• Ameren average pre-tax profit margin for 2023 was 16.56%, a 0.6% increase from 2022.
• Ameren average pre-tax profit margin for 2022 was 16.66%, a 9.01% decline from 2021.
• Ameren average pre-tax profit margin for 2021 was 18.31%, a 4.75% decline from 2020.

Pre-tax profit margin can be defined as earnings before taxes as a portion of total revenue.