UMC's Collaboration with Suppliers to Build a Sustainable Supply Chain Contributes to 2.64 Million Tons of Carbon Reduction

United Microelectronics Corporation (NYSE:UMC, TWSE: 2303))("UMC"), a leading semiconductor foundry, today held its Low-Carbon Supply Chain Awards Ceremony, in which 16 suppliers were recognized for their performance in reducing greenhouse gas emissions. UMC launched its Supply Chain Greenhouse Gas Inventory Initiative in 2022 to provide suppliers with resources to measure and reduce their greenhouse gas emissions. Since then, global sites of UMC's suppliers have reduced a total of 2.64 million tons of emissions.

SC Chien, UMC's Co-President and Chief Sustainability Officer, said, "With global average temperatures rising year after year, corporations must step up efforts to curb greenhouse gas emissions to ensure the sustainability of our planet. In 2023, UMC achieved significant progress in cutting emissions from our operations and established more ambitious reduction targets, demonstrating our commitment to sustainable development and climate action. Furthermore, we are collaborating with our suppliers to target 20% reduction in supply chain emissions by 2030, contributing to the low-carbon transition of our industry."

TS Wu, Vice President of UMC, said, "At UMC, we believe sustainable development is a cornerstone of our business operations. While companies must first act to decarbonize their own operations, extensive collaboration across the supply chain is also necessary. Since 2022, UMC has been assisting suppliers with conducting their greenhouse gas emissions inventory, and more than 300 have completed their inventory to date. We take this opportunity to applaud our suppliers for their participation and we look forward to advancing our shared environmental sustainability goals together."

UMC invited suppliers to join its Triple R League program in 2017, which promoted reducing consumption and the reuse and recycling of resources in the supply chain. In 2022, UMC launched the Supply Chain Greenhouse Gas Inventory Initiative to provide resources to suppliers and share the company's own experience from its net zero journey so far.

2024 Low-Carbon Supply Chain Awards winners:

Carbon Reduction Leadership Award

• KLA Corporation
• Tokyo Electron Taiwan Ltd.
• Merck Performance Materials Ltd.
• GlobalWafers Co., Ltd.
• Air Products San Fu Co., Ltd.

Excellent Carbon Reduction Award

• Allis Electric Co., Ltd.
• Leading Water Industries Co., Ltd
• DuPont
• AGC Electronics Taiwan Inc.

Distinguished Carbon Reduction Award

• Soitec Microelectronics Singapore Pte. Ltd
• Solar Applied Materials Technology Corp.
• Nalco Taiwan Company Ltd.
• Kanto Denka Kogyo Co., Ltd.

Carbon Reduction Recognition Award

• Worldwide Technology Co., Ltd.
• Concord Technology
• San Fu Chemical Co., Ltd.

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 located in Taiwan, with additional ones throughout Asia. UMC has a total of 12 fabs in production with combined capacity of more than 400,000 wafers per month (12-in equivalent), and all of them are certified with IATF 16949 automotive quality standard. UMC is headquartered in Hsinchu, Taiwan, plus local offices in United States, Europe, China, Japan, Korea & Singapore, with a worldwide total of 20,000 employees. For more information, please visit: http://www.umc.com.

Note from UMC Concerning Forward-Looking Statements

Some of the statements in the foregoing announcement are forward-looking within the meaning of the U.S. Federal Securities laws, including statements about introduction of new services and technologies, future outsourcing, competition, wafer capacity, business relationships and market conditions. Investors are cautioned that actual events and results could differ materially from these statements as a result of a variety of factors, including conditions in the overall semiconductor market and economy; acceptance and demand for products from UMC; and technological and development risks. Further information regarding these and other risks is included in UMC's filings with the U.S. Securities and Exchange Commission. UMC does not undertake any obligation to update any forward-looking statement as a result of new information, future events or otherwise, except as required under applicable law.

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