SCHEDULE 13D/A

HILLEVAX INC

Common Stock, par value $0.0001 per share · CUSIP: 43157M102

Event date: 2025-09-17

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, LLCReported CIK 0001232621

  Shares: 0.00 · Class: 0%

• KEVIN TANGReported CIK 0001178579

  Shares: 0.00 · Class: 0%

• TANG CAPITAL PARTNERS, LPReported CIK 0001191935

  Shares: 0.00 · Class: 0%

• TANG CAPITAL PARTNERS INTERNATIONAL, LPReported CIK 0002064011

  Shares: 0.00 · Class: 0%

• TANG CAPITAL PARTNERS III, INCReported CIK 0002036763

  Shares: 0.00 · Class: 0%

• TANG CAPITAL PARTNERS IV, INCReported CIK 0002036770

  Shares: 0.00 · Class: 0%

• CONCENTRA BIOSCIENCES, LLCReported CIK 0001970065

  Shares: 0.00 · Class: 0%

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