Current Rating
Rating FAQ
Long-term  :   NR
Short-term  :   --
Outlook  :  --
Issuer Rating History
Rating Date Long-term Rating outlook (credit watch) Short-term Rating
2023/09/27 NR -- --
2014/09/25 twAA- Stable twA-1+
2013/10/01 twAA Negative twA-1+
2007/06/07 twAA Stable twA-1+
2004/06/07 twAA Stable twA-1
2001/10/09 twAA- Stable twA-1
2001/06/19 twAA Negative twA-1
2000/11/09 twAA Stable twA-1
Research Analysis
Publish Date Subject
2023/09/27 Media Release: United Microelectronics Corp. 'twAA-/twA-1+' Ratings Affirmed; Ratings Then Withdrawn At The Company's Request
2022/09/13 Research Update: United Microelectronics Corp. Ratings Affirmed At 'twAA-/twA-1+'; Outlook Stable
2021/09/29 Research Update: United Microelectronics Corp. Ratings Affirmed At 'twAA-/twA-1+'; Outlook Stable
2020/10/29 Bulletin: US$60 Million Fine Ends Financial Uncertainty Over United Microelectronics' Litigation For Theft Of Trade Secrets
2020/09/22 Research Update: United Microelectronics Corp. Ratings Affirmed At 'twAA-/twA-1+'; Outlook Stable
Last 5 Years Issue Rating History
Series Amount
(Million)		 Issue Date Maturity Date
 Coupon Rate
(%)		 Rating Rating Date
None
*Taiwan Ratings maintains continuous surveillance over its ratings and the “Rating date” below refers to the last date on which the ratings/outlook have been changed or the ratings on/off CreditWatch.
*Unless there is a material change in our rating views on a given entity, Taiwan Ratings does not update the “Rating date,” which is accordance with the general international practice for rating disclosures.