Change of largest shareholder

What happened

Copus Korea / Change of largest shareholder / (2026.08.19) Change of largest shareholder

Change of largest shareholder 1. Details of change Pre-change largest shareholder, etc.: Oh Young-seop and 1 other; Shares held (shares): 2,801,498; Ownership ratio (%): 31.22 Post-change largest shareholder, etc.: Artist Studio Co., Ltd.; Shares held (shares): 2,405,487; Ownership ratio (%): 16.37

2. Reason for change: Change due to acquisition of new shares upon completion of payment for a third-party placement capital increase - Change due to acquisition of forfeited shares: No - Mandatory holding period for the transferred shares: No

3. Purpose of equity acquisition: Achieving management objectives such as carrying out the purpose business and improving the financial structure - Funding source: own funds (KRW) 4,509,526,379; borrowed funds (KRW) -; lender -; borrowing period - to -; collateral details - - Plan for appointment/dismissal of officers after acquisition: As the largest shareholder, will decide on matters related to the Company's business execution in a manner consistent with the Company's management objectives.

4. Date of change: 2026-08-19 5. Date change confirmed: 2026-08-19 6. Other matters for investment reference: - This change of largest shareholder arises from the allotment of new shares under a third-party placement and the related share purchase agreement; the date of change is the payment date of the capital increase. - The post-change largest shareholder's number of shares held and ownership ratio above were calculated based on the total number of issued shares (14,691,291 shares) after the third-party placement new share issuance. ※ Related disclosure: 2026-08-19 Securities issuance results (voluntary disclosure) (third-party placement capital increase)

[Details of change] Name (corporation/partnership/other entity) | Relationship | Before: shares/ratio | After: shares/ratio | Note Oh Young-seop: Pre-change largest shareholder; Before: 2,572,787 shares / 28.67%; After: 2,001,498 shares / 13.62%; - Kyung Jin-a: Special related party of pre-change largest shareholder; Before: 228,711 shares / 2.55%; After: - / -; - Artist Studio Co., Ltd.: Post-change largest shareholder; Before: - / -; After: 2,405,487 shares / 16.37%; -

[Matters concerning the post-change largest shareholder (where it is a general corporation)] 1. Basic information of the corporation Corporate name: Artist Studio Co., Ltd. Nationality: Republic of Korea Address (head office location) [town/township/district level only]: Cheongdam-dong, Gangnam-gu, Seoul Corporate registration number: 110111-3629841 Main business: Broadcast video content business

- Status of largest shareholder, CEO, representative executive officer and their equity information Classification | Name | Shares held (shares) | Ownership ratio (%) Largest shareholder: Artist Company Co., Ltd.; 1,812,688; 18.13 CEO: An Hyeong-jo; -; -

- Officer career history of largest shareholder, CEO, representative executive officer Name | Company | Listing status | Delisting date (if delisted) | Position | Date joined | Date left | Note An Hyeong-jo | Artist Studio Co., Ltd. | Listed (KOSDAQ) | - | CEO | 2025-03-31 | - | - An Hyeong-jo | Studio Jidam Co., Ltd. | Unlisted | - | CEO | 2022-12-22 | - | - Lee Tae-seong | Artist Studio Co., Ltd. | Listed (KOSDAQ) | - | Vice President | 2024-10-31 | - | -

- History as largest shareholder of a listed company Name | Company | Listing status | Delisting date | Period as largest shareholder (start/end) | Note - | - | - | - | - / - | -

2. Key financial matters, etc. (Unit: KRW million) Fiscal year: 2025, settlement month December Total assets: 51,829; Capital stock: 4,998; Total liabilities: 2,294; Revenue: 14,618; Total equity: 49,535; Net income (loss): -4,698 External auditor: Samdo Accounting Corporation; Business suspension: No; Audit opinion: Unqualified; Closure of business: No

3. Relationship with the relevant listed company - Relationship between the listed company and the largest shareholder (corporation): - - Relationship between the listed company's officers, etc. and the largest shareholder (corporation): -

4. Transactions between the listed company and the largest shareholder (corporation) in the most recent 3 years (excluding ordinary transactions) Current year: -; Prior year: -; Year before that: -