| MASPRO 0536698 · TMA313637 · design | an individual | 7 Machines9 Electronics | Registered | 1986 |
| MSPURE 2275168 | an individual | 7 Machines11 Lighting | Pending | 2023 |
| MISPRO 2084783 | MISPRO BIOTECH SERVICES INC. | 35 Advertising36 Finance37 Construction+4 | Pending | 2021 |
| MXPRESS 1512466 · TMA835240 | an individual | 9 Electronics16 Paper42 Science | Registered | 2012 |
| MOSPORT 0896526 · TMA513423 | Canadian Motorsport Ventures Ltd. | 35 Advertising41 Education | Registered | 1999 |
| MOSPORT 0896525 · TMA522493 · design | Canadian Motorsport Ventures Ltd. | 4 Oils12 Vehicles14 Jewellery+5 | Registered | 2000 |
| MASPORT 0566984 · TMA336505 | MASPORT LIMITED | 11 Lighting | Registered | 1988 |
| MOSPORT 0327713 · TMA181607 | Canadian Motorsport Ventures Ltd. | 12 Vehicles14 Jewellery16 Paper+2 | Registered | 1972 |
| MASPORT 0325225 · TMA171903 | MASPORT LIMITED | 7 Machines12 Vehicles25 Clothing | Registered | 1970 |
| MASKPRO 2027872 | ENTREPRISE PRÉMONT INC. | 9 Electronics10 Medical25 Clothing | Pending | 2020 |
| MASKPRO 2027200 · design | Zentrix Industries Limited | 9 Electronics | Pending | 2020 |
| MAGSPERSE 1181839 · TMA671466 | PRODUITS CHIMIQUES MAGNUS LTEE | 1 Chemicals | Registered | 2006 |
| MySubaru 2291101 · TMA1276593 | SUBARU CORPORATION | 9 Electronics42 Science | Registered | 2024 |
| MESIBAR 2257120 · TMA1271650 · design | Shenzhen Brosvapor Technology Co. Ltd. | 34 Tobacco | Registered | 2024 |
| MoxiPrint 2237943 · TMA1205509 | an individual | 40 Treatment | Registered | 2023 |
| Moosfor 2218786 · TMA1245589 | Yiwu CunFang Trading Co., Ltd | 24 Textiles | Registered | 2024 |
| Mckfors 2216317 · TMA1243234 | Shenzhen Yihaoxing Technology Co., Ltd. | 21 Housewares | Registered | 2024 |
| Mycoform 2210643 · TMA1242948 | MycoForm Corp. | 19 Building | Registered | 2024 |
| MAXBROTHERS 2196627 · TMA1237296 | an individual | 12 Vehicles | Registered | 2024 |
| MaxPro 2180572 · TMA1212508 | Owner not shown | 1 Chemicals | Registered | 2023 |
| mookifree 2174999 · TMA1227015 | an individual | 25 Clothing | Registered | 2024 |
| MIXPOWER 2172590 · TMA1222388 | Ningbo Juli Tools Co. Ltd. | 8 Hand | Registered | 2024 |
| MGparty 2161912 · TMA1228022 | an individual | 28 Toys | Registered | 2024 |
| MOZABRICK 2135579 · TMA1225971 · design | TOYSOFT GIFTS TRADING CO. L.L.C | 28 Toys | Registered | 2024 |
| MASBRILL 2121383 · TMA1187535 | SHENZHEN TIANZHE SCIENCE AND TECHNOLOGY CO. LIMITED | 9 Electronics18 Leather | Registered | 2023 |