SCHEDULE 13G

ALT5 Sigma Corp

Common Stock, $0.001 par value per share · CUSIP: 47089W104

Event date: 2025-08-12

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

• JANE STREET GROUP, LLC

  Shares: 10,061,351.00 · Class: 8.2%

• Jane Street Capital, LLC

  Shares: 46,597.00 · Class: 0.0%

• Jane Street Options, LLC

  Shares: 13,300.00 · Class: 0.0%

• Jane Street Global Trading, LLC

  Shares: 10,001,454.00 · Class: 8.2%

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