X0202 SCHEDULE 13G/A 0001386060-26-000027 0001386060 XXXXXXXX LIVE 1 American Depository Shares 03/31/2026 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 165051 0 165051 0 165051 N 6.66 IA Per Form 20-F filling for 12/31/25, each ADS is equivalent to .05 Common Shares in the company, so dividing the ADS held 165,051 by 20, we hold 8,252.55 common shares in the company. 20 ADS = 1 Common Share in company. 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 165,051 6.66 Boston Partners - 165,051 Boston Partners - 0 Boston Partners - 165,051 Boston Partners - 0 Y N This Schedule is being filed with respect to 165,051 shares of the American Depository Shares of DoubleDown Interactive Co., Ltd. (American Depository Shares) held by Boston Partners on 06/30/2026 for the discretionary account of certain clients. They represent 8,252.55 common shares in the company. By reason of rule 13d-3 under the act Boston Partners may be deemed to be a beneficial owner of such Common Stock. To the knowledge of Boston Partners no person has the right to receive or the power to direct the receipt of dividends from or the proceeds from the sale of such Common Stock which represents more than 5% of the outstanding shares of the American Depository Shares referred to in item 4(b) hereof. 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 08/04/2026