[Description 99.1 Announcement on 2010/12/27: To announce related materials on acquisition of machinery and equipment. 99.2 Announcement on 2010/12/27: To announce related materials on acquisition of machinery and equipment. 99.3 Announcement on 2011/01/04: UMC will attend investor conferences on 2011/01/05 99.4 Announcement on 2011/01/07: Represent subsidiary TOPCELL SOLAR INTERNATIONAL CO., LTD. to announce related information on acquisition of Real estate] [FORM 6-K January 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 20110125 6-K 1 htm_5562.htm LIVE FILING]

[Description 99.1 Announcement on 2010/11/29: To announce related materials on acquisition of machinery and equipment. 99.2 Announcement on 2010/12/06: To announce related materials on acquisition of machinery and equipment. 99.3 Announcement on 2010/12/06: To announce related materials on acquisition of machinery and equipment. 99.4 Announcement on 2010/12/13: Represent subsidiary UMC New Business Investment Corporation to announce the acquisition of TOPCELL] [FORM 6-K December 27, 2010 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 20101224 6-K 1 htm_5520.htm LIVE FILING]

[Description 99.1 Announcement on 2010/10/26: Announcement of Mainland Chinese company investment through subsidiary, UMC Capital Corporation. 99.2 Announcement on 2010/10/27: UMC announced its unconsolidated operating results for the third quarter of 2010 99.3 Announcement on 2010/10/27: Major Resolution from Board Meeting 99.4 Announcement on 2010/11/03: UMC will attend investor conferences on 2010/11/04 99.5 Announcement on 2010/11/03: To announce related materials] [FORM 6-K November 26, 2010 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 20101126 6-K 1 htm_5450.htm LIVE FILING]

[UMC Board of Directors Announces Termination of He Jian Merger Agreement Company will continue to seek possible alternatives with He Jian Shareholders Taipei, Taiwan, R.O.C. – November 18, 2010 Going forward, UMC will continue seeking possible alternatives with He Jian shareholders, including a full or partial acquisition of He Jian in cash upon revaluation. UMC looks forward to successfully integrating] [FORM 6-K November 18, 2010 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 20101118 6-K 1 htm_5427.htm LIVE FILING]

[UNITED MICROELECTRONICS CORPORATION Address: No. 3 Li-Hsin Road II, Hsinchu Science Park, Hsinchu City, Taiwan, R.O.C. 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 Chinese version or difference in interpretation between the two versions, the Chinese language financial statements shall prevail.] [Form 6-K November 17, 2010 United Microelectronics Corporation Hsinchu, Taiwan, R.O.C. No. 3 Li Hsin Road II þ o o o o þ n/a United Microelectronics Corporation Chitung Liu Chief Financial Officer Description 99.1 6-K 1 c08607e6vk.htm FORM 6-K]