About ESB

Electricity Supply Board (ESB) was established in 1927 as a statutory corporation in the Republic of Ireland under the Electricity (Supply) Act 1927. With a holding of 95%, ESB is majority owned by the Irish Government. The remaining 5% is held by the trustees of an Employee Share Ownership Plan.  

As a strong, diversified, vertically integrated utility, ESB operates right across the electricity market: from generation, through transmission and distribution to supply. In addition, ESB extracts further value at certain points along this chain: supplying gas, using our networks to carry fibre for telecommunications, developing electric vehicle public charging infrastructure and more.


ESB is a leading Irish utility focused on providing excellent customer service and maintaining our financial strength. We have a regulated asset base of approximately €9 billion with 43% of electricity generation capacity in the all-island market. We currently supply electricity to approximately 1.5 million customers throughout the island of Ireland. As at 31 December 2014, ESB Group employed approximately 7,000 people.

Our mission is to bring sustainable and competitive energy solutions to all customers and our vision is to be Ireland’s foremost energy company competing successfully in the all-island market.