LSE · SYS1 · stock
System1 Group PLC (SYS1) stock price history
Every LSE trading session of System1 Group PLC from Dec 5, 2006 to Nov 13, 2026: 3,239 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.
SYS1 adjusted close, 2006 to 2026
- £10.23
- All time high, 2017
- £3.70
- 52 week high, £1.70 low
- 3,239
- Daily sessions since 2006
Last updated Nov 13, 2026, the last stored session. Refreshes after each trading day. Full 2006 to 2026 series and minute bars.
SYS1 key facts
- System1 Group PLC (SYS1) closed at £3.10 on Nov 13, 2026 on LSE.
- SYS1's all time high close is £10.23, set on May 8, 2017; its all time low close is £0.8994 on May 29, 2020.
- SYS1's 52 week range is £1.70 to £3.70.
- SYS1 returned +37.8% over the year to Nov 13, 2026 and -11.9% over five years.
- Over ten years SYS1 returned -35%, -4.2% a year compounded.
- SYS1's deepest drawdown was -91.2% from May 8, 2017 to May 29, 2020.
- DataCedar holds 3,239 daily sessions of SYS1 history from Dec 5, 2006 and minute bars from Sep 17, 2026, adjusted for splits and dividends, served by the API under a key.
SYS1 price chart, 2006 to 2026
SYS1 returns
Price return from the last close on or before the window start to Nov 13, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -11.4% |
| 3 months | -4.6% |
| 6 months | +7.7% |
| Year to date | +37.8% |
| 1 year | +37.8% |
| 3 years | +61.6% |
| 5 years | -11.9% |
| 10 years | -34.6% |
| Since Dec 5, 2006 | +127.9% |
| Compound annual growth, 19.9 years | +4.2% |
SYS1 records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- £10.23 on May 8, 2017
- All time low close
- £0.8994 on May 29, 2020
- 52 week high
- £3.70 on Sep 24, 2026
- 52 week low
- £1.70 on Feb 26, 2026
- Deepest drawdown
- -91.2% from May 8, 2017 to May 29, 2020, not yet recovered
- Best single session
- +37.2% on Jan 12, 2009
- Worst single session
- -35.0% on Sep 23, 2025
- Volatility, 1 year annualised
- 63.2%
- Sessions closing higher, 1 year
- 23%
- Growth of 1 since 2006
- 2.3×
- Best calendar year
- 2021, +125%
- Worst calendar year
- 2022, -65%
SYS1 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. 2006 starts on Dec 5, 2006; 2026 runs to Nov 13, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | £2.25 | £3.70 | £1.70 | £3.10 | +37.8% | 8M | 186 |
| 2025 | £6.20 | £6.40 | £1.93 | £2.25 | -63.7% | 5.8M | 153 |
| 2024 | £2.95 | £8.07 | £2.80 | £6.20 | +103.3% | 9.4M | 156 |
| 2023 | £1.22 | £3.16 | £1.15 | £3.05 | +117.9% | 735.4K | 137 |
| 2022 | £4.00 | £4.80 | £1.40 | £1.40 | -65.0% | 1.6M | 111 |
| 2021 | £1.77 | £4.05 | £1.60 | £4.00 | +125.4% | 2.6M | 120 |
| 2020 | £2.18 | £3.00 | £0.8494 | £1.77 | -13.4% | 2.8M | 126 |
| 2019 | £2.15 | £2.58 | £1.66 | £2.05 | -4.6% | 798.3K | 142 |
| 2018 | £3.97 | £3.99 | £1.71 | £2.15 | -40.7% | 5M | 136 |
| 2017 | £5.59 | £10.48 | £3.50 | £3.62 | -34.1% | 3.7M | 202 |
| 2016 | £3.49 | £5.57 | £2.60 | £5.49 | +54.3% | 3.9M | 167 |
| 2015 | £3.79 | £4.34 | £3.42 | £3.56 | -7.3% | 2.1M | 155 |
| 2014 | £3.31 | £5.45 | £3.14 | £3.84 | +15.8% | 1.3M | 158 |
| 2013 | £2.11 | £3.44 | £1.96 | £3.31 | +49.3% | 1.1M | 140 |
| 2012 | £2.96 | £3.66 | £2.09 | £2.22 | -25.0% | 2M | 152 |
| 2011 | £2.03 | £3.05 | £1.99 | £2.96 | +45.7% | 6.7M | 138 |
| 2010 | £1.31 | £2.19 | £1.31 | £2.03 | +58.4% | 7.2M | 199 |
| 2009 | £0.9367 | £1.53 | £0.8770 | £1.28 | +36.7% | 63.6K | 223 |
| 2008 | £1.47 | £1.54 | £0.9128 | £0.9367 | -36.3% | 860.9K | 232 |
| 2007 | £1.34 | £2.30 | £1.33 | £1.47 | +9.7% | 997.8K | 192 |
| 2006 | £1.18 | £1.43 | £1.08 | £1.34 | n/a | 230K | 14 |
SYS1 monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| November 2026 | £3.10 | -8.8% |
| October 2026 | £3.40 | -5.6% |
| September 2026 | £3.60 | +7.5% |
| August 2026 | £3.35 | +3.1% |
| July 2026 | £3.25 | +4.2% |
| June 2026 | £3.12 | +2.3% |
| May 2026 | £3.05 | +5.9% |
| April 2026 | £2.88 | +5.9% |
| March 2026 | £2.72 | +37.4% |
| February 2026 | £1.98 | -14.7% |
| January 2026 | £2.32 | +3.1% |
| December 2025 | £2.25 | +5.6% |
About the SYS1 data
Daily bars. 3,239 sessions from Dec 5, 2006 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 12, 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 Dec 5, 2006, 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%3ASYS1/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on LSE
Common questions
SYS1 share price history
