DONG Energy is strongly involved in the production and expansion of renewable energy in the UK. The company currently operates the offshore wind farms Gunfleet Sands (172 MW), Burbo Bank (90 MW), Barrows (90 MW) and Walney 1 (184 MW). In addition, DONG Energy is involved in building four new major UK offshore wind farms, including what will be the world's largest offshore wind farm London Array (630 MW), due to enter into operation in 2012.
Marubeni Corporation is one of the 5 largest Japanese trading companies with activities in multiple business areas, including food products, materials, chemicals, energy, metals and mineral resources, transportation machinery. Marubeni's activities also extend to power projects and infrastructure and Marubeni has a large business unit within energy and is an EPC-contractor as well as an owner of Independent Power Producer (IPP) around the world. Marubeni entered into the IPP business in 1992, and holds a global power asset portfolio of Net 8,796MW in 23 countries. It is Marubeni's current strategy to increase its portfolio to Net 11,000MW within a couple of years with renewable energy assets representing 10% of the portfolio.