Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ...

United Microelectronics Corporation (NYSE:UMC) Q1 2019 Earnings Conference Call April 24, 2019 5:00 AM ET Company Participants Michael Lin – Head-Investor Relations Jason Wang – President Chitung Liu – Chief Financial Officer Conference Call Participants Randy Abrams – Credit Suisse Szeho Ng – China Renaissance Roland Shu – Citi Bruce Lu – Goldman Sachs Aaron Jeng – Nomura Securities Charlie Chan – Morgan Stanley Albert Hung – JPMorgan Sebastian Hou – CLSA Julie Tsai – UBS Operator Welcome everyone to UMC’s ...

United Microelectronics Corporation (NYSE:UMC) Q4 2018 Earnings Conference Call January 29, 2019 4:00 AM ET Company Participants Michael Lin - Head of Investor Relations Jason Wang - President Chitung Liu - Chief Financial Officer Conference Call Participants Randy Abrams - Credit Suisse Gokul Hariharan - JPMorgan Szeho Ng - China Renaissance Sebastian Hou - CLSA Charlie Chan - Morgan Stanley Julie Tsai - UBS Operator Welcome everyone to UMC's 2018 Fourth Quarter Earnings Conference Call. All lines have bee ...