• SEI Investments average operating margin for 2023 was 21.69%, a 14% increase from 2022.
• SEI Investments average operating margin for 2022 was 25.22%, a 11.97% decline from 2021.
• SEI Investments average operating margin for 2021 was 28.65%, a 8.52% decline 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.