A.P. Moller–Maersk Group (Danish: "A.P. Møller–Mærsk A/S", ), also known as Maersk, is a Danish business conglomerate. A.P. Møller – Maersk Group has activities in a variety of business sectors, primarily within the transportation and energy sectors. It has been the largest container ship operator and supply vessel operator in the world since 1996.