SCHEDULE 13G/A

4D Molecular Therapeutics Inc

Common Stock, par value $0.0001 per share · CUSIP: 35104E100

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: 2,331,627.00 · Class: 5.0%

• BVF I GP LLC

  Shares: 2,331,627.00 · Class: 5.0%

• BIOTECHNOLOGY VALUE FUND II LP

  Shares: 1,902,682.00 · Class: 4.1%

• BVF II GP LLC

  Shares: 1,902,682.00 · Class: 4.1%

• Biotechnology Value Trading Fund OS LP

  Shares: 299,876.00 · Class: 0.6%

• BVF Partners OS Ltd.

  Shares: 299,876.00 · Class: 0.6%

• BVF GP HOLDINGS LLC

  Shares: 4,234,309.00 · Class: 9.1%

• BVF PARTNERS L P/IL

  Shares: 4,632,749.00 · Class: 9.99%

• BVF INC/IL

  Shares: 4,632,749.00 · Class: 9.99%

• LAMPERT MARK N

  Shares: 4,632,749.00 · Class: 9.99%

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