What is the all time high of BION?

BB Biotech AG (BION) closed at its highest ever adjusted price, CHF 70.66, on Aug 9, 2021. Its lowest close was CHF 3.65 on Feb 10, 2003.

How much has BION returned over the last 10 years?

+68.3% in price terms from the close ten years before Sep 28, 2026, which is +5.3% a year compounded. Over one year the return is +52.2%; over five years -21.4%.

What was the worst drawdown in BION history?

-80.4% from the Mar 6, 2000 peak to the Feb 10, 2003 trough on adjusted closes; the previous peak was regained on Feb 25, 2014.

How far back does BION historical data go?

The daily series starts on Jan 4, 2000 and runs to Sep 28, 2026: 6,785 trading sessions across 26.7 years. Minute bars start on Sep 17, 2026 and are captured forward, never backfilled.

Are BION historical prices adjusted for splits and dividends?

Yes. The page uses the fully adjusted series, in which every past price is scaled for later splits and cash dividends so returns are comparable across the whole history. The API also serves raw prices, split adjusted only and dividend adjusted only.

How do I get BION historical data?

Register for a free key and call the bars endpoint: it returns date, open, high, low, close and volume as JSON, one year back on the free plan and the full series from Jan 4, 2000 on Quant and above. Minute history comes with the paid plans.

What were the best and worst years for BION?

Among complete calendar years, 2014 was the best at +75.1% and 2002 the worst at -54.8%, measured close to close.

SIX · BION · stock

BB Biotech AG (BION) stock price history

Every SIX trading session of BB Biotech AG from Jan 4, 2000 to Sep 28, 2026: 6,785 daily bars, adjusted for splits and dividends, with minute bars from Sep 17, 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.

Get BION data, free key Year by year table

BION adjusted close, 2000 to 2026

BIONBB Biotech AG

CHF 51.20+52.2% over one year

CHF 70.66
All time high, 2021: CHF 57.00
52 week high, CHF 33.88 low: 6,785
Daily sessions since 2000

Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 2000 to 2026 series and minute bars.

BION key facts

BB Biotech AG (BION) closed at CHF 51.20 on Sep 28, 2026 on SIX.
BION's all time high close is CHF 70.66, set on Aug 9, 2021; its all time low close is CHF 3.65 on Feb 10, 2003.
BION's 52 week range is CHF 33.88 to CHF 57.00.
BION returned +52.2% over the year to Sep 28, 2026 and -21.4% over five years.
Over ten years BION returned +68%, +5.3% a year compounded.
BION's deepest drawdown was -80.4% from Mar 6, 2000 to Feb 10, 2003.
DataCedar holds 6,785 daily sessions of BION history from Jan 4, 2000 and minute bars from Sep 17, 2026, adjusted for splits and dividends, served by the API under a key.

BION price chart, 2000 to 2026

Adjusted daily close, log scale. 260 sampled points across the full history; the API serves every session.

BION returns

Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.

Period	Return
1 month	-8.6%
3 months	+7.6%
6 months	+19.5%
Year to date	+19.8%
1 year	+52.2%
3 years	+43.7%
5 years	-21.4%
10 years	+68.3%
Since Jan 4, 2000	+523.0%
Compound annual growth, 26.7 years	+7.1%

BION records

Measured on the stored closes; every figure is reproducible from the API series.

All time high close: CHF 70.66 on Aug 9, 2021
All time low close: CHF 3.65 on Feb 10, 2003
52 week high: CHF 57.00 on Aug 25, 2026
52 week low: CHF 33.88 on Sep 29, 2025
Deepest drawdown: -80.4% from Mar 6, 2000 to Feb 10, 2003, recovered Feb 25, 2014
Best single session: +12.6% on Nov 9, 2016
Worst single session: -13.0% on Mar 22, 2001
Volatility, 1 year annualised: 24.4%
Sessions closing higher, 1 year: 50%
Growth of 1 since 2000: 6.2×
Best calendar year: 2014, +75%
Worst calendar year: 2002, -55%

BION 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. 2000 starts on Jan 4, 2000; 2026 runs to Sep 28, 2026.

