| Mariquita | 38.1 | 1911 | William Fife & Sons |
| Marisa Tercera | 30.95 | 2004 | Custom Line |
| Mariska | 27.6 | 1908 | William Fife & Sons |
| Maritimo 100 | 30.8 | 2012 | Oyster Yachts |
| Mariu | 49.9 | 2003 | Codecasa S.p.A. |
| Mariya | 32.91 | 2009 | Sunseeker |
| Marla | 49.99 | 1999 | Amels |
| Marla | 32.5 | 2017 | Numarine |
| Marlena | 32 | 2013 | Jim Smith Tournament Boats Inc. |
| Marlena | 28.96 | 1994 | Lydia Yachts |
| Marlin | 46.7 | 2010 | Heesen Yachts |
| Marlin Delrey V | 40.23 | 1993 | Lürssen Yachts |
| Marlin Magic | 28.42 | 2021 | Viking Yachts |
| Marlinda | 40.32 | 1989 | Delta Marine |
| Marline | 35.97 | 1974 | Cammenga |
| Marlow 97#4 | 30.57 | 2012 | Marlow Yachts |
| Marlyn | 30.27 | 1969 | Cantieri Federigo |
| Marmellata di Mango | 33.53 | 2022 | Riva S.p.A. |
| Marques | 30.2 | 2006 | Benetti SpA |
| Marquisa | 35.3 | 2024 | Azimut Yachts |
| Marquise | 72 | 2003 | Austal |
| Mars | 32.31 | 2014 | MCP Yachts |
| Marsa | 60 | 2024 | Amels |
| Marsha Kay | 34.14 | 2012 | Westport Yachts |
| Martello | 28.5 | 2004 | Astondoa S.A. (Astilleros) |
| Martha Jane | 33.13 | 2021 | Ocean Alexander |
| Maru-maru | 32.2 | 1977 | Dorset Yacht Co |
| Marun | 58 | 2006 | Amels |
| Marvi | 34 | 2006 | Custom Line |
| Marvi De | 32 | 1998 | Admiral |
| Mary | 32.28 | 2023 | Sanlorenzo |
| Mary | 39.65 | 1991 | Broward Marine |
| Mary Kathlene | 42.37 | 1989 | Westport Yachts |
| Mary-Jean II | 61.73 | 2010 | ISA Yachts |
| Maryah | 125 | 2015 | Elefsis Shipyard |
| Marybelle | 40.51 | 1970 | Feadship |
| Maryland Lady | 35.97 | 1948 | Defoe Shipbuilding Co. |
| Mas | 28.25 | 2006 | Overmarine Group SPA |
| Masa | 49.8 | 2019 | Heesen Yachts |
| Masayel | 35 | 1988 | Azimut Yachts |
| Mascalzone Assai | 33.88 | 1930 | William Beardmore |
| Mascot | 45.14 | 1958 | 3.MAJ d.d |
| Masha | 32.5 | 2020 | Numarine |
| Mashallah | 40.23 | 1979 | Toughs Shipyard |
| Mashua Bluu | 29.4 | 2011 | Yachts Industries |
| Masquenada | 51 | 2007 | Penglai |
| Masteka 2 | 37.19 | 2009 | Monte Fino |
| Mastiff | 32 | 1967 | Appledore Shipbuilders Ltd |
| Mat | 44.5 | 2024 | Cantiere delle Marche (CdM) |
| Mata Mua | 38.5 | 1991 | Scheepswerf Friesland |
