Notice of submission of existing share rights due to stock split

The Company has resolved at the regular shareholders' meeting on March 28, 2024 to split 1 share of stock with a value of 5,000 won into 50 shares with a value of 100 won each, so we hereby announce as follows, and ask the shareholders and pledgees who have existing share rights to submit their existing share rights or a certificate of non-issuance of existing share rights within the specified period.

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1. Details of the stock split: Ordinary shares and preferred shares with a par value of 5,000 won will be split into ordinary shares and preferred shares with a par value of 100 won each, and 50 shares each.

2. Period for submitting existing share rights: March 28, 2024 ~ April 28, 2024 (1 month)

3. Place for submitting existing share rights: ATECH Co., Ltd. Headquarters (410 Jungseojin-ro, Seo-gu, Incheon, Unit PT-G03, Cheong-rim green business center)

4. Other: This schedule may be subject to partial changes depending on internal/external factors such as changes in related laws and regulations, consultations with relevant agencies, and internal company circumstances.

March 28, 2024. Taehyung Park, CEO of AETECH Co., Ltd.