LSE · CNS · stock
Corero Network Security plc (CNS) stock price history
Every LSE trading session of Corero Network Security plc from Oct 31, 1996 to Nov 13, 2026: 6,215 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.
CNS adjusted close, 1996 to 2026
- £41.55
- All time high, 2000
- £0.1750
- 52 week high, £0.0650 low
- 6,215
- Daily sessions since 1996
Last updated Nov 13, 2026, the last stored session. Refreshes after each trading day. Full 1996 to 2026 series and minute bars.
CNS key facts
- Corero Network Security plc (CNS) closed at £0.1600 on Nov 13, 2026 on LSE.
- CNS's all time high close is £41.55, set on Feb 18, 2000; its all time low close is £0.0250 on Sep 23, 2019.
- CNS's 52 week range is £0.0650 to £0.1750.
- CNS returned +60.0% over the year to Nov 13, 2026 and +73.0% over five years.
- Over ten years CNS returned +51%, +4.2% a year compounded.
- CNS's deepest drawdown was -99.9% from Feb 18, 2000 to Sep 23, 2019.
- DataCedar holds 6,215 daily sessions of CNS history from Oct 31, 1996 and minute bars from Sep 17, 2026, adjusted for splits and dividends, served by the API under a key.
CNS price chart, 1996 to 2026
CNS returns
Price return from the last close on or before the window start to Nov 13, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | +33.3% |
| 3 months | +142.4% |
| 6 months | +36.2% |
| Year to date | +67.5% |
| 1 year | +60.0% |
| 3 years | +77.8% |
| 5 years | +73.0% |
| 10 years | +50.6% |
| Since Oct 31, 1996 | -99.3% |
| Compound annual growth, 30.0 years | -15.4% |
CNS records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- £41.55 on Feb 18, 2000
- All time low close
- £0.0250 on Sep 23, 2019
- 52 week high
- £0.1750 on Oct 20, 2026
- 52 week low
- £0.0650 on Aug 13, 2026
- Deepest drawdown
- -99.9% from Feb 18, 2000 to Sep 23, 2019, not yet recovered
- Best single session
- +47.1% on Jun 29, 2020
- Worst single session
- -50.7% on Aug 19, 2019
- Volatility, 1 year annualised
- 62.2%
- Sessions closing higher, 1 year
- 18%
- Best calendar year
- 2024, +139%
- Worst calendar year
- 2000, -63%
CNS 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. 1996 starts on Oct 31, 1996; 2026 runs to Nov 13, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | £0.0955 | £0.1750 | £0.0650 | £0.1600 | +67.5% | 116.7M | 207 |
| 2025 | £0.1970 | £0.2060 | £0.0850 | £0.0955 | -51.5% | 70.8M | 213 |
| 2024 | £0.0825 | £0.2930 | £0.0755 | £0.1970 | +138.8% | 121.8M | 202 |
| 2023 | £0.0960 | £0.1065 | £0.0550 | £0.0825 | -10.8% | 55.6M | 155 |
| 2022 | £0.1250 | £0.1496 | £0.0900 | £0.0925 | -26.0% | 29.8M | 139 |
| 2021 | £0.1000 | £0.1688 | £0.0875 | £0.1250 | +25.0% | 83.1M | 155 |
| 2020 | £0.0550 | £0.1185 | £0.0360 | £0.1000 | +60.6% | 26.2M | 151 |
| 2019 | £0.1152 | £0.1195 | £0.0235 | £0.0622 | -50.2% | 24M | 132 |
| 2018 | £0.0695 | £0.1360 | £0.0535 | £0.1250 | +85.2% | 18.2M | 155 |
| 2017 | £0.0875 | £0.1350 | £0.0475 | £0.0675 | -22.9% | 55.9M | 183 |
| 2016 | £0.1590 | £0.3275 | £0.0800 | £0.0875 | -43.5% | 32.8M | 180 |
| 2015 | £0.1550 | £0.1600 | £0.0975 | £0.1550 | 0.0% | 13.5M | 163 |
| 2014 | £0.1726 | £0.2600 | £0.1185 | £0.1550 | -12.7% | 11.6M | 147 |
| 2013 | £0.3040 | £0.3300 | £0.1185 | £0.1775 | -45.4% | 31M | 165 |
| 2012 | £0.4500 | £0.6250 | £0.2800 | £0.3250 | -27.0% | 5.7M | 154 |
| 2011 | £0.4000 | £0.5200 | £0.3100 | £0.4450 | +11.3% | 4.4M | 181 |
| 2010 | £0.4050 | £0.4750 | £0.2550 | £0.4000 | -1.2% | 638.5K | 228 |
| 2009 | £0.7125 | £0.9390 | £0.3325 | £0.4050 | -43.2% | 12.1K | 239 |
| 2008 | £1.91 | £1.95 | £0.6000 | £0.7125 | -62.8% | 57.5K | 248 |
| 2007 | £4.35 | £5.85 | £1.58 | £1.91 | -56.0% | 213.8K | 223 |
| 2006 | £3.90 | £6.42 | £2.37 | £4.35 | +11.5% | 202.7K | 207 |
| 2005 | £5.55 | £7.65 | £3.75 | £3.90 | -29.7% | 248.1K | 260 |
| 2004 | £11.24 | £15.38 | £4.55 | £5.55 | -50.6% | 176.8K | 259 |
| 2003 | £7.50 | £15.23 | £5.63 | £11.24 | +49.8% | 100.4K | 260 |
| 2002 | £8.25 | £12.45 | £6.45 | £7.50 | -9.1% | 1.4K | 261 |
| 2001 | £12.00 | £12.00 | £4.50 | £8.25 | -31.3% | 3.3K | 261 |
| 2000 | £32.55 | £41.55 | £12.00 | £12.00 | -63.1% | 0 | 260 |
| 1999 | £15.15 | £40.05 | £15.15 | £32.55 | +114.9% | 0 | 261 |
| 1998 | £18.58 | £22.72 | £10.02 | £15.15 | -18.5% | 0 | 261 |
| 1997 | £22.32 | £22.32 | £15.37 | £18.58 | -16.8% | 0 | 261 |
| 1996 | £24.19 | £24.73 | £22.05 | £22.32 | n/a | 0 | 44 |
CNS monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| November 2026 | £0.1600 | +4.9% |
| October 2026 | £0.1525 | +35.6% |
| September 2026 | £0.1125 | +55.2% |
| August 2026 | £0.0725 | -12.1% |
| July 2026 | £0.0825 | -23.3% |
| June 2026 | £0.1075 | 0.0% |
| May 2026 | £0.1075 | -14.0% |
| April 2026 | £0.1250 | +4.2% |
| March 2026 | £0.1200 | -7.7% |
| February 2026 | £0.1300 | +8.3% |
| January 2026 | £0.1200 | +25.7% |
| December 2025 | £0.0955 | -4.5% |
About the CNS data
Daily bars. 6,215 sessions from Oct 31, 1996 to Nov 13, 2026, one row per LSE 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 Nov 3, 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 LSE trading days; minute timestamps are UTC. Prices are in GBP. 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 Oct 31, 1996, 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/lse%3ACNS/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on LSE
Common questions
CNS share price history
