【CIENS】Announces cumulative disposal of the same securities exceeding NT$300 million

1. Security Name: Common stock of Chipbond Technology Corp. 2. Transaction Dates: May 5, 2026 ~ May 12, 2026 3. Board of Directors Approval Date: Not applicable 4. Other Approval Dates: Approval Level: Handled according to company's approval authority. May 12, 2026 5. Transaction Quantity, Unit Price, and Total Transaction Amount: Transaction Quantity: 1,825,000 shares. Unit Price: Average NT$181.52 per share. Total Transaction Amount: NT$331,275,000. 6. Disposal Gain (or Loss) (Not applicable for holders of acquired securities): Disposal Gain: NT$209,566,000. 7. Relationship with the target company of the transaction: None. 8. Cumulative holding of this transaction's securities (including current transaction) up to now, quantity, amount, shareholding ratio, and conditions of restricted rights (e.g., pledge): Cumulative Shares Held: 33,468,000 shares Cumulative Amount Held: NT$2,231,561,000 Shareholding Ratio: 4.49% Conditions of Restricted Rights: None. 9. Proportion of investment in securities listed in Article 3 of the "Regulations Governing Acquisitions or Disposals of Assets by Public Companies" (including current transaction) to the company's total assets and equity attributable to the parent company's owners as per the latest financial statements, and the operating capital amount in the latest financial statements: Proportion to Total Assets: 105.36% Proportion to Equity Attributable to Parent Company Owners: 154.76% Operating Capital: NT$5,976,847,000 10. Specific purpose of acquisition or disposal: To realize capital gains, benefiting overall shareholder equity. 11. Opinions of dissenting directors regarding this transaction: None. 12. Is this transaction a related party transaction: No. 13. Counterparty to the transaction and their relationship with the company: None. 14. Date of supervisor's approval or audit committee's consent: Not applicable. 15. Date of previous announcement of material information regarding the same event: Not applicable. 16. Other matters to be noted: On September 15, 2021, the Board of Directors resolved to allow the partial disposal of Chipbond (6147) common stock, not exceeding an authorized amount of NT$2,500,000,000. (1) Current execution rate: 90.53% (2) Projected cumulative shares held after complete disposal: 32,261,000 shares (calculated based on the closing price on May 12, 2026) (3) Projected cumulative amount held after complete disposal: NT$2,151,143,000 (4) Projected shareholding ratio after complete disposal: 4.33% Keywords: Material Information