⁽¹⁾ One 6-inch wafer is converted into 0.25 (6²/12²) 12-inch equivalent wafer; one 8-inch wafer is converted into 0.44 (8²/12²) 12-inch equivalent wafers. Total capacity figures are expressed in 12-inch equivalent wafers.

CAPEX

CAPEX spending in 3Q24 totaled US$688 million. 2024 cash-based CAPEX budget will be US$3.0 billion.

Capital Expenditure by Year - in US$ billion
Year	2023	2022	2021	2020	2019
CAPEX	$ 3.0	$ 2.7	$ 1.8	$ 1.0	$ 0.6

2024 CAPEX Plan
8"	12"	Total
5%	95%	US$3.0 billion

Fourth Quarter 2024 Outlook & Guidance

Quarter-over-Quarter Guidance:

• Wafer Shipments: Will remain flat
• ASP in USD: Will remain flat
  NTD appreciation will lead to a decline in our reported Q4 NTD revenue
• Gross Profit Margin: Will be close to 30%
• Capacity Utilization: high-60% range
• 2024 CAPEX: US$3.0 billion

Recent Developments / Announcements

Apr. 25, 2024	UMC Files Form 20-F for 2023 with US Securities and Exchange Commission
Apr. 30, 2024	UMC Achieves Highest Corporate Governance Ranking among Taiwan Listed Companies for 10th Consecutive Year
May 2, 2024	UMC Introduces Industry’s First 3D IC Solution for RFSOI, Accelerating Innovations in the 5G Era
May 21, 2024	UMC’s Singapore Fab 12i Celebrates First Tool Move-In for New Phase 3 Expansion
May 30, 2024	UMC Shareholders Elect 16th Term of Directors at Annual Shareholders’ Meeting
Jun. 20, 2024	UMC Launches Most Advanced 22nm eHV Platform to Power Next-Generation Smartphone Displays

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

Conference Call / Webcast Announcement

Wednesday, October 30, 2024

Time: 5:00 PM (Taipei) / 5:00 AM (New York) / 9:00 AM (London)

Dial-in numbers and Access Codes:
Taiwan Number:		02 3396 1191
Taiwan Toll Free:		0080 119 6666
US Toll Free:		+1 866 212 5567
Other Areas:		+886 2 3396 1191
Access Code:		1116030#

A live webcast and replay of the 3Q24 results announcement will be available at

www.umc.com under the “Investors / Events” section.

About UMC

UMC (NYSE: UMC, TWSE: 2303) is a leading global semiconductor foundry company. The company provides high-quality IC fabrication services, focusing on logic and various specialty technologies to serve all major sectors of the electronics industry. UMC’s comprehensive IC processing technologies and manufacturing solutions include Logic/Mixed-Signal, embedded High-Voltage, embedded Non-Volatile-Memory, RFSOI, BCD etc. Most of UMC’s 12-in and 8-in fabs with its core R&D are in Taiwan, with additional ones throughout Asia. UMC has a total of 12 fabs in production with a combined capacity of more than 400,000 wafers per month (12-in equivalent), and all of them are certified with IATF 16949 automotive quality standards. UMC is headquartered in Hsinchu, Taiwan, plus local offices in the United States, Europe, China, Japan, Korea, and Singapore, with a worldwide total of 20,000 employees. For more information, please visit: http://www.umc.com.

Safe Harbor Statements

This press release contains forward-looking statements within the meaning of Section 27A of the United States Securities Act of 1933, as amended, and Section 21E of the United States Securities Exchange Act of 1934, as amended, and as defined in the United States Private Securities Litigation Reform Act of 1995. These forward-looking statements include, but are not limited to, statements regarding anticipated financial results for the third quarter of 2024; the expected wafer shipment and ASP; the anticipated annual budget; capex strategies; environmental protection goals and water management strategies; impact of foreign currency exchange rates; expected foundry capacities; the ability to obtain new business opportunities; and information under the heading “Fourth Quarter 2024 Outlook and Guidance.”