UMC [UNITED MICROELECTRONICS] 6-K: www.umc.com Description 99.1 Announcement on 2018/04/27: To announce
[www.umc.com Description 99.1 Announcement on 2018/04/27: To announce accumulative shares repurchased exceeding NTD$300 million in value 99.2 Announcement on 2018/04/30: To announce accumulative shares repurchased exceeding NTD$300 million in value 99.3 Announcement on 2018/05/03: To announce accumul]