• Mueller Industries average operating margin for 2023 was 22.53%, a 6.78% decline from 2022.
• Mueller Industries average operating margin for 2022 was 21.1%, a 50.28% increase from 2021.
• Mueller Industries average operating margin for 2021 was 14.04%, a 50.48% 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.