【Chroma】Announcement: Company's cumulative disposal of marketable securities reached NTD 300 million within one year

1. Security name: Advantech Co., Ltd. Common Stock 2. Transaction dates: 2026/5/7 ~ 2026/5/13 3. Board of Directors' approval date: Not applicable 4. Other approval dates: Approval level: According to delegated authority. May 13, 2026. 5. Transaction volume, unit price, and total transaction amount: Transaction volume (thousands of shares): 3,318; Average price (NTD): 99.87; Total transaction amount (NTD): 331,364,687 6. Disposal gain (or loss) (not applicable to acquisition of marketable securities): Disposal gain (NTD): 128,634,887 7. Relationship with the transacted company: None 8. As of now, the number, amount, shareholding ratio, and restricted rights (e.g., pledge) of this security held (including this transaction): Remaining holdings: 4,565,253 shares; Amount: NTD 278,936,958; Shareholding ratio: 2.10%; Restricted rights: None 9. As of now, the proportion of investment in marketable securities (including this transaction) listed in Article 3 of the "Regulations Governing the Acquisition or Disposal of Assets by Public Companies" to the total assets and equity attributable to owners of the parent in the company's latest financial report, and the amount of working capital in the latest financial report: Proportion to total assets: 29.36%; Proportion to equity attributable to owners of the parent: 39.82%; Working capital amount: 12,840,062 thousand NTD 10. Specific purpose of acquisition or disposal: Investment management 11. Opinions of dissenting directors on this transaction: None 12. This transaction is a related party transaction: No 13. Counterparty and its relationship with the company: Not applicable 14. Date of approval by supervisors or audit committee: Not applicable 15. Date of previous material information announcement on the same event: Not applicable 16. Other matters to be specified: None