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

What happened

Material Event Report (Decision to Redeem Own Convertible Bonds Before Maturity) 6.0

HLB bioStep Co., Ltd.

Material Event Report / Korea Exchange Reporting Obligation To the Financial Services Commission / Korea Exchange September 3, 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 Person responsible for preparation: (Title) Director (Name) Han Sang-ok (Phone) 070-7731-4270

Decision to Redeem Own Convertible Bonds Before Maturity

1. Type of bonds: series 4; type: unregistered unsecured private-placement 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 (electronically registered) amount of the bonds (KRW): 20,000,000,000 6. Face (electronically registered) amount of bonds subject to redemption (KRW): 2,000,000,000 7. Redemption decision date: September 3, 2026 8. Redemption amount: amount (KRW) 2,063,219,000; basis for determination: payment of principal and interest; scheduled payment date September 11, 2026; source of redemption funds: own funds 9. Redemption method: off-exchange purchase 10. Reason for redemption before maturity: decision to redeem the bonds before maturity through consultation with the bondholder 11. Future handling plan: to be determined later through board resolution

12. Conversion matters Conversion ratio (%): 100 Conversion price as of the report date (KRW/share): 7,990 Type of shares to be issued upon conversion: HLB bioStep Co., Ltd. registered common shares Number of shares: 250,312 Ratio to total shares outstanding (%): 1.42 Conversion request period: start date February 20, 2026; end date January 20, 2028

13. Remaining face (electronically registered) balance of the bonds after redemption (KRW): 2,000,000,000 14. Whether subject to Fair Trade Commission filing: not applicable

15. Other matters for reference in investment decisions 1) "7. Redemption decision date" above is the date of the board resolution. 2) The "amount" in "8. Redemption amount" above is the sum of principal and interest, and the "scheduled payment date" is the final scheduled payment date for the bond redemption proceeds. 3) The "conversion price as of the report date" in "12. Conversion matters" above reflects adjustments due to market price changes since issuance and the adjustment from the stock consolidation on April 28, 2026. 4) "Shares to be issued upon conversion" in "12. Conversion matters" above is the number of shares to be issued and the ratio to total shares outstanding, assuming the full amount of the convertible bonds to be redeemed in this transaction is converted. 5) "13. Remaining face (electronically registered) balance of the bonds after redemption" above reflects the decrease in face amount from: a conversion request on February 23, 2026 (KRW 250 million), redemption before maturity through consultation with the bondholder on July 14 and August 13, 2026 (KRW 9.75 billion), and an early redemption request on August 20, 2026 (KRW 6 billion).

[Matters concerning the seller] Seller name: HLB Genex Co., Ltd.; Relationship to the company or largest shareholder: special related party of the largest shareholder; Selection process: the bondholder of these bonds; Transactions and plans within 6 months before and after the redemption decision: purchases and sales of KRW 9,247,322; Face amount of bonds sold (KRW): 2,000,000,000; Note: -

[Where the seller includes the company's largest shareholder or a special related party thereof] Seller name: HLB Genex Co., Ltd.; Relationship to the largest shareholder: special related party of the largest shareholder; Shares held at the time of the convertible bond issuance: quantity -, ratio (%) -; Shares to be issued upon conversion: quantity 250,312, ratio (%) 47.06; Note: -