Nasdaq Stockholm · CLS-B · stock
Clinical Laserthermia Systems AB (publ) (CLS-B) stock price history
Every Nasdaq Stockholm trading session of Clinical Laserthermia Systems AB (publ) from Apr 16, 2009 to Sep 28, 2026: 4,386 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.
CLS-B adjusted close, 2009 to 2026
- SEK 1,229
- All time high, 2013
- SEK 10.48
- 52 week high, SEK 1.75 low
- 4,386
- Daily sessions since 2009
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 2009 to 2026 series and minute bars.
CLS-B key facts
- Clinical Laserthermia Systems AB (publ) (CLS-B) closed at SEK 1.77 on Sep 28, 2026 on Nasdaq Stockholm.
- CLS-B's all time high close is SEK 1,229, set on Feb 1, 2013; its all time low close is SEK 1.77 on Sep 28, 2026.
- CLS-B's 52 week range is SEK 1.75 to SEK 10.48.
- CLS-B returned -80.7% over the year to Sep 28, 2026 and -99.2% over five years.
- Over ten years CLS-B returned -100%, -43.9% a year compounded.
- CLS-B's deepest drawdown was -99.9% from Feb 1, 2013 to Sep 28, 2026.
- DataCedar holds 4,386 daily sessions of CLS-B history from Apr 16, 2009 and minute bars from Sep 17, 2026, adjusted for splits and dividends, served by the API under a key.
CLS-B price chart, 2009 to 2026
CLS-B returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -5.5% |
| 3 months | -49.7% |
| 6 months | -61.5% |
| Year to date | -74.2% |
| 1 year | -80.7% |
| 3 years | -94.9% |
| 5 years | -99.2% |
| 10 years | -99.7% |
| Since Apr 16, 2009 | -99.4% |
| Compound annual growth, 17.5 years | -25.6% |
CLS-B records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- SEK 1,229 on Feb 1, 2013
- All time low close
- SEK 1.77 on Sep 28, 2026
- 52 week high
- SEK 10.48 on Oct 8, 2025
- 52 week low
- SEK 1.75 on Sep 25, 2026
- Deepest drawdown
- -99.9% from Feb 1, 2013 to Sep 28, 2026, not yet recovered
- Best single session
- +89.2% on Mar 1, 2023
- Worst single session
- -57.7% on May 31, 2024
- Volatility, 1 year annualised
- 103.0%
- Sessions closing higher, 1 year
- 40%
- Best calendar year
- 2010, +122%
- Worst calendar year
- 2024, -87%
CLS-B 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. 2009 starts on Apr 16, 2009; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | SEK 7.01 | SEK 8.90 | SEK 1.75 | SEK 1.77 | -74.2% | 17.4M | 186 |
| 2025 | SEK 3.68 | SEK 13.36 | SEK 2.43 | SEK 6.88 | +88.0% | 40.6M | 249 |
| 2024 | SEK 27.60 | SEK 37.60 | SEK 3.52 | SEK 3.66 | -86.7% | 16.4M | 251 |
| 2023 | SEK 53.22 | SEK 180.65 | SEK 17.22 | SEK 27.60 | -48.1% | 14.5M | 251 |
| 2022 | SEK 225.95 | SEK 246.97 | SEK 45.88 | SEK 53.22 | -75.3% | 925.8K | 253 |
| 2021 | SEK 232.79 | SEK 339.46 | SEK 152.39 | SEK 215.18 | -8.3% | 1.3M | 253 |
| 2020 | SEK 308.16 | SEK 502.15 | SEK 167.55 | SEK 234.57 | -22.7% | 571.3K | 252 |
| 2019 | SEK 352.18 | SEK 721.48 | SEK 298.37 | SEK 303.27 | -14.1% | 374.8K | 247 |
| 2018 | SEK 774.58 | SEK 956.13 | SEK 311.09 | SEK 353.16 | -54.4% | 285.9K | 252 |
| 2017 | SEK 492.27 | SEK 1,254 | SEK 382.45 | SEK 774.58 | +55.9% | 349K | 253 |
| 2016 | SEK 432.65 | SEK 690.58 | SEK 347.95 | SEK 496.94 | +11.9% | 224.6K | 253 |
| 2015 | SEK 398.31 | SEK 869.87 | SEK 309.03 | SEK 444.09 | +11.5% | 381.5K | 251 |
| 2014 | SEK 797.57 | SEK 941.76 | SEK 354.82 | SEK 398.31 | -50.1% | 166.1K | 249 |
| 2013 | SEK 614.58 | SEK 1,343 | SEK 380.95 | SEK 797.57 | +29.8% | 379K | 250 |
| 2012 | SEK 307.29 | SEK 711.39 | SEK 216.79 | SEK 614.58 | +98.6% | 169.3K | 250 |
| 2011 | SEK 347.28 | SEK 618.79 | SEK 250.46 | SEK 309.39 | -10.9% | 129.5K | 253 |
| 2010 | SEK 156.59 | SEK 463.04 | SEK 115.76 | SEK 347.28 | +121.8% | 163.9K | 253 |
| 2009 | SEK 277.82 | SEK 416.73 | SEK 114.92 | SEK 156.59 | n/a | 17.4K | 180 |
CLS-B monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | SEK 1.77 | -4.9% |
| August 2026 | SEK 1.86 | -1.6% |
| July 2026 | SEK 1.89 | -44.9% |
| June 2026 | SEK 3.44 | -7.4% |
| May 2026 | SEK 3.71 | +7.7% |
| April 2026 | SEK 3.45 | -23.2% |
| March 2026 | SEK 4.49 | -25.0% |
| February 2026 | SEK 5.99 | -21.3% |
| January 2026 | SEK 7.61 | +10.6% |
| December 2025 | SEK 6.88 | +0.3% |
| November 2025 | SEK 6.86 | -9.6% |
| October 2025 | SEK 7.59 | -14.2% |
About the CLS-B data
Daily bars. 4,386 sessions from Apr 16, 2009 to Sep 28, 2026, one row per Nasdaq Stockholm 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 Nasdaq Stockholm trading days; minute timestamps are UTC. Prices are in SEK. 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 16, 2009, 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/CLS-B/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on Nasdaq Stockholm
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Common questions
CLS-B share price history
