SCHEDULE 13G/A

Monte Rosa Therapeutics Inc

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

Event date: 2025-03-31

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

• BIOTECHNOLOGY VALUE FUND L P

  Shares: 2,909,511.00 · Class: 4.7%

• BVF I GP LLC

  Shares: 2,909,511.00 · Class: 4.7%

• BIOTECHNOLOGY VALUE FUND II LP

  Shares: 2,347,693.00 · Class: 3.8%

• BVF II GP LLC

  Shares: 2,347,693.00 · Class: 3.8%

• Biotechnology Value Trading Fund OS LP

  Shares: 293,594.00 · Class: 0.5%

• BVF Partners OS Ltd.

  Shares: 293,594.00 · Class: 0.5%

• BVF GP HOLDINGS LLC

  Shares: 5,257,204.00 · Class: 8.5%

• BVF PARTNERS L P/IL

  Shares: 5,660,132.00 · Class: 9.2%

• BVF INC/IL

  Shares: 5,660,132.00 · Class: 9.2%

• LAMPERT MARK N

  Shares: 5,660,132.00 · Class: 9.2%

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