[Amended] Supply contract signed

What happened

YAS / Single sales/supply contract signed / (2026.08.19) Single sales/supply contract signed

Amendment report (notice) Amendment date: 2026-08-19

1. Disclosure document being amended: 2026-08-19 (as stated in the filing) 2. Original filing date of the disclosure document being amended: 2026-04-20 3. Reason for amendment: Confirmation of performance of the single sales/supply contract 4. Amendment items:

Item: 10. Other matters for investment reference Before: - After: "-Received the down payment (30%); the interim payment (60%) and final payment (10%) will be confirmed through an amendment disclosure after the payment terms are fulfilled."

Single sales/supply contract signed 1. Details of the sales/supply contract: Deposition equipment for display mass production 2. Contract details: Conditional contract: Not applicable; Confirmed contract amount: -; Conditional contract amount: -; Total contract amount (KRW): -; Recent revenue (KRW): 34,763,681,766; % of revenue: - 3. Counterparty: Guangzhou China Star Optoelectronics Printing Display Technology Co., Ltd.; Recent revenue: -; Main business: production and sale of display products; Relationship with company: -; Performance of same-type contract in last 3 years: Not applicable 4. Sales/supply region: China 5. Contract period: start 2026-04-17; end 2027-12-31 6. Key contract terms: Down payment/advance payment: Yes; Payment terms: down payment 30% (paid by T/T after PO issuance); interim payment 60% (paid by L/C after FOB); balance 10% (paid by T/T after FAR signing) 7. Sales/supply method: In-house production: applicable; Outsourced production: applicable; Other: - 8. Contract (order) date: 2026-04-17 9. Disclosure deferral: deferral deadline 2027-12-31; reason: preservation of business confidentiality 10. Other matters for investment reference: - Recent revenue in item 2 above is based on the FY2025 consolidated financial statements. - The start date of the contract period in item 5 above is the PO receipt date; the end date may change by mutual agreement between the two companies. - The contract (order) date in item 8 above is the PO receipt date. - As the contract amount is undisclosed due to the need to preserve business confidentiality, investors are advised to invest prudently in light of the possibility that the contract may change or be terminated. - Received the down payment (30%); the interim payment (60%) and final payment (10%) will be confirmed through an amendment disclosure after the payment terms are fulfilled. ※ Related disclosures: -