| Name | Sailor ID | Most Recent Declaration |
|---|---|---|
| Edouard Masse | FRAEM6 | |
| Theo Masse | FRATM48 | 80.0kg - Amateur |
| Yannick Massus | FRAYM3 | 73.0kg - Amateur |
| Kelvin Matthews | GBRKM36 | 70.0kg - Professional |
| Kirsty Matthews | GBRKM45 | |
| Bo Maywald | GERBM28 | 79.0kg - Amateur |
| Richard McAdam | GBRRM2 | 100.0kg - Amateur |
| Duncan Mccarthy | GBRDM18 | 78.0kg - Amateur |
| Pete Mccoy | GBRPM40 | 108.0kg - Professional |
| Robbie Mccutcheon | GBRRM132 | |
| Robert Mccutcheon | GBRRM134 | 79.0kg - Amateur |
| Lisa McDanell | GBRLM33 | 64.0kg - Amateur |
| Lisa Mcdannell | GBRLM233 | 64.0kg - Amateur |
| Ross McDonald | IRLRM2 | 77.0kg - Amateur |
| Dan Mcgany | GBRDM103 | 94.0kg - Amateur |
| Evert Mcglaughlin | CANEM9 | |
| Cillian McGreer | IRLCM68 | |
| Tor Mclaren | GBRTM47 | 63.0kg - Amateur |
| Rory Mclean | GBRRM74 | 95.0kg - Professional |
| Andy McLean | NZLAM5 | |
| Ewan Mcmahon | IRLEM38 | 84.0kg - Amateur |
| Nick Meadow | GBRNM75 | 103.0kg - Amateur |
| Murat Mekikci | TURMM5 | |
| Murat Mekikci | TURM1 | 80.0kg - Amateur |
| Harry Melges | USAHM42 |