stockNASDAQ: BIIB • 28 Days Updates
Biogen Stock (BIIB)
Showing Closing Date Range from Sep 14 to Oct 12, 2026.
Biogen (BIIB) is a pioneering biotechnology company focused on discovering and developing treatments for neurological and neurodegenerative conditions, trading among Nasdaq Stocks. The stock last closed at $229.41, moving +2.60% over the past week and +5.54% across 28 days. Over longer horizons, shares moved +19.52% over 3 months, +27.07% over 6 months, and +58.55% over 12 months. Peer healthcare companies PFE (Pfizer) (+2.45%), MRNA (Moderna) (+45.71%), ZTS (Zoetis) (+2.69%), MRK (Merck) (+0.41%) and JNJ (Johnson & Johnson) (-0.97%) moved over the same 28-day period.
Investor Relations:biogen.com
Price & Performance Trajectory
Biogen Inc.NASDAQ: BIIB
Latest Close
$229.41
28 Days Updates Trajectory
Showing Closing Date Range from Sep 14 to Oct 12, 2026.Loading trajectory chart...
Click metric scorecards below to toggle price, return %, range & volume curvesBIIB session performance
✓ Latest Close USD
$229.41
Latest session close
+$12.05vs period start
Period Return % % GAIN
+5.54%
Net period trajectory
Cumulative ReturnNormalized
High / Low Range SPREAD
$238.24 / $213.54
Period range envelope
$24.70channel spread
Total Volume SHARES
23.39M
Period turnover
Avg: 1.17M/dLiquidity
Historical Session Ledger
Daily open, high, low, and close prices with volume and period returns.
Historical Quotes & Breakdown(20 dates)
| Date | Close (USD) | Return % | High | Low | Volume |
|---|---|---|---|---|---|
| Oct 12, 2026 | $229.41 | +1.64% | $238.24 | $229.00 | 1.46M |
| Oct 09, 2026 | $225.71 | +3.33% | $227.20 | $219.23 | 814.9K |
| Oct 08, 2026 | $218.43 | -1.67% | $223.09 | $215.73 | 1.34M |
| Oct 07, 2026 | $222.15 | -0.33% | $228.00 | $221.40 | 1.30M |
| Oct 06, 2026 | $222.89 | -0.31% | $225.97 | $218.00 | 1.01M |
| Oct 05, 2026 | $223.59 | +1.69% | $223.85 | $218.22 | 936.9K |
| Oct 02, 2026 | $219.88 | -1.32% | $224.08 | $219.84 | 773.2K |
| Oct 01, 2026 | $222.82 | -1.35% | $228.31 | $222.50 | 1.76M |
| Sep 30, 2026 | $225.88 | -0.52% | $229.36 | $225.51 | 1.55M |
| Sep 29, 2026 | $227.07 | -0.71% | $229.41 | $224.45 | 1.16M |
| Sep 28, 2026 | $228.69 | +0.48% | $230.49 | $225.51 | 1.33M |
| Sep 25, 2026 | $227.60 | +0.55% | $228.92 | $223.76 | 958.0K |
| Sep 23, 2026 | $227.53 | +0.96% | $229.19 | $222.36 | 1.49M |
| Sep 22, 2026 | $225.36 | +2.87% | $226.38 | $219.00 | 1.11M |
| Sep 21, 2026 | $219.07 | +1.66% | $221.92 | $214.59 | 928.5K |
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