[Amended] Supply contract signed

What happened

CK Solution / Supply Contract Signed / (2026.08.31) Supply Contract Signed

Amendment Report Amendment date: 2026-08-31

1. Disclosure document being amended: Single Sale/Supply Contract Signed 2. Filing date of the disclosure document being amended: 2026-06-29 3. Reason for amendment: Change in contract amount and contract period; report of project completion

4. Amended items Item 2. Contract details - Contract amount (KRW): Before: 24,886,499,008; After: 7,554,276,091 Item 2. Contract details - As a percentage of revenue (%): Before: 8.41; After: 2.55 Item 5. Contract period - End date: Before: -; After: 2026-08-31 Item 9. Other important matters relevant to investment decisions: Before: "1) Of the above contract details, the finalized contract amount is USD 16,906,589.00, converted using the first-quoted matching exchange rate of the Seoul Money Brokerage Services as of the contract date, November 24, 2025 (USD/KRW 1,472.00). 2) The most recent revenue in the contract details is based on the consolidated financial statements as of the end of 2024. 3) The construction period and contract amount may change in the course of construction. 4) The counterparty to this contract is CK AMERICA, INC., a subsidiary of the Company, CK Solution Co., Ltd." After: "1) Of the above contract details, the finalized contract amount is USD 5,131,981.04, converted using the first-quoted matching exchange rate of the Seoul Money Brokerage Services as of the contract date, November 24, 2025 (USD/KRW 1,472.00). 2) The most recent revenue in the contract details is based on the consolidated financial statements as of the end of 2024. 3) The counterparty to this contract is CK AMERICA, INC., a subsidiary of the Company, CK Solution Co., Ltd."

- Single Sale/Supply Contract Signed

1. Type of sale/supply contract: Construction order received Contract name: L-H Battery Ohio Project_BP3-2 UT Hook-up Mechanical Work

2. Contract details Contract amount (KRW): 7,554,276,091 Most recent revenue (KRW): 295,772,527,163 As a percentage of revenue (%): 2.55 Whether a large corporation: Not applicable

3. Counterparty: L-H Battery Company, Inc. Relationship with the Company: -

4. Sale/supply region: United States

5. Contract period Start date: 2025-11-24 End date: 2026-08-31

6. Key contract terms Whether there is a contract deposit/advance payment: Yes Payment terms, etc.: Payment to be made according to progress under this contract

7. Contract (order) date: 2025-11-24

8. Matters relating to disclosure deferral Reason for deferral: - Deferral deadline: -

9. Other important matters relevant to investment decisions 1) Of the above contract details, the finalized contract amount is USD 5,131,891.04 (as stated in the filing), converted using the first-quoted matching exchange rate of the Seoul Money Brokerage Services as of the contract date, November 24, 2025 (USD/KRW 1,472.00). 2) The most recent revenue in the contract details is based on the consolidated financial statements as of the end of 2024. 3) The counterparty to this contract is CK AMERICA, INC., a subsidiary of the Company, CK Solution Co., Ltd.

* Related disclosures 2025-11-25 Single Sale/Supply Contract Signed 2026-06-29 Single Sale/Supply Contract Signed