SIX · BSLN · stock
Basilea Pharmaceutica AG (BSLN) stock price history
Every SIX trading session of Basilea Pharmaceutica AG from Mar 25, 2004 to Sep 28, 2026: 5,683 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.
BSLN adjusted close, 2004 to 2026
- CHF 258.39
- All time high, 2007
- CHF 70.50
- 52 week high, CHF 44.70 low
- 5,683
- Daily sessions since 2004
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 2004 to 2026 series and minute bars.
BSLN key facts
- Basilea Pharmaceutica AG (BSLN) closed at CHF 68.50 on Sep 28, 2026 on SIX.
- BSLN's all time high close is CHF 258.39, set on Mar 30, 2007; its all time low close is CHF 26.46 on Nov 23, 2011.
- BSLN's 52 week range is CHF 44.70 to CHF 70.50.
- BSLN returned +51.5% over the year to Sep 28, 2026 and +55.3% over five years.
- Over ten years BSLN returned -11%, -1.2% a year compounded.
- BSLN's deepest drawdown was -89.8% from Mar 30, 2007 to Nov 23, 2011.
- DataCedar holds 5,683 daily sessions of BSLN history from Mar 25, 2004 and minute bars from Sep 17, 2026, adjusted for splits and dividends, served by the API under a key.
BSLN price chart, 2004 to 2026
BSLN returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | +6.2% |
| 3 months | +32.0% |
| 6 months | +30.2% |
| Year to date | +25.2% |
| 1 year | +51.5% |
| 3 years | +66.9% |
| 5 years | +55.3% |
| 10 years | -11.0% |
| Since Mar 25, 2004 | -25.4% |
| Compound annual growth, 22.5 years | -1.3% |
BSLN records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- CHF 258.39 on Mar 30, 2007
- All time low close
- CHF 26.46 on Nov 23, 2011
- 52 week high
- CHF 70.50 on Sep 21, 2026
- 52 week low
- CHF 44.70 on Nov 6, 2025
- Deepest drawdown
- -89.8% from Mar 30, 2007 to Nov 23, 2011, not yet recovered
- Best single session
- +18.4% on Sep 20, 2011
- Worst single session
- -36.8% on Feb 24, 2009
- Volatility, 1 year annualised
- 27.5%
- Sessions closing higher, 1 year
- 49%
- Best calendar year
- 2013, +158%
- Worst calendar year
- 2009, -57%
BSLN 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. 2004 starts on Mar 25, 2004; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | CHF 54.70 | CHF 70.50 | CHF 47.80 | CHF 68.50 | +25.2% | 6.8M | 186 |
| 2025 | CHF 41.45 | CHF 59.70 | CHF 37.50 | CHF 54.70 | +32.3% | 10M | 249 |
| 2024 | CHF 35.45 | CHF 47.95 | CHF 32.00 | CHF 41.35 | +17.1% | 7.6M | 250 |
| 2023 | CHF 45.90 | CHF 55.40 | CHF 33.55 | CHF 35.30 | -22.9% | 7.9M | 251 |
| 2022 | CHF 41.68 | CHF 50.10 | CHF 29.55 | CHF 45.80 | +11.9% | 11.1M | 254 |
| 2021 | CHF 53.40 | CHF 61.95 | CHF 36.60 | CHF 40.92 | -23.0% | 16M | 254 |
| 2020 | CHF 47.38 | CHF 61.20 | CHF 29.28 | CHF 53.15 | +13.4% | 21.3M | 252 |
| 2019 | CHF 40.02 | CHF 55.90 | CHF 33.46 | CHF 46.86 | +17.3% | 15M | 249 |
| 2018 | CHF 77.45 | CHF 81.45 | CHF 38.60 | CHF 39.96 | -47.4% | 15.8M | 249 |
| 2017 | CHF 73.35 | CHF 95.35 | CHF 70.10 | CHF 75.90 | +3.8% | 16.3M | 251 |
| 2016 | CHF 96.40 | CHF 97.55 | CHF 58.80 | CHF 73.10 | -24.1% | 15.3M | 254 |
| 2015 | CHF 92.10 | CHF 139.30 | CHF 89.00 | CHF 96.30 | +4.5% | 19.2M | 251 |
| 2014 | CHF 104.50 | CHF 129.80 | CHF 79.75 | CHF 92.15 | -12.6% | 20.8M | 249 |
| 2013 | CHF 41.20 | CHF 108.50 | CHF 40.37 | CHF 105.40 | +158.1% | 13.2M | 249 |
| 2012 | CHF 33.41 | CHF 48.75 | CHF 32.13 | CHF 40.83 | +24.9% | 5.8M | 250 |
| 2011 | CHF 59.51 | CHF 71.59 | CHF 26.14 | CHF 32.68 | -45.1% | 8.7M | 254 |
| 2010 | CHF 59.51 | CHF 78.91 | CHF 48.06 | CHF 59.51 | +0.9% | 8.9M | 254 |
| 2009 | CHF 133.66 | CHF 135.03 | CHF 42.43 | CHF 59.00 | -56.7% | 10.6M | 253 |
| 2008 | CHF 201.86 | CHF 201.86 | CHF 79.65 | CHF 136.31 | -32.5% | 10.1M | 253 |
| 2007 | CHF 193.20 | CHF 260.68 | CHF 163.05 | CHF 201.86 | +4.2% | 8.9M | 251 |
| 2006 | CHF 126.38 | CHF 197.84 | CHF 123.65 | CHF 193.66 | +53.2% | 4.5M | 258 |
| 2005 | CHF 83.87 | CHF 130.38 | CHF 70.01 | CHF 126.38 | +53.6% | 2.7M | 260 |
| 2004 | CHF 102.74 | CHF 102.74 | CHF 52.73 | CHF 82.28 | n/a | 3.1M | 202 |
BSLN monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | CHF 68.50 | +7.9% |
| August 2026 | CHF 63.50 | +22.4% |
| July 2026 | CHF 51.90 | -2.8% |
| June 2026 | CHF 53.40 | +2.5% |
| May 2026 | CHF 52.10 | -4.2% |
| April 2026 | CHF 54.40 | 0.0% |
| March 2026 | CHF 54.40 | -1.4% |
| February 2026 | CHF 55.20 | +2.2% |
| January 2026 | CHF 54.00 | -1.3% |
| December 2025 | CHF 54.70 | +11.5% |
| November 2025 | CHF 49.05 | +5.5% |
| October 2025 | CHF 46.50 | -1.7% |
About the BSLN data
Daily bars. 5,683 sessions from Mar 25, 2004 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 Mar 25, 2004, 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/BSLN/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on SIX
Common questions
BSLN share price history
