[Description 99.1 Announcement on 2012/06/04: To announce related materials on acquisition of facilities and equipment 99.2 Announcement on 2012/06/04: To announce related materials on acquisition of machinery and equipment 99.3 Announcement on 2012/06/06: To announce related materials on acquisition of machinery and equipment 99.4 Announcement on 2012/06/08: The Chinese name change made to UMC Beijing Limited 99.5 Announcement on 2012/06/12:] [FORM 6-K June 25, 2012 United Microelectronics Corporation ——————————————————————————————————— No. 3 Li Hsin Road II ——————————————————————————————————— x x n/a United Microelectronics Corporation Chitung Liu Chitung Liu Chief Financial Officer Description 99 6K on 20120625 6-K 1 htm_6879.htm LIVE FILING]

[Description 99.1 Announcement on 2012/04/26: To annouce the differences for 2011 financial statements between ROC GAAP and US GAAP 99.2 Announcement on 2012/04/30: To announce related materials on acquisition of facilities and equipment 99.3 Announcement on 2012/05/07: UMC will attend investor conferences on 2012/05/08 99.4 Announcement on 2012/05/09: Supplement to the 4th unsecured straight bond issuance authorized by the Board] [FORM 6-K May 25, 2012 United Microelectronics Corporation ——————————————————————————————————— No. 3 Li Hsin Road II ——————————————————————————————————— x x n/a United Microelectronics Corporation Chitung Liu Chitung Liu Chief Financial Officer Description 99 6K on 05/25/2012 6-K 1 htm_6821.htm LIVE FILING]

[Description 99.1 Announcement on 2012/03/28: To announce the registration of capital reduction due to the retirement of certain treasury stocks 99.2 Announcement on 2012/04/06: To announce related materials on acquisition of machinery and equipment 99.3 Announcement on 2012/04/24: UMC will convene 1Q 2012 investor conference 99.4 Announcement on 2012/04/25: The Board of Directors resolved to issue the 4th unsecured straight] [FORM 6-K April 25, 2012 United Microelectronics Corporation ——————————————————————————————————— No. 3 Li Hsin Road II ——————————————————————————————————— x x n/a United Microelectronics Corporation Chitung Liu Chitung Liu Chief Financial Officer Description 99 6K on 04/25/2012 6-K 1 htm_6753.htm LIVE FILING]

[Description 99.1 Announcement on 2012/03/19: To announce related materials on disposal of Springsoft Inc 99.2 Announcement on 2012/03/20: To clarify media reports 99.3 Announcement on 2012/03/21: To announce related materials on acquisition of machinery and equipment 99.4 Announcement on 2012/03/23: To announce related materials on acquisition of machinery and equipment 99.5 Announcement on 2012/03/08: February Revenue 99.6 Announcement on 2012/03/15:] [FORM 6-K March 26, 2012 United Microelectronics Corporation ——————————————————————————————————— No. 3 Li Hsin Road II ——————————————————————————————————— x x n/a United Microelectronics Corporation Chitung Liu Chitung Liu Chief Financial Officer Description 99 6K on 03/26/2012 6-K 1 htm_6676.htm LIVE FILING]

[Description 99.1 Announcement on 2012/02/29: The earthquake recorded in Southern Taiwan on February 26 had no significant impact on the Company’s finance and business 99.2 Announcement on 2012/03/02: To announce related materials on acquisition of machinery and equipment 99.3 Announcement on 2012/03/02: To announce related materials on acquisition of machinery and equipment 99.4 Announcement on 2012/03/05: To announce related materials] [FORM 6-K March 14, 2012 United Microelectronics Corporation ——————————————————————————————————— No. 3 Li Hsin Road II ——————————————————————————————————— x x n/a United Microelectronics Corporation Chitung Liu Chitung Liu Chief Financial Officer Description 99 6K on 03/14/2012 6-K 1 htm_6642.htm LIVE FILING]