Treasury share acquisition: results report

What happened

Treasury Share Acquisition: Results Report 6.0 MH Ethanol Co., Ltd.

To: Governor of the Financial Supervisory Service Date: July 20, 2026 Company name: MH Ethanol Co., Ltd. Representative directors: Choi Dong-ho, Kim Il-hwan Head office address: 25 Gwangryeocheonnam-ro, Naeseo-eup, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do Phone: 055-231-0701 Website: http://www.mhethanol.com Preparer: Executive Director Kwon Kyung-rok, Phone: 055-231-0701

1. Name and address of the issuer (a) Name: MH Ethanol Co., Ltd. (b) Address: 25 Gwangryeocheonnam-ro, Naeseo-eup, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do

2. Matters concerning the acquisition report (a) Material event report filing date: June 25, 2026 (b) Acquisition period: June 30, 2026 to July 20, 2026 (settlement-date basis)

3. Acquisition details (Unit: KRW, shares; all through BNK Investment & Securities, ID 00251400) 2026-06-30: order 13,000; acquired 12,500; price 4,095; amount 51,187,705 2026-07-01: order 11,000; acquired 11,000; price 4,308; amount 47,393,355 2026-07-02: order 11,000; acquired 11,000; price 4,341; amount 47,756,830 2026-07-03: order 11,000; acquired 11,000; price 4,374; amount 48,120,565 2026-07-06: order 11,000; acquired 11,000; price 4,465; amount 49,122,115 2026-07-07: order 11,000; acquired 11,000; price 4,515; amount 49,671,100 2026-07-08: order 11,000; acquired 11,000; price 4,591; amount 50,504,085 2026-07-10: order 11,000; acquired 11,000; price 4,516; amount 49,681,115 2026-07-13: order 11,000; acquired 11,000; price 4,529; amount 49,822,980 2026-07-14: order 11,000; acquired 11,000; price 4,588; amount 50,474,060 2026-07-15: order 5,000; acquired 5,000; price 4,564; amount 22,823,660 2026-07-16: order 328; acquired 328; price 4,358; amount 1,429,560 2026-07-20: order 14; acquired 14; price 4,400; amount 61,600 Total: order 117,342; acquired 116,842; average price 4,433; total amount 518,048,730 Note: dates based on the settlement date; the total acquisition amount excludes brokerage commissions.

4. Whether the planned acquisition matches the actual acquisition Planned acquisition amount (KRW): Common shares 518,050,000; Other shares: none Total acquisition amount (KRW): Common shares 518,048,730; Other shares: none Shortfall from planned amount: Yes; Reason: share-price movements during the acquisition period, relative to the closing price on the day before the board resolution to acquire treasury shares (June 24, 2026), reduced the number of shares acquired versus the number planned; the Company completed the acquisition as close as possible to the planned amount, and the difference is attributable to per-share price rounding.

5. Treasury share holdings after the acquisition [as of July 20, 2026] (Unit: KRW, shares, %) Holdings under Article 165-3 of the Act (A): quantity 1,177,093; ratio 15.95%; total value 7,386,315,720 Holdings under a trust agreement per Article 165-3 (B): none Total (A+B): quantity 1,177,093; ratio 15.95%; amount 7,386,315,720 Note: the total value above is on a book-value basis including brokerage commissions.

6. Changes in the largest shareholder's shareholding before and after the acquisition [as of July 20, 2026] (Unit: shares) Name: Choi Dong-ho; Share type: common shares; Shares as of the acquisition report date: 3,210,191; Shares as of the end of the acquisition period: 3,210,191; Reason for change: none Total: common shares 3,210,191 -> 3,210,191; grand total 3,210,191 -> 3,210,191