[Amended] Supply contract signed

What happened

Sungwoo Techron / Single sale and supply contract signed / (2026.07.29) Single sale and supply contract signed, Amendment report Amendment date: 2026-07-29

1. Disclosure document being amended: Single sale and supply contract signed 2. Filing date of the disclosure document being amended: 2026-05-28 3. Reason for amendment: 1. Extension of the post-delivery setup period 2. Amendment of the deadline for the non-disclosure item 4. Amended items

Amended item: 5. Contract period - end date Before amendment: 2026-07-31 After amendment: 2026-09-30

Amended item: 9. Non-disclosure item - non-disclosure deadline Before amendment: 2026-07-31 After amendment: 2026-09-30

- Single sale and supply contract signed

1. Contents of the sale/supply contract: Automated inspection equipment and others 2. Contract details Contingent contract: Not applicable Confirmed contract amount: 5,479,000,000 Contingent contract amount: 0 Total contract amount (KRW): 5,479,000,000 Recent sales (KRW): 41,687,064,810 Ratio to sales (%): 13.14

3. Counterparty Name: - Recent sales (KRW): - Main business: - Relationship with the company: - Performance of similar contracts with the company over the past 3 years: Not applicable

4. Sale/supply region: Domestic

5. Contract period Start date: 2025-11-24 End date: 2026-09-30

6. Key contract terms Down payment/advance payment: Yes Payment terms, etc.: Down payment (30%), interim payment (30%), balance (40%)

7. Sale/supply method Own production: Applicable Outsourced production: Not applicable Other: -

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

9. Non-disclosure item Non-disclosure deadline: 2026-09-30 Reason for non-disclosure: Protection of corporate management confidentiality

10. Other matters for reference in investment decisions - The "Recent sales (KRW)" in item 2 above is based on the 2024 consolidated financial statements. - The "Contract amount" in item 2 above excludes V.A.T. - The "Contract (order) date" in item 8 above is the date on the purchase contract.

* Related disclosures 2026-05-28 Single sale and supply contract signed