Taipei, Taiwan, February 24, 2021 - United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC”), at a meeting of the Board of Directors held today, approved the 2020 Business Report and Financial Statements, and set the agenda for the Annual General Meeting. A brief summary of major recognition and discussion items is as follows:

• Approved the 2020 Business Report and Financial Statements. The consolidated revenue for 2020 was NT$176,821 million and net income attributable to the shareholders of the parent was NT$29,189 million, with earnings per share of NT$2.42.
• Shareholder cash dividend of approximately NT$1.60 per share.
• Employee cash compensation of NT$2,581.7 million.

Other major resolutions of today's Board Meeting:

• Approved the capital budget execution of NT$6,229 million towards capacity deployment.
• Approved the issuance of unsecured straight bonds, with a total amount of no more than US$15 billion.
• Approved the termination of the issuance plan for private placement ratified during the 2020 Annual General Meeting.
• Approved the proposal of a private placement plan in the 2021 Annual General Meeting to fulfill operational needs.
• Approved a donation of NT$10 million to UMC Science and Culture Foundation.
• Announced that the Annual General Meeting will be held at 9:00 AM on Tuesday, June 8, 2021 at No. 2, Prosperity 1st Rd., Hsinchu Science Park.

UMC (NYSE: UMC, TWSE: 2303) is a leading global semiconductor foundry. The company provides high quality IC production with a focus on both logic and specialty technologies to serve every major sector of the electronics industry. UMC’s comprehensive technology and manufacturing solutions include logic/RF, embedded high voltage, embedded flash, RFSOI/BCD on 8" & 12" wafers and IATF-16949 automotive manufacturing certification for all its manufacturing facilities. UMC operates 12 fabs that are strategically located throughout Asia with a maximum capacity of more than 750,000 8-inch equivalent wafers per month. The company employs approximately 19,500 people worldwide, with offices in Taiwan, China, United States, Europe, Japan, Korea and Singapore. For more information, please visit: https://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.