• Biogen average debt/equity ratio for 2023 was 0.46, a 9.8% decline from 2022.
• Biogen average debt/equity ratio for 2022 was 0.51, a 17.74% decline from 2021.
• Biogen average debt/equity ratio for 2021 was 0.62, a 3.33% decline from 2020.

Debt/equity ratio can be defined as a measure of a company's financial leverage calculated by dividing its long-term debt by stockholders' equity.