SCHEDULE 13D/A

WEREWOLF THERAPEUTICS INC

Common Stock · CUSIP: 95075A107

Event date: 2025-10-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• MPM BioVentures 2014, L.P.Reported CIK 0001609492

  Shares: 2,666,424.00 · Class: 5.8%

• MPM BioVentures 2014 (B), L.P.Reported CIK 0001609493

  Shares: 177,846.00 · Class: 0.4%

• MPM Asset Management Investors BV2014 LLCReported CIK 0001609495

  Shares: 91,778.00 · Class: 0.2%

• UBS Oncology Impact Fund L.P.Reported CIK 0001691428

  Shares: 2,204,251.00 · Class: 4.8%

• MPM BioVentures 2014 GP LLCReported CIK 0001765091

  Shares: 2,844,270.00 · Class: 6.2%

• MPM BioVentures 2014 LLCReported CIK 0001765021

  Shares: 2,936,048.00 · Class: 6.4%

• Oncology Impact Fund (Cayman) Management L.P.Reported CIK 0001721036

  Shares: 2,204,251.00 · Class: 4.8%

• MPM BioImpact LLCReported CIK 0001687078

  Shares: 2,204,251.00 · Class: 4.8%

• ANSBERT GADICKEReported CIK 0001134655

  Shares: 6,147,610.00 · Class: 13.4%

• LUKE EVNINReported CIK 0001134657

  Shares: 3,943,359.00 · Class: 8.6%

• Todd FoleyReported CIK 0001473930

  Shares: 2,936,048.00 · Class: 6.4%

• MPM ASSET MANAGEMENT LLCReported CIK 0001263048

  Shares: 422,201.00 · Class: 0.9%

• MPM ONCOLOGY INNOVATIONS FUND LPReported CIK 0001719960

  Shares: 585,110.00 · Class: 1.3%

• MPM Oncology Innovations Fund GP LLCReported CIK 0001857903

  Shares: 585,110.00 · Class: 1.3%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.