SCHEDULE 13D/A

Rubico Inc.

Common Stock, par value $0.01 per share · CUSIP: Y1250N107

Event date: 2025-10-15

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

• Family Trading Inc.Reported CIK 0001786648

  Shares: 1,465,359.00 · Class: 45.75%

• 3 Sororibus Trust

  Shares: 1,465,359.00 · Class: 45.75%

• Evangelos J. Pistiolis

  Shares: 220,564.00 · Class: 6.89%

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