【BOTTEN】Disclosure of Material Financial and Business Information Due to Reaching Cautionary Trading Information Disclosure Standards in the Centralized Securities Market, to Facilitate Investor Understanding

1. Date of occurrence of the event: 2026/04/20 2. Cause of occurrence: Recently, there have been unusual trading activities in the company's stock. Currently, the company's finances and operations are all normal. Therefore, relevant financial and business information is disclosed to facilitate investor understanding. The company's financial and business information is explained as follows: 3. Financial and business information: Consolidated Financial Information: Last four quarters cumulative Latest Month Latest Quarter (Q1 2025 to Q4 2025) (March 2026) Year-on-year (Q4 2025) Year-on-year IFRS Audited Self-reported Increase/ IFRS Audited Increase/ ---------- Decrease% ------------ Decrease% -------------- Operating Revenue (Millions): 19.28 (40.26) 75.93 (13.28) 319.90 Pre-tax Net Profit (Millions): 295.13 680.34 (54.48) (33.90) (122.60) Net Profit attributable to Owners of Parent (Millions): 283.60 576.53 (60.89) (9.98) (149.39) Earnings Per Share (NT dollars): 2.96 577.42 ( 0.63) ( 8.62) ( 1.56) 4. Whether there is any material information listed in Article 4 of the "Taiwan Stock Exchange Corporation Procedures for Verification and Disclosure of Material Information of Listed Securities" (If "Yes", please explain): None. 5. Whether there is any press conference for explanation of material information listed in Article 11 of the "Taiwan Stock Exchange Corporation Procedures for Verification and Disclosure of Material Information of Listed Securities": None. 6. For complete financial information, please refer to the Market Observation Post System. Path as follows: (1) Recent revenue and profit/loss information: Basic Information > Essential Version (2) Historical monthly revenue: Operation Status > Monthly Revenue > Monthly Revenue Information after IFRSs adoption (3) Historical profit/loss (audited/reviewed by accountants): Financial Reports > After IFRSs adoption > Consolidated/Separate Reports > Comprehensive Income Statement (4) Historical profit/loss (self-reported voluntary disclosure): Operation Status > Self-reported Profit/Loss Disclosure: 7. Other matters that should be specified: (1) The increase in net profit in March 2026 was mainly due to the recognition of disposal gains from the sale of a subsidiary. (2) The company's operations are all normal. The recent fluctuations in the company's stock price and trading volume are market-driven free trading behaviors. Investors are kindly requested to evaluate carefully.