B3 · BIIB34 · stock
Biogen Inc. (BIIB34) stock price history
Every B3 trading session of Biogen Inc. from Apr 28, 2016 to Sep 25, 2026: 2,597 daily bars, adjusted for splits and dividends, with minute bars from Sep 21, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
BIIB34 adjusted close, 2016 to 2026
- R$359.50
- All time high, 2020
- R$191.00
- 52 week high, R$121.32 low
- 2,597
- Daily sessions since 2016
Last updated Sep 25, 2026, the last stored session. Refreshes after each trading day. Full 2016 to 2026 series and minute bars.
BIIB34 key facts
- Biogen Inc. (BIIB34) closed at R$188.28 on Sep 25, 2026 on B3.
- BIIB34's all time high close is R$359.50, set on Nov 6, 2020; its all time low close is R$110.07 on Apr 10, 2025.
- BIIB34's 52 week range is R$121.32 to R$191.00.
- BIIB34 returned +49.9% over the year to Sep 25, 2026 and -27.6% over five years.
- Over ten years BIIB34 returned +12%, +1.2% a year compounded.
- BIIB34's deepest drawdown was -69.4% from Nov 6, 2020 to Apr 10, 2025.
- DataCedar holds 2,597 daily sessions of BIIB34 history from Apr 28, 2016 and minute bars from Sep 21, 2026, adjusted for splits and dividends, served by the API under a key.
BIIB34 price chart, 2016 to 2026
BIIB34 returns
Price return from the last close on or before the window start to Sep 25, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -0.0% |
| 3 months | +16.2% |
| 6 months | +15.8% |
| Year to date | +16.9% |
| 1 year | +49.9% |
| 3 years | -8.8% |
| 5 years | -27.6% |
| 10 years | +12.4% |
| Since Apr 28, 2016 | +14.7% |
| Compound annual growth, 10.4 years | +1.3% |
BIIB34 records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- R$359.50 on Nov 6, 2020
- All time low close
- R$110.07 on Apr 10, 2025
- 52 week high
- R$191.00 on Aug 20, 2026
- 52 week low
- R$121.32 on Sep 29, 2025
- Deepest drawdown
- -69.4% from Nov 6, 2020 to Apr 10, 2025, not yet recovered
- Best single session
- +41.7% on Jun 7, 2021
- Worst single session
- -40.5% on Nov 9, 2020
- Volatility, 1 year annualised
- 31.3%
- Sessions closing higher, 1 year
- 20%
- Best calendar year
- 2017, +12%
- Worst calendar year
- 2024, -25%
BIIB34 price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 2016 starts on Apr 28, 2016; 2026 runs to Sep 25, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | R$161.00 | R$191.00 | R$147.50 | R$188.28 | +16.9% | 3.7K | 184 |
| 2025 | R$157.78 | R$166.56 | R$110.07 | R$161.00 | +4.6% | 6.7K | 250 |
| 2024 | R$205.20 | R$214.94 | R$150.16 | R$153.90 | -25.0% | 12.8K | 251 |
| 2023 | R$239.99 | R$259.76 | R$183.00 | R$205.20 | -14.5% | 16.2K | 248 |
| 2022 | R$223.52 | R$277.00 | R$157.76 | R$240.00 | +8.8% | 67.2K | 250 |
| 2021 | R$213.16 | R$355.98 | R$209.40 | R$220.65 | +4.7% | 103K | 247 |
| 2020 | R$202.68 | R$360.00 | R$194.20 | R$210.70 | +4.0% | 98.5K | 248 |
| 2019 | R$194.90 | R$214.79 | R$142.23 | R$202.68 | +6.1% | 170.1K | 248 |
| 2018 | R$177.46 | R$245.36 | R$144.31 | R$191.05 | +7.7% | 136.6K | 246 |
| 2017 | R$157.96 | R$184.33 | R$133.58 | R$177.46 | +12.3% | 118.5K | 254 |
| 2016 | R$164.20 | R$185.87 | R$126.01 | R$157.96 | n/a | 202.4K | 171 |
BIIB34 monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | R$188.28 | -0.0% |
| August 2026 | R$188.29 | +9.5% |
| July 2026 | R$172.00 | +6.1% |
| June 2026 | R$162.08 | 0.0% |
| May 2026 | R$162.08 | +1.4% |
| April 2026 | R$159.80 | -1.7% |
| March 2026 | R$162.59 | -1.1% |
| February 2026 | R$164.32 | +5.7% |
| January 2026 | R$155.40 | -3.5% |
| December 2025 | R$161.00 | -0.9% |
| November 2025 | R$162.40 | +18.1% |
| October 2025 | R$137.54 | +12.9% |
About the BIIB34 data
Daily bars. 2,597 sessions from Apr 28, 2016 to Sep 25, 2026, one row per B3 trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Stored from Sep 21, 2026 forward, most recent session Sep 21, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are B3 trading days; minute timestamps are UTC. Prices are in BRL. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to Apr 28, 2016, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/BIIB34/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on B3
Common questions
BIIB34 share price history
