k
95,179 shares
-3%
20Weak
HOWLsell 310b5-1
Werewolf Therapeutics, Inc.
Luke Evnin
director
$118k
128,185 shares
-4%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

MPM BioVentures 2014, L.P. sold $296k of HOWL | InsiderTell