[www.umc.com Description 99.1 Announcement on 2017/10/11: Represent subsidiary United Semiconductor (Xiamen) Co., Ltd. to announce related materials on acquisition of machinery and equipment 99.2 Announcement on 2017/10/18: UMC will convene Q3 2017 Investor Conference 99.3 Announcement on 2017/10/25:]

[www.umc.com Description 99.1 Announcement on 2017/08/31: UMC will attend the investor conference on 2017/09/06 99.2 Announcement on 2017/08/31: UMC will attend investor conferences on 2017/09/06 99.3 Announcement on 2017/09/26: Supplement to the unsecured straight corporate bond issuance authorized ]

[www.umc.com Description 99.1 Announcement on 2017/09/15: Change of representative of juristic-person director Change of representative of juristic-person director 1. Date of occurrence of the change: 2017/09/15] [FORM 6-K September 18, 2017 United Microelectronics Corporation ———————————————————————]

[www.umc.com Description 99.1 Announcement on 2017/09/08: The Company received the indictment from Taichung District Prosecutors Office The Company received the indictment from Taichung District Prosecutors Office 1. Parties to the legal matter: UNITED MICROELECTRONICS CORP.] [FORM 6-K September 8, 2]

[www.umc.com Description 99.1 Announcement on 2017/09/06: To clarify media reports on 6 September, 2017. To clarify media reports on 6 September, 2017 1. Date of occurrence of the event: 2017/09/06] [FORM 6-K September 6, 2017 United Microelectronics Corporation ——————————————————————————————————— No]