[Worldsemi] Disclosure of Financial and Business Information Due to Trading Information Disclosure Standards

1. Date of Fact Occurrence: 2026/04/20 2. Reason for Occurrence: As notified by Taiwan Stock Exchange Corporation. 3. Financial and Business Information: [Table showing Revenue, Pre-tax Net (Loss)/Profit, Current Net (Loss)/Profit, Earnings Per Share for March 2026, Q1 2026, and Last Four Quarters Cumulative] 4. Whether there are any 'Major Information' events listed in Article 4 of the 'Rules Governing the Examination and Disclosure of Material Information by Publicly Listed Companies' (If 'Yes', please explain): None. 5. Whether there is a press conference for 'Major Information' disclosure as listed in Article 11 of the 'Rules Governing the Examination and Disclosure of Material Information by Publicly Listed Companies': None. 6. For complete financial information, please refer to the Market Observation Post System, with paths as follows: (1) Recent revenue and profit/loss information: Basic Information > Highlights (2) Historical Monthly Revenue: Operations Overview > Monthly Revenue > Monthly Revenue Information after adopting IFRSs (3) Historical Profit/Loss (Audited/Reviewed by Accountant): Financial Statements > Post-IFRS Adoption > Consolidated/Separate Statements > Statement of Comprehensive Income (4) Historical Profit/Loss (Voluntary Disclosure of Self-Assessed Figures): Operations Overview > Self-Assessed Profit/Loss Announcement: None. 7. Other Matters to Note: None.