SCHEDULE 13G/A

Monte Rosa Therapeutics Inc

Common Stock, par value $0.0001 per share · CUSIP: 61225M102

Event date: 2025-12-31

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

• Adam Goulburn

  Shares: 5,663,265 · Class: 8.7%

• Zavain Dar

  Shares: 5,663,265 · Class: 8.7%

• Nan Li

  Shares: 5,663,265 · Class: 8.7%

• Dimension Management, L.P.

  Shares: 5,663,265 · Class: 8.7%

• Dimension Capital I GP, LLC

  Shares: 5,663,265 · Class: 8.7%

• Dimension Management GP, LLC

  Shares: 5,663,265 · Class: 8.7%

• Dimension Capital I, L.P.

  Shares: 5,663,265 · Class: 8.7%

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