Odense Steel Shipyard was a Danish shipyard company located in Odense. It was best known for building container ships for its parent group, A.P. Moller – Maersk Group, including the Mærsk E class in 2006 which at the time were the biggest container ships in the world. The global financial crisis led to Maersk announcing its closure in 2009 and the last new ship was delivered in January 2012.

The E class comprises eight 14,770 twenty-foot equivalent unit (TEU) container ships. Each sister ship bears a name beginning with the letter "E". Until 2012, they were the largest container ship ever constructed, and are among the longest ships currently in use at 398 metres (1,306 ft) long and 56 metres (184 ft) wide. They are owned by the Danish A. P. Moller-Maersk Group. The first in the class built was Emma Maersk by Odense Steel Shipyard Ltd., Denmark. The ships Emma, Estelle, and Eugen were subjects of TV documentaries. The E class was followed by the larger and more fuel efficient Triple E class.