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BIIB historical data download
Biogen Inc. Common Stock · Nasdaq · listed 1991-09-17 · Common stock · 1-minute to daily · split & dividend adjusted · CSV
Download options
Full history (2003-11-13 to today), 23 ticker-years. "Select" opens the download page with these settings, where you can still change the date range, adjustment and time zone.
| Bar size | Rows | Size (zip) | Full history | |
|---|---|---|---|---|
| 1 min | ~3.6M | ~70 MB | $23 | Select |
| 5 min | ~645K | ~13 MB | $12 | Select |
| 15 min | ~215K | ~4 MB | $12 | Select |
| 1 hour | ~57K | ~1 MB | $8 | Select |
| DailyFree | 5,783 | 97 KB | Free | Download free |
Data preview
Real rows from the most recent trading day, adjusted, in US Eastern time: exactly what the download contains.
| datetime_et | open | high | low | close | volume | vwap | trades | |
|---|---|---|---|---|---|---|---|---|
| 2026-11-13 09:27:00 | Pre | 250 | 250 | 250 | 250 | 109 | 250 | 3 |
| 2026-11-13 09:30:00 | Regular | 250.58 | 250.655 | 250.58 | 250.655 | 5,333 | 250.5747 | 65 |
| 2026-11-13 09:32:00 | Regular | 251.4 | 251.95 | 251.4 | 251.45 | 1,504 | 251.5432 | 47 |
| 2026-11-13 09:33:00 | Regular | 251.455 | 253 | 251.455 | 253 | 916 | 251.6361 | 25 |
| ⋯ | ||||||||
| 2026-11-13 15:59:00 | Regular | 253.47 | 253.615 | 253.36 | 253.6 | 41,052 | 253.4762 | 1058 |
| 2026-11-13 16:00:00 | After | 253.4 | 253.4 | 253.4 | 253.4 | 11,465 | 253.396 | 56 |
| 2026-11-13 16:15:00 | After | 253.4 | 253.4 | 253.4 | 253.4 | 1,604 | 253.4 | 6 |
Splits, dividends and ticker changes
The adjusted data already accounts for every event below, so there is nothing left for you to fix.
Splits 0
No splits or reverse splits in the data period (2003-11-13 to today).
Dividends 0
No cash dividends in the data period, so the adjustment covers splits only.
Ticker changes 0
Traded as BIIB throughout the data period, so there is nothing to stitch.
Year by year
Computed from adjusted daily bars. The table also lists estimated 1-minute rows per year, to help size a download.
BIIB data FAQ
Why does the data start on 2003-11-13 and not the listing date?
BIIB listed on 1991-09-17, but our minute-level history begins on 2003-11-13. Earlier data isn't available.
Do you have overnight (20:00–4:00 ET) data?
Not yet. The data comes from the consolidated tape (SIP), which covers 4:00–20:00 ET. US exchanges plan to add overnight trading to the SIP from 2026-12-06, and we will follow.
Can I keep the download up to date with the API?
Yes. Downloads and the market data API share the same data and the same adjustment. Download the history once, then pull each new day from the /v2/aggs endpoint.