• Biogen average operating margin for 2024 was 20.57%, a 18.5% increase from 2023.
• Biogen average operating margin for 2023 was 25.24%, a 13.09% decline from 2022.
• Biogen average operating margin for 2022 was 29.04%, a 11.48% decline 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.