 | Maritime Carrier Shipping GmbH, Hamburg | |
 | A.P. Møller - Mærsk A/S, Copenhagen | |
 | Malta Motorways of the Sea Ltd., Valletta | |
 | Mammoet Europe B.V., Schiedam | |
 | Maple Leaf Shipping Co.Ltd., Taizhou | |
 | Maran Tankers Management Inc., Athens | |
 | MarConsult Schiffahrt (GmbH & Co.) KG, Hamburg | |
 | Marpro Shipping B.V., Hendrik-Ido-Ambacht | |
 | Marfin Management S.A.M., Monte Carlo | |
 | Marseille Fret S.A., Marseille | |
 | Marida Tankers Inc., Norwalk | |
 | Marine Management Services M.C., Piraeus | |
 | Marinvest AB, Göteborg | |
 | Marmaras Navigation Ltd., Piraeus | |
 | Marnavi S.p.A., Napoli | |
 | Maryville Maritime Inc., Kifisia | |
 | Massoel Ltd., Geneva | |
 | Masterbulk Pte.Ltd., Singapore | |
 | Mastermind Shipmanagement Ltd., Limassol | |
 | MCCL Mediterranean Car-Carriers Line S.A., Piraeus | |
 | Mega Chemicals Schiffahrt AG, Zürich | |
 | Med Marine Holding A.S., Istanbul | |
 | Mediterranea di Navigazione S.p.A., Ravenna | |
 | Mednav Group, Rome | |
 | Meerpahl & Meyer GmbH, Buxtehude | |
 | Megacore Shipping Ltd., Athens | |
 | O.H. Meling & Co. AS, Stavanger | |
 | Mercator Lines (Singapore) Ltd., Singapore | |
 | Karl Meyer Reederei GmbH & Co.KG, Wischhafen | |
 | Meyering Bereederungs GmbH & Co.KG, Haren/Ems | |
 | Midgard International Ltd., Bergen | |
 | MST Mineralien Schiffahrtsspedition & Transport GmbH & Co.KG, Schnaittenbach | |
 | Minerva Marine Inc., Piraeus | |
 | MISC Malaysian International Shipping Corporation Berhad, Kuala Lumpur | |
 | Misje Rederi AS, Bergen | |
 | Mitsui O.S.K. Lines Co.Ltd., Tokyo | |
 | Moana Shipping C.V., Papendrecht | |
 | Modion Maritime Management S.A., Kifissia | |
 | Reederei Moje GmbH & Co.KG, Drochtersen | |
 | Molo Sun AS, Aalesund | |
 | Montanari Navigazione S.p.A., | |
 | Morevest Shipping Co.Ltd., Limassol | |
 | Motia Compagnia di Navigazione S.p.A., Venedig | |
 | Nicholas G. Moundreas Shipping S.A. | |
 | Mowinckel Shipmanagement AS | |
 | MPI Offshore B.V., Breskens | |
 | MRC Denizcilik Turizm A.S., Istanbul | |
 | MSC Mediterranean Shipping Company S.A., Geneva | |
 | MSC Cruise Line S.A., Geneva | |
 | MTM Shipmanagement Pte.Ltd., Singapore | |
 | MTS Group Ltd., Falmouth | |
 | Rederij T. Muller B.V., Dordrecht | |
 | Otto A. Müller GmbH, Hamburg | |
 | Multraship Towage & Salvage B.V., Terneuzen | |
 | MPC Münchmeyer Petersen Steamship GmbH & Co.KG, Hamburg | |
 | Mur Shipping Denmark A/S, Copenhagen | |
 | Murmansk Shipping Company, Murmansk | |
 | Mylaki Shipping Agency Ltd., Piraeus | |
 | Myrte Shipping B.V., Papendrecht |