SCHEDULE 13G/A

DoubleDown Interactive Co Ltd

Common Shares, par value KRW10,000 per share · CUSIP: 25862B109

Event date: 2025-12-18

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

• STIC Special Situation Diamond Ltd.

  Shares: 94,109.35 · Class: 3.8%

• STIC Special Situation Private Equity Fund

  Shares: 94,109.35 · Class: 3.8%

• STIC Investments, Inc.

  Shares: 94,109.35 · Class: 3.8%

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