 This study examined the performance of 47 offshore wind energy companies in nine European countries over two time periods. It found that there was no significant correlation between the scores of relative efficiency and the location of the company. However, the results were consistent with the hypothesis that improvements in financial indicators would be necessary for greater efficiency. This suggests that the allocation of resources among these companies could be improved through better management practices. This article was authored by Dario Maradin, Boyana Aljikdrasanovich and Sasa Sieger.