A.P. Moller Maersk Group, also known as Maersk, is a Danish business conglomerate. A.P. Moller Maersk Group has activities in a variety of business sectors, primarily within the transportation and energy sectors. It is the largest container ship operator and supply vessel operator in the world since 1996. A.P. Moller Maersk Group is based in Copenhagen, Denmark, with subsidiaries and offices in more than 135 countries worldwide and around 108,000 employees.