Electricity supply market shares by company: Domestic (GB)

Chart

Javascript is required to render chart Electricity supply market shares by company: Domestic (GB) .

Source: Ofgem analysis of electricity distribution network operator reports.

Information correct as of: January 2021

This chart shows the domestic electricity market shares for each of the large and medium suppliers and the small suppliers as a group.

Chart tip: To look at a specific data series or to switch a series view on and off, click on a title in the chart legend (e.g. British Gas).

Policy Areas:

  • Electricity - retail markets

Data Table

Electricity supply market shares by company: Domestic (GB)
British GasEDFE.ONnpowerScottish PowerSSEShell EnergyOVOUtilitaUtility WarehouseBulb EnergyOctopus EnergyAvro EnergyGreen Network EnergySmall Suppliers
2004 Q124.0%14.0%21.0%15.0%11.0%14.0%1.0%
2004 Q224.0%14.0%21.0%15.0%12.0%15.0%0.0%
2004 Q324.0%14.0%21.0%15.0%12.0%15.0%0.0%
2004 Q423.0%13.0%21.0%15.0%13.0%15.0%0.0%
2005 Q122.0%13.0%21.0%15.0%13.0%15.0%0.0%
2005 Q222.0%13.0%21.0%15.0%13.0%16.0%1.0%
2005 Q322.0%13.0%20.0%15.0%13.0%16.0%1.0%
2005 Q422.0%13.0%20.0%15.0%13.0%16.0%1.0%
2006 Q122.0%13.0%20.0%15.0%13.0%16.0%0.0%
2006 Q222.0%14.0%20.0%15.0%13.0%16.0%0.0%
2006 Q322.0%14.0%20.0%15.0%12.0%17.0%0.0%
2006 Q422.0%14.0%19.0%16.0%12.0%17.0%0.0%
2007 Q122.0%14.0%19.0%16.0%12.0%18.0%0.0%
2007 Q222.0%14.0%19.0%16.0%12.0%18.0%0.0%
2007 Q322.0%13.0%18.0%16.0%12.0%18.0%0.0%
2007 Q422.0%13.0%18.0%15.0%12.0%18.0%0.0%
2008 Q122.0%13.0%18.0%15.0%12.0%19.0%0.0%
2008 Q222.0%13.0%18.0%15.0%12.0%19.0%0.0%
2008 Q322.0%13.0%18.0%15.0%12.0%19.0%0.0%
2008 Q422.0%13.0%18.0%15.0%12.0%19.0%0.0%
2009 Q122.0%13.0%18.0%15.0%12.0%20.0%0.0%
2009 Q223.0%13.0%18.0%15.0%12.0%20.0%0.0%
2009 Q323.0%13.0%18.0%15.0%12.0%20.0%0.0%
2009 Q423.0%13.0%18.0%14.0%12.0%20.0%0.0%
2010 Q124.0%13.0%17.0%14.0%12.0%20.0%1.0%
2010 Q224.0%13.0%17.0%14.0%12.0%20.0%1.0%
2010 Q324.0%13.0%17.0%14.0%12.0%20.0%1.0%
2010 Q425.0%13.0%17.0%14.0%11.0%20.0%1.0%
2011 Q125.0%13.0%17.0%14.0%11.0%20.0%1.0%
2011 Q225.0%13.0%17.0%14.0%11.0%20.0%1.0%
2011 Q325.0%13.0%17.0%14.0%11.0%19.0%1.0%
2011 Q425.0%13.0%17.0%14.0%11.0%19.0%1.0%
2012 Q125.0%13.0%17.0%14.0%11.0%19.0%1.0%
2012 Q225.0%13.0%17.0%14.0%11.0%19.0%1.0%
2012 Q325.0%13.0%17.0%14.0%11.0%19.0%1.0%
2012 Q424.7%13.0%16.9%13.5%11.7%18.3%1.8%
2013 Q124.8%12.9%16.7%13.4%11.7%18.3%2.2%
2013 Q224.9%13.0%16.6%13.2%11.7%18.2%2.3%
2013 Q325.0%13.0%16.5%13.2%11.7%18.1%2.4%
2013 Q424.3%13.4%16.6%11.9%11.7%17.7%1.1%1.5%1.8%
2014 Q123.9%13.3%16.1%11.7%11.6%17.5%1.4%1.6%3.0%
2014 Q223.8%13.1%15.9%11.5%11.5%17.2%1.8%1.2%1.6%2.4%
2014 Q323.6%13.0%15.6%11.3%11.3%17.0%2.2%1.3%1.7%2.8%
2014 Q423.6%12.9%15.7%11.0%11.2%16.6%2.5%1.5%1.7%3.2%
2015 Q123.6%12.5%15.7%10.9%11.2%16.3%2.8%1.6%1.7%3.6%
2015 Q223.5%12.4%15.7%10.8%11.2%16.1%3.0%1.6%1.7%4.1%
2015 Q323.5%12.2%15.5%10.5%11.1%15.9%3.1%1.7%1.8%4.6%
2015 Q423.5%12.2%15.3%10.2%11.1%15.6%3.2%2.0%1.0%1.8%4.2%
2016 Q123.1%12.0%15.1%10.1%10.8%15.4%3.3%2.3%1.1%1.8%4.9%
2016 Q222.8%12.0%14.6%9.9%10.9%15.3%3.4%2.4%1.3%1.8%5.7%
2016 Q322.6%11.9%14.2%10.1%10.8%15.2%3.3%2.4%1.4%1.8%6.3%
2016 Q422.8%11.8%14.0%9.9%10.7%15.1%3.2%2.4%1.6%1.8%6.8%
2017 Q122.4%11.7%13.5%9.5%11.0%14.9%3.1%2.3%1.8%1.8%8.0%
2017 Q222.3%11.5%13.4%9.6%10.6%14.4%2.9%2.4%1.9%1.8%9.2%
2017 Q321.3%11.7%13.4%9.7%10.4%14.3%2.8%2.6%2.0%1.8%10.2%
2017 Q420.5%11.4%13.5%9.6%10.2%14.2%2.9%2.8%2.1%1.8%11.2%
2018 Q120.3%11.2%13.5%9.3%10.0%13.9%2.8%3.0%2.1%1.8%1.1%10.9%
2018 Q219.9%11.1%13.3%8.9%9.7%13.6%2.7%3.1%2.3%1.8%1.9%11.8%
2018 Q319.4%10.8%13.1%8.6%9.5%13.4%2.6%3.1%2.3%1.8%2.7%1.3%11.4%
2018 Q419.2%10.8%13.0%8.2%10.0%13.0%2.5%4.0%2.3%1.8%3.0%1.6%10.6%
2019 Q118.9%10.8%12.5%8.0%9.8%12.8%2.5%4.5%2.5%1.9%3.7%2.1%10.2%
2019 Q218.9%10.6%12.1%7.7%9.3%12.6%2.8%4.4%2.5%1.9%4.5%2.5%1.0%9.3%
2019 Q318.7%10.6%12.0%7.3%9.1%12.4%2.7%4.2%2.6%1.9%5.0%3.0%1.2%1.1%8.4%
2019 Q418.7%10.7%12.0%6.9%9.2%12.1%2.6%4.0%2.6%1.9%5.4%4.3%1.2%1.1%7.2%
2020 Q118.4%10.6%12.1%6.7%9.2%0.0%2.9%15.8%2.6%1.9%5.7%4.9%1.4%1.1%6.7%
2020 Q218.2%10.7%12.0%6.5%9.1%0.0%2.7%15.3%2.6%1.9%5.7%5.1%1.6%1.4%7.0%
2020 Q318.0%10.4%12.3%5.8%8.9%0.0%2.9%14.9%2.7%1.9%5.9%5.7%1.9%1.3%7.7%

