Long-Term Data Center Power Infrastructure Supply Contract — KRW 1.12 Trillion

Major Management Matters Related to Investment Decisions 1. Title Execution of Long-Term Supply Contract for Data Center Power Infrastructure 2. Key Details Contract Name: Supply of Data Center Distribution and Power Equipment Contract Amount: KRW 1,121.2 billion (27.5% of annual revenue) Counterparty: HD Hyundai Electric America Corporation Contract Period: 2026-07-02 ~ 2029-01-01 3. Board Resolution Date (or Date of Confirmation) 2026-07-02 - Outside Director Attendance: Present ( — ) / Absent ( — ) - Audit Committee Member (non-outside-director auditor) Attendance: — 4. Other Material Matters Relevant to Investment Decisions - The above contract is a back-to-back supply agreement under which the Company's U.S. Atlanta subsidiary (HD Hyundai Electric America Corporation) first concluded a product-specific addendum agreement with a global big-tech company and subsequently re-issued the order to the Company. - Actual Purchase Orders (POs) under this contract will be issued individually on multiple occasions during the contract period; separate regulatory disclosures will be filed for any PO that meets the applicable disclosure threshold. - The terms of this contract are subject to change depending on market conditions and circumstances. - The contract amount stated above is the KRW equivalent of USD 721,293,753, converted using the KEB Hana Bank first-announced buying/selling reference rate on 2026-07-02: USD/KRW = 1,554.40. - The annual revenue figure used as the comparison base is from the consolidated financial statements as of end of 2025. - The confirmation date above is the date of signature on the supply contract. ※ Related Disclosures: —