The European Union׳s Integrated Maritime Policy (EU IMP) is being developed in the framework of a process that is reshaping maritime geographical scenarios and world geopolitics. This process is characterised by a change in States׳ territoriality resulting from their jurisdictional expansion. Over 60% of coastal States in the world possess territory with a more extensive maritime component than the terrestrial component which helps to reaffirm the fragmentation of maritime space and stresses the national vision of the oceans. Unlike the process of ocean space fragmentation that results from its nationalisation the EU Integrated Maritime Policy has a global and cooperative vision, which is particularly evident in the Atlantic Strategy. In this context, this article aims to: (i) provide a first estimate of the size and extent of the territorial changes resulting from jurisdictional claims available to date and their mapping; (ii) consider the case of the European Union as one of special significance with its express policy of maritime spatial projection. The conclusions point to a redefinition of the large territorial pieces of the global geopolitics puzzle and the emergence of a new Atlanticism associated with the EU׳s maritime policy.