Biogen Inc. (BIIB) Stock Chart
BIIB price chart
Daily prices adjusted for splits and dividends. 1D and 5D show delayed intraday prices. Markers: E earnings, D dividend, S split.
Technical snapshot
Key levels & statistics
BIIB performance vs the market
Total return, dividends reinvestedBIIB monthly returns
BIIB historical prices
BIIB dividends & splits
About the BIIB chart
Biogen (BIIB) closed at $232.65 on October 16, 2026, up 32.2% so far this year. The stock is trading 17.6% above its 200-day moving average of $197.83, which technical analysts usually read as a long-term uptrend. Over the past year BIIB returned +63.5% including dividends, ahead of the S&P 500 (+16.8%).
This page charts the full trading history of Biogen Inc. stock. Daily prices come from EODHD and are adjusted for stock splits and dividends, so returns over long periods are comparable. For the latest quote, company profile, earnings and news, see the BIIB stock overview.
BIIB chart FAQ
What is Biogen's all-time high stock price?
The highest closing price for BIIB was $475.98 on March 20, 2015 (adjusted for stock splits). As of the October 16, 2026 close it traded 51.1% below that level.
What is the 52-week range of BIIB stock?
Over the 52 weeks to October 16, 2026, BIIB traded between an intraday low of $138.00 on October 30, 2025 and an intraday high of $240.99 on October 15, 2026.
Is BIIB above its 200-day moving average?
Yes. On October 16, 2026 BIIB closed at $232.65, 17.6% above its 200-day simple moving average of $197.83. The 50-day average was $219.71.
How has BIIB stock performed compared with the S&P 500?
Including reinvested dividends, BIIB returned +63.5% over the past year, compared with +16.8% for the S&P 500 (SPY). Over five years the figures were −17.3% and +83.0%.
Does Biogen pay a dividend?
Biogen has not paid a dividend in the past 12 months.
Has BIIB stock ever split?
BIIB has split its stock 2 times: 2:1 (December 21, 1999), 3:1 (January 18, 2001). Prices on this chart are adjusted for all splits.
How do I read the BIIB chart?
Pick a time range above the chart and choose candlesticks, a line or an area chart. Moving averages, Bollinger Bands, volume, RSI and MACD can be switched on with the indicator buttons, and "Compare" plots BIIB against the S&P 500, its sector or a competitor as a percentage change. Chart prices are adjusted for splits and dividends.