Treasury share disposal: results report

What happened

Treasury Share Disposal Results Report / Dual Co., Ltd.

To the Governor of the Financial Supervisory Service July 9, 2026 Company name: Dual Co., Ltd. CEO: Jo In-hoe, Jeong Jae-yeol Head office: 12F, Doosan Building, 726 Eonju-ro, Gangnam-gu, Seoul Phone: 02-6922-7272; Website: http://www.idual.co.kr Preparer: Title Head of Finance Office, Name Jeong In-kyung, Phone 02-6922-7133

1. Name and address of issuer a. Name: Dual Co., Ltd. b. Address: 12F, Doosan Building, 726 Eonju-ro, Gangnam-gu, Seoul

2. Disposal report details a. Material event report filing date: July 8, 2026 b. Disposal period: July 9, 2026 to July 9, 2026 c. Type and number of shares disposed of: Dual Co., Ltd. common shares, 286,740 shares

3. Disposal details (Unit: KRW, shares) July 9, 2026: Common shares; order quantity -, disposed quantity 286,740; price per share KRW 3,675; total disposal value KRW 1,053,769,500; counterparty Jeong Jae-yeol; brokerage firm - Total: disposed quantity 286,740; price per share KRW 3,675; total disposal value KRW 1,053,769,500

Note: The "price per share" above is stated as the closing price on the business day preceding the board resolution date (2026.07.07). Note: The above disposal was conducted by transferring shares from the Company's stock account to the recipient's account.

4. Whether the disposal report matches the actual disposal Common shares: planned for disposal 286,740, other shares -; actual total disposed common 286,740, other -; Match: Match; Reason for any difference: -

5. Treasury shares held after disposal [as of July 9, 2026] (Unit: KRW, shares, %) Common shares: holdings under Article 165-3 of the FSCMA (A): quantity 26,310, ratio 0.09%, total value KRW 87,855,438; holdings under trust contract under Article 165-3 (B): -; Total (A+B): quantity 26,310, ratio 0.09%, amount KRW 87,855,438 Total: quantity 26,310, ratio 0.09%, total value KRW 87,855,438; (B): -; Total (A+B): quantity 26,310, ratio 0.09%, amount KRW 87,855,438