$BIIB
Biogen Inc. Common Stock
XNAS•Health Care•Biological Products, (No Diagnostic Substances)
Why is BIIB up today? It is at $216.04 (+0.00%), and our scanner flagged it 13 times on unusual volume this month. See the catalyst behind the move, real-time alerts the moment BIIB spikes, and full due diligence on BIIB — key stats, earnings, dilution and insider activity. Free.
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Key Stats
- Price
- $216.04
- Change today
- +0.00%
- Previous close
- $216.04
- 52-week range
- $135.39 – $222.85
- Market cap
- $31.99B
- Shares outstanding
- 147.6M
- Institutional own.
- 99.9%
- Total held
- 100.0%
- Short interest
- 5.2M ▼ -5% vs prior · as of 2026-08-14
- Days to cover
- 6.1d
- Avg daily volume
- 1.5M
- Sector
- Health Care
- Industry
- Biological Products, (No Diagnostic Substances)
- Exchange
- XNAS
- 5mthin
- 820x
- 15mthin
- 820x
- 1hthin
- 0.8x
- 1D
- --
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Why is $BIIB moving today?
Here is the latest on BIIB from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for BIIB today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
Insiders
Insiders buying9 buys, 2 sells last 3 months (10/21 over 12 months)Show 12 recent transactionsMinimize 12 recent transactions
| Insider | Action | Shares | % of position | Owns after | Value | Date |
|---|---|---|---|---|---|---|
Minor Lloyd Director | Sold (automatic/other) | -593 | sold 18% | 3K | $119K at $200.96 | Aug 4, 26 |
Minor Lloyd Director | Sold (automatic/other) | -593 | sold 15% | 3K | $121K at $203.34 | Aug 3, 26 |
Freire Maria C Director | Acquired (grant/award) | +2K | added 29% | 9K | n/a | Jun 9, 26 |
Minor Lloyd Director | Acquired (grant/award) | +2K | added 64% | 4K | n/a | Jun 9, 26 |
Pangalos Menelas N Director | Acquired (grant/award) | +2K | added 64% | 4K | n/a | Jun 9, 26 |
Pangalos Menelas N Director | Other | 2K | n/a | 2K | n/a | Jun 9, 26 |
Patolawala Monish D Director | Acquired (grant/award) | +2K | added 41% | 5K | n/a | Jun 9, 26 |
Langer Susan Director | Acquired (grant/award) | +2K | added 29% | 7K | n/a | Jun 9, 26 |
Mantas Jesus B Director | Acquired (grant/award) | +2K | added 15% | 11K | n/a | Jun 9, 26 |
Rowinsky Eric K Director | Acquired (grant/award) | +2K | added 6.2% | 26K | n/a | Jun 9, 26 |
Sherwin Stephen A Director | Acquired (grant/award) | +2K | added 11% | 15K | n/a | Jun 9, 26 |
Hawkins William A Director | Acquired (grant/award) | +2K | added 17% | 10K | n/a | Jun 9, 26 |
Recent Form-4 filings via Nasdaq. Open-market buys are the signal worth watching. Grants and automatic (10b5-1) sells are routine. “% of position” is the share of that insider’s own holding the trade moved. Not investment advice.
Dilution watch
UnavailableWe could not reach SEC EDGAR, so the dilution check did not run for $BIIB. This is not a clean result: there may be an offering, a registration or a shelf on file that we were unable to read. Check it yourself on SEC EDGAR before trading it.
$BIIB Sentiment
NeutralBlend of news sentiment, today’s move, and community votes. Not investment advice.
$BIIB Activity
News, unusual-volume alerts, AI-trader trades and community chatter - the whole story, newest first.
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BIIB stock FAQ
Why is $BIIB moving today?
Here is the latest on BIIB from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for BIIB today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
What is the BIIB stock price today?
BIIB last traded at $216.04, up 0.00% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
Where can I see live BIIB alerts?
The BIIB Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged BIIB 13 times in the last 30 days.
What exchange is BIIB on?
BIIB (Biogen Inc. Common Stock) trades on XNAS, with a market cap of about $31.99B in the BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES) sector.
Is BIIB good for day trading?
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge BIIB for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.