【Significant Volume】Due to Our Securities Reaching the Threshold for Public Attention in the Centralized Market, We Are Disclosing Material Financial and Business Information for Investor Clarity

1. Factual Date: 115/06/25

2. Reason: In response to a notification from the Taiwan Stock Exchange, we are disclosing material information.

3. Financial and Business Information:

Monthly Quarterly Last Four Quarters Period Most Recent Month vs. YoY Most Recent Quarter vs. YoY From 114 Q2 May 115 % Change Q1 115 % Change to Q1 115 Item Consolidated N/A Consolidated N/A Consolidated Preliminary Data Reviewed Data Audited/Reviewed Data

Operating Revenue 956 120.27% 1,946 130.66% 6,180 (Million)

Pre-tax Net Profit 244 355.76% 425 258.66% 1,278 (Million)

Net Profit Attributable to Parent Company 163 388.98% 282 213.49% 908 (Million)

Earnings Per Share 1.83 381.58% 3.19 212.75% 10.30 (NT$)

4. Whether there are material events under Article 4 of the 'Taiwan Stock Exchange Corporation Procedures for Verification and Public Disclosure of Material Information by Listed Companies': No

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

6. Complete financial information is available on the Public Information Observation Station. Access paths: (1) Recent operating revenue and profit/loss: Basic Information > Summary Version (2) Historical monthly operating revenue: Business Overview > Monthly Revenue > Monthly Operating Revenue Information (Post-IFRS) (3) Historical profit/loss (auditor-reviewed/audited data): Financial Statements > Post-IFRS > Consolidated/Individual > Comprehensive Income Statement (4) Historical profit/loss (voluntary preliminary data): Business Overview > Preliminary Earnings Announcements

7. Other Matters to Note: None