Zhen Ding-KY Announces Financial Information Due to Trading Alert Threshold Being Met

1. Date of Event: June 22, 2026 (ROC Year 115) 2. Reason for Disclosure: In accordance with notification from the Taiwan Stock Exchange Corporation. 3. Financial and Business Information: Period (Monthly) (Quarterly) (Last Four Quarters Cumulative) ====================== ======================= ================ Most Recent Month YoY Change% Most Recent Quarter YoY Change% (Q2 2025 to Q1 2026) Item (May 2026) (Q1 2026) (Q1 2026) (IFRSs Consolidated (IFRSs Reviewed (IFRSs Reviewed Preliminary Figure) Figure) Figure) ============ ========= ============ ========== ================ Revenue 16,201 37.40% 40,728 1.61% 183,168 (NT$ million) Pre-tax Profit 1,317 679.16% 2,400 64.78% 15,006 (NT$ million) Net Profit Attributable to Owners of Parent 808 299.23% 1,426 125.41% 7,584 (NT$ million) Earnings Per Share (EPS) 0.75 274.42% 1.33 101.52% 7.58 (NT$) 4. Whether there is any material information under Article 4 of the 'Procedures for Verification and Public Disclosure of Material Information by Listed Companies' by TWSE: No 5. Whether there is any press conference required under Article 11 of the above procedures: No 6. Complete financial information is available on the Public Information Observation Station via the following paths: (1) Recent operating revenue and profit/loss: Basic Information > Summary Version (2) Historical monthly operating revenue: Operations Overview > Monthly Revenue > Monthly Operating Revenue Information (Post-IFRSs) (3) Historical profit/loss (audited/reviewed figures): Financial Statements > Post-IFRSs > Consolidated/Individual Statements > Consolidated Income Statement (4) Historical profit/loss (voluntarily disclosed preliminary figures): Operations Overview > Preliminary Profit/Loss Announcements 7. Other Matters: The company’s operations are normal. Stock price fluctuations in the centralized market are determined by free market trading mechanisms and are not related to the company.