SCHEDULE 13G

ALX Oncology Holdings, Inc.

Common Stock, par value $0.001 per share · CUSIP: 00166B105

Event date: 2026-01-30

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

• TCG Crossover GP II, LLC

  Shares: 6,505,925 · Class: 5.0%

• TCG Crossover Fund II, L.P.

  Shares: 6,505,925 · Class: 5.0%

• TCG Crossover GP III, LLC

  Shares: 6,505,924 · Class: 5.0%

• TCG Crossover Fund III, L.P.

  Shares: 6,505,924 · Class: 5.0%

• Chen Yu

  Shares: 13,011,849 · Class: 9.9%

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