Treasury share acquisition: results report

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YMT / Treasury Share Acquisition: Results Report

Treasury Share Acquisition: Results Report To the Governor of the Financial Supervisory Service August 31, 2026

Company name: YMT Co., Ltd. Representative directors: Jeon Seong-wook, Kim Gyun-rok Head office address: 111 Songdomirae-ro, Yeonsu-gu, Incheon (Telephone) 032-821-8277 (Website) http://www.ymtechnology.com Preparer: (Title) Head of Support Office (Name) Lee Hak-mu (Telephone) 032-821-8277

1. Name and address of the issuer (a) Name: YMT Co., Ltd. (b) Address: 111 Songdomirae-ro, Yeonsu-gu, Incheon

2. Details of the acquisition report (a) Material event report filing date: August 14, 2026 (b) Acquisition period: From August 20, 2026 to August 27, 2026

3. Acquisition details (Unit: KRW, shares) Date: 2026-08-20, Type: Common shares; Order quantity: 12,700; Acquired quantity: 9,916; Price per share: 7,880; Total acquisition amount: 78,138,620; Brokerage: Mirae Asset Securities; Financial investment business ID: 00111722 Date: 2026-08-21, Type: Common shares; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,504; Total acquisition amount: 75,043,330; Brokerage: Mirae Asset Securities; Financial investment business ID: 00111722 Date: 2026-08-24, Type: Common shares; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,464; Total acquisition amount: 74,645,040; Brokerage: Mirae Asset Securities; Financial investment business ID: 00111722 Date: 2026-08-25, Type: Common shares; Order quantity: 10,000; Acquired quantity: 7,865; Price per share: 7,611; Total acquisition amount: 59,862,130; Brokerage: Mirae Asset Securities; Financial investment business ID: 00111722 Date: 2026-08-26, Type: Common shares; Order quantity: 10,000; Acquired quantity: 7,906; Price per share: 7,862; Total acquisition amount: 62,157,020; Brokerage: Mirae Asset Securities; Financial investment business ID: 00111722 Date: 2026-08-27, Type: Common shares; Order quantity: 13,325; Acquired quantity: 10,682; Price per share: 8,336; Total acquisition amount: 89,047,900; Brokerage: Mirae Asset Securities; Financial investment business ID: 00111722 Total, Order quantity: 66,025; Acquired quantity: 56,369; Average price per share: 7,786; Total acquisition amount: 438,894,040

* The above dates are order dates. The price per share is the average unit price. The acquisition amount excludes brokerage commission.

4. Consistency between planned and actual acquisition Planned acquisition amount (KRW): Common shares: 500,000,000; Other-class shares: - Total actual acquisition amount (KRW): Common shares: 438,894,040; Other-class shares: - Whether the planned amount was not reached: - Reason if shortfall occurred: Not applicable * The Company completed the treasury share acquisition disclosed in its Material Event Report (Treasury Share Acquisition Decision); because the share price fell during the acquisition period relative to the closing price on the business day before the board resolution date (August 13, 2026), a difference arose between the planned acquisition amount and the actual total acquisition amount.

5. Treasury share holdings after the acquisition [as of August 31, 2026] (Unit: KRW, shares, %) Holdings under Article 165-3 (A): Common shares, quantity: 56,369; ratio: 0.31; total value: 441,043,035 Holdings under trust contracts per Article 165-3 (B): Common shares, quantity: -; ratio: -; contract amount: - Total (A+B): Common shares, quantity: 56,369; ratio: 0.31; amount: 441,043,035 Note 1: The "ratio" above is the percentage of treasury shares relative to the total common shares issued (18,013,213 shares) as of the filing date. Note 2: "Total value" and "amount" above are book values including brokerage commission.

6. Changes in the largest shareholder's shareholding before and after the acquisition [as of August 31, 2026] (Unit: shares) Name: Jeon Seong-wook, Type: Common shares; Before: 5,173.577; After: 5,173.577; Reason for change: - Total: Common shares, Before: 5,173.577; After: 5,173.577 Grand total: 5,173.577 (before and after), Reason for change: -