• United Microelectronics average operating margin for 2023 was 30.94%, a 8.73% decline from 2022.
• United Microelectronics average operating margin for 2022 was 33.9%, a 81.28% decline from 2021.
• United Microelectronics average operating margin for 2021 was 18.7%, a 99.36% increase from 2020.

Operating margin can be defined as operating margin measurement of what proportion of a company's revenue is left over after paying for variable costs of production such as wages, raw materials, etc.