Electricity supply market shares by company: Domestic (GB)


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: April 2018

This chart shows the domestic electricity market shares for each of the six large suppliers, six medium sized suppliers and other suppliers (presented in aggregate as ‘small suppliers’).

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.ONRWE npowerScottish PowerSSECo-operative EnergyFirst UtilityOVOUtilitaUtility WarehouseGreen Star EnergySmall Suppliers
Q1 200424%14%21%15%11%14%1%
Q2 200424%14%21%15%12%15%0%
Q3 200424%14%21%15%12%15%0%
Q4 200423%13%21%15%13%15%0%
Q1 200522%13%21%15%13%15%0%
Q2 200522%13%21%15%13%16%1%
Q3 200522%13%20%15%13%16%1%
Q4 200522%13%20%15%13%16%1%
Q1 200622%13%20%15%13%16%0%
Q2 200622%14%20%15%13%16%0%
Q3 200622%14%20%15%12%17%0%
Q4 200622%14%19%16%12%17%0%
Q1 200722%14%19%16%12%18%0%
Q2 200722%14%19%16%12%18%0%
Q3 200722%13%18%16%12%18%0%
Q4 200722%13%18%15%12%18%0%
Q1 200822%13%18%15%12%19%0%
Q2 200822%13%18%15%12%19%0%
Q3 200822%13%18%15%12%19%0%
Q4 200822%13%18%15%12%19%0%
Q1 200922%13%18%15%12%20%0%
Q2 200923%13%18%15%12%20%0%
Q3 200923%13%18%15%12%20%0%
Q4 200923%13%18%14%12%20%0%
Q1 201024%13%17%14%12%20%1%
Q2 201024%13%17%14%12%20%1%
Q3 201024%13%17%14%12%20%1%
Q4 201025%13%17%14%11%20%1%
Q1 201125%13%17%14%11%20%1%
Q2 201125%13%17%14%11%20%1%
Q3 201125%13%17%14%11%19%1%
Q4 201125%13%17%14%11%19%1%
Q1 201225%13%17%14%11%19%1%
Q2 201225%13%17%14%11%19%1%
Q3 201225%13%17%14%11%19%1%
Q4 201225%13%17%14%12%18%0%1%0%0%0%0%
Q1 201325%13%17%13%12%18%0%1%1%0%0%0%1%
Q2 201325%13%17%13%12%18%0%1%1%0%0%0%1%
Q3 201325%13%16%13%12%18%0%1%0%0%0%0%1%
Q4 201324%13%16%12%12%18%1%1%0%0%1%0%1%
Q1 201424%13%16%12%12%17%1%1%1%0%2%0%1%
Q2 201424%13%16%12%11%17%1%2%1%0%2%0%1%
Q3 201424%13%16%11%11%17%1%2%1%0%2%0%2%
Q4 201424%13%16%11%11%17%1%3%1%1%2%0%2%
Q1 201524%13%16%11%11%16%1%3%2%1%2%0%2%
Q2 201524%12%16%11%11%16%1%3%2%1%2%0%2%
Q3 201524%12%16%11%11%16%1%3%2%1%2%0%3%
Q4 201523%12%15%10%11%16%1%3%2%1%2%0%3%
Q1 201623%12%15%10%11%15%1%3%2%1%2%0%4%
Q2 201623%12%15%10%11%15%1%3%2%1%2%0%5%
Q3 201623%12%14%10%11%15%1%3%2%1%2%0%5%
Q4 201623%12%14%10%11%15%1%3%2%2%2%0%5%
Q1 201722%12%14%9%11%15%2%3%2%2%2%1%6%
Q2 201722%12%13%10%11%14%1%3%2%2%2%1%7%
Q3 201721%12%13%10%10%14%1%3%3%2%2%1%8%
Q4 201720%11%13%10%10%14%1%3%3%2%2%1%9%

More information

At-a-glance summary

Between 2011 and 2017, the combined electricity market share of the large six suppliers dropped from nearly 100% to 79%.

Until 2012, small and medium suppliers held a market share below 2%. This increased to 21% in Q4 2017, five percentage points up on Q4 2016. Most of the increase between Q4 2016 and Q4 2017 was due to the increase in the market shares of small (defined as those who have individual market shares below 1%) suppliers.

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, both for the six large suppliers and other suppliers, and which companies are winning or losing customers.


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

Date correct
April 2018
Policy area