The company was founded in 1990 by the Scottish Electricity plc and Scottish Nuclear Ltd. It was privatised in 1991, and became a subsidiary of the Spanish Iberdrola in 2007.
ScottishPower has around 5 million customers in the UK, and around 1 million customers in Ireland. It is the third largest energy supplier in the UK, and the second largest in Ireland.
The company generates electricity from a variety of sources, including nuclear, coal, gas, and renewable energy. It also operates a number of wind farms and other renewable energy projects.
ScottishPower is committed to reducing its carbon footprint, and has pledged to invest £2 billion in renewable energy projects by 2020. The company is also working to develop new technologies to make its operations more efficient and less harmful to the environment.