SCHEDULE 13G/A

CytomX Therapeutics Inc

Common Stock, par value $0.00001 per share · CUSIP: 23284F105

Event date: 2025-06-30

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

• TANG CAPITAL MANAGEMENT, LLC

  Shares: 11,065,662.00 · Class: 7.0%

• KEVIN TANG

  Shares: 11,065,662.00 · Class: 7.0%

• TANG CAPITAL PARTNERS, LP

  Shares: 7,409,997.00 · Class: 4.7%

• TANG CAPITAL PARTNERS INTERNATIONAL, LP

  Shares: 3,655,665.00 · Class: 2.3%

• TANG CAPITAL PARTNERS III, INC

  Shares: 0.00 · Class: 0.0%

• TANG CAPITAL PARTNERS IV, INC

  Shares: 0.00 · Class: 0.0%

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