[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]

[Description 99.1 Announcement on 2012/01/31: To announce related materials on acquisition of machinery and equipment 99.2 Announcement on 2012/02/01: To clarify reports on Commercial Times on February 1, 2012 99.3 Announcement on 2012/02/07: UMC will convene 4Q 2011 investor conference 99.4 Announcement on 2012/02/08: UMC announced its unconsolidated operating results for the fourth quarter of 2011 99.5 Announcement on 2012/02/16:] [FORM 6-K February 29, 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 02/29/2012 6-K 1 htm_6587.htm LIVE FILING]

[Description 99.1 Announcement on 2011/12/27: To announce related materials on acquisition of machinery and equipment 99.2 Announcement on 2012/01/02: To announce related materials on acquisition of machinery and equipment 99.3 Announcement on 2012/01/03: To announce related materials on acquisition of machinery and equipment 99.4 Announcement on 2012/01/04: To announce related materials on disposal of SandForce, Inc. on behalf of UMC] [FORM 6-K January 30, 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 01/30/2012 6-K 1 htm_6498.htm LIVE FILING]

[Description 99.1 Announcement on 2011/12/02: Mainland Chinese company investment on behalf of subsidiary, TLC Capital Co., LTD. 99.2 Announcement on 2011/12/05: To announce related materials on acquisition of machinery and equipment 99.3 Announcement on 2011/12/05: To announce related materials on acquisition of machinery and equipment 99.4 Announcement on 2011/12/12: To announce related materials on acquisition of machinery and equipment 99.5] [FORM 6-K December 26, 2011 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 20111226 6-K 1 htm_6415.htm LIVE FILING]

[Description 99.1 Announcement on 2011/10/26: UMC announced its unconsolidated operating results for the third quarter of 2011 99.2 Announcement on 2011/10/26: To announce related materials on acquisition of machinery and equipment 99.3 Announcement on 2011/10/26: To announce related materials on acquisition of UMC New Business Investment Corporation common shares 99.4 Announcement on 2011/11/04: UMC will attend investor conferences on 2011/11/07] [FORM 6-K November 25, 2011 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 11/25/2011 6-K 1 htm_6317.htm LIVE FILING]