[Formosa Petrochemical] Announcement: Derivative Financial Product Transactions Reached Loss Limit

1. Contract Type: Forward Contract 2. Date of Fact Occurrence: 2026/4/8 3. Contract Amount: USD 124,049,300 4. Deposit or Premium Amount: None 5. Total or Individual Contract Loss Limit Set by Handling Procedures: Individual contract losses for energy futures and derivative products are limited to USD 5 million; total contract losses are limited to USD 11 million. 6. Reason for Engaging in Derivative Transactions: For hedging purposes 7. Hedged Items: Crude oil and refined oil 8. Amount of Hedged Positions: USD 122,430,900 9. Profit and Loss Status of Hedged Items: Realized and unrealized losses USD 48,180,500 10. Loss Amount Assessed at Fair Value (Including Realized and Unrealized): USD 48,180,500 11. Cause of Loss and Impact on the Company: Our company's derivative energy product transactions are purely for hedging. Due to the significant increase in spot prices of crude oil and refined oil caused by the US-Iran war, unrealized losses on forward contracts reached the loss limit. As this is a hedging transaction, it has no significant impact on the company. 12. Contract Period: January 2026 - December 2027 13. Contractual Restrictions: None 14. Other Important Agreements: None 15. Other Matters to Note: None