Chung Hsin Fiber Announces Material Information Due to Securities Trading Threshold on TWSE

1. Date of Event: July 6, 115 (2026)

2. Reason for Announcement: In accordance with notification from the Taiwan Stock Exchange regarding material information disclosure.

3. Financial and Business Information:

Most Recent Month (Self-compiled, May 115): - Revenue: NT$3,778 million (+9.14% YoY) - Pre-tax Net Profit: NT$865 million (+49.14% YoY) - Net Profit Attributable to Owners of Parent: NT$102 million (+383.33% YoY) - Earnings Per Share (EPS): NT$0.08 (+385.67% YoY)

Most Recent Quarter (Audited/Reviewed, Q1 115): - Revenue: NT$11,170 million (-2.79% YoY) - Pre-tax Net Profit: NT$2,526 million (+21.44% YoY) - Net Profit Attributable to Owners of Parent: NT$228 million (+985.71% YoY) - EPS: NT$0.17 (+750% YoY)

Last Four Quarters Cumulative (Audited/Reviewed, 114Q2 to 115Q1): - Revenue: NT$44,952 million - Pre-tax Net Profit: NT$9,153 million - Net Profit Attributable to Owners of Parent: NT$318 million - EPS: NT$0.24

4. Whether any material information under Article 4 of the TWSE's Procedures for Verification and Disclosure of Material Information by Listed Companies applies: No.

5. Whether any press conference under Article 11 of the same procedures is required: No.

6. Complete financial information is available on the Public Information Observation System with the following paths: (1) Recent revenue and profit: Basic Information > Highlights (2) Historical monthly revenue: Operations > Monthly Revenue > Monthly Revenue under IFRSs (3) Historical profit (audited/reviewed): Financial Statements > Under IFRSs > Consolidated/Individual > Comprehensive Income Statement (4) Historical profit (voluntary self-compiled): Operations > Self-compiled Profit Announcement

7. Other Matters to be Disclosed: None.