It had a market capitalisation of approximately £16.9 billion as of 23 December 2011, making it the 24th-largest company on the London Stock Exchange.

[6] In August 2010 the company announced a tie-up with GDF Suez via a reverse takeover whereby GDF Suez transferred its Energy International Business Areas (outside Europe) and certain assets in the UK and Turkey to International Power in exchange for 70% of the stock of the combined entity.

[9] On 16 April 2012, GDF Suez announced the purchase of the remaining 30% of International Power and the transaction closed in July 2012.

[5] International Power has a pipeline of large projects in the emerging markets; namely South America, the Middle East, South-East Asia - representing approximately 13 GW generating capacity and expected to be completed between 2014 and 2017.

[10] The purchase of IP will boost GDF Suez' presence in the growing energy demand regions.