Vi har så langt registrert 4 561 verft
| Navn | | Mattapoisett, Rochester, MA, USA |
| Matthew Pearse & Co. Stockton on Tees, England |
| Matthews Shipbuilding Co., Hoquiam, Washington, USA |
| Maudslay, Sons & Field, Greenwich, London, England |
| Maudslay & Sons, London |
| Mauritz Hulthen, Uddevalla, Sverige |
| Maxon & Fish & Co. Mystic, Connecticut, USA |
| May, Shoreham, UK |
| Mazagon Dock Ltd, Mumbai, India |
| Mc Ateer S.B., Co., Seattle, WA, USA |
| McCloskey & Co. Tampa, Fl. USA |
| McDonald, New Glasgow, Pictou, Nova Scotia, Canada |
| McDonald, St. John, New Brunswick, Canada |
| McDonalds Yard, Bideford, Prince Edward Island, Canada |
| McDougall-Duluth Company, Duluth MN, USA |
| McDougall, Five Mile River, Maitland, Nova Scotia, Canada |
| McDougall, Prince Edward Island, Canada |
| McEachern Ship Corp., Astoria OR, USA |
| McFee, St. John, New Brunswick, Canada |
| McIntyre & Co., Newcastle, UK |
| McKay, Quebec, Canada |
| McKay & Warner, Quebec, Canada |
| McKean, Dundas, Prince Edward Island, Canada |
| McKenzie & Lauder, River John, Nova Scotia, Canada |
| McLachlan & Stockhouse St..John, New, Brunswick, Canada |
