Siemens Gamesa Renewable Energy S.A., formerly Gamesa Corporación Tecnológica S.A. (Spanish pronunciation: [ɡaˈmesa koɾpoɾaˈθjon teɣnoˈloxika]) and Grupo Auxiliar Metalúrgico S.A., is a Spanish-German wind engineering company based in Zamudio, Biscay, Spain.

It manufactures wind turbines and provides onshore and offshore wind services. It is the world’s second largest wind turbine manufacturer.