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

What happened

SyntekaBio Co., Ltd. Material event report / Matter subject to KRX reporting obligation To: Financial Services Commission / Korea Exchange August 19, 2026 Company name: SyntekaBio Co., Ltd. CEO: Jeong Jong-seon Head office location: 18 Gukjegwahak 17-ro, Yuseong-gu, Daejeon Phone: 070-7663-0958 Website: http://www.syntekabio.com Preparer: (Title) Executive Director (Name) Lee Seung-jae (Phone) 070-7663-0959

Decision to redeem own convertible bonds before maturity 1. Type of bond: Series 4, unregistered, interest-bearing, unsecured, privately placed convertible bond 2. Bond issuance date: 2025.09.12 3. Bond issuance method: Private placement 4. Bond maturity date: 2028.09.12 5. Total face (electronically registered) amount of bond (KRW): 10,000,000,000 6. Face (electronically registered) amount of bond subject to acquisition (KRW): 900,000,000 7. Date of acquisition decision: 2026.08.19 8. Acquisition amount: amount (KRW) 946,051,234; basis of calculation: principal and interest; (expected) payment date: 2026.08.19; source of acquisition funds: own funds 9. Acquisition method: Over-the-counter purchase 10. Reason for acquisition before maturity: Mutual agreement with bondholder 11. Future handling plan: To be decided by the board later (resale or retirement) 12. Conversion-related matters: Conversion ratio (%): 100; Conversion price as of reporting date (KRW/share): 3,473; Type of stock to be issued upon conversion: SyntekaBio Co., Ltd. registered common stock; Number of shares: 259,141; Ratio to total shares outstanding (%): 1.07; Conversion request period: start 2026.09.12; end 2028.08.12 13. Remaining face (electronically registered) balance of bond after acquisition (KRW): - 14. Subject to Fair Trade Commission reporting: Not applicable 15. Other matters for investment reference: - Regarding "11. Future handling plan," no specific handling plan has been separately discussed to date following this acquisition before maturity; the Company will make a final decision on resale or retirement through a future board resolution.

[Matters concerning the seller] Seller name | Relationship with company or largest shareholder | Selection background | Transactions/plans within 6 months before/after acquisition decision | Face amount of bond sold (KRW) | Note Sangsangin Savings Bank: -; Bondholder of this bond; -; 900,000,000; -