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

What happened

Material Event Report (Decision to Acquire Own Convertible Bonds Before Maturity) OptiCore Co., Ltd. Material Event Report / Exchange reporting obligation matter To: Financial Services Commission / Korea Exchange August 5, 2026 Company name: OptiCore Co., Ltd. CEO: Moon Yoo-seok Head office: 501, The First Tower 3, 602 Dongtan-Giheung-ro, Yeongcheon-dong, Hwaseong-si, Gyeonggi-do (Phone) 070-4492-5446 (Website) http://www.opticore.co.kr Preparer: (Title) Head of Management Support Division (Name) Kim Hee-jin (Phone) 070-4492-5446

Decision to Acquire Own Convertible Bonds Before Maturity 1. Type of bonds: Series 4, bearer, interest-bearing, unsecured, privately placed convertible bonds 2. Bond issuance date: May 21, 2025 3. Bond issuance method: Private placement 4. Bond maturity date: May 21, 2030 5. Total face (electronically registered) amount of bonds (KRW): 8,000,000,000 6. Face (electronically registered) amount of bonds subject to acquisition (KRW): 5,000,000,000 7. Date of acquisition decision: August 5, 2026 8. Acquisition amount Amount (KRW): 5,165,477,517 Basis for calculation: Scheduled date of principal and interest payment: August 5, 2026 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 at a future board meeting (resale or retirement planned) 12. Conversion details Conversion ratio (%): 100 Conversion price as of reporting date (KRW/share): 3,868 Type of shares to be issued upon conversion: OptiCore Co., Ltd. registered common shares Number of shares: 1,292,657 Ratio to total shares outstanding (%): 5.02 Conversion request period: Start May 21, 2026 / End April 21, 2030 13. Face (electronically registered) balance of bonds after acquisition (KRW): - 14. Subject to Fair Trade Commission reporting: Not applicable 15. Other matters for reference in investment judgment - Regarding "11. Future handling plan," no specific disposition plan has been separately discussed to date following this acquisition before maturity; the final decision on resale or retirement will be made through a future board resolution. - Regarding the conversion price as of the reporting date in "12": effective May 7, 2026 (the record/effective date), the Company's 2-for-1 share consolidation (par value KRW 100 to KRW 200) caused the conversion price of these bonds to be adjusted from KRW 1,934 to KRW 3,868.

[Matters concerning the seller] Seller name: Korea Investment & Securities Co., Ltd. (in its capacity as trustee of the Alpen Route Blind Paradigm General Private Investment Trust No. 1 [Professional]) Relationship with company or largest shareholder: Bondholder of these bonds Selection process: - Transaction history and plans within 6 months before/after the acquisition decision: - Face value of bonds sold (KRW): 5,000,000,000 Note: -