SCHEDULE 13G/A

N/A

Common Stock, par value $0.0001 per share · CUSIP: 92673K108

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: 2,538,417.00 · Class: 5.4%

• BVF I GP LLC

  Shares: 2,538,417.00 · Class: 5.4%

• BIOTECHNOLOGY VALUE FUND II LP

  Shares: 1,901,040.00 · Class: 4.1%

• BVF II GP LLC

  Shares: 1,901,040.00 · Class: 4.1%

• Biotechnology Value Trading Fund OS LP

  Shares: 213,005.00 · Class: 0.5%

• BVF Partners OS Ltd.

  Shares: 213,005.00 · Class: 0.5%

• BVF GP HOLDINGS LLC

  Shares: 4,439,457.00 · Class: 9.4%

• BVF PARTNERS L P/IL

  Shares: 4,734,500.00 · Class: 9.99%

• BVF INC/IL

  Shares: 4,734,500.00 · Class: 9.99%

• LAMPERT MARK N

  Shares: 4,734,500.00 · Class: 9.99%

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