[Amended] Supply contract signed

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Sphere / Single sale/supply contract signed / (2026.08.06) Single sale/supply contract signed

Amendment Report (Report) Amendment date: 2026-08-06 1. Disclosure document concerned: Single sale/supply contract signed 2. Filing date of the disclosure document concerned: 2026-07-06 3. Reason for amendment: Amendment of disclosed matters following completion of contract performance 4. Amended items

Item: 9. Matters concerning non-disclosure Before: Non-disclosure period - After: Non-disclosure period 2026-08-06

Item: 10. Other matters for reference in investment decisions Before: (omitted) After: (the following sentence added) - Pursuant to the proviso to Article 42(3) of the KOSDAQ Market Disclosure Regulation and Article 20(3) and (4) of its Enforcement Rules, in accordance with the counterparty's trade-secret protection clause, the Company will continue non-disclosure of only general information even after the non-disclosure period for the original contract end date has expired.

* Related disclosures (before amendment): 2025-04-24, 2025-05-09, 2025-07-11, 2025-08-22, 2026-02-24, 2026-05-12 Single sale/supply contract signed * Related disclosures (after amendment): 2025-04-24, 2025-05-09, 2025-07-11, 2025-08-22, 2026-02-24, 2026-05-12, 2026-07-06 Single sale/supply contract signed - Current contract performance has been completed. - Pursuant to the counterparty's trade-secret protection clause, the Company will continue non-disclosure, disclosing only general information.

Single sale/supply contract signed 1. Details of the sale/supply contract: Special alloy supply contract 2. Contract details Conditional contract: Not applicable Confirmed contract amount (KRW): 20,319,210,726 Conditional contract amount: - Total contract amount (KRW): 20,319,210,726 Most recent revenue (KRW): 2,557,761,611 Ratio to revenue (%): 794.41 3. Counterparty: A U.S. global space-launch company Most recent revenue: -; Main business: -; Relationship with the company: - Whether the company and the counterparty have performed the same type of contract in the past 3 years: Yes 4. Sale/supply region: Overseas 5. Contract period: Start date 2025-04-24; End date 2026-08-06 6. Key contract terms Whether there is a down payment/advance payment: No Payment terms, etc.: 30 days after product delivery 7. Sale/supply method: In-house production - Not applicable; Outsourced production - Applicable; Other - 8. Contract (order) date: 2025-04-24 9. Matters concerning non-disclosure Non-disclosure period: - Reason for non-disclosure: Counterparty's request for non-disclosure of trade secrets 10. Other matters for reference in investment decisions - The contract amount in "2. Contract details" above is USD 14,283,151.08, converted using the Seoul Money Brokerage Services basic exchange rate of 1,422.60 KRW/USD as of April 23, 2025, excluding customs duties, etc. - The most recent revenue in "2. Contract details" above is based on revenue under the consolidated financial statements for fiscal year 2024. - The counterparty information in "3. Counterparty" above (the counterparty's corporate name, most recent revenue, relationship with the company, and items supplied) has not been disclosed at the counterparty's request to protect its trade secrets. - The end date of the contract period in "5." above is the expected end date taking into account the expected payment schedule after delivery; any future schedule change will be disclosed by an amendment report. - The contract start date in "5." above and the contract (order) date in "8." above are based on the date of receipt (confirmation) of the purchase order document. - The above contract details may change through consultation with the counterparty depending on progress. - Pursuant to the proviso to Article 42(3) of the KOSDAQ Market Disclosure Regulation and Article 20(3) and (4) of its Enforcement Rules, in accordance with the counterparty's trade-secret protection clause, the Company will continue non-disclosure of only general information even after the non-disclosure period for the original contract end date has expired.

* Related disclosures 2025-04-24 Single sale/supply contract signed 2025-05-09 Single sale/supply contract signed 2025-07-11 Single sale/supply contract signed 2025-08-22 Single sale/supply contract signed 2026-02-24 Single sale/supply contract signed 2026-05-12 Single sale/supply contract signed 2026-07-06 Single sale/supply contract signed