Material event report (decision to redeem own convertible bonds early)

What happened

Material event report / Matters subject to KRX reporting obligation To the Financial Services Commission / Korea Exchange September 29, 2026 Company name: Satoshi Holdings Co., Ltd. CEO: Yeom Je-woo Head office address: 5 Seolleung-ro 135-gil, Gangnam-gu, Seoul (Nonhyeon-dong) (Phone) 02-3012-0033 (Website) http://satoshi.holdings Preparer: (Title) CEO (Name) Yeom Je-woo (Phone) 070-4211-0750

Decision to acquire own convertible bonds before maturity

1. Bond type: Tranche 10; unregistered (bearer) form, interest-bearing, unsecured, privately placed convertible bonds 2. Bond issue date: July 21, 2025 3. Bond issuance method: Private placement 4. Bond maturity date: July 21, 2028 5. Total face value (electronically registered) of the bonds (KRW): 700,000,000 6. Face value (electronically registered) amount of the bonds to be acquired (KRW): 500,000,000 7. Acquisition decision date: September 29, 2026 8. Acquisition amount - Amount (KRW): 501,158,913 - Basis for calculation: principal and interest payment date September 29, 2026 - Source of acquisition funds: own funds (rights-offering payment proceeds) 9. Method of acquisition: Over-the-counter purchase 10. Reason for acquisition before maturity: Decision to acquire the bonds before maturity by agreement with the bondholder 11. Future handling plan: Expected cancellation of registration with the Korea Securities Depository 12. Matters concerning conversion - Conversion ratio (%): 100 - Conversion price as of the reporting date (KRW/share): 13,679 - Type of shares to be issued upon conversion: - - Number of shares: - - Ratio to total shares (%): - - Conversion request period: start July 21, 2026, end June 21, 2028 13. Remaining face value (electronically registered) of the bonds after acquisition (KRW): 200,000,000 14. Whether subject to Fair Trade Commission reporting: Not applicable 15. Other matters for reference in investment decisions - The above acquisition decision date is the board resolution date, and the payment (expected) date is the expected date for the share and bond settlement.

[Matters concerning the seller] Seller name: Yeom Je-woo; relationship with the Company or its largest shareholder: CEO, bondholder of this bond; reason for selection: -; transaction history and plans within 6 months before/after the acquisition decision: -; face value of the bonds sold (KRW): 500,000,000; note: -

[Cases where the seller includes the issuer's largest shareholder or a related party] Seller name: Yeom Je-woo; relationship with the largest shareholder: related party; shares held at the time of the convertible bonds' issuance: quantity -, ratio (%) -; shares to be issued upon conversion: quantity -, ratio (%) -; note: -