• Amgen average operating margin for 2023 was 32.76%, a 5.65% decline from 2022.
• Amgen average operating margin for 2022 was 34.72%, a 13.43% decline from 2021.
• Amgen average operating margin for 2021 was 30.61%, a 18.61% 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.