[Amended] Treasury share disposal: results report

What happened

Treasury Share Disposal: Results Report Korchip Co., Ltd. Amendment Report August 4, 2026

1. Disclosure document subject to amendment: Treasury Share Disposal: Results Report 2. Date of initial submission of the disclosure document subject to amendment: 2026.07.29 3. Amendment details

Item: (c) Type and number of shares disposed of as reported Reason for amendment: Type and number of shares not stated Before amendment: - After amendment: Common shares 10,000 shares

Item: 5. Treasury shares and similar holdings after disposal Reason for amendment: Change in ratio and total value due to incorrect quantity stated Before amendment (Unit: shares, %, KRW thousand): Common shares, holdings under Article 165-3 of the Act (A): Quantity 529,000; Ratio 6.03; Total value 3,983,669; holdings under trust agreements (B): all -; Total (A+B): Quantity 529,000; Ratio 6.03; Amount 3,983,669. Grand total: same figures. After amendment (Unit: shares, %, KRW thousand): Common shares, holdings under Article 165-3 of the Act (A): Quantity 524,900; Ratio 5.99; Total value 3,917,392; holdings under trust agreements (B): all -; Total (A+B): Quantity 524,900; Ratio 5.99; Amount 3,917,392. Grand total: same figures.

Treasury Share Disposal: Results Report To: Governor of the Financial Supervisory Service July 29, 2026

Company name: Korchip Co., Ltd. Representative Director: Son Jin-hyeong Head office address: Korchip Building, 359 Mannan-ro, Manan-gu, Anyang-si, Gyeonggi-do (Anyang-dong) Phone: 031-361-8000 Website: http://www.korchip.com Preparer: (Title) Director (Name) Yoon Dong-jin (Phone) 031-361-8000

1. Name and address of the issuer (a) Name: Korchip Co., Ltd. (b) Address: Korchip Building, 359 Mannan-ro, Manan-gu, Anyang-si, Gyeonggi-do

2. Details of the disposal report (a) Date of submission of the material event report: April 15, 2026 (b) Disposal period: From 2026.06.01 to 2026.08.31 (c) Type and number of shares disposed of as reported: Common shares 10,000 shares

3. Disposal details (Unit: KRW, shares) Date: 2026.07.28; Type: Common shares; Order quantity: -; Disposal quantity: 10,000; Disposal price per share: 18,310; Total disposal amount: 183,100,000; Disposal counterparty: Employee Stock Ownership Association; Entrusted securities firm: -; Financial investment company's unique number: - Total: Disposal quantity 10,000; Disposal price per share 18,310; Total disposal amount 183,100,000

Note 1) The disposal price per share is the market closing price (KRW 18,310) on April 14, 2026, the trading day before the board resolution. Note 2) The disposal was made by transferring the shares directly from the Company's securities account to the account of the Korchip Employee Stock Ownership Association. Note 3) For details of the above disposal, please refer to the "[Amended] Material Event Report (Treasury Share Disposal Decision)" disclosed on June 2, 2026.

4. Whether the disposal report matches the actual disposal Shares planned to be disposed of (shares): Common shares 10,000; Other shares - Total shares actually disposed of (shares): Common shares 10,000; Other shares - Match: Match; Reason for any difference: -

5. Treasury shares and similar holdings after disposal [as of 2026.07.29] (Unit: KRW thousand, shares, %) Common shares, holdings under Article 165-3 of the Act (A): Quantity 524,900; Ratio 5.99; Total value 3,917,392; holdings under trust agreements (B): all -; Total (A+B): Quantity 524,900; Ratio 5.99; Amount 3,917,392. Grand total: same figures.

Note 1) The above ratio is the treasury share ratio relative to total shares issued (8,770,126 shares). Note 2) The total value is based on the acquisition cost (book value) under the moving-average method.