• Main Street Capital average operating margin for 2023 was 67.21%, a 4.31% decline from 2022.
• Main Street Capital average operating margin for 2022 was 64.43%, a 2.2% increase from 2021.
• Main Street Capital average operating margin for 2021 was 63.04%, a 1.51% 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.