8039 ARTC: Financial Information Disclosed Due to Trading Alert Threshold

Release Date: July 18, 2026 Statement Date: July 17, 2026 Statement Time: 15:38:06 Company Code: 8039 Company Name: ARTC Purpose: Due to the company's securities reaching the public attention threshold on the centralized trading market, significant financial and operational information is disclosed to assist investor understanding. Applicable Clause: Item 51 Event Date: July 17, 2026

Details: 1. Event Date: July 17, 2026 2. Reason: In accordance with notification from the Taiwan Stock Exchange Corporation. 3. Financial and Operational Information:

Period Most Recent Month YoY Change% Most Recent Quarter YoY Change% Last Four Quarters Cumulative Item May 2026 (in %) Q1 2026 (in %) Q2 2025 to Q1 2026 (IFRS Consolidated Self-Reported) (Audited) (Audited) ================================================================================================== Revenue 914.40 1% 2,415.48 8% 10,797.92 (NT$ million) Pre-tax Net Profit 90.78 646% 219.82 109% 729.52 (NT$ million) Net Profit Attributable to Parent 69.45 814% 171.37 108% 623.95 (NT$ million) Earnings Per Share (EPS) 0.26 801% 0.65 104% 2.40 (NT$)

4. Whether there are material events under Article 4 of the 'TSEC Procedures for Verification and Disclosure of Material Information by Listed Companies': No 5. Whether there is a press conference under Article 11 of the same procedures: No 6. Complete financial information is available on the Public Information Observation Station via the following paths: (1) Recent revenue and profit: Basic Information > Highlights (2) Historical monthly revenue: Operations > Monthly Revenue > Monthly Revenue Information (Post-IFRS) (3) Historical profit/loss (audited/reviewed): Financial Statements > Post-IFRS > Consolidated/Individual > Comprehensive Income Statement (4) Historical profit/loss (voluntary self-reported): Operations > Self-Reported Earnings Announcement 7. Other Notes: May 2026 figures are self-reported and unaudited.