[www.umc.com Description 99.1 Announcement on 2018/01/17: UMC will convene Q4 2017 Investor Conference 99.2 Announcement on 2018/01/19: Represent subsidiary United Microchip Corporation to announce of acquisition of UNITED SEMICONDUCTOR (XIAMEN) CO., LTD. 99.3 Announcement on 2018/01/24: UMC announce]

[www.umc.com Description 99.1 Announcement on 2018/01/12: UMC has filed a patent infringement lawsuit against Micron Semiconductor (Xi'an) and Micron (Shanghai) Trading Co. in Fuzhou, P.R.C. 1 UMC has filed a patent infringement lawsuit against Micron Semiconductor (Xi'an) and Micron (Shanghai) Tradi]

[www.umc.com Description 99.1 Announcement on 2017/12/13: The board meeting approved capital budget execution 99. 2 Announcement on 2017/12/13: UMC announces board resolution to establish nominating committee 99. 3 Announcement on 2017/12/13: The Board of Directors resolved to release the managerial ]

[www.umc.com Description 99.1 Announcement on 2017/12/06: Micron Technology Inc. filed a civil lawsuit in California accusing UMC of trade secret infringement. Micron Technology Inc. filed a civil lawsuit in California accusing UMC of trade secret infringement 1. Date of occurrence of the event: 2017]

[www.umc.com Description 99.2 Announcement on 2017/11/9: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC United Microelectronics Corporation This is to report the changes or status of 1) Sales volume, 2) Funds lent to other parties, 3) Endorsem]