[Amended] Material event report (decision to sell own convertible bonds)

What happened

Material Event Report (Decision to Sell Own Convertible Bonds) 6.0 VitzroSys Co., Ltd. Amendment Report (Correction) July 30, 2026 1. Disclosure document being amended: Material event report (decision to sell own convertible bonds) 2. Original filing date of the disclosure document being amended: June 30, 2026 3. Amendment details Item: 9. Sale proceeds receipt (expected) date; reason for amendment: change of balance payment schedule; before amendment: 2026-07-30; after amendment: 2026-08-31 Item: 13. Other matters material to investment decisions; reason for amendment: change of balance payment schedule; before amendment: (2) balance receipt date: July 30, 2026 (KRW 2,375,000,000, 95% of the sale amount); after amendment: (2) balance receipt date: August 31, 2026 (KRW 2,375,000,000, 95% of the sale amount)

Material Event Report / Exchange Reporting Obligation To the Financial Services Commission / Korea Exchange June 30, 2026 Company name: VitzroSys Co., Ltd. CEO: Lee Gi-jae, Lee Hak-yeong Head office address: 513-515, 225 Gasan Digital 1-ro, Geumcheon-gu, Seoul (Gasan-dong, Ace Pohyu) (Phone) 02-460-2000 (Website) http://www.vitzrosys.com Preparer: (Title) CEO (Name) Lee Gi-jae (Phone) 02-460-2000

Decision to Sell Own Convertible Bonds

1. Type of bond: Series 15, unregistered coupon-bearing unsecured private-placement convertible bonds 2. Bond issuance date: October 24, 2024 3. Bond issuance method: Private placement 4. Bond maturity date: October 24, 2027 5. Total face (electronically registered) value of the bonds (KRW): 3,000,000,000 6. Details of early acquisition of the bonds to be sold: face (electronically registered) value of bonds to be sold (KRW): 2,500,000,000; acquisition amount (KRW): 2,558,919,830; reason for acquisition: early acquisition of the bonds before maturity by agreement with the bondholder - partial acquisition on April 27, 2026 - partial acquisition on November 28, 2025 - partial acquisition on October 24, 2025 7. Sale decision date: June 30, 2026 8. Sale amount: KRW 2,500,000,000; basis for determination: determined through negotiation with the buyer, considering the company's overall circumstances 9. Sale proceeds receipt (expected) date: August 31, 2026 10. Purpose of sale: Securing working capital, etc. 11. Matters related to conversion: conversion ratio 100%; conversion price as of the report date (KRW/share): 2,500; type of shares to be issued upon conversion: VitzroSys Co., Ltd. registered common shares; number of shares: 1,000,000; ratio to total shares outstanding: 7.35%; conversion request period: start date October 24, 2025; end date September 24, 2027 12. Whether subject to Fair Trade Commission reporting: Not applicable 13. Other matters material to investment decisions - The above "9. Sale proceeds receipt (expected) date" is the closing date, i.e. the date on which the purchase price (for the convertible bonds) is paid (delivered) under the convertible bond sale and purchase agreement. (1) Down payment receipt date: June 30, 2026 (KRW 125,000,000, 5% of the sale amount) (2) Balance receipt date: August 31, 2026 (KRW 2,375,000,000, 95% of the sale amount) - The "ratio to total shares outstanding" in the above "11. Matters related to conversion" was calculated based on the total shares outstanding as of the sale decision date, including the shares to be issued upon this conversion. - Bondholder's early redemption request right (put option): the bondholder of these bonds may request early redemption before maturity, for all or part of the amount equivalent to the principal of these bonds, on October 24, 2025 (the date one year after the issuance date of these bonds) and on each date falling every three months thereafter (January 24, 2026, April 24, 2026, July 24, 2026, October 24, 2026, January 24, 2027, April 24, 2027, July 24, 2027; the "early redemption payment date"). However, if the early redemption payment date is not a bank business day, redemption shall be made on the following business day, and no interest shall accrue after the early redemption payment date. Early redemption claim amount and request period: the amount the issuer must redeem upon a bondholder's early redemption request is the face value of the relevant bonds for which early redemption is requested, plus the early redemption yield (YTP, 4.0% per annum, compounded quarterly). The bondholder must submit the early redemption request to the issuer from 20 days before to 10 days before the early redemption payment date (the "early redemption request period"). However, if the last day of the early redemption request period is not a bank business day, it is extended to the following business day.

[Early redemption request period (early redemption date) and early redemption rate] 1st: 2025-10-02 to 2025-10-14; redemption date 2025-10-24; rate 102.0302% 2nd: 2026-01-02 to 2026-01-14; redemption date 2026-01-24; rate 102.5505% 3rd: 2026-04-03 to 2026-04-14; redemption date 2026-04-24; rate 103.0760% 4th: 2026-07-03 to 2026-07-14; redemption date 2026-07-24; rate 103.6067% 5th: 2026-10-02 to 2026-10-14; redemption date 2026-10-24; rate 104.1428% 6th: 2027-01-04 to 2027-01-14; redemption date 2027-01-24; rate 104.6842% 7th: 2027-04-02 to 2027-04-14; redemption date 2027-04-24; rate 105.2311% 8th: 2027-07-02 to 2027-07-14; redemption date 2027-07-24; rate 105.7834%

[Matters Related to the Buyer] Uni Holdings Co., Ltd.: relationship to the company or largest shareholder -; selection process: selected considering the investor's intent, payment capacity and timing, etc., to promptly raise needed funds; transactions within 6 months before/after the sale decision -; face value of bonds purchased (KRW): 2,500,000,000; note -

[Where the Buyer Includes a Corporation or Organization] (1) Basic information on the corporation or organization Uni Holdings Co., Ltd.: number of investors 1; representative: Hong Hae-sik, 100%; operator -; largest shareholder - (2) Key financial information for the most recent fiscal year (Unit: KRW million) Fiscal year: December 2025; total assets: 997; revenue: 0; total liabilities: 1,433; net income: -15; total equity: -437; external auditor: -; paid-in capital: 100; audit opinion: -