More information

At-a-glance summary

Between Q2 2011 and Q3 2020, the combined electricity market share of the large legacy suppliers dropped from nearly 100% to 70% (the latter includes OVO’s market share after the acquisition of SSE). The market share held by other large, medium and small suppliers was 30% in Q3 2020, up two percentage points from Q2 2020.

Relevance and further information

The evolution of market shares is a useful measure of trends in market concentration. They help us understand the impact between market shares and competitive dynamics and which companies are winning or losing customers.

Methodology

We calculate market shares from the number of meter points on the electricity distribution networks, as provided to us by electricity distribution network operators. 

We classify suppliers by size as follows:

  • ‘Large legacy’ includes suppliers which have held a market share of at least 5% in either fuel since privatisation of the electricity and gas sectors
  • ‘Other large’ includes suppliers with market share of at least 5% in either fuel, having increased market share from below 5% at the time of privatisation
  • ‘Medium’ includes suppliers with market share exceeding 1%, but remaining below 5% in both fuels
  • ‘Small’ includes suppliers with market share below 1% in both fuels

We periodically review, typically with a lag of two quarters, the group of suppliers that we define as ‘other large’, ‘medium’ and ‘small’.

Due to the formatting of older data sources, figures prior to Q4 2012 do not contain decimal places. Rounding errors may mean that the combined market share across all suppliers does not exactly sum to 100%.

Date correct
January 2021
Policy area