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

What happened

Material event report / Exchange filing obligation matter To the Financial Services Commission / Korea Exchange July 21, 2026 Company name: HLB bioStep Co., Ltd. Representative Director: Baek Seong-jin Head office address: 38, Academy-ro 79beon-gil, Yeonsu-gu, Incheon (Phone) 032-833-8899 (Website) http://www.hlbbiostep.com Preparer: (Title) Director (Name) Han Sang-ok (Phone) 070-7731-4270

Decision to redeem own convertible bonds before maturity

1. Type of bonds Series: 4th Type: unregistered, unsecured, privately placed convertible bonds

2. Bond issue date: February 20, 2025 3. Bond issuance method: private placement 4. Bond maturity date: February 20, 2028 5. Total face value (electronically registered) of the bonds (KRW): 20,000,000,000 6. Face value (electronically registered) of the bonds to be acquired (KRW): 6,000,000,000 7. Date of acquisition decision: July 21, 2026 8. Acquisition amount Amount (KRW): 6,182,262,000 Basis of calculation: principal and interest Payment (scheduled) date: August 20, 2026 Source of acquisition funds: own funds 9. Method of acquisition: over-the-counter purchase 10. Reason for acquisition before maturity: bondholders' exercise of early redemption (put option) rights 11. Future handling plan: cancellation of the registered bond with the Korea Securities Depository 12. Matters concerning conversion Conversion ratio (%): 100 Conversion price as of the reporting date (KRW/share): 7,990 Type of shares to be issued upon conversion: HLB bioStep Co., Ltd. registered common shares Number of shares: 750,938 Ratio to total shares outstanding (%): 4.13 Conversion request period: from February 20, 2026 to January 20, 2028 13. Remaining face value (electronically registered) of the bonds after acquisition (KRW): 4,000,000,000 14. Whether subject to Fair Trade Commission reporting: not applicable 15. Other matters for reference in investment decisions 1) The above "7. Date of acquisition decision" is the date the early redemption request was received from the Korea Securities Depository. 2) The "amount" in the above "8. Acquisition amount" is the sum of principal and interest, and the "payment (scheduled) date" is the first early redemption date. 3) In the above "12. Matters concerning conversion," the "conversion price as of the reporting date" reflects adjustments for market price changes after issuance and the adjustment following the share consolidation on April 28, 2026. 4) In the above "12. Matters concerning conversion," the "shares to be issued upon conversion" is the number of shares expected to be issued and the ratio to total shares outstanding, calculated assuming full conversion of the convertible bonds to be acquired this time. 5) The above "13. Remaining face value of the bonds after acquisition" reflects a decrease of KRW 250 million in face value from a conversion request on February 23, 2026 and a decrease of KRW 9.75 billion in face value from the decision to redeem own convertible bonds before maturity on July 14, 2026.

[Matters concerning the seller] Seller name: - Relationship with the company or the largest shareholder: - Basis of selection: - Transaction history and plans within 6 months before and after the acquisition decision: - Face value of bonds sold (KRW): 6,000,000,000 Remarks: see note

Note: This acquisition is based on early redemption requests from unspecified numerous bondholders under the early redemption (put option) exercise schedule set out in the convertible bond underwriting agreement, so no specific seller is identified.