Formosa Taffeta Co., Ltd. Announces Plan to Dispose of Idle Land

1. Name and Nature of the Subject Matter (e.g., land in XX Section, XX Subsection, North District, Taichung City): 4 plots of land, including parcel 668, in Xuculiao Subsection, Xuculiao Section, Mailiao Township, Yunlin County. 2. Date of Occurrence of the Event: 2026/5/8 ~ 2026/5/8 3. Date of Approval by the Board of Directors: May 8, 2026 (Republic of China calendar year 115) 4. Other Resolution Dates: Not applicable 5. Quantity, Unit Price, and Total Transaction Amount (e.g., XX square meters, equivalent to XX ping): Quantity: 4 plots of land totaling 16,796.01 ping; Unit price: NTD 19,000 per ping; Total transaction amount: NTD 319,124,380 6. Counterparty and its Relationship with the Company (If the counterparty is a natural person and not a related party of the company, disclosure of their name may be omitted): Mailiao Power Corporation; Is a substantial related party of the company 7. If the counterparty is a related party, the reason for selecting the related party as the transaction object, the previous owner, the relationship between the previous owner and the company and the counterparty, the date of the previous transfer, and the transfer amount should also be announced: To cooperate with Mailiao Power Corporation's need to establish a solar power plant; Previous owner: Not applicable 8. If the owner of the transaction target was a related party of the company within the past five years, the acquisition and disposal dates, prices, and relationship with the company at the time of the transaction for the related party should also be announced: Not applicable 9. Expected disposal gain (or loss) (not applicable for asset acquisition) (if deferred, list and explain the recognition status): Expected NTD 267,422,697 10. Delivery or Payment Terms (including payment period and amount), Contractual Restrictions, and Other Important Covenants: Handled according to the real estate sales contract; Contractual restrictions: None; Other important covenants: None 11. Method of determining this transaction (e.g., tender, price comparison, or negotiation), reference basis for price determination, and decision-making unit: Method of determining this transaction, reference basis for price determination: The buyer and seller negotiate and determine the price based on market conditions and appraisal reports. 12. Name of professional appraiser firm or company and its appraisal amount: Jing Rui Real Estate Appraisal Joint Office; Appraisal amount NTD 312,405,786 13. Name of professional appraiser: Wang Fu-Sheng 14. Professional appraiser's practice certificate number: (100) Zhong Shi Di Gu Zi No. 000014 15. Is the appraisal report for a limited price, specific price, or special price: No or not applicable 16. Has the appraisal report not yet been obtained: No or not applicable 17. Reason for not yet obtaining the appraisal report: Not applicable 18. If there is a significant difference in the appraisal result, the reason for the difference and the accountant's opinion: Not applicable 19. Accounting firm name: Not applicable 20. Accountant's name: Not applicable 21. Accountant's practice certificate number: Not applicable 22. Broker and brokerage fees: None 23. Specific purpose or use of acquisition or disposal: Disposal of idle land 24. Opinions of dissenting directors on this transaction: Not applicable 25. Is this transaction a related party transaction: Yes 26. Date of approval by supervisors or audit committee: May 8, 2026 (Republic of China calendar year 115) 27. Is this transaction the acquisition of real estate or its right-of-use assets from a related party: No 28. Price evaluated according to Article 16 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies": Not applicable 29. If the price evaluated in the preceding item is lower than the transaction price, the price evaluated according to Article 17 of the same regulations: Not applicable 30. Date of major announcement previously issued for the same event: Not applicable 31. Other matters to be specified: None Keywords: Material Information