Updated contract terms.

HD Hyundai Marine Engine / Single Sales and Supply Contract Execution / (2026.09.18) Single Sales and Supply Contract Execution Correction Report

Correction Date: 2026-09-18

1. Disclosure Document Subject to Correction Single Sales and Supply Contract Execution

2. Original Disclosure Document Submission Date 2024-05-10

3. Reason for Correction Change in contract period end date

4. Correction Details Correction Item | Before Correction | After Correction Contract Period End Date | 2026-09-26 | 2026-11-15

- The above contract period end date may be adjusted somewhat according to the vessel engine shipment schedule.

Single Sales and Supply Contract Execution

1. Sales and Supply Contract Classification Other Sales and Supply Contract - Contract Name: Vessel Engine Supply Contract

2. Contract Details Contract Amount (KRW): 34,407,344,000 Recent Sales (KRW): 179,328,152,621 Percentage of Sales (%): 19.2 Large Corporation Status: Not Applicable

3. Contracting Party Taizhou Sanfu Ship Engineering Co., Ltd - Relationship with Company: -

4. Sales and Supply Region China

5. Contract Period Start Date: 2023-11-22 End Date: 2026-11-15

6. Principal Contract Terms Advance Payment / Prepayment Existence: Yes Payment Terms: Advance payment and final payment (according to engine supply schedule)

7. Contract (Order) Date 2023-11-22

8. Disclosure Reservation Reservation Reason: - Reservation Period: -

9. Other Material Matters Related to Investment Decisions 1. The above recent sales are based on the consolidated financial statements as of the end of 2022. 2. The above contract period may vary according to the vessel construction schedule of the counterparty shipyard. 3. The above contract amount is calculated by applying the initial official exchange rate on the contract date (1,287.7 KRW/USD).

※ Related Disclosures 2023-11-23 Single Sales and Supply Contract Execution 2024-05-10 Single Sales and Supply Contract Execution