MPM BioVentures 2014, L.P. - 22 Dec 2025 SCHEDULE 13D/A Report for WEREWOLF THERAPEUTICS, INC. Common Stock (HOWL)

Filing Manager
MPM BioVentures 2014, L.P.
Reporting Manager
ANSBERT GADICKE
Security
WEREWOLF THERAPEUTICS, INC. Common Stock
Symbol
HOWL
Shares outstanding
48,507,463 shares
Disclosed Ownership
3,977,612 shares
Ownership
8.2%
Form type
SCHEDULE 13D/A
Filing time
29 Dec 2025, 18:59:21 UTC
Date of event
22 Dec 2025
Previous filing
03 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. 3.6% 1,725,184 1,725,184 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% 115,066 115,066 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% 59,379 59,379 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. 2.9% 1,426,938 1,426,938 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 3.8% 1,840,250 0 1,840,250 /s/ Ansbert Gadicke Managing Director of MPM BioVentures 2014 LLC, the Managing Member of MPM BioVentures 2014 GP LLC 0001765091
MPM BioVentures 2014 LLC 3.9% 1,899,629 0 1,899,629 /s/ Ansbert Gadicke Managing Director 0001765021
Oncology Impact Fund (Cayman) Management L.P. 2.9% 1,426,938 0 1,426,938 /s/ Ansbert Gadicke Managing Partner of MPM BioImpact LLC, the General Partner of Oncology Impact Fund (Cayman) Management L.P. 0001721036
MPM BioImpact LLC 2.9% 1,426,938 0 1,426,938 /s/ Ansbert Gadicke Managing Partner 0001687078
ANSBERT GADICKE 8.2% 3,977,612 0 3,977,612 /s/ Ansbert Gadicke Ansbert Gadicke 0001134655
LUKE EVNIN 5.3% 2,550,674 0 2,550,674 /s/ Luke Evnin Luke Evnin 0001134657
Todd Foley 3.9% 1,899,629 0 1,899,629 /s/ Todd Foley Todd Foley 0001473930
MPM ASSET MANAGEMENT LLC 0.6% 273,218 273,218 0 /s/ Ansbert Gadicke Member 0001263048
MPM ONCOLOGY INNOVATIONS FUND LP 0.8% 377,827 377,827 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 0.8% 377,827 0 377,827 /s/ Ansbert Gadicke Manager 0001857903