Treasury share acquisition: results report

What happened

Treasury share acquisition results report

To: Governor of the Financial Supervisory Service Date: August 3, 2026 Company Name: Hanwha Engine Co., Ltd. Representative Director: Kim Jong-seo Head Office Address: 67 Gongdan-ro, Seongsan-gu, Changwon-si, Gyeongsangnam-do (Sinchon-dong) (Phone) 055-260-6000 (Website) http://www.hanwha-engine.com Preparer in Charge: (Title) Planning Officer (Name) Kim Jin-young (Phone) 055-260-6168

1. Name and Address of the Issuer a. Name: Hanwha Engine Co., Ltd. b. Address: 67 Gongdan-ro, Seongsan-gu, Changwon-si, Gyeongsangnam-do (Sinchon-dong)

2. Matters Concerning the Acquisition Report a. Material event report filing date: July 14, 2026 b. Acquisition period: July 15, 2026 to July 30, 2026 * The above acquisition period is based on trade execution date.

3. Acquisition Details (Unit: KRW, shares) Date: 2026-07-15, Type: Common stock, Order Quantity: 30,000, Acquired Quantity: 30,000, Price per Share: 44,906, Total Acquisition Amount: 1,347,189,050, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-16, Type: Common stock, Order Quantity: 30,000, Acquired Quantity: 30,000, Price per Share: 45,554, Total Acquisition Amount: 1,366,621,100, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-20, Type: Common stock, Order Quantity: 30,000, Acquired Quantity: 30,000, Price per Share: 44,962, Total Acquisition Amount: 1,348,871,400, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-21, Type: Common stock, Order Quantity: 60,000, Acquired Quantity: 60,000, Price per Share: 42,558, Total Acquisition Amount: 2,553,486,050, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-22, Type: Common stock, Order Quantity: 60,000, Acquired Quantity: 41,311, Price per Share: 47,908, Total Acquisition Amount: 1,979,163,900, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-23, Type: Common stock, Order Quantity: 60,000, Acquired Quantity: 0, Price per Share: 0, Total Acquisition Amount: 0, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-24, Type: Common stock, Order Quantity: 30,000, Acquired Quantity: 30,000, Price per Share: 49,277, Total Acquisition Amount: 1,478,331,350, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-27, Type: Common stock, Order Quantity: 30,000, Acquired Quantity: 30,000, Price per Share: 49,548, Total Acquisition Amount: 1,486,450,000, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-28, Type: Common stock, Order Quantity: 30,000, Acquired Quantity: 30,000, Price per Share: 44,640, Total Acquisition Amount: 1,339,229,150, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-29, Type: Common stock, Order Quantity: 58,100, Acquired Quantity: 58,100, Price per Share: 39,673, Total Acquisition Amount: 2,305,006,150, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Date: 2026-07-30, Type: Common stock, Order Quantity: 12,000, Acquired Quantity: 11,706, Price per Share: 40,699, Total Acquisition Amount: 476,431,025, Brokerage: Hanwha Investment & Securities, Financial Investment Business Entity ID: 00148610 Total: Order Quantity 430,100, Acquired Quantity 351,117, Average Price per Share 44,660, Total Acquisition Amount 15,680,779,175 Note 1: The above dates are based on trade execution date. Note 2: The above price per share and total acquisition amount do not include fees. Note 3: "Price per Share" is the average acquisition unit price.

4. Whether Planned and Actual Acquisition Amounts Match Planned Acquisition Amount (KRW): Common stock 339,411 / Other class shares - Total Acquisition Amount (KRW): Common stock 351,117 / Other class shares - Whether Below Planned Acquisition Amount: - / Reason if Below: - Note: The company completed the share acquisition as closely as possible to the planned acquisition amount stated in the material event report. The difference between the common stock planned acquisition amount and the total acquisition amount is less than the price of one share.

5. Treasury Share Holdings After Acquisition [as of August 3, 2026] (Unit: KRW million, shares, %) Share Type: Common stock Holdings under Article 165-3 (A): Quantity 351,117 / Ratio 0.4 / Total Value 15,696 Holdings under Trust Agreement per Article 165-3 (B): Quantity - / Ratio - / Contract Amount - Total (A+B): Quantity 351,117 / Ratio 0.4 / Amount 15,696 Total (all share types): Quantity 351,117 / Ratio 0.4 / Amount 15,696

Note: Following this treasury share acquisition, the company's total treasury shares held are 372,724 shares, of which 21,607 shares were acquired under Article 341-2 of the Commercial Act and do not fall under Article 165-3 of the Capital Markets Act. "Total Value" and "Amount" above are book amounts including fees.

6. Changes in Shares Held by the Largest Shareholder Before and After Acquisition [as of August 3, 2026] (Unit: shares) Name: Hanwha Impact Co., Ltd. Share Type: Common stock Shares Held at Acquisition Report Date: 27,345,628 Shares Held at Acquisition End Date: 27,345,628 Reason for Change: - Total: Common stock 27,345,628 / 27,345,628 / - ; Other class shares - / - / - Grand Total: 27,345,628 / 27,345,628 / -