Formosa Plastics Announces Consolidated Sales for June 2026

1. Date of Event: July 9, 115 (2026)

2. Company Name: Formosa Plastics Corporation

3. Relationship with Company (Please enter '本公司' or 'Subsidiary'):本公司 (Parent Company)

4. Cross-shareholding Ratio: Not applicable

5. Reason for Occurrence: Announcement of consolidated sales for June 2026

6. Response Measures: None

7. Other Matters to be Clarified (If the entity involved in the event or resolution is a publicly listed company or above, this material information also qualifies as a matter under Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act that significantly affects shareholders' rights or securities prices):

I. Comparison of Consolidated Sales for June 2026 vs. May 2026:

Consolidated sales for June 2026 amounted to NT$13.97627 billion, a decrease of NT$975.14 million (6.5%) compared to May 2026. Details are as follows:

1. Sales price variance reduction: NT$1.47 billion

On June 17, the U.S. and Iran signed a memorandum of understanding to resolve their conflict, leading to the reopening of the Strait of Hormuz. International crude oil and naphtha prices declined accordingly, causing ethylene and propylene prices to fall in tandem. This weakened market conditions for petrochemical products, resulting in average price declines of 4% to 20% across the company's major products in June 2026 compared to May.

2. Sales volume variance increase: NT$500 million

To accommodate overseas customers' shipping schedules for liquid caustic soda, some orders originally scheduled for May were delayed to June. As a result, the company's liquid caustic soda sales volume in June 2026 increased by 23,000 metric tons compared to May.

II. Comparison of Consolidated Sales for June 2026 vs. June 2025:

Consolidated sales for June 2026 amounted to NT$13.97627 billion, a decrease of NT$385.84 million (2.7%) compared to June 2025. Details are as follows:

1. Sales volume variance reduction: NT$3.75 billion

The outbreak of the U.S.-Iran war disrupted crude oil and naphtha supplies from the Middle East. Formosa Petrochemical Corporation provided raw materials at discounted rates, prompting the company to reduce production rates across various products. Additionally, as Middle East tensions eased in June, customers adopted a more conservative procurement approach. Consequently, the total sales volume of the company's major products in June 2026 decreased by 148,000 metric tons compared to the same period last year.

2. Sales price variance increase: NT$3.37 billion

Following the U.S.-Iran war in late February, crude oil, naphtha, and feedstock ethylene and propylene prices rose, pushing up petrochemical product prices. As a result, the average prices of the company's major products in June 2026 increased by 16% to 63% compared to the same period last year.