L.P. MPM BioVentures 2014 - 14 Jan 2026 SCHEDULE 13D/A Report for WEREWOLF THERAPEUTICS, INC. Common Stock (HOWL)

Filing Manager
L.P. MPM BioVentures 2014
Reporting Manager
ANSBERT GADICKE
Security
WEREWOLF THERAPEUTICS, INC. Common Stock
Symbol
HOWL
Shares outstanding
48,821,304 shares
Disclosed Ownership
3,368,670 shares
Ownership
6.9%
Form type
SCHEDULE 13D/A
Filing time
16 Jan 2026, 17:36:28 UTC
Date of event
14 Jan 2026
Previous filing
29 Dec 2025
SEC
View on sec.gov

Reporting Managers (14)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
MPM BioVentures 2014, L.P. 3% 1,461,054 1,461,054 0 /s/ Ansbert Gadicke Managing Director of MPM BioVentures 2014 LLC, the Managing Member of MPM BioVentures 2014 GP LLC, the General Partner of MPM BioVentures 2014, L.P. 0001609492
MPM BioVentures 2014 (B), L.P. 0.2% 97,450 97,450 0 /s/ Ansbert Gadicke Managing Director of MPM BioVentures 2014 LLC, Managing Member of MPM BioVentures 2014 GP LLC, the General Partner of MPM BioVentures 2014 (B), L.P. 0001609493
MPM Asset Management Investors BV2014 LLC 0.1% 50,289 50,289 0 /s/ Ansbert Gadicke Managing Director of MPM BioVentures 2014 LLC, the manager of MPM Asset Management Investors BV2014 LLC 0001609495
UBS Oncology Impact Fund L.P. 2.5% 1,208,810 1,208,810 0 /s/ Ansbert Gadicke Managing Partner of MPM BioImpact LLC, the GP of Oncology Impact Fund (Cayman) Management L.P., the GP of UBS Oncology Impact Fund L.P. 0001691428
MPM BioVentures 2014 GP LLC 3.2% 1,558,504 0 1,558,504 /s/ Ansbert Gadicke Managing Director of MPM BioVentures 2014 LLC, the Managing Member of MPM BioVentures 2014 GP LLC 0001765091
MPM BioVentures 2014 LLC 3.3% 1,608,793 0 1,608,793 /s/ Ansbert Gadicke Managing Director 0001765021
Oncology Impact Fund (Cayman) Management L.P. 2.5% 1,208,810 0 1,208,810 /s/ Ansbert Gadicke Managing Partner of MPM BioImpact LLC, the General Partner of Oncology Impact Fund (Cayman) Management L.P. 0001721036
MPM BioImpact LLC 2.5% 1,208,810 0 1,208,810 /s/ Ansbert Gadicke Managing Partner 0001687078
ANSBERT GADICKE 6.9% 3,368,670 0 3,368,670 /s/ Ansbert Gadicke Ansbert Gadicke 0001134655
LUKE EVNIN 4.4% 2,159,860 0 2,159,860 /s/ Luke Evnin Luke Evnin 0001134657
Todd Foley 3.3% 1,608,793 0 1,608,793 /s/ Todd Foley Todd Foley 0001473930
MPM ASSET MANAGEMENT LLC 0.5% 231,408 231,408 0 /s/ Ansbert Gadicke Member 0001263048
MPM ONCOLOGY INNOVATIONS FUND LP 0.7% 319,659 319,659 0 /s/ Ansbert Gadicke Manager of MPM Oncology Innovations Fund GP LLC, the General Partner of MPM Oncology Innovations Fund, L.P. 0001719960
MPM Oncology Innovations Fund GP LLC 0.7% 319,659 0 319,659 /s/ Ansbert Gadicke Manager 0001857903