BIIB (Biogen Inc.) historical data
STOCKListed1-minute bars
| Symbol | BIIB |
|---|---|
| Name | Biogen Inc. |
| Exchange | NASDAQ |
| Sector | Healthcare |
| Industry | Drug Manufacturers - General |
| IPO date | 1991-09-17 |
| History | 2001-01-18 to 2026-10-09 (about 25 years) |
| Bar sizes | Daily, hourly, 5-minute and 1-minute |
| Adjustments | Unadjusted, split-adjusted or split-and-dividend-adjusted, chosen on read |
| Survivorship | Included in the survivorship-free universe |
| Free tier | Last 12 months of daily bars |
Price history at a glance
BIIB last closed at $225.71 on 2026-10-09, +50.9% over the past year and -21.0% over five years. Its deepest fall from a prior high in this history was -76.2%, reached on 2025-04-10.
| Last close | $225.71 (2026-10-09) |
|---|---|
| 1-year change | +50.9% |
| 5-year change | -21.0% |
| Annualized since 2001-01-18 | +5.5% |
| 52-week range | $142.26 – $228.69 |
| Deepest drawdown | -76.2% (2025-04-10) |
| Avg. daily dollar volume (3 months) | $224.9m |
| Daily bars in history | 6,467 |
Split- and dividend-adjusted closes. Computed by FinzData from its own daily bars.
Institutional ownership (13F, 2026Q2)
| Managers holding | 1,041 |
|---|---|
| Shares held | 142,254,095 ($30.7bn reported value) |
| Quarter flows | 126 new, 426 added, 293 trimmed, 97 exited; +7,283,317 shares vs the prior quarter |
From SEC Form 13F filings. Every holder, line by line, and the full history since 2013: yf.Client().holders("BIIB") on the look-back bundles. Top holders of BIIB · All 13F managers
Short interest (2026-09-30)
| Shares short | 5,965,892 (+2.5% vs prior report) |
|---|---|
| Days to cover | 4.87 |
BIIB short interest history · Healthcare sector
Get it in Python
import finzdata as yf
df = yf.Ticker("BIIB").history(start="2001-01-18", interval="1d")
df.tail()