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: October 2018

This chart shows the domestic electricity market shares for each of the six large suppliers, medium and 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.ONnpowerScottish PowerSSECo-operative EnergyFirst UtilityOVO EnergyUtilitaUtility WarehouseGreen Star EnergyBulbSmall 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%0%3%
Q4 201523%12%15%10%11%16%1%3%2%1%2%0%0%3%
Q1 201623%12%15%10%11%15%1%3%2%1%2%0%0%4%
Q2 201623%12%15%10%11%15%1%3%2%1%2%0%0%5%
Q3 201623%12%14%10%11%15%1%3%2%1%2%0%0%5%
Q4 201623%12%14%10%11%15%1%3%2%2%2%0%0%5%
Q1 201722%12%14%9%11%15%2%3%2%2%2%1%0%6%
Q2 201722%12%13%10%11%14%1%3%2%2%2%1%0%7%
Q3 201721%12%13%10%10%14%1%3%3%2%2%1%0%8%
Q4 201720%11%13%10%10%14%1%3%3%2%2%1%1%9%
Q1 201820%11%13%9%10%14%1%3%3%2%2%1%1%9%
Q2 201820%11%13%9%10%14%1%3%3%2%2%1%2%10%

More information

At-a-glance summary

Between Q2 2011 and Q2 2018, the combined electricity market share of the large six suppliers dropped from nearly 100% to 76%. The market share held by medium and small suppliers was 24% in Q2 2018, six percentage points up on Q2 2017.

Between Q2 2017 and Q2 2018, the market share for small suppliers (defined as those who have individual market shares below 1% in either gas or electricity) rose to 10%, up by three percentage points.

Among medium suppliers (defined as those outside the group of six large suppliers but with market shares of 1% or more) growth in market share remains slow, with the exception of Bulb, which has almost doubled its market share in Q2 2018.

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.

We periodically review, typically with a lag of one quarter, the group of suppliers that we define as medium and small.

Date correct
October 2018
Policy area