[Description 99.1 Announcement on 2011/06/07: To announce related materials on acquisition of facilities and equipment 99.2 Announcement on 2011/06/13: To announce related materials on acquisition of machinery and equipment 99.3 Announcement on 2011/06/15: Important Resolutions from UMC’s 2011 Annual General Meeting 99.4 Announcement on 2011/06/20: To announce related materials on acquisition of machinery and equipment 99.5 Announcement on 2011/06/21: To] [FORM 6-K June 27, 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 20110627 6-K 1 htm_5915.htm LIVE FILING]

[Description 99.1 Announcement on 2011/04/26: Represent subsidiary EverRich Energy Corporation and JenEnergy System Corp. to announce related materials on merger 99.2 Announcement on 2011/04/26: UMC will convene 1Q 2011 investor conference 99.3 Announcement on 2011/04/27: UMC announced its unconsolidated operating results for the first quarter of 2011 99.4 Announcement on 2011/04/27: UMC announces board resolution to amend partial acquisition offer] [FORM 6-K May 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 20110601 6-K 1 htm_5857.htm LIVE FILING]

[UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE-MONTH PERIODS ENDED MARCH 31, 2011 AND 2010 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 consolidated financial statements have been prepared originally in Chinese. In the event of a conflict between these financial statements and the] [FORM 6-K April 29, 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 99.1]

[Description 99.1 Announcement on 2011/04/01: To announce related materials on acquisition of machinery and equipment 99.2 Announcement on 2011/04/01: To announce related materials on acquisition of machinery and equipment 99.3 Announcement on 2011/04/06: To announce related materials on acquisition of machinery and equipment 99.4 Announcement on 2011/04/08: To announce related materials on acquisition of machinery and equipment 99.5 Announcement on] [FORM 6-K April 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 20110426 6-K 1 htm_5766.htm LIVE FILING]

[Description 99.1 Announcement on 2011/03/21: To announce related materials on acquisition of machinery and equipment 99.2 Announcement on 2011/03/08: February Revenue 99.3 Announcement on 2011/03/15: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC 1 To announce related materials on acquisition of machinery and equipment 1. Name and nature of the subject] [FORM 6-K March 28, 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 20110328 6-K 1 htm_5705.htm LIVE FILING]