| MEDISENSE 1110112 · TMA589456 | Owner not shown | 5 Pharmaceuticals10 Medical16 Paper | Registered | 2003 |
| MEDISENSE 1005449 · TMA558916 · design | an individual | 1 Chemicals5 Pharmaceuticals9 Electronics+2 | Registered | 2002 |
| Medicinc 2049059 | 9191-6346 Québec Inc. | 3 Cosmetics9 Electronics10 Medical+2 | Pending | 2020 |
| MEDIAOCEAN 2079538 · TMA1284090 · design | Mediaocean LLC | 42 Science | Registered | 2025 |
| MEDIAKIND 1918583 · TMA1139096 · design | MK Systems USA Inc. | 9 Electronics37 Construction38 Telecommunications+1 | Registered | 2022 |
| MEDIAKIND 1918555 · TMA1139095 | MK Systems USA Inc. | 9 Electronics37 Construction38 Telecommunications+1 | Registered | 2022 |
| MEDIGENE 1913574 · TMA1254413 · design | Medigene Immunotherapies GmbH | 5 Pharmaceuticals42 Science44 Medical | Registered | 2024 |
| MEDISEEN 1860305 · TMA1019406 | MediSeen Inc. | 9 Electronics | Registered | 2019 |
| MedScint 1812227 · TMA1049944 | MEDSCINT INC. | 10 Medical | Registered | 2019 |
| METASENSE 1781447 · TMA985301 | Advanced Chemistry Development Inc. | 9 Electronics35 Advertising42 Science | Registered | 2017 |
| MEDIASONIC 1589487 · TMA932917 | Major League Global Enterprise Limited | 35 Advertising | Registered | 2016 |
| MEDIAOCEAN 1584793 · TMA890843 | Mediaocean LLC | 42 Science | Registered | 2014 |
| MEDIASONIC 1492292 · TMA813595 · design | Major League Global Enterprise Limited | 9 Electronics35 Advertising | Registered | 2011 |
| MEDIACONNEX 1441847 · TMA779739 | GYPCMARQUETTE GROUP ULC / GROUPE GYPCMARQUETTE ULC | 35 Advertising | Registered | 2010 |
| MEDIGENE 1344896 · TMA770784 | Medigene Immunotherapies GmbH | 1 Chemicals5 Pharmaceuticals10 Medical | Registered | 2010 |
| MITOSCIENCES 1309927 · TMA730875 | MitoScience LLC | 5 Pharmaceuticals42 Science | Registered | 2008 |
| MEDICENTRE 0491647 · TMA285252 | Medicentres Canada Inc. | 44 Medical | Registered | 1983 |
| Medisenol 2337027 | Hydrx Farms Ltd. | – | Pending | 2024 |
| MediSens 2319443 | Owner not shown | 5 Pharmaceuticals9 Electronics10 Medical | Pending | 2023 |
| MEDIAGENIX 2156245 | an individual | 9 Electronics42 Science | Pending | 2021 |
| MetCuento 2259101 · TMA1277844 | Owner not shown | 25 Clothing | Registered | 2024 |
| MOODSWING 2223072 · TMA1249887 | 14445198 CANADA INC. | 25 Clothing28 Toys | Registered | 2024 |
| MOTOCOMPACTO 2220678 · TMA1259602 | Honda Motor Co. Ltd. | 12 Vehicles | Registered | 2024 |
| MATCH2ME 2158135 · TMA1252250 | Trinny London Limited | 3 Cosmetics8 Hand10 Medical+2 | Registered | 2024 |
| Metcon 2136854 · TMA1177973 | Shanghai Xingtong sports culture development co. LTD | 28 Toys | Registered | 2023 |