[Description 99.1 Announcement on 2012/08/27: UMC will attend investor conferences on 2012/08/29 99.2 Announcement on 2012/08/28: To announce related materials on acquisition of facilities and equipment 99.3 Announcement on 2012/08/28: To announce related materials on acquisition of facilities and equipment 99.4 Announcement on 2012/08/29: To announce related materials on acquisition of machinery and equipment 99.5 Announcement on 2012/08/29: To announce] [FORM 6-K September 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 09/25/2012 6-K 1 htm_7043.htm LIVE FILING]

[UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES CONSOLIDATED FINANCIAL STATEMENTS FOR THE SIX-MONTH PERIODS ENDED JUNE 30, 2012 AND 2011 Address: No. 3 Li-Hsin Road II, Hsinchu Science Park, Hsinchu City, Taiwan, R.O.C. Telephone: 886-3-578-2258 The reader is advised that these financial statements have been prepared originally in Chinese. In the event of a conflict between these financial statements and the original] [FORM 6-K September 11, 2012 United Microelectronics Corporation ——————————————————————————————————— No. 3 Li Hsin Road II ——————————————————————————————————— x x n/a United Microelectronics Corporation Chitung Liu Chitung Liu Chief Financial Officer 6-K 1 umcfs2q12_6k.htm CONSOLIDATED FINANCIAL STATEMENTS 2Q12]

[Description 99.1 Announcement on 2012/08/03:UMC announced the remittance of 2011 cash dividends to shareholders has been postponed to 08/03/2012 due to the typhoon Saola 99.2 Announcement on 2012/08/20:Represent subsidiary UMC New Business Investment Corporation to announce the acquisition of WAVETEK MICROELECTRONICS Corporation Common shares 99.3 Announcement on 2012/08/08: July Revenue 99.4 Announcement on 2012/08/15: the trading and pledge of UMC] [FORM 6-K August 27, 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 08/27/2012 6-K 1 htm_6972.htm LIVE FILING]

[UMC’s Board of Directors Approve to Dissolve and Liquidate Oversea Subsidiary, UMC Japan 1.Date of occurrence of the event:2012/08/21] [FORM 6-K August 21, 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 08/21/2012 6-K 1 htm_6961.htm LIVE FILING]