Treasury share acquisition: results report

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Treasury Share Acquisition Results Report

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Miwon Specialty Chemical Co., Ltd. Treasury Share Acquisition Results Report To the Governor of the Financial Supervisory Service October 2, 2026

Company name: Miwon Specialty Chemical Co., Ltd. Representative director: Bae Won Head office address: 167 Wanjusandan 1-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do (Phone) 031-479-9140 (Website) http://www.miwonsc.com Preparer: (Title) Head of Management Support Division (Name) Kim Tae-jun (Phone) 031-479-9140

1. Name and address of the issuer a. Name: Miwon Specialty Chemical Co., Ltd. b. Address: 167 Wanjusandan 1-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do

2. Details regarding the acquisition report a. Date of submission of material event report: July 9, 2026 b. Acquisition period: From July 10, 2027 to October 2, 2026 (as stated in the filing)

3. Details of acquisition (Unit: KRW, shares) (Each row: Date; Type; Order quantity; Acquired quantity; Price per share; Total acquisition value; Broker; Broker ID)

2026.07.15; Common shares; 500; 1; 101,200; 101,200; NH Investment & Securities; 00120182 2026.07.16; Common shares; 500; 500; 104,900; 52,450,000; NH Investment & Securities; 00120182 2026.07.20; Common shares; 500; 200; 104,700; 20,940,000; NH Investment & Securities; 00120182 2026.07.21; Common shares; 500; 5; 107,800; 539,000; NH Investment & Securities; 00120182 2026.07.22; Common shares; 500; 500; 112,200; 56,100,000; NH Investment & Securities; 00120182 2026.07.23; Common shares; 500; 500; 113,600; 56,800,000; NH Investment & Securities; 00120182 2026.07.24; Common shares; 500; 500; 114,100; 57,050,000; NH Investment & Securities; 00120182 2026.07.27; Common shares; 500; 500; 113,900; 56,950,000; NH Investment & Securities; 00120182 2026.07.28; Common shares; 500; 500; 115,800; 57,900,000; NH Investment & Securities; 00120182 2026.07.29; Common shares; 500; 500; 120,000; 60,000,000; NH Investment & Securities; 00120182 2026.07.30; Common shares; 500; 500; 119,900; 59,950,000; NH Investment & Securities; 00120182 2026.07.31; Common shares; 500; 500; 119,700; 59,850,000; NH Investment & Securities; 00120182 2026.08.03; Common shares; 500; 500; 120,000; 60,000,000; NH Investment & Securities; 00120182 2026.08.04; Common shares; 500; 500; 124,800; 62,400,000; NH Investment & Securities; 00120182 2026.08.05; Common shares; 500; 500; 122,500; 61,250,000; NH Investment & Securities; 00120182 2026.08.06; Common shares; 500; 500; 115,100; 57,550,000; NH Investment & Securities; 00120182 2026.08.07; Common shares; 500; 500; 115,700; 57,850,000; NH Investment & Securities; 00120182 2026.08.10; Common shares; 500; 500; 115,300; 57,650,000; NH Investment & Securities; 00120182 2026.08.11; Common shares; 500; 5; 118,800; 594,000; NH Investment & Securities; 00120182 2026.08.12; Common shares; 500; 500; 123,100; 61,550,000; NH Investment & Securities; 00120182 2026.08.13; Common shares; 500; 500; 123,300; 61,650,000; NH Investment & Securities; 00120182 2026.08.14; Common shares; 500; 500; 123,400; 61,700,000; NH Investment & Securities; 00120182 2026.08.18; Common shares; 500; 500; 120,100; 60,050,000; NH Investment & Securities; 00120182 2026.08.20; Common shares; 500; 500; 132,500; 66,250,000; NH Investment & Securities; 00120182 2026.08.21; Common shares; 500; 500; 130,500; 65,250,000; NH Investment & Securities; 00120182 2026.08.24; Common shares; 500; 500; 127,600; 63,800,000; NH Investment & Securities; 00120182 2026.08.25; Common shares; 500; 500; 124,000; 62,000,000; NH Investment & Securities; 00120182 2026.08.26; Common shares; 500; 500; 131,400; 65,700,000; NH Investment & Securities; 00120182 2026.08.27; Common shares; 500; 500; 132,900; 66,450,000; NH Investment & Securities; 00120182 2026.08.28; Common shares; 500; 500; 131,100; 65,550,000; NH Investment & Securities; 00120182 2026.08.31; Common shares; 500; 500; 132,500; 66,250,000; NH Investment & Securities; 00120182 2026.09.01; Common shares; 500; 500; 130,300; 65,150,000; NH Investment & Securities; 00120182 2026.09.09; Common shares; 400; 0; 130,700; 0; NH Investment & Securities; 00120182 2026.09.10; Common shares; 300; 300; 133,100; 39,930,000; NH Investment & Securities; 00120182 2026.09.11; Common shares; 300; 300; 133,200; 39,960,000; NH Investment & Securities; 00120182 2026.09.14; Common shares; 300; 300; 133,300; 39,990,000; NH Investment & Securities; 00120182 2026.09.15; Common shares; 300; 300; 133,700; 40,110,000; NH Investment & Securities; 00120182 2026.09.16; Common shares; 300; 300; 134,700; 40,410,000; NH Investment & Securities; 00120182 2026.09.17; Common shares; 300; 300; 134,100; 40,230,000; NH Investment & Securities; 00120182 2026.09.21; Common shares; 300; 300; 135,400; 40,620,000; NH Investment & Securities; 00120182 2026.09.22; Common shares; 200; 200; 134,200; 26,840,000; NH Investment & Securities; 00120182 2026.09.23; Common shares; 200; 200; 132,400; 26,480,000; NH Investment & Securities; 00120182 2026.09.28; Common shares; 200; 200; 130,500; 26,100,000; NH Investment & Securities; 00120182 2026.09.30; Common shares; 200; 200; 133,500; 26,700,000; NH Investment & Securities; 00120182 2026.10.01; Common shares; 207; 207; 130,900; 27,096,300; NH Investment & Securities; 00120182 2026.10.02; Common shares; 1; 1; 132,400; 132,400; NH Investment & Securities; 00120182 Total: -; -; 19,508; 17,319; 123,672; 2,141,872,900; -; -

(1) The above dates are based on settlement date. (2) The "price per share" above is the average unit price, and the "acquisition value" is the amount net of brokerage commissions.

4. Whether the acquisition matches the planned acquisition content

Planned acquisition amount (KRW): Common shares 2,142,000,000; Other shares - Total acquisition value (KRW): Common shares 2,141,872,900; Other shares - Whether below the planned acquisition amount: - Reason, if below plan: Due to share price fluctuations during the acquisition period, there was a difference between the planned number of shares to be acquired (20,000 common shares) and the actual number of shares acquired (17,319 common shares); however, the share acquisition was completed within the planned acquisition amount stated in the material event report.

5. Status of treasury shares held after acquisition [As of October 2, 2026] (Unit: KRW, shares, %)

Type of share: Common shares Holdings under Article 165-3 of the FSCMA (A): Quantity 202,888; Ratio 4.06%; Total value KRW 28,468,618,791 Holdings under trust agreements per Article 165-3 of the FSCMA (B): Quantity -; Ratio -; Contract amount - Total (A+B): Quantity 202,888; Ratio 4.06%; Amount KRW 28,468,618,791

6. Changes in the largest shareholder's shareholding before and after the acquisition [As of October 2, 2026] (Unit: shares)

Name: Miwon Holdings Co., Ltd.; Type of share: Common shares; Shares held at acquisition report date: 1,697,000; Shares held at acquisition end date: 1,697,000; Reason for change: - Total: Common shares 1,697,000 / 1,697,000 (no change); Other shares -; Combined total 1,697,000 / 1,697,000 (no change)