Completion report on merger, etc. (asset transfer)

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KG Dongbusteel / Completion Report on Merger, Etc. (Asset Transfer)

Completion Report on Merger, Etc. (Asset Transfer) To the Governor of the Financial Supervisory Service August 31, 2026

Company name: KG Steel Co., Ltd. Representative director: Kim Seong-il Head office address: 5th floor, KG Tower, 92 Tongil-ro, Jung-gu, Seoul (Telephone) 02-3450-8114 (Website) https://kg-steel.co.kr Preparer: (Title) Head of Finance Office, Management Support Division (Name) Kim Hyung-do (Telephone) 02-3450-8095

I. Schedule This report concerns the Material Event Report (Decision to Acquire Equity and Investment Securities of Another Company) filed on March 31, 2026, and reports that the share acquisition and payment were completed on August 31, 2026, concluding the transaction. * Disclosure: [Amended] Material Event Report (Equity and Investment Securities Acquisition Decision), '26.08.27

1. Overview of the transaction Issuing company: K Car Co., Ltd. Shares acquired: 25,632,810 shares Transferor: Hahn & Company Auto Service Holdings LLC Acquisition amount: KRW 394,610,154,745

2. Key schedule External valuation period: June 17, 2026 to June 26, 2026 Board resolution date: March 31, 2026 Share purchase agreement execution date: March 31, 2026 Initial material event report filing date: March 31, 2026 Final payment receipt date / closing date: August 31, 2026

3. Method of payment Down payment, Receipt date: April 1, 2026; Amount (KRW): 37,500,198,782; Method: Cash Balance, Receipt date: August 31, 2026; Amount (KRW): 357,109,955,963; Method: Cash Total, Amount (KRW): 394,610,154,745 * The final acquisition price was determined after adjusting for net income and dividend payments, etc. from January 1, 2026 to the closing date.

II. Changes in the shareholding of the largest shareholder, etc.: Not applicable. III. Exercise of appraisal rights: Not applicable. IV. Matters relating to creditor protection: Not applicable. V. Status of related litigation: Not applicable. VI. Matters relating to new share allotment, etc.: Not applicable.

VII. Summary financial information before and after the [merger, etc.] (Unit: KRW million) Current assets, Before the asset acquisition: 1,443,985; Change: -394,610; After the asset acquisition: 1,049,375 Non-current assets, Before: 1,944,344; Change: 394,610; After: 2,338,954 Total assets, Before: 3,388,329; Change: -; After: 3,388,329 Current liabilities, Before: 1,087,598; Change: -; After: 1,087,598 Non-current liabilities, Before: 153,727; Change: -; After: 153,727 Total liabilities, Before: 1,241,325; Change: -; After: 1,241,325 Capital stock, Before: 555,311; Change: -; After: 555,311 Retained earnings, Before: 1,280,353; Change: -; After: 1,280,353 Other equity, Before: 311,340; Change: -; After: 311,340 Total equity, Before: 2,147,004; Change: -; After: 2,147,004

Note: The "before the asset acquisition" summary financial information above is based on the most recent available separate statement of financial position as of June 30, 2026, as of the filing date; the "after the asset acquisition" summary financial information simply adds/subtracts the amounts related to this asset acquisition, and the actual financial information may differ depending on the results of the external auditor's audit or review.