Year	Open	High	Low	Close	Return	Volume	Sessions
2026	CHF 42.77	CHF 57.00	CHF 40.68	CHF 51.20	+19.8%	16.8M	186
2025	CHF 31.85	CHF 44.77	CHF 23.14	CHF 42.72	+33.9%	22.5M	249
2024	CHF 37.27	CHF 42.97	CHF 31.09	CHF 31.90	-13.5%	17.5M	250
2023	CHF 45.98	CHF 49.57	CHF 30.50	CHF 36.88	-18.0%	13.6M	251
2022	CHF 59.72	CHF 60.72	CHF 41.58	CHF 45.01	-24.3%	17.4M	254
2021	CHF 54.75	CHF 71.20	CHF 53.64	CHF 59.45	+8.4%	17.8M	254
2020	CHF 46.33	CHF 55.49	CHF 29.00	CHF 54.86	+19.3%	26M	252
2019	CHF 39.46	CHF 50.53	CHF 38.87	CHF 45.99	+18.5%	22.3M	249
2018	CHF 41.49	CHF 49.56	CHF 36.57	CHF 38.80	-5.1%	27.9M	249
2017	CHF 34.11	CHF 43.23	CHF 31.36	CHF 40.89	+23.1%	30M	251
2016	CHF 32.81	CHF 33.84	CHF 22.07	CHF 33.20	+0.3%	38.8M	254
2015	CHF 25.97	CHF 39.16	CHF 25.13	CHF 33.09	+28.2%	52.4M	251
2014	CHF 14.78	CHF 27.07	CHF 14.44	CHF 25.82	+75.1%	41.3M	249
2013	CHF 8.95	CHF 15.42	CHF 8.91	CHF 14.74	+66.0%	26.3M	249
2012	CHF 6.22	CHF 9.81	CHF 6.10	CHF 8.88	+42.7%	34M	250
2011	CHF 5.90	CHF 6.78	CHF 4.18	CHF 6.22	+5.6%	29.5M	254
2010	CHF 6.88	CHF 7.06	CHF 5.06	CHF 5.89	-15.1%	34.3M	254
2009	CHF 6.05	CHF 7.09	CHF 4.85	CHF 6.94	+14.9%	25.8M	253
2008	CHF 7.37	CHF 8.30	CHF 5.21	CHF 6.04	-18.7%	46.4M	253
2007	CHF 8.03	CHF 9.38	CHF 7.23	CHF 7.43	-6.8%	74.2M	251
2006	CHF 6.70	CHF 7.98	CHF 5.88	CHF 7.98	+19.1%	53.8M	258
2005	CHF 5.60	CHF 6.86	CHF 5.16	CHF 6.70	+19.5%	44.6M	260
2004	CHF 4.89	CHF 6.31	CHF 4.65	CHF 5.61	+14.6%	48.4M	262
2003	CHF 4.41	CHF 5.81	CHF 3.56	CHF 4.89	+10.8%	47.7M	261
2002	CHF 9.77	CHF 9.77	CHF 3.73	CHF 4.41	-54.8%	35.3M	261
2001	CHF 13.67	CHF 13.67	CHF 6.21	CHF 9.77	-28.6%	46.1M	261
2000	CHF 8.73	CHF 19.26	CHF 7.67	CHF 13.67	n/a	98.6M	259

BION monthly closes, last 12 months

Month	Month end close	Change
September 2026	CHF 51.20	-8.4%
August 2026	CHF 55.90	+9.4%
July 2026	CHF 51.10	+4.8%
June 2026	CHF 48.75	+11.7%
May 2026	CHF 43.65	-1.1%
April 2026	CHF 44.15	-0.7%
March 2026	CHF 44.45	-0.7%
February 2026	CHF 44.77	+1.6%
January 2026	CHF 44.05	+3.1%
December 2025	CHF 42.72	-0.2%
November 2025	CHF 42.82	+9.6%
October 2025	CHF 39.06	+13.4%

About the BION data

Daily bars. 6,785 sessions from Jan 4, 2000 to Sep 28, 2026, one row per SIX 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 17, 2026 forward, most recent session Sep 28, 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 SIX trading days; minute timestamps are UTC. Prices are in CHF. 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 Jan 4, 2000, 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/BION/bars?timeframe=1Day&adjustment=all&limit=50000" \
  -H "X-API-Key: YOUR_KEY"

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