SCHEDULE 13D/A

WEREWOLF THERAPEUTICS INC

Common Stock · CUSIP: 95075A107

Event date: 2025-12-01

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: 2,111,105.00 · Class: 4.3%

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

  Shares: 140,807.00 · Class: 0.3%

• MPM Asset Management Investors BV2014 LLCReported CIK 0001609495

  Shares: 72,664.00 · Class: 0.1%

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

  Shares: 1,745,647.00 · Class: 3.6%

• MPM BioVentures 2014 GP LLCReported CIK 0001765091

  Shares: 2,251,912.00 · Class: 4.6%

• MPM BioVentures 2014 LLCReported CIK 0001765021

  Shares: 2,324,576.00 · Class: 4.8%

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

  Shares: 1,745,647.00 · Class: 3.6%

• MPM BioImpact LLCReported CIK 0001687078

  Shares: 1,745,647.00 · Class: 3.6%

• ANSBERT GADICKEReported CIK 0001134655

  Shares: 4,867,341.00 · Class: 10.0%

• LUKE EVNINReported CIK 0001134657

  Shares: 3,121,694.00 · Class: 6.4%

• Todd FoleyReported CIK 0001473930

  Shares: 2,324,576.00 · Class: 4.8%

• MPM ASSET MANAGEMENT LLCReported CIK 0001263048

  Shares: 334,302.00 · Class: 0.7%

• MPM ONCOLOGY INNOVATIONS FUND LPReported CIK 0001719960

  Shares: 462,816.00 · Class: 1.0%

• MPM Oncology Innovations Fund GP LLCReported CIK 0001857903

  Shares: 462,816.00 · Class: 1.0%

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