[Amended] Supply contract signed

What happened

Amendment report

Amendment date: 2026-08-12

1. Disclosure document subject to amendment Supply contract signed

2. Date of filing of the disclosure document subject to amendment 2026-12-01 (as stated in the filing; this is later than the amendment date above)

3. Reason for amendment Amendment due to change in contract period

4. Amended items Amended item: Before amendment / After amendment 5. Contract period: Start date 2025-11-28, End date 2026-08-18 / Start date 2025-11-28, End date 2026-11-30

- Performance (delivery) of this contract was completed on August 11, 2026. - The tax invoice related to this matter was issued as of August 11. - Assuming a 90-day term, payment for this matter is expected to be completed by November 30, 2026. - Performance of this contract is currently proceeding with no particular issues.

Supply contract signed

1. Details of the sales/supply contract Semiconductor manufacturing equipment

2. Contract details Whether the contract is conditional: Not applicable Confirmed contract amount: - Conditional contract amount: - Total contract amount (KRW): - Most recent revenue (KRW): 100,095,115,191 As percentage of revenue (%): -

3. Counterparty ULVAC Korea - Most recent revenue (KRW): 429,450,393,289 - Main business: Semiconductor equipment - Relationship with the Company: None - Whether a similar contract has been performed with the Company in the last 3 years: Applicable

4. Sales/supply region China

5. Contract period Start date: 2025-11-28; End date: 2026-11-30

6. Main contract terms Whether there is a down payment/advance payment: Yes Payment terms, etc.: Advance payment 30%, 60% after delivery, 10% after setup

7. Sales/supply method In-house production: Applicable Outsourced production: Applicable Other: -

8. Contract (order) date 2025-11-28

9. Details related to disclosure confidentiality Confidentiality deadline: 2026-10-23 Reason for confidentiality: Withheld at the customer's request

10. Other matters for reference in investment decisions - The contract (order) date is the date the Company received the purchase order (PO). - The Company's most recent revenue is based on the consolidated financial statements as of the end of 2024. - The counterparty's most recent revenue is consolidated revenue as of June 30, 2025. - Regarding "9. Disclosure confidentiality" above, the main content of the contract (contract amount) has not been disclosed due to the need to maintain business confidentiality; investors are advised to invest carefully, considering the possibility of changes to or termination of the contract.

* Related disclosures: -