We have so far registered 4,561 shipyards
| Name | | MacKay Bros. Alloa, Skottland. |
| Mackie & Thomson, Glasgow, UK |
| Mads Svensen, Grimstad |
| Maine, USA |
| Maitland, Nova Scotia, Cananda |
| Malster & Reany, Baltimore, Maryland, USA |
| Malta Shipbuilding Co. Ltd., Marsa |
| Malta Shipbuilding Co. Ltd. Valetta, Malta |
| Mandal |
| Mandal Skipsbyggeri, Mandal |
| Mandal Slip/Båtservice Verft, Mandal |
| Mandal Slip & Mek. Verk, Mandal |
| Mangone S.B. Comp., Houston, TX, USA |
| Manitowoc Shipbuilding Corp., Manitowoc, Wisconsin, U.S.A |
| Manul Pires Guerrero, Setubal |
| Marine Industries Ltd., Sorel, QE. Canada |
| Marinens Hovedverft, Horten, Norge |
| Marine Project Ltd Spoo, Gdansk |
| Marinewerft, Wilhelmshaven, Tyskland |
| Marinship Corporation, Sausalito, CA, USA |
| Marin Ship Corp., Sausalito, California |
| Marinvarvet/Valdemarksvik Båtbyggeri A/B, Sverige |
| Maritime Partner A/S, Ålesund |
| Maritime Shipyard Sp.z.o.o, Gdansk |
| Maritim Ltd., Gdansk |
