Treasury share acquisition: results report

What happened

Treasury share acquisition: results report DMS Co., Ltd. To the Governor of the Financial Supervisory Service August 31, 2026 Company name: DMS Co., Ltd. CEO: Lee Sang-jin, Jeong Su-hwa Head office address: 6th floor, 120 Heungdeok jungang-ro, Giheung-gu, Yongin-si, Gyeonggi-do (Yeongdeok-dong, Heungdeok IT Valley U-tower) Phone: 031-8031-1133; Website: http://www.dms21.co.kr Person responsible for preparation: (Title) Senior Managing Director, (Name) Lee Sang-jun, Phone: 031-8031-1133

1. Name and address of the issuer a. Name: DMS Co., Ltd. b. Address: 6th floor, 120 Heungdeok jungang-ro, Giheung-gu, Yongin-si, Gyeonggi-do (Yeongdeok-dong, Heungdeok IT Valley U-tower)

2. Details of the acquisition report a. Date the material event report was filed: July 20, 2026 b. Acquisition period: from July 21, 2026 to October 19, 2026

3. Details of acquisition (unit: KRW, shares) Date | Type | Quantity (order / acquired) | Price per share | Total acquisition price | Brokerage firm | Financial investment business operator ID July 21, 2026 | Common stock | 50,000 / 50,000 | 8,316 | 415,795,685 | KB Securities | 00164876 July 22, 2026 | Common stock | 50,000 / 50,000 | 8,556 | 427,813,380 | KB Securities | 00164876 July 24, 2026 | Common stock | 100,000 / 100,000 | 8,095 | 809,516,240 | KB Securities | 00164876 July 28, 2026 | Common stock | 100,000 / 100,000 | 7,375 | 737,495,380 | KB Securities | 00164876 July 29, 2026 | Common stock | 100,000 / 100,000 | 7,506 | 750,556,630 | KB Securities | 00164876 July 30, 2026 | Common stock | 50,000 / 50,000 | 7,784 | 389,185,140 | KB Securities | 00164876 July 31, 2026 | Common stock | 100,000 / 100,000 | 8,134 | 813,356,850 | KB Securities | 00164876 August 3, 2026 | Common stock | 50,000 / 50,000 | 8,204 | 410,180,040 | KB Securities | 00164876 August 4, 2026 | Common stock | 40,000 / 40,000 | 8,144 | 325,741,300 | KB Securities | 00164876 August 5, 2026 | Common stock | 40,000 / 40,000 | 8,079 | 323,146,890 | KB Securities | 00164876 August 6, 2026 | Common stock | 80,000 / 80,000 | 8,333 | 666,617,780 | KB Securities | 00164876 August 7, 2026 | Common stock | 40,000 / 40,000 | 8,143 | 325,700,720 | KB Securities | 00164876 August 10, 2026 | Common stock | 40,000 / 40,000 | 8,086 | 323,421,000 | KB Securities | 00164876 August 11, 2026 | Common stock | 40,000 / 40,000 | 8,181 | 327,255,630 | KB Securities | 00164876 August 12, 2026 | Common stock | 40,000 / 40,000 | 7,892 | 315,698,380 | KB Securities | 00164876 August 13, 2026 | Common stock | 40,000 / 40,000 | 7,465 | 298,619,010 | KB Securities | 00164876 August 14, 2026 | Common stock | 40,000 / 40,000 | 7,459 | 298,367,175 | KB Securities | 00164876 August 18, 2026 | Common stock | 40,000 / 40,000 | 7,415 | 296,581,535 | KB Securities | 00164876 August 19, 2026 | Common stock | 40,000 / 40,000 | 7,423 | 296,902,990 | KB Securities | 00164876 August 20, 2026 | Common stock | 40,000 / 40,000 | 7,673 | 306,928,690 | KB Securities | 00164876 August 21, 2025 (as stated in the filing) | Common stock | 40,000 / 40,000 | 7,565 | 301,378,490 | KB Securities | 00164876 August 24, 2026 | Common stock | 40,000 / 40,000 | 7,660 | 306,392,790 | KB Securities | 00164876 August 25, 2026 | Common stock | 40,000 / 40,000 | 7,568 | 302,724,470 | KB Securities | 00164876 August 26, 2026 | Common stock | 43,269 / 30,526 | 7,555 | 230,617,400 | KB Securities | 00164876 Total | - | 1,283,269 / 1,270,526 | 7,871 (average) | 9,999,993,595 | - | - Note: The above "date" is the trade execution date, and the "price per share" and "total acquisition price" do not include brokerage fees.

4. Whether the planned acquisition matches the actual acquisition Planned acquisition amount (KRW): Common stock 10,000,000,000; Other stock - Total acquisition price (KRW): Common stock 9,999,993,595; Other stock - Whether the planned amount was not reached: No Reason, if shortfall occurred: - The Company acquired treasury shares as close as possible to the planned acquisition amount stated in its material event report. The difference between the planned acquisition amount and the actual total acquisition price is less than the price of one share.

5. Status of treasury shares held after acquisition [as of August 31, 2026] (unit: KRW, shares, %) Share type: Common stock Holdings under Article 165-3 of the Act (A): 1,270,526 shares; 5.72%; total value 9,999,993,595 Holdings under trust contracts per Article 165-3 of the Act (B): -; -; - Total (A+B): 1,270,526 shares; 5.72%; 9,999,993,595 Total (all share types): 1,270,526 shares; 5.72%; 9,999,993,595

6. Changes in the largest shareholder's holdings before and after the acquisition [as of August 31, 2026] (unit: shares) Name: Park Yong-seok Share type: Common stock Holding at acquisition report date: 5,485,000 Holding at acquisition end date: 5,485,000 Reason for change: - Total common stock: 5,485,000 / 5,485,000; other stock: -/-; grand total: 5,485,000 / 5,485,000; reason for change: -