UMC [UNITED MICROELECTRONICS] 6-K: www.umc.com Description 99.1 Announcement on 2017/05/19: UMC will
[www.umc.com Description 99.1 Announcement on 2017/05/19: UMC will attend investor conferences on 2017/05/24 99.2 Announcement on 2017/05/19: Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on acquisition of machinery and equipment 99.3 Announcement on 2017/0]