Formosa Chemicals Announces Consolidated Revenue for June 2026

Release Date: July 10, 2026 Statement Date: July 9, 2026 Time: 14:30:05 Company Code: 1326 Company Name: Formosa Chemicals & Fibre Corporation

Subject: Announcement of Consolidated Revenue for June 2026 Compliance Clause: Item 51 Factual Date: July 9, 2026

Details: 1. Factual Date: July 9, 2026 2. Company Name: Formosa Chemicals & Fibre Corporation 3. Relationship with Company: Parent Company 4. Cross-shareholding Ratio: Not applicable 5. Reason: Announcement of consolidated revenue for June 2026 at NT$27,666,322 thousand 6. Response Measures: None 7. Other Matters to be Disclosed:

I. Comparison of June 2026 Consolidated Revenue with May 2026: (1) June 2026 consolidated revenue was NT$27.666322 billion, an increase of NT$280 million (1.0%) compared to NT$27.3869 billion in May 2026. Volume contributed +NT$3.03 billion, while price contributed -NT$2.75 billion.

(2) Sales Volume Analysis: 1. Formosa Chemicals (Headquarters): +NT$3.786 billion - ARO-3 resumed operations after scheduled maintenance, increasing PX sales and raffinate oil sales to Formosa Plastics Chemical by NT$3.63 billion. - Phenol external sales increased by NT$240 million to avoid price decline risk. - Styrene Monomer (SM) external sales rose NT$200 million due to reduced in-house usage. - Polypropylene (PP) sales dropped NT$280 million due to planned maintenance and weak market demand.

2. Formosa Chemicals Ningbo: -NT$110 million - Raffinate oil sales decreased by NT$330 million due to production adjustments. - Phenol sales down NT$220 million as downstream customers halted operations. - ABS sales dropped NT$80 million due to aggressive pricing by competitors. - PTA-6 resumed operations after maintenance, increasing sales by NT$540 million.

3. Other Subsidiaries: - Fumotex: Sales down NT$290 million due to weakened end-consumer demand from Middle East conflicts, reducing orders from long-fiber fabric brand customers. - Taiwan Acetic Acid: Reduced production line loading per market demand, resulting in NT$170 million decline.

(3) Pricing Environment: U.S.-Iran peace agreement and reopening of the Strait of Hormuz reduced crude oil risk premium and increased supply, leading to a sharp decline in oil prices and petrochemical/plastic raw material prices.

II. Comparison of June 2026 Consolidated Revenue with June 2025: (1) June 2026 revenue of NT$27.666322 billion vs. NT$24.7927 billion in June 2025, an increase of NT$2.873622 billion (+11.6%). Volume contributed -NT$3.5 billion, while price contributed +NT$6.37 billion.

(2) Sales Volume Analysis: 1. Formosa Chemicals (Headquarters): -NT$1.59 billion - PP, ABS, and PS sales declined NT$1.04 billion due to market weakness and maintenance. - PTA, PIA, and OX sales down NT$1.02 billion due to reduced downstream customer demand. - PX sales increased NT$430 million due to improved margins.

2. Formosa Chemicals Ningbo: -NT$1.59 billion - PS and ABS sales down NT$750 million due to market softness. - PTA, PIA, and phenol sales down NT$630 million due to downstream cutbacks. - Raffinate oil sales down NT$180 million due to production adjustments.

3. Fumotex: - Long-fiber fabric sales down NT$270 million due to price competition from mainland China.

(3) Pricing Environment: U.S.-Iran conflict initially drove up crude and petrochemical prices. Although prices reversed after the June peace deal, average prices for major products remained above last year’s levels.