[Amended] Material event report (convertible bonds)

What happened

Material Event Report (Decision to Issue Convertible Bonds) Alpha AI Co., Ltd.

Amendment Report August 20, 2026

1. Disclosure document subject to amendment: Material event report (decision to issue convertible bonds) 2. Original filing date of the disclosure document subject to amendment: January 27, 2026 3. Amendments Item: -; Reason for amendment: Withdrawal due to the prospective subscriber's failure to perform its agreed obligations; Before: -; After: -

Material Event Report / Matter Subject to Exchange Reporting Obligation To: Financial Services Commission / Korea Exchange Date: August 20, 2026 Company name: Alpha AI Co., Ltd. Representative Director: Seong-min Mun Head office address: 154 Seotan-ro, Seotan-myeon, Pyeongtaek-si, Gyeonggi-do Phone: 031-610-4000 Website: http://alphaai.co.kr Preparer: Title: President, Name: Hui-seung Hyeon, Phone: 031-610-4000

Decision to Issue Convertible Bonds 1. Type of bonds: Series 18; Type: Unregistered, interest-bearing, unsecured, privately placed convertible bonds 2. Total face (electronically registered) value of the bonds (KRW): - 2-1. Remaining issuance limit under the articles of incorporation (KRW): - 2-2. (Overseas issuance) Total face (electronically registered) value (currency unit): -; Applicable exchange rate, etc.: -; Place of issuance: -; Name of the market if listed overseas: - 3. Purpose of raising funds: Facility funds (KRW) -; Business-acquisition funds (KRW) -; Working capital (KRW) -; Debt-repayment funds (KRW) -; Funds for acquiring securities of another company (KRW) -; Other funds (KRW) - 4. Interest rate on the bonds: Coupon rate (%) -; Maturity interest rate (%) - 5. Bond maturity date: - 6. Interest payment method: - 7. Principal repayment method: - 8. Bond issuance method: Private placement 9. Matters concerning conversion: Conversion ratio (%) -; Conversion price (KRW/share) -; Method of determining the conversion price -; Type of shares to be issued upon conversion -; Number of shares -; Ratio to total shares outstanding (%) -; Conversion request period Start date -, End date -; Matters concerning conversion price adjustment -; Conversion price adjustment for market price declines - Minimum adjusted price (KRW) -, Basis for the minimum adjusted price -; Remaining issuance limit that may be adjusted to below 70% of the conversion price at issuance (KRW) - 9-1. Matters concerning options: - 10. Matters concerning merger: - 11. Subscription date: - 12. Payment date: - 13. Payment method: Cash 14. Lead underwriter: - 15. Guarantee institution: - 16. Matters concerning provision of collateral: - 17. Board resolution date (decision date): -; Independent (outside) director* attendance: Present -, Absent -; Statutory auditor (audit committee member) attendance: - 18. Whether subject to filing of a securities registration statement: No 19. Reason for exemption from filing: - 20. Whether the period falls within a period during which acquisition of these convertible bonds is prohibited due to short selling: No; Start date -; End date - 21. Details of securities lending transactions linked to the overseas issuance of these bonds (purpose, number of shares, particulars of the lender and borrower, scheduled disposal timing, lending terms (period, repayment terms, interest rate), repayment method, connection with this convertible bond issuance, fees, etc.): - 22. Whether subject to filing with the Fair Trade Commission: Not applicable * For listed companies, "independent director"; for unlisted companies, "outside director," applies. 23. Other matters for reference in investment decisions

[Details of bond issuance to specific subscribers] Subscriber name: -; Relationship with the company or largest shareholder: -; Background of selection: -; Transactions and plans within 6 months before and after the issuance decision: -; Face (electronically registered) value to be issued (KRW): -; Remarks: -

[Where the material event report for a privately placed bond issuance to specific subscribers is amended 5 or more times] Reason for amendment: Withdrawal; Future plan: -

[Specific purpose of use of the raised funds] [In the case of working capital or other funds] (Unit: KRW million) Purpose of funds: Details*; Planned amount by year - 2026, 2027, 2028 and after, Total Working capital: -; -; -; -; -

[Matters concerning convertible bonds related to unredeemed share certificates] Category: Already-issued unredeemed bonds - Type; Remaining balance (KRW); Conversion (exercise) price (KRW); Number of shares convertible (exercisable); Conversion (exercise) period; Remarks 15th series(*): 6,600,000,000; -; -; -; - 16th series(*): 5,500,000,000; -; -; -; - 17th series(*): 5,000,000,000; -; -; -; - Subtotal: 17,100,000,000; - (A); -; -; - Newly issued bonds: -; - (B); -; -; - Total: 17,100,000,000; -; -; -; - Total shares already issued (shares) (C): 20,110,080 Ratio to total shares already issued (%) (D=(A+B)/C): - (*) No shares are convertible due to acceleration (loss of benefit of time).