Biogen Inc. (BIIB) Stock Price & How to Invest
Short answer
You can invest in Biogen Inc. (BIIB) by buying shares (or fractional shares) at any major broker, through an ETF that holds it, or as one holding in a thematic basket.
BIIB stock price
As of 2026-06-26, Biogen Inc. (BIIB) last closed at $216.03, up 71.3% over the past year. Over the past 52 weeks it has traded between $122.68 and $216.03.
Prices are daily closing prices from Yahoo Finance and may be delayed. For the live quote, check your broker or Biogen Inc.'s investor relations page. Walnut is informational, not investment advice.
About Biogen Inc. (BIIB)
We haven't generated a full guide for BIIB yet. The chart above shows 1-year performance against SPY. For hand-curated coverage of the most-discussed names, see the stock guides index.
How to invest in Biogen Inc. (BIIB)
There are three common ways to get BIIB exposure. Buy shares (or fractional shares) directly at any major broker. Hold an ETF that includes it, which spreads the position across many companies. Or build it into a focused thematic basket, so BIIB sits alongside other stocks that express the same thesis.
Walnut takes the basket route. Describe a thesis where BIIB fits (for example “AI infrastructure” or “dividend-growth large-caps”) and the AI proposes 5 to 6 constituents with target weights. You review the plan and fund it through your own broker when you're ready.
The bottom line on Biogen Inc. (BIIB)
Most investors get BIIB exposure through a broad ETF, or hold it with intent inside a focused thematic basket alongside names like VRTX and REGN. It fits themes like Biotech.
Build a basket around BIIB with Walnut
Use Biogen Inc. as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.
FAQ
What is Biogen Inc. (BIIB)'s ticker symbol?
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BIIB. The full company name is Biogen Inc.. It trades during US market hours and is available at every major US brokerage.
How do I invest in BIIB through Walnut?
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Walnut isn't a broker. It sits on top of your existing broker (Public, Alpaca, Schwab, Tradier, Webull for trading; Fidelity, Robinhood, and others for tracking). Connect a broker, then build a thematic basket that includes BIIB as one constituent. Walnut's AI proposes the rest of the basket from a thesis you describe.
Is BIIB a good stock to buy?
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Walnut is informational, not investment advice. Whether BIIB fits your portfolio depends on your time horizon, what else you own, and your risk tolerance.
Walnut is informational, not investment advice. Financial figures on this page are approximations; always verify current numbers with Biogen Inc.'s investor relations page or your broker before making investment decisions.