Material event report (treasury share acquisition) (subsidiary)

What happened

Miwon Specialty Chemical Co., Ltd. / Material Event Report / Exchange Reporting Obligation Matter, material event report of the subsidiary Miwon Specialty Chemical Co., Ltd. To the Financial Services Commission / Korea Exchange, July 9, 2026 Company name: Miwon Specialty Chemical Co., Ltd. CEO: Bae Won Head office address: 167 Wanju Industrial Complex 1-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do (Phone) 031-479-9140 (Website) http://www.miwonsc.com Preparer in charge: (Title) Executive Director (Name) Kim Tae-jun (Phone) 031-479-9140

Decision on Treasury Share Acquisition

1. Planned number of shares to acquire: common shares 20,000; other shares 0 2. Planned acquisition amount (KRW): common shares 2,142,000,000; other shares 0 3. Expected acquisition period: start date July 10, 2026; end date October 9, 2026 4. Expected holding period: start date,; end date 5. Purpose of acquisition: stabilizing the share price and enhancing shareholder value 6. Method of acquisition: on-market purchase via the securities market 7. Brokerage firm: NH Investment & Securities 8. Treasury shares held before the acquisition: common shares acquired within distributable profit 185,569 (3.7%); other shares,; other acquisitions 9. Decision date: July 9, 2026 (outside directors present: 3, absent: 0; audit committee member attendance: ) 10. Daily purchase order quantity limit: common shares 2,000; other shares 11. Other matters for reference in investment decisions - The planned acquisition amount in item 2 is the closing price on the business day before the board resolution multiplied by the planned number of shares; the actual acquisition amount may change with future share-price movements. - Regarding item 9, all of the company's audit committee members are outside directors. - The daily purchase order quantity limit in item 10 is 2,000 shares, the smaller of [the greater of ① and ②] and ③: ① 10% of the shares applied for = 2,000 shares; ② 25% of the one-month average daily trading volume as of the business day before the board resolution = 1,104 shares; ③ 1% of total issued shares = 50,000 shares.

[Treasury share acquisition amount limit] Item | Amount 1. Distributable profit limit under the Commercial Act as of the end of the previous fiscal year a. Net assets: 453,561,216,735 b. Capital stock: 2,633,945,500 c. Capital reserves and earned reserves accumulated through the previous fiscal year: 172,471,256,839 d. Unrealized gains as prescribed by presidential decree: 3,825,478,332 Subtotal (a-b-c-d): 274,630,536,064 2. Treasury share acquisition amount since the end of the previous fiscal year: 1,573,353,020 3. Dividend amount resolved at the regular general meeting since the end of the previous fiscal year, and the related earned reserve: 10,591,748,200 4. Quarterly/interim dividend amount resolved by the board since the end of the previous fiscal year, and the related earned reserve: 5,777,317,200 5. Trust contract amount: 0 6. Acquisition cost of treasury shares disposed of since the end of the previous fiscal year (moving-average method): 0 Treasury share acquisition amount limit (1-2-3-4-5+6): 256,688,117,644

7. Other matters for reference in investment decisions - The treasury share acquisition amount in item 2 above (since the end of the previous fiscal year) includes fees paid on the acquisition. - The quarterly/interim dividend amount in item 4 above (since the end of the previous fiscal year) reflects the cash/in-kind dividend decision the company resolved for its quarterly dividend on July 9, 2026.

[Treasury share holdings before the treasury share acquisition decision] (Unit: shares) Method of acquisition | Type of share | Opening quantity | Increase (+) | Decrease, disposal (-) | Decrease, retirement (-) | Closing quantity | Note On-market direct purchase within distributable profit, common shares: opening 174,000; increase 11,569; disposal 0; retirement 0; closing 185,569 Off-market direct purchase, common shares: all Tender offer, common shares: all Subtotal (a), common shares: opening 174,000; increase 11,569; disposal 0; retirement 0; closing 185,569 Trust-contract holdings (trustee-held and in-kind), common shares: all Subtotal (b), common shares: all Other acquisition (c), common shares: all Total (a+b+c), common shares: opening 174,000; increase 11,569; disposal 0; retirement 0; closing 185,569 (No other-class shares held.)