Mantena is a Norwegian rolling stock maintenance company owned by the Ministry of Trade, Industry and Fisheries.

It has workshops at Grorud and Lodalen in Oslo, Marienborg in Trondheim as well as in Skien, Drammen, Stavanger and Oresund.

[1] In addition to NSB, customers include CargoNet, Kollektivtransportproduksjon, Ofotbanen, Green Cargo, Hector Rail and Tågkompaniet.

MiTrans, that performs rebuilding of rolling stock, is a wholly owned subsidiary of Mantena.

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