CAPEX spending in 1Q17 totaled US$564 million. Full year 2017 CAPEX plan is budgeted for US$2.0 billion.

Second Quarter of 2017 Outlook & Guidance

Quarter-over-Quarter Guidance:

• Wafer Shipments: To remain flat
• ASP in USD: To remain flat
• Profitability: Gross profit margin will be in the mid-teens % range
• Foundry Segment Capacity Utilization: Low 90% range
• 2017 CAPEX for Foundry Segment: US$2.0 billion

Recent Developments / Announcements

Apr. 13, 2017		UMC Files Form 20-F for 2016 with US Securities and Exchange Commission
Mar. 14, 2017		UMC and Synopsys Collaboration Speeds 14-nm Custom Design
Feb. 23, 2017		UMC Enters Mass Production for 14nm Customer ICs
Feb. 22, 2017		UMC Board of Directors Announces Proposals for its Annual Shareholders Meeting
Feb. 02, 2017		Panasonic and UMC Partner for 40nm ReRAM Process Platform
Jan. 23, 2017		UMC 4Q 2016 Financial Results

Please visit UMC’s website for further details regarding the above announcements

Conference Call / Webcast Announcement

Wednesday, April 26, 2017

Time: 5:00 PM (Taipei) / 5:00 AM (New York) / 10:00 AM (London)

Dial-in numbers and Access Codes:

USA Toll Free: 1-800 871-3110, 1-888 700-7397

Taiwan Number: 02-2192-8016