Formosa Petrochemical Announces Consolidated Revenue for May 2026

1. Date of occurrence: 2026/06/08 2. Company name: Formosa Petrochemical Corporation 3. Relationship with the Company: The Company itself 4. Shareholding ratio: Not applicable 5. Reason for occurrence: Announcement of consolidated revenue for May 2026 6. Countermeasures: None 7. Other matters to be stated: I. Comparison of May 2026 consolidated revenue with April 2026: May 2026 consolidated revenue was NT$57,772.2 million, a decrease of NT$3,745.15 million (6.1%) from NT$61,522.37 million in April 2026. Breakdown: Sales price variance decreased by NT$5.18 billion, sales volume variance increased by NT$1.44 billion. (1) Refining business revenue decreased by 4.1% from the previous month. Sales volume: In May 2026, refinery maintenance-related units gradually restarted and raw material supply stabilized. Crude oil throughput was 11,517 thousand barrels (372 thousand barrels/day, 31 days), an increase of 4,378 thousand barrels from 7,139 thousand barrels (238 thousand barrels/day, 30 days) in the previous month. Total product sales volume was 10,661 thousand barrels, an increase of 1,369 thousand barrels from the previous month. Selling prices: In May 2026, due to emerging hopes for US-Iran peace talks and waning geopolitical premiums, the average Dubai crude oil price was US$103.1/barrel, down US$2.6/barrel from the previous month. High oil prices affected demand for refined products, and with increasing supply in the Asian oil product market, refined product prices fell more than crude oil, resulting in a US$15.6/barrel decrease in the average price of all products compared to the previous month. (2) Olefin business revenue decreased by 3.2% from the previous month. Sales volume: In May 2026, ethylene production was 91,000 metric tons (capacity utilization 33%, 31 days), an increase of 7,000 metric tons from 84,000 metric tons (capacity utilization 32%, 30 days) in the previous month. Total product sales volume was 227,000 metric tons, an increase of 17,000 metric tons from the previous month. Selling prices: In May 2026, the average MOPJ naphtha price was US$988/metric ton, down US$65/metric ton from the previous month. The average price of the four major products decreased by US$115/metric ton from the previous month, including ethylene down US$100/ton, propylene down US$54/ton, butadiene down US$595/ton, and pyrolysis gasoline down US$15/ton. (3) Utility business revenue increased by 13.3% from the previous month, mainly due to increases in electricity and steam sales volumes. II. Comparison of May 2026 consolidated revenue with May 2025: May 2026 consolidated revenue was NT$57,772.2 million, an increase of NT$12,238.19 million (26.9%) from NT$45,539.03 million in May 2025. Breakdown: Sales price variance increased by NT$25.68 billion, sales volume variance decreased by NT$13.44 billion. (1) Refining business revenue increased by 43.9% year-on-year. Sales volume: In May 2026, crude oil throughput was 11,517 thousand barrels (372 thousand barrels/day), a decrease of 900 thousand barrels from 12,417 thousand barrels (401 thousand barrels/day) in the same period last year, mainly due to limited crude supply this year. Total product sales volume was 10,661 thousand barrels, a decrease of 1,859 thousand barrels year-on-year. Selling prices: In May 2026, the average Dubai crude oil price rose by US$39.4/barrel year-on-year, and combined with increased export product margins over crude, the average price of all products increased by US$62.2/barrel year-on-year. (2) Olefin business revenue decreased by 10.0% year-on-year. Sales volume: In May 2026, ethylene production was 91,000 metric tons (capacity utilization 33%), a decrease of 69,000 metric tons from 160,000 metric tons (capacity utilization 59%) in the same period last year. Total product sales volume was 227,000 metric tons, a decrease of 178,000 metric tons year-on-year. Selling prices: In May 2026, the average MOPJ naphtha price increased by US$421/metric ton year-on-year, and the average price of the four major products increased by US$510/metric ton year-on-year, including ethylene up US$535/ton, propylene up US$503/ton, butadiene up US$640/ton, and pyrolysis gasoline up US$461/ton. (3) Utility business revenue decreased by 9.9% year-on-year, mainly due to lower electricity and steam sales volumes.