Material event report (CB call option holder designated)

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MATERIAL REPORT (DESIGNATION OF EXERCISER OF CONVERTIBLE BOND PURCHASE OPTION) Version 6.0 Sungho Electronics Co., Ltd.

MAJOR MATTER REPORT

To: Financial Services Commission Date: September 18, 2026

Company Name: Sungho Electronics Co., Ltd. Representative Director: Park Sung-jae Head Office Address: 1301, 1302, 1401, 205-15 Gasan Digital 1-ro, Geumcheon-gu, Seoul, Republic of Korea Telephone: 02-2104-7530 Website: http://sungho.net

Prepared by: Position: Senior Managing Director Name: Yoo Jae-hun Telephone: 02-2104-7500

**DESIGNATION OF EXERCISER OF CONVERTIBLE BOND PURCHASE OPTION**

1. Type of Bond Series: 20 Type: Unregistered, unsecured, private placement convertible bond

2. Bond Issuance Date August 14, 2026

3. Bond Issuance Method Private placement

4. Bond Maturity Date August 14, 2029

5. Exerciser Designation or Transfer Exerciser designation

6. Details of Convertible Bond Purchase Option Exerciser Designation (Transfer Details) Face value (electronic registration) of convertible bond subject to purchase option exerciser designation (transfer): 2,600,000,000 won (A) Total face value (electronic registration) of the relevant convertible bond: 89,500,000,000 won (B) Designation ratio (%): 2.91 (A/B)

7. Exerciser Designation Date (Transfer Date) September 17, 2026

8. Exerciser Designation Consideration (Transfer Amount) Amount: 78,000,000 won Calculation Basis: 3% of the face value (electronic registration) of the target convertible bond

9. Exerciser Designation Consideration (Transfer Payment) Receipt (Expected) Date -

10. Matters Regarding Conversion Conversion Ratio (%): 100 Conversion Price as of Report Date (won/share): 19,114 Type of Stock to be Issued upon Conversion: Sungho Electronics Co., Ltd. registered ordinary shares Number of Shares: 136,025 Ratio to Total Outstanding Shares (%): 0.18 Conversion Request Period Start Date: August 14, 2027 Conversion Request Period End Date: July 14, 2029

11. Whether Subject to Fair Trade Commission Reporting Not applicable

12. Other Matters for Reference in Investment Decision

[Matters Regarding Call Option (Sell Request Right)]

Seolyong Electronics and others shall have the right to request the underwriters to sell all or part of the bonds to Seolyong Electronics and others or a third party designated by Seolyong Electronics and others (hereinafter "Call Option") on each date corresponding to every three months (hereinafter "Payment Date for Trading Amount") from August 14, 2027 (12 months after the issuance date of the bonds) to February 14, 2028 (18 months after the issuance date; hereinafter "Call Option Exercise Period"; if the last day of the Call Option Exercise Period is not a business day, the next business day shall be the last day), in accordance with the ratio of the amount of bonds underwritten by each underwriter. The amount that Seolyong Electronics and others may exercise the Call Option to the underwriters pursuant to this provision shall be limited to the amount each party is permitted to exercise as stipulated in the Call Option Agreement. However, when a Call Option is granted to the largest shareholder of the issuing company and special-related parties of the largest shareholder (hereinafter "largest shareholder, etc."), the quantity of bonds that the largest shareholder, etc. may purchase shall not exceed the ratio of shares of the issuing company held at the time of issuance of the bonds, and the quantity of bonds that the largest shareholder, etc. may purchase shall be limited to the limit set forth in Article 5-21(3) of the Regulations on Issuance and Disclosure of Securities.

(1) Method of Exercising Call Option:

When Seolyong Electronics and others wish to exercise the Call Option, Seolyong Electronics and others shall exercise the Call Option by notifying the underwriters in writing (hereinafter "Call Option Exercise Notice") from 20 days before to 10 days before the Payment Date for Trading Amount, specifying the Call Option exerciser, the party purchasing the bonds through the exercise of the Call Option, the electronic registration amount of the bonds subject to the Call Option (hereinafter "Bonds Subject to Call Option"), the trading amount, and the Payment Date for Trading Amount, etc. A sales contract for the Bonds Subject to Call Option shall be deemed to have been concluded between the underwriter and Seolyong Electronics and others or a third party designated by Seolyong Electronics and others on the date the Call Option Exercise Notice is delivered to each underwriter. However, for the third Call Option request period, the period shall be from 50 days before to 20 days before the third Payment Date for Trading Amount.

(2) Trading Amount:

The trading amount pursuant to the exercise of the Call Option shall be the sum of the electronic registration amount of the Bonds Subject to Call Option and the amount calculated at an annual compound interest rate of 0.1% from the issuance date of the bonds to the Payment Date for Trading Amount.

Call Option Exercise Schedule Table:

| Period | Call Option Request Period From | Call Option Request Period To | Payment Date for Trading Amount | Interest Rate Applied Upon Call Option Exercise | |--------|--------------------------------|------------------------------|--------------------------------|-----------------------------------------------| | 1st | July 25, 2027 | August 4, 2027 | August 14, 2027 | 100.1000% | | 2nd | October 25, 2027 | November 4, 2027 | November 14, 2027 | 100.1251% | | 3rd | December 26, 2027 | January 25, 2028 | February 14, 2028 | 100.1503% |

※ The above table is the Call Option exercise schedule determined at the time of issuance of the bonds. Bond acquisition pursuant to the purchase option exerciser designation agreement shall target the 2nd and 3rd periods, and the 1st period may be included through written agreement between the parties if the issuing company's written consent and the feasibility of dividing the trading unit of the target bonds are confirmed.

(3) Delivery of Bonds:

Upon receipt of the trading amount, the underwriter shall deliver the Bonds Subject to Call Option to Seolyong Electronics and others (or the third party designated by Seolyong Electronics and others, if applicable) by electronic registration in the electronic registration account pursuant to the Act on Electronic Registration of Stocks, Bonds, etc. If the underwriter fails to deliver the Bonds Subject to Call Option on the Payment Date for Trading Amount, the underwriter shall pay a penalty separate from damages in the amount calculated at an annual rate of 12% on the trading amount from the Payment Date for Trading Amount until the date of actual delivery of the Bonds Subject to Call Option.

(4) Mandatory Holding of Bonds by Bondholders:

The underwriters shall hold 40% of the total electronic registration amount of the bonds in unconverted form during the Call Option Exercise Period to guarantee the exercise of the Call Option by Seolyong Electronics and others pursuant to this provision.

(5) The largest shareholder and special-related parties shall limit the exercise limit of the Call Option to within the shareholding ratio at the time of issuance of the bonds.

**[Selection Process, Transaction Details, and Designation Consideration by Recipient]**

| Recipient Name | Relationship with Company or Largest Shareholder | Selection Process | Designation Date (Transfer Date) | Transaction Details and Plans Within 6 Months Before and After Designation Date | Face Value (Electronic Registration) of Convertible Bond Subject to Purchase Option Transfer or Exerciser Designation (won) | Designation Consideration (Transfer Amount) | Remarks | |---|---|---|---|---|---|---|---| | In Jun-young | Third party | Selected through consultation with the purchase option holder, taking into account the recipient's ability to pay for bond acquisition, etc. |, | | 1,000,000,000 | 30,000,000 |, | | Ahn In-sung | Third party | Selected through consultation with the purchase option holder, taking into account the recipient's ability to pay for bond acquisition, etc. |, | | 1,000,000,000 | 30,000,000 |, | | Moon Ju-young | Third party | Selected through consultation with the purchase option holder, taking into account the recipient's ability to pay for bond acquisition, etc. |, | | 300,000,000 | 9,000,000 |, | | Moon Ju-hwan | Third party | Selected through consultation with the purchase option holder, taking into account the recipient's ability to pay for bond acquisition, etc. |, | | 300,000,000 | 9,000,000 |, |