Formosa Plastics Announces Consolidated Revenue for July 2026

1. Date of Fact: 115/08/07 2. Company Name: Taiwan Plastic Industrial Co., Ltd. 3. Relationship with Company (Please enter '本公司' or 'Subsidiary'):本公司 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: Announcement of the Company's consolidated operating revenue for July 2026 6. Response Measures: None 7. Other Matters to be Disclosed (If the subject of the event or resolution is a publicly issued company or above, this major information also meets the criteria under Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act regarding matters that significantly affect shareholders' rights or securities prices):

I. Comparison of consolidated operating revenue for July 2026 versus June 2026: The consolidated operating revenue for July 2026 amounted to NT$15.29392 billion, an increase of NT$1.31765 billion compared to June 2026, representing a 9.4% growth. Details are as follows:

1. Sales volume variance contributing +NT$2.76 billion: In July, ethylene feedstock supply from Formosa Petrochemical Corporation increased compared to June, raising our plant utilization rates. Additionally, on July 7, renewed U.S.-Iran conflict heightened downstream customers’ expectations of rising petrochemical prices, boosting their willingness to purchase. As a result, total sales volume of our major products in July 2026 increased by 78,000 metric tons compared to June.

2. Sales price variance contributing -NT$1.45 billion: On June 17, the U.S. and Iran signed a memorandum of understanding for reconciliation, causing international crude oil, naphtha, ethylene, and propylene prices to decline, which affected petrochemical market conditions in July. Consequently, the average selling prices of our major products in July 2026 decreased by 8–15% compared to June.

II. Comparison of consolidated operating revenue for July 2026 versus July 2025: The consolidated operating revenue for July 2026 amounted to NT$15.29392 billion, an increase of NT$696.87 million compared to July 2025, representing a 4.8% growth. Details are as follows:

1. Sales price variance contributing +NT$3.33 billion: In late February of this year, the outbreak of war between the U.S. and Iran caused crude oil, ethylene, and propylene feedstock prices to rise, pushing up petrochemical product prices. Therefore, the average selling prices of our major products in July 2026 increased by 9–55% compared to the same period last year.

2. Sales volume variance contributing -NT$2.64 billion: In July, due to recurring developments in the U.S.-Iran conflict, Formosa Petrochemical implemented discounted ethylene supply, reducing our plant utilization rates compared to the same period last year. As a result, total sales volume of our major products in July 2026 decreased by 178,000 metric tons compared to the same month last year.