【Walsin Technology】Due to the Company's Securities Reaching the Standard for Public Disclosure of Attention Trading Information in the Centralized Securities Market, Relevant Financial and Business Material Information is Hereby Announced to Facilitate Investor Understanding.

1. Date of occurrence of the event: 2026/05/13 2. Reason for occurrence: Handled in accordance with the instructions of the Taiwan Stock Exchange Corporation 3. Financial and Business Information: Period Monthly Quarterly Last four quarters accumulated ======== ========================= ========================= ================= Latest Month vs Last Year Latest Quarter vs Last Year Q2 2025 Item April 2026 Same Period % Q1 2026 Same Period % to Q1 2026 (Consolidated self-audited) (Consolidated audited) (Consolidated audited) ======== ============ =========== ============ =========== ================= Revenue 3,705 16.04% 9,538 9.13% 37,261 (million) Pre-tax net profit 568 585.47% 1,437 50.16% 4,204 (million) Net profit attributable to parent company owners 429 454.55% 820 40.17% 2,533 (million) Earnings per share 0.89 456.00% 1.69 39.67% 5.22 (NTD) 4. Whether there are any material information events listed in Article 4 of the "Taiwan Stock Exchange Corporation Procedures for Verification and Public Disclosure of Material Information for TWSE Listed Companies" (if yes, please explain): No 5. Whether there are any circumstances requiring a press conference for material information explanation as listed in Article 11 of the "Taiwan Stock Exchange Corporation Procedures for Verification and Public Disclosure of Material Information for TWSE Listed Companies": No 6. Complete financial information can be viewed on the Market Observation System, path as follows: (1) Recent revenue and profit/loss information: Basic Information > Highlights (2) Historical monthly revenue: Operational Overview > Monthly Revenue > Monthly Revenue Information after IFRSs adoption (3) Historical profit/loss (audited/reviewed by accountants): Financial Statements > After IFRSs > Consolidated/Individual Statements > Comprehensive Income Statement (4) Historical profit/loss (voluntarily announced self-audited figures): Operational Overview > Self-audited Profit/Loss Announcement 7. Other matters that need to be specified: None.