Ship Builders
Feodosiyskaya Sudostroitelnaya Company "Morye"
- Feodosia, Ukraine
Maaskant Shipyards
- Stellendam, Netherlands
Macduff Shipyards
- Macduff, United Kingdom
Mackay Boatbuilders
- Arbroath, United Kingdom
Scheepswerf Made
- Made, Netherlands
Madenci Gemi Sanayii
- Eregli, Turkey
Magra
- Gdynia, Poland
Main Iron Works Inc.
- Houma, La, United States of America
Mainstay Marine Solutions
- Pembroke Dock, United Kingdom
Malakoff
- Lerwick, United Kingdom
Malaysia Shipyard & Engineering
- Johor, Malaysia
Malin Marine
- Renfrew, United Kingdom
Malta Shipbuilding Co.
- Marsa, Malta
Ateliers et Chantiers de la Manche
- Dieppe, France
Manche Industrie Marine
- Dieppe, France
Manchester Dry Docks Co.
- Ellesmere Port, United Kingdom
Mandals Slip & Mekaniske Verksted
- Mandal, Norway
Manor Marine
- Portland, United Kingdom
Marietta Manufacturing Co.
- Point Pleasant, Va, United States of America
Marine Industries
- Sorel, Canada
Marine Projects
- Gdansk, Poland
Marinette Marine Corporation
- Marinette, Wi, United States of America
Marinewerft
- Wilhelmshaven, Germany
T. Mariotti Shipyard
- Genoa, Italy
Maritim Shipyard
- Gdansk, Poland
Marmara Tersanesi
- Yarimca, Turkey
FEAB Marstrandsverken
- Marstrand, Sweden
Stocznia Marynarki Wojennej
- Gdynia, Poland
Gdynska Stocznia Marynarki Wojennej
- Gdynia, Poland
Matsuura Tekko Zosen
- Higashino, Japan
McCrindle Shipbuilding
- Ardrossan, United Kingdom
McDermott Shipyards
- Amelia, La and New Iberia, La, United States of America
Hugh McLean & Son
- Renfrew, United Kingdom
McTay Marine
- Bromborough, United Kingdom
Med Yilmaz Gemi San
- Karadeniz Ereğli, Turkey
Société des Forges et Chantiers de la Méditerranée
- La Seyne, France
Constructions Navales et Industrielles de la Méditerranée
- La Seyne, France
Meercat Workboats
- Southampton, United Kingdom
MSW - Meidericher Schiffswerft
- Duisburg-Meiderich, Germany
Meltem Beykoz Tersanesi
- Beykoz, Turkey
Ernst Menzer-Werft
- Geesthacht and Hamburg-Bergedorf, Germany
Mercantile-Beliard
- Oostende, Belgium
Mercantile Marine Yard
- Rupelmonde, Belgium
Mervyn Street
- Gravesend, United Kingdom
Scheepswerf "De Merwede"
- Hardinxveld-Giessendam, Netherlands
MetalShips & Docks
- Vigo, Spain
Peter Matheson
- Scarfskerry, United Kingdom
Scheepswerf Metz
- Urk, Netherlands
Meyer Werft
- Papenburg, Germany
Mie Shipyard Co.
- Yokkaichi, Japan