X0202 SCHEDULE 13G/A 0001386060-26-000027 0001386060 XXXXXXXX LIVE 3 American Depositary Shares, each twenty (20) ADSs representing one (1) Common Share 09/30/2026 0001799567 DoubleDown Interactive Co., Ltd. 25862B109 13F, GANGNAM FINANCE CENTER 152, TEHERAN-RO GANGNAM-GU SEOUL M5 unknown Rule 13d-1(b) Boston Partners DE 13090.3 0 13090.3 0 13090.3 N 0.53 IA Boston Partners' amounts and percentages are stated in Common Shares. Per the issuer's Form 20-F for the fiscal year ended December 31, 2025, each twenty (20) American Depositary Shares ("ADSs") represent one (1) Common Share, and 2,477,672 Common Shares were outstanding as of December 31, 2025. As of 09/30/2026, Boston Partners held 261,806 ADSs / 20 = 13,090.30 Common Shares; 13,090.30 / 2,477,672 = 0.53%. This amendment also corrects prior filings, which stated holdings in ADSs and calculated the percentage by dividing ADSs by Common Shares outstanding. Corrected on a consistent basis: as of 03/31/2026, Boston Partners held 133,719 ADSs / 20 = 6,685.95 Common Shares; 6,685.95 / 2,477,672 = 0.27% (previously reported as 5.40%); as of 06/30/2026, Boston Partners held 165,051 ADSs / 20 = 8,252.55 Common Shares; 8,252.55 / 2,477,672 = 0.33% (previously reported as 6.66%). DoubleDown Interactive Co., Ltd. 13F, GANGNAM FINANCE CENTER, 152, TEHERAN-RO GANGNAM-GU, SEOUL, KOREA, REPUBLIC OF unknown Boston Partners ONE BEACON STREET 30TH FLOOR BOSTON, Massachusetts 02108 Boston Partners - DELAWARE N IA 13,090.3 0.53 Boston Partners - 13,090.3 Boston Partners - 0 Boston Partners - 13,090.3 Boston Partners - 0 N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Boston Partners /s/ Ali Farooqi 11/06/2026