【Quan Xin】Announcement of Corporate Bonds Quan Xin 2 (Code: 24552) and Quan Xin 3 (Code: 24553) Reaching Alert Trading Information Criteria

1. Date of Event: August 6, 2026 (R.O.C. Year 115) 2. Reason for Announcement: In compliance with notification from the Securities Over-The-Counter Exchange Center 3. Convertible Bond Information:

Quan Xin 2 (24552) Convertible Bond Details - Maturity Date: January 23, 2029 (R.O.C. Year 118) - Actual Total Issuance Amount: NT$500,000,000 - Current Issuance Outstanding Balance: NT$220,900,000 (as of July 31, 2026) - Latest Conversion Price: 161.8 - Closing Price of Underlying Stock (2455): 372.0 (August 6, 2026) - Closing Price of Convertible Bond (24552): 238.0 (August 6, 2026)

Quan Xin 3 (24553) Convertible Bond Details - Maturity Date: January 27, 2029 (R.O.C. Year 118) - Actual Total Issuance Amount: NT$500,000,000 - Current Issuance Outstanding Balance: NT$363,800,000 (as of July 31, 2026) - Latest Conversion Price: 152.5 - Closing Price of Underlying Stock (2455): 372.0 (August 6, 2026) - Closing Price of Convertible Bond (24553): 255.0 (August 6, 2026)

4. Other Disclosures: None