Transaction · 0001134657-26-000001

EVNIN LUKE

EVNIN LUKE, DIR, reported an open-market or private sale at Werewolf Therapeutics, Inc. involving 34847.000000 shares for an estimated $21256.67. Reported holdings after the transaction were 2515827.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SDIR
HOWLWerewolf Therapeutics, Inc.
Filing timeJan 02
Trade dateDec 30, 2025
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$0.64
Pre-filing
1mo ago +104.7%1w ago +42.2%1d ago +42.2%
Returns since
7d +0.0%30d +0.0%90d +48.4%180d -45.3%1y +48.4%

HOWL price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
HOWL since 2026-01-02Filed 245 days ago · 30 days of pre-filing context shaded
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001134657-26-000001
Common Stock
Transaction date
Dec 30, 2025
Filed Jan 02, 2026, 10:32 PM · 3d delay
Shares
34.8k sh
$61 per share
Estimated value
-$2.12M
Computed from shares × price
Holdings after
2.51M sh
Indirect · See Footnotes

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
10b5-1 Detected
-10score
Filing-only score

-10

Compact filing score computed from stored Form 4 facts. Version v1.

Mixed or weak signal

This filing has a negative filing-only score. It may be less informative as an insider-activity signal and needs extra context.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    Transaction effected pursuant to a plan established pursuant to Rule 10b5-1 dated September 24, 2025.

  2. F2

    The shares were sold as follows: 3,728 by MPM Asset Management LLC ("AM LLC"), 23,551 by MPM BioVentures 2014, L.P. ("BV 2014"), 1,571 by MPM BioVentures 2014(B), L.P. ("BV 2014(B)"), 811 by MPM Asset…

  3. F3

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.6085 to $0.63 inclusive. The Reporting Person undertakes to provid…

  4. F4

    MPM BioVentures 2014 GP LLC and MPM BioVentures 2014 LLC ("BV LLC") are the direct and indirect general partners of BV 2014 and BV 2014(B). BV LLC is the manager of AM

  5. BV2014. MPM Oncology Innovations Fund GP LLC ("MPM OIF GP") is the general partner of MPM OIF. Luke Evnin is a member of AM LLC, a Managing Director of BV LLC and a manager of MPM OIF GP. The Reportin…

  6. securities except to the extent of his pecuniary interest therein.

  7. F5

    The shares are held as follows: 269,490 by AM LLC, 1,701,633 by BV 2014, 113,495 by BV 2014(B), 58,568 by AM BV2014 and 372,641 by MPM OIF.

  8. F6

    The shares were sold as follows: 2,670 by AM LLC, 16,870 by BV 2014, 1,125 by BV 2014(B), 582 by AM BV2014 and 3,715 by MPM OIF.

  9. F7

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.6038 to $0.6359 inclusive. The Reporting Person undertakes to prov…

  10. F8

    The shares are held as follows: 266,820 by AM LLC, 1,684,763 by BV 2014, 112,370 by BV 2014(B), 57,986 by AM BV2014 and 368,926 by MPM OIF.

  11. F9

    The shares were sold as follows: 1,986 by AM LLC, 12,549 by BV 2014, 837 by BV 2014(B), 432 by AM BV2014 and 2,764 by MPM OIF.

  12. F10

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.62 to $0.6499 inclusive. The Reporting Person undertakes to provid…

  13. F11

    The shares are held as follows: 264,834 by AM LLC, 1,672,214 by BV 2014, 111,533 by BV 2014(B), 57,554 by AM BV2014 and 366,162 by MPM OIF.

Original filing · 0001134657-26-000001
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