Biogen (BIIB) Shares Outstanding (2009 - 2026)

Biogen has reported Shares Outstanding (Entity) for 18 years, with the latest figure at $147.8 million in Q2 2026.

• On a quarterly basis, Shares Outstanding (Entity) rose 0.78% year-over-year to $147.8 million in Q2 2026; TTM through Jun 2026 was $147.8 million, a 0.78% increase from a year earlier, with the FY2025 full-year figure at $146.8 million, up 0.69% from the prior year.
• Shares Outstanding (Entity) was $147.8 million for Q2 2026 at Biogen, roughly flat from $147.6 million in the prior quarter.
• The five-year high for Shares Outstanding (Entity) was $147.8 million in Q2 2026, with the low at $144.0 million in Q4 2022.
• Average Shares Outstanding (Entity) over 5 years is $145.8 million, with a median of $145.7 million recorded in 2024.
• The sharpest annual moves came in 2022 and 2026: Shares Outstanding (Entity) slipped 2.73% in 2022, then advanced 0.78% in 2026.
• Over 5 years, Shares Outstanding (Entity) stood at $144.0 million in 2022, then gained by 0.62% to $144.9 million in 2023, then rose by 0.62% to $145.8 million in 2024, then rose by 0.69% to $146.8 million in 2025, then advanced by 0.65% to $147.8 million in 2026.
• The last three Shares Outstanding (Entity) figures came in at $147.8 million (Q2 2026), $147.6 million (Q1 2026), and $146.8 million (Q4 2025), per Business Quant data.