Formosa Petrochemical Announces Consolidated Revenue for July 2026

1. Date of Event: August 7, 115 (2026) 2. Company Name: Formosa Petrochemical Corporation 3. Relationship with Company (Please enter '本公司' or 'Subsidiary'):本公司 (Our Company) 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: Announcement of consolidated revenue for July 2026 6. Response Measures: None 7. Other Matters to be Disclosed (If the entity involved in the event or resolution is a publicly issued company or above, this major 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 revenue for July 2026 versus June 2026: The consolidated revenue for July 2026 amounted to NT$74.82 billion, an increase of NT$11.14 billion (17.5%) compared to NT$63.68 billion in June 2026. Breakdown: NT$9.04 billion from volume differences, NT$2.10 billion from price differences.

(1) Refining Business Revenue increased by 12.1% month-on-month. Sales Volume: Crude oil refining volume in July 2026 was 14,694 thousand barrels (474 thousand barrels/day over 31 days), up 677 thousand barrels from 14,017 thousand barrels (467 thousand barrels/day over 30 days) in the previous month, primarily due to ongoing crude deliveries. Total product sales volume was 15,557 thousand barrels, up 1,414 thousand barrels from 14,143 thousand barrels in June. Sales Price: With the resumption of U.S.-Iran peace talks, international oil prices gradually declined. The average Dubai crude oil price in July 2026 was USD 76.7/barrel, down USD 2.8/barrel from the previous month. However, refined product supply from the Middle East remained tight, and Northeast Asian refineries adopted more conservative export strategies, pushing up spot prices for refined products. As a result, the average product selling price increased by USD 1.5/barrel compared to the previous month.

(2) Olefins Business Revenue increased by 29.7% month-on-month. Sales Volume: Ethylene production in July 2026 was 93,000 tons (capacity utilization rate 34%, 31 days), up 2,000 tons from 91,000 tons (33%, 30 days) in June. Total product sales volume in July was 254,000 tons, up 69,000 tons from 185,000 tons in June. Sales Price: The average MOPJ naphtha price in July 2026 was USD 767/ton, up USD 42/ton from the previous month. However, downstream petrochemical demand remained sluggish, causing the average price of the four main products to decrease by USD 49/ton (ethylene -USD 40/ton, propylene -USD 72/ton, butadiene -USD 207/ton, pygas -USD 19/ton).

(3) Utilities Business Revenue increased by 15% month-on-month, mainly due to increases in both electricity selling price and volume compared to the previous month.

II. Comparison of consolidated revenue for July 2026 versus July 2025: The consolidated revenue for July 2026 was NT$74.82 billion, up NT$18.29 billion (32.3%) from NT$56.53 billion in July 2025. Breakdown: NT$6.34 billion decrease from volume differences, NT$24.63 billion increase from price differences.

(1) Refining Business Revenue increased by 41.8% year-on-year. Sales Volume: Crude oil refining volume in July 2026 was 14,694 thousand barrels (474 thousand barrels/day), down 1,299 thousand barrels from 15,993 thousand barrels (516 thousand barrels/day) in the same period last year, mainly due to crude delivery schedules. Total product sales volume was 15,557 thousand barrels, down 1,510 thousand barrels from 17,067 thousand barrels last year. Sales Price: The average Dubai crude oil price in July 2026 was USD 5.8/barrel higher than the same period last year. Combined with a significant widening of export product premiums over crude prices, the average product selling price increased by USD 36.9/barrel year-on-year.

(2) Olefins Business Revenue decreased by 22.3% year-on-year. Sales Volume: Ethylene production in July 2026 was 93,000 tons (34% utilization), down 63,000 tons from 156,000 tons (57%) last year. Total product sales volume was 254,000 tons, down 161,000 tons from the same period last year. Sales Price: The average MOPJ naphtha price in July 2026 was USD 189/ton higher than the same period last year. The average price of the four main products increased by USD 162/ton year-on-year (ethylene +USD 160/ton, propylene +USD 205/ton, butadiene +USD 173/ton, pygas +USD 189/ton).

(3) Utilities Business Revenue increased by 0.5% year-on-year, primarily due to higher electricity and steam selling prices compared to the same period last year.