SCHEDULE 13G

COLUMBUS ACQUISITION CORP

Ordinary shares, par value $0.0001 per share · CUSIP: G2295P107

Event date: 2025-11-10

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

• Linden Capital L.P.

  Shares: 576,225 · Class: 7.3%

• Linden GP LLC

  Shares: 576,225 · Class: 7.3%

• Linden Advisors LP

  Shares: 600,000 · Class: 7.6%

• Siu Min Wong

  Shares: 600,000 · Class: 7.6%

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