| MEDISYS 0863717 · TMA517681 | TELUS Health Care Centres Inc. Cliniques TELUS Santé Inc. | 35 Advertising44 Medical | Registered | 1999 |
| MEDASYST 2255962 | Owner not listed | 1 Chemicals7 Machines | Pending | 2023 |
| METASYS 1835610 · TMA1088188 | Tyco Fire & Security GmbH | 9 Electronics35 Advertising37 Construction+4 | Registered | 2020 |
| METASYS 0700402 · TMA417063 | Tyco Fire & Security GmbH | 9 Electronics | Registered | 1993 |
| MEDISYSTEM 1471298 · TMA933321 | 911979 Alberta Ltd. | 9 Electronics16 Paper18 Leather+5 | Registered | 2016 |
| MEDISYSTEM 1366523 · TMA765199 | 911979 Alberta Ltd. | 37 Construction38 Telecommunications42 Science | Registered | 2010 |
| Medcosa 2208480 · TMA1228469 | SellerX Germany GmbH | 10 Medical21 Housewares | Registered | 2024 |
| Medaxis 1626829 · TMA927761 | MÉDAXIS INC. | 35 Advertising36 Finance41 Education+1 | Registered | 2016 |
| MADSHUS 1591924 · TMA860237 | Owner not shown | 25 Clothing | Registered | 2013 |
| MEDICIS 1372150 · TMA851005 | Medicis Pharmaceutical Corporation (a Delaware corporation) | 3 Cosmetics5 Pharmaceuticals41 Education | Registered | 2013 |
| MADSHUS 1273246 · TMA721528 | Owner not shown | 25 Clothing28 Toys | Registered | 2008 |
| MEDICUS 1257435 · TMA669416 | LE GROUPE MÉDICUS INC. | 10 Medical35 Advertising36 Finance+3 | Registered | 2006 |
| MEDEXUS 1071047 · TMA598253 | MEDEXUS INC. | 35 Advertising45 Legal | Registered | 2003 |
| MEDICIS 0847898 · TMA535115 | Medicis Pharmaceutical Corporation | 3 Cosmetics5 Pharmaceuticals | Registered | 2000 |
| MEDISOX 0800536 · TMA478796 · design | Owner not shown | 10 Medical | Registered | 1997 |
| MEDIGAS 0661979 · TMA399112 | PRAXAIR CANADA INC. | 5 Pharmaceuticals10 Medical44 Medical | Registered | 1992 |
| MEDIGAS 0516715 · TMA311932 · design | PRAXAIR CANADA INC. | 5 Pharmaceuticals10 Medical | Registered | 1986 |
| mediSiC 2310564 | MERSEN Deutschland Holding GmbH & Co. KG | 9 Electronics | Pending | 2023 |
| MEDISYSTEMS 1551848 · TMA840228 | NxStage Medical, Inc. | 10 Medical | Registered | 2013 |
| Mathtoxyz 2257664 · TMA1276389 | Kaiping Shidianban Network Technology Co. Ltd | 20 Furniture | Registered | 2024 |
| Mediacous 2220319 · TMA1247025 | Shenzhen Guiyang Network Technology Co. Ltd. | 11 Lighting | Registered | 2024 |
| mDesign 2188754 · TMA1232738 | an individual | 17 Rubber | Registered | 2024 |
| MetaAccess 2135405 · TMA1177940 | OPSWAT, Inc. | 9 Electronics42 Science | Registered | 2023 |
| METACAST 2042745 · TMA1123181 | Metamark (UK) Limited | 17 Rubber | Registered | 2022 |
| MEDCOACH 1983950 · TMA1217843 | ADGA Group Consultants Inc. | 9 Electronics35 Advertising41 Education | Registered | 2024 |