• Biogen EPS for the quarter ending September 30, 2024 was $2.66, a 665.96% decline year-over-year.
• Biogen 2023 annual EPS was $7.97, a 61.81% decline from 2022.
• Biogen 2022 annual EPS was $20.87, a 100.67% increase from 2021.
• Biogen 2021 annual EPS was $10.4, a 58.06% decline from 2020.

Earnings per share can be defined as a company's net earnings or losses attributable to common shareholders per diluted share base, which includes all convertible securities and debt, options and warrants.