Offshore Wind Energy grew by more than 50% in 2010 and is expected to continue at above 50% growth rates over the next several years as the global installed offshore wind capacity multiples by more than 25 times over the next 10 years.The massive investments and government interest in offshore wind farms has attracted a number of companies to this sector.Top Wind Turbine Companies are leading the pack as it falls right in their domain of expertise as Wind Turbines form almost 50% of the cost of a offshore wind park.Other companies with expertise in related areas such as building foundations for the giant 5 MW and greater capacity offshore wind turbines and the logistics in transporting them also get involved.Shipbuilders from South Korea and Northrop Gruman are also getting in through JV and M&A.European Wind Companies are leading the pack as almost 80% of the current global capacity has been installed in Northern Europe.Also these companies possess a high level of expertise at building and designing wind turbines.Here is a list of the major offshore wind turbine companies.