[Description 99.1 Announcement on 2013/02/01: UMC will convene 4Q 2012 investor conference 99.2 Announcement on 2013/02/06: UMC announced its unconsolidated operating results for the fourth quarter of 2012 99.3 Announcement on 2013/02/21: To announce related materials on acquisition of machinery and equipment 99.4 Announcement on 2013/02/08: December Revenue 99.5 Announcement on 2013/02/08: the trading and pledge of UMC common shares] [FORM 6-K February 25, 2013 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 02/25/2013 6-K 1 htm_7438.htm LIVE FILING]