Biogen - 34 Year Stock Price History | BIIB

The latest closing stock price for Biogen as of March 25, 2025 is 139.16.

  • An investor who bought $1,000 worth of Biogen stock at the IPO in 1991 would have $47,313 today, roughly 47 times their original investment - a 12.08% compound annual growth rate over 34 years.
  • The all-time high Biogen stock closing price was 438.73 on March 20, 2015.
  • The Biogen 52-week high stock price is 238.00, which is 71% above the current share price.
  • The Biogen 52-week low stock price is 128.51, which is 7.7% below the current share price.
  • The average Biogen stock price for the last 52 weeks is 186.05.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.

Biogen - 34 Year Stock Price History | BIIB

  • An investor who bought $1,000 worth of Biogen stock at the IPO in 1991 would have $47,313 today, roughly 47 times their original investment - a 12.08% compound annual growth rate over 34 years.
  • The all-time high Biogen stock closing price was 438.73 on March 20, 2015.
  • The Biogen 52-week high stock price is 238.00, which is 71% above the current share price.
  • The Biogen 52-week low stock price is 128.51, which is 7.7% below the current share price.
  • The average Biogen stock price for the last 52 weeks is 186.05.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.