[Amended] Supply contract signed

What happened

Gaonchips/Single Sale/Supply Contract Signed/(2026.10.01) Single Sale/Supply Contract Signed

Amendment Report Amendment date: 2026-10-01 1. Disclosure document being amended: Single Sale/Supply Contract Signed 2. Date of original disclosure document: 2025-12-26 3. Reason for amendment: Change of contract period 4. Amended Items Item: 5. Contract period - End date: Before: 2026-10-01; After: 2027-10-01 Item: 9. Disclosure deferral matters - Deferral deadline: Before: 2026-10-01; After: 2027-10-01

- Single Sale/Supply Contract Signed 1. Content of Sale/Supply Contract: Design and development of application-specific semiconductors (ASIC) 2. Contract Details Conditional contract: Not applicable Confirmed contract amount: KRW 17,880,400,000 Conditional contract amount: - Total contract amount (KRW): 17,880,400,000 Recent revenue (KRW): 96,492,001,688 As % of revenue: 18.53 3. Counterparty: - Recent revenue (KRW): - Main business: - Relationship with the company: - Performance of similar contracts with the company over the last 3 years: Not applicable 4. Sale/Supply region: - 5. Contract period: Start date 2025-12-24; End date 2027-10-01 6. Key contract terms Down payment/advance payment: No Payment terms, etc.: Within 30 days after payment conditions are met 7. Sale/Supply method: In-house production: Applicable; Outsourced production: Applicable; Other: - 8. Contract (order) date: 2025-12-24 9. Disclosure Deferral Matters Deferral deadline: 2027-10-01 Reason for deferral: Counterparty's request regarding trade secrets 10. Other Matters for Investment Reference - The recent revenue above is based on the 2024 consolidated financial statements. - The contract amount above excludes VAT. - The contract amount and contract period above may change during the design process. - The contract (order) date above is the date on which both parties completed signing the contract. - Counterparty information (company name, recent revenue, relationship with the company) has not been disclosed at the counterparty's request to maintain trade secrecy. ※ Related Disclosures 2025-12-26 Single Sale/Supply Contract Signed