Walsin Technology Corporation Announces Major Financial Information Due to Trading Alert Threshold Being Met

1. Date of Fact: 2026/07/21 2. Reason: In accordance with instructions from the Taiwan Stock Exchange Corporation 3. Financial and Business Information:

Period　　　　　Monthly　　　　　　　Quarterly　　　　　Cumulative Last Four Quarters ＝＝＝＝　＝＝＝＝＝＝＝＝＝＝＝　＝＝＝＝＝＝＝＝＝＝＝　＝＝＝＝＝＝＝ Most Recent Month　YoY %　Most Recent Quarter　YoY %　Q2 2025 to Q1 2026 Item　　　Jun 2026　 Q1 2026　 (Consolidated Audited) (Consolidated Preliminary) (Consolidated Audited) ＝＝＝＝　＝＝＝＝＝　＝＝＝＝＝　＝＝＝＝＝　＝＝＝＝＝　＝＝＝＝＝＝＝ Revenue　　3,961 24.36% 9,538 9.13% 37,261 (Million) Pre-tax Net Profit　1,066　 186.56% 1,437 50.16% 4,204 (Million) Net Profit Attributable to Owners of Parent　717 　 112.76% 820 40.17% 2,533 (Million) Earnings Per Share　1.48 114.49% 1.69 39.67% 5.22 (NT$)

4. Whether there is any material information event under Article 4 of the 'Procedures for Verification and Disclosure of Material Information by Listed Companies' of the Taiwan Stock Exchange Corporation: No 5. Whether there is any requirement under Article 11 to hold a press conference for material information: No 6. Complete financial information is available on the Public Information Observation System. Access paths: (1) Recent operating revenue and profit/loss: Basic Information > Highlights (2) Historical monthly revenue: Operations Overview > Monthly Revenue > Monthly Revenue Information under IFRSs (3) Historical profit/loss (audited/reviewed figures): Financial Statements > Under IFRSs > Consolidated/Individual > Consolidated Statement of Comprehensive Income (4) Historical profit/loss (voluntarily disclosed preliminary figures): Operations Overview > Preliminary Earnings Announcements 7. Other Matters to be Disclosed: None