SCHEDULE 13G

Sutro Biopharma, Inc.

Common Stock, $0.001 par value · CUSIP: 869367201

Event date: 2026-02-10

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: 668,693.00 · Class: 4.1%

• BVF I GP LLC

  Shares: 668,693.00 · Class: 4.1%

• BIOTECHNOLOGY VALUE FUND II LP

  Shares: 488,916.00 · Class: 3.0%

• BVF II GP LLC

  Shares: 488,916.00 · Class: 3.0%

• Biotechnology Value Trading Fund OS LP

  Shares: 75,359.00 · Class: 0.5%

• BVF Partners OS Ltd.

  Shares: 75,359.00 · Class: 0.5%

• BVF GP HOLDINGS LLC

  Shares: 1,157,609.00 · Class: 7.0%

• BVF PARTNERS L P/IL

  Shares: 1,251,788.00 · Class: 7.6%

• BVF INC/IL

  Shares: 1,251,788.00 · Class: 7.6%

• LAMPERT MARK N

  Shares: 1,251,788.00 · Class: 7.6%

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