SCHEDULE 13G

1RT ACQUISITION CORP.

Class A ordinary shares, par value $0.0001 per share · CUSIP: G6757R105

Event date: 2026-03-05

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: 973,096 · Class: 5.6%

• Linden GP LLC

  Shares: 973,096 · Class: 5.6%

• Linden Advisors LP

  Shares: 1,010,100 · Class: 5.9%

• Siu Min Wong

  Shares: 1,010,100 · Class: 5.9%

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