• Ameren average operating margin for 2024 was 21.43%, a 9.28% decline from 2023.
• Ameren average operating margin for 2023 was 19.61%, a 0.41% increase from 2022.
• Ameren average operating margin for 2022 was 19.53%, a 10.94% increase from 2021.

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.