MPM BioVentures 2014, L.P. - Dec 1, 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
48.7M shares
Disclosed Ownership
4.87M shares
Ownership
10%
Form type
SCHEDULE 13D/A
Date filed
12/3/2025, 07:04 PM
Date of event
Dec 1, 2025
Previous filing
Nov 17, 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. 4.3% 2.11M 2.11M 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. 0.3% 141K 141K 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% 72.7K 72.7K 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. 3.6% 1.75M 1.75M 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 4.6% 2.25M 0 2.25M /s/ Ansbert Gadicke Managing Director of MPM BioVentures 2014 LLC, the Managing Member of MPM BioVentures 2014 GP LLC 0001765091
MPM BioVentures 2014 LLC 4.8% 2.32M 0 2.32M /s/ Ansbert Gadicke Managing Director 0001765021
Oncology Impact Fund (Cayman) Management L.P. 3.6% 1.75M 0 1.75M /s/ Ansbert Gadicke Managing Partner of MPM BioImpact LLC, the General Partner of Oncology Impact Fund (Cayman) Management L.P. 0001721036
MPM BioImpact LLC 3.6% 1.75M 0 1.75M /s/ Ansbert Gadicke Managing Partner 0001687078
ANSBERT GADICKE 10% 4.87M 0 4.87M /s/ Ansbert Gadicke Ansbert Gadicke 0001134655
LUKE EVNIN 6.4% 3.12M 0 3.12M /s/ Luke Evnin Luke Evnin 0001134657
Todd Foley 4.8% 2.32M 0 2.32M /s/ Todd Foley Todd Foley 0001473930
MPM ASSET MANAGEMENT LLC 0.7% 334K 334K 0 /s/ Ansbert Gadicke Member 0001263048
MPM ONCOLOGY INNOVATIONS FUND LP 1% 463K 463K 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 1% 463K 0 463K /s/ Ansbert Gadicke Manager 0001857903