| MEDIAPLANET 1448727 · TMA780682 | an individual | 16 Paper41 Education | Registered | 2010 |
| MEDIBULK 2086118 · TMA1168728 · design | Western Extraction Ltd. | 5 Pharmaceuticals34 Tobacco | Registered | 2023 |
| MediaVelox 1839845 · TMA1073088 | appero GmbH | 9 Electronics42 Science | Registered | 2020 |
| MEDIPLEX 1588891 · TMA875625 | CLINIQUE MÉDICALE MEDIPLEX INC. | 44 Medical | Registered | 2014 |
| MEDIAVALET 1514045 · TMA822256 | MediaValet Inc. | 42 Science | Registered | 2012 |
| MEDIPILL 1459068 · TMA781258 · design | Les Logiciels Musca inc. personne morale | 9 Electronics | Registered | 2010 |
| MEDIPILL 1449555 · TMA781261 | Les Logiciels Musca inc. | 9 Electronics | Registered | 2010 |
| MEDVAULT 1383368 · TMA786296 | KNOX ASSOCIATES, INC. dba The Knox Company | 6 Metal | Registered | 2011 |
| MEDIPLAST 1328916 · TMA722370 | PRETIUM CANADA PACKAGING ULC | 21 Housewares40 Treatment | Registered | 2008 |
| MÉDIAFILM 1327300 · TMA704546 | ORGANISATION COMMUNICATIONS ET SOCIÉTÉ OCS INC. | 38 Telecommunications41 Education | Registered | 2008 |
| MEDIABALL 1260990 · TMA824883 | Grass Valley USA, LLC | 9 Electronics16 Paper38 Telecommunications+2 | Registered | 2012 |
| MEDIPLAN 0896248 · TMA524881 | BANQUE NATIONALE DU CANADA, UNE CORPORATION LÉGALEMENT CONSTITUÉE | 35 Advertising36 Finance | Registered | 2000 |
| MEDIBILE 0281893 · TMA138844 | Wyeth LLC a Delaware limited liability company | 5 Pharmaceuticals | Registered | 1965 |
| MEDIPLAST 2301934 · design | Owner not listed | 5 Pharmaceuticals | Pending | 2023 |
| MediPlas 2291781 | Owner not listed | 9 Electronics10 Medical11 Lighting | Pending | 2023 |
| MEDIEVAL 2004952 · TMA1144406 | Lincoln Global, Inc. | 9 Electronics | Registered | 2022 |
| MEDIFLAX 1850462 · TMA1013929 | Prairie Tide Diversified Inc. | 5 Pharmaceuticals | Registered | 2019 |
| MEDIFLEX 1843074 · TMA1113317 | Beneva Inc. | 36 Finance42 Science | Registered | 2021 |
| METAPILL 1808331 · TMA994833 | an individual | 5 Pharmaceuticals | Registered | 2018 |
| METAPLEX 1797883 · TMA1049933 | Schlumberger Canada Limited | 6 Metal7 Machines17 Rubber+2 | Registered | 2019 |
| MODAPLEX