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

What happened

Material Event Report (Decision to Redeem Own Convertible Bonds Before Maturity), Form 6.0 Sungho Electronics Co., Ltd., Amendment Report July 31, 2026

1. Disclosure document being amended: Material Event Report (Decision to Redeem Own Convertible Bonds Before Maturity) 2. Original filing date of the disclosure document being amended: June 9, 2026 3. Amendment details Item 8 (Acquisition amount - (Scheduled) payment date): Reason for amendment - corrected the date from the trade date to the payment date, reflecting the payment-date provision of the call-option agreement; Before amendment: August 1, 2026; After amendment: August 3, 2026 Item 15 (Other matters for investment reference - added reason for the Item 8 payment-date amendment): Before amendment: (newly added); After amendment: "The '(scheduled) payment date' under '8. Acquisition amount' is stated as August 3, 2026 (Monday), the next business day, considering that the trade date under the call option falls on August 1, 2026 (Saturday), and the contractual provision that payment is made on the next business day if the payment date is not a bank business day."

Material Event Report / Exchange Reporting Obligation To: Financial Services Commission / Korea Exchange June 9, 2026 Company name: Sungho Electronics Co., Ltd. Representative Director: Park Seong-jae Head office address: 205-15 Gasan Digital 1-ro, Units 1301, 1302, 1401, Geumcheon-gu, Seoul (Gasan-dong, SH Dream Tower) Phone: 02-2104-7532 Website: http://www.sungho.net Preparer: (Title) Director in charge of disclosure; (Name) Yoo Jae-hoon; (Phone) 02-2104-7532

Decision to Redeem Own Convertible Bonds Before Maturity 1. Type of bonds: Round 17; Type: Convertible bonds 2. Bond issuance date: August 1, 2025 3. Bond issuance method: Private placement 4. Bond maturity date: August 1, 2028 5. Total face value of bonds (electronically registered) (KRW): 5,000,000,000 6. Face value of bonds subject to acquisition (electronically registered) (KRW): 5,000,000,000 7. Acquisition decision date: June 9, 2026 8. Acquisition amount: KRW 5,228,825,000; Basis of calculation: principal and interest; (Scheduled) payment date: August 3, 2026; Source of acquisition funds: own funds 9. Acquisition method: Over-the-counter purchase 10. Reason for acquisition before maturity: Exercise of the issuer's call option 11. Future handling plan: Decision to retire or resell to be made by the board after acquisition 12. Matters concerning conversion: conversion ratio 100%; conversion price per share as of report date KRW 1,150; shares to be issued upon conversion: Sungho Electronics Co., Ltd. registered common shares; number of shares 4,347,826; ratio to total shares 6.13%; conversion request period August 1, 2026 to July 1, 2028 13. Remaining face value of bonds after acquisition (electronically registered) (KRW): 0 14. Subject to Fair Trade Commission reporting: Not applicable 15. Other matters for investment reference - The "amount" under "8. Acquisition amount" was calculated by applying the 104.5765% yield specified in the call-option agreement to the bonds' face value. - The "(scheduled) payment date" under "8. Acquisition amount" is stated as August 3, 2026, the next business day, considering that the call-option trade date (August 1, 2026) falls on a Saturday, and the contractual provision that payment is made on the next business day if the payment date is not a bank business day. - The "conversion ratio" and "shares to be issued upon conversion" under "12. Matters concerning conversion" are prepared assuming that the convertible bonds to be acquired this time are converted.

[Matters Concerning the Seller] Prime Asset Management Co., Ltd.: Relationship to company/largest shareholder -; Basis for selection: bondholder; transactions/plans within 6 months -; Face value of bonds sold (KRW): 500,000,000; Note - Artman Asset Management Co., Ltd.: -; bondholder; -; 1,000,000,000; - LX Asset Management Co., Ltd.: -; bondholder; -; 1,000,000,000; - iTrust Asset Management Co., Ltd.: -; bondholder; -; 1,000,000,000; - Soosung Asset Management Co., Ltd.: -; bondholder; -; 1,500,000,000; - Total: -; -; -; 5,000,000,000; -