This report does not constitute a rating action. For the latest full analysis on this entity, please see the full analysis " Four Key Formosa Companies ," published Nov. 7, 2025, on RatingsDirect. Ratings Detail (as of August 18, 2026)* Formosa Chemicals&Fibre Corp. Issuer Credit Rating BBB/Negative/-- Taiwan National Scale twAA-/Negative/twA-1+ Senior Unsecured Taiwan National Scale twAA- Issuer Credit Ratings History 03-Jul-2025 Foreign Currency BBB/Negative/-- 30-Oct-2023 BBB+/Negative/-- 16-Oct-2020 BBB+/Stable/-- 03-Jul-2025 Local Currency BBB/Negative/-- 30-Oct-2023 BBB+/Negative/-- 16-Oct-2020 BBB+/Stable/-- 03-Jul-2025 Taiwan National Scale twAA-/Negative/twA-1+ 30-Oct-2023 twAA/Negative/twA-1+ 07-Oct-2021 twAA/Stable/twA-1+ Related Entities Formosa Petrochemical Corp. Issuer Credit Rating BBB/Negative/-- Taiwan National Scale twAA-/Negative/twA-1+ Senior Unsecured Taiwan National Scale twAA- Formosa Plastics Corp. Issuer Credit Rating BBB/Negative/-- Taiwan National Scale twAA-/Negative/twA-1+ Formosa Taffeta