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

What happened

VitzroSys / Material Event Report (Decision to Sell Own Convertible Bonds) / (2026.09.30)

Amendment Report September 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: Reason for amendment / Before amendment / After amendment

9. (Expected) receipt date of the sale proceeds: Change of balance payment schedule: September 30, 2026 -> October 30, 2026

13. Other matters for investment reference: Change of balance payment schedule: (2) Balance receipt date: September 30, 2026 (KRW 475,000,000, 95% of the sale amount) -> October 30, 2026 (KRW 475,000,000, 95% of the sale amount)

Material Event Report / Matter Subject to KRX Reporting Obligation To: Financial Services Commission / Korea Exchange June 30, 2026 Company name: VitzroSys Co., Ltd. Representative Directors: Lee Ki-jae, Lee Hak-young Head office address: 513-515, Ace Four Hue, 225 Gasan Digital 1-ro, Geumcheon-gu, Seoul (Gasan-dong) (Phone) 02-460-2000 (Website) http://www.vitzrosys.com Person responsible for preparation: (Title) Representative Director (Name) Lee Ki-jae (Phone) 02-460-2000

Decision to Sell Own Convertible Bonds

1. Type of bonds: Series 14; Type: Bearer-form, interest-bearing, unsecured, privately placed convertible bonds 2. Bond issue date: June 26, 2024 3. Bond issue method: Private placement 4. Bond maturity date: June 26, 2027 5. Total face value (electronically registered) of the bonds (KRW): 3,500,000,000

6. Details of the acquisition before maturity of the bonds to be sold: Face value (electronically registered) of the bonds to be sold (KRW): 500,000,000 Acquisition amount (KRW): 517,304,510 Circumstances of acquisition: Acquisition of bonds before maturity through consultation with the bondholder - Partial acquisition on June 26, 2025

7. Sale decision date: June 30, 2026

8. Sale amount: Amount (KRW): 500,000,000; Basis of calculation: Determined through consultation with the purchaser, considering the Company's overall circumstances

9. (Expected) receipt date of the sale proceeds: October 30, 2026

10. Purpose of sale: Securing working capital, etc.

11. Matters regarding conversion: Conversion ratio (%): 100; Conversion price as of the reporting date (KRW/share): 2,500; Type of shares to be issued upon conversion: VitzroSys Co., Ltd. registered common shares; Number of shares: 200,000; Ratio to total shares (%): 1.56; Conversion request period: Start date June 26, 2025; End date May 26, 2027

12. Whether subject to Fair Trade Commission reporting: Not applicable

13. Other matters for investment reference: - The above "9. (Expected) receipt date of the sale proceeds" is the closing date on which the purchase price is paid (and the convertible bonds delivered) pursuant to the convertible bond sale and purchase agreement. (1) Down payment receipt date: June 30, 2026 (KRW 25,000,000, 5% of the sale amount) (2) Balance receipt date: October 30, 2026 (KRW 475,000,000, 95% of the sale amount) - In "11. Matters regarding conversion" above, the "ratio to total shares (%)" is calculated by including the shares to be issued upon this conversion, based on the total issued shares as of the sale decision date. - Matters regarding the early redemption request right (put option): The bondholder of these bonds may request early redemption, before maturity, of the full amount (rounded down to the nearest won) obtained by multiplying the electronically registered amount for which early redemption is requested by the early redemption rate, on the date one year after the bond issue date, June 26, 2025, and on each date three months thereafter (each the "early redemption payment date"). However, if the early redemption payment date is not a bank business day, redemption will be made on the next business day, and no interest will be calculated after the early redemption payment date.

[Early redemption request period (early redemption date) and early redemption rate] No. 1: Request period 2025-04-27 to 2025-05-27; Redemption date 2025-06-26; Rate 104.0909% No. 2: Request period 2025-07-28 to 2025-08-27; Redemption date 2025-09-26; Rate 105.1522% No. 3: Request period 2025-10-27 to 2025-11-26; Redemption date 2025-12-26; Rate 106.2295% No. 4: Request period 2026-01-25 to 2026-02-24; Redemption date 2026-03-26; Rate 107.3229% No. 5: Request period 2026-04-27 to 2026-05-27; Redemption date 2026-06-26; Rate 108.4328% No. 6: Request period 2026-07-28 to 2026-08-27; Redemption date 2026-09-26; Rate 109.5593% No. 7: Request period 2026-10-27 to 2026-11-26; Redemption date 2026-12-26; Rate 110.7027% No. 8: Request period 2027-01-25 to 2027-02-24; Redemption date 2027-03-26; Rate 111.8632%

[Matters regarding the purchaser] Purchaser name: Uni Holdings Co., Ltd.; Relationship with the company or largest shareholder: -; Selection process: Selected considering the investor's intent, payment capacity, and timing, etc., to promptly raise necessary funds; Transactions within 6 months before/after the sale decision, and plans: -; Face value of bonds purchased (KRW): 500,000,000; Remarks: -

[If the purchaser includes a corporation or organization] (1) Basic information on the corporation or organization Name: Uni Holdings Co., Ltd.; Number of investors: 1; Representative Director (representative partner): Hong Hae-sik, 100%; Largest shareholder (largest investor): -

(2) Key financial information for the most recent fiscal year of the corporation or organization (Unit: KRW million) Fiscal year: 2025; Settlement month: December; Total assets: 997; Revenue: 0; Total liabilities: 1,433; Net income (loss): -15; Total equity: -437; External auditor: -; Capital: 100; Audit opinion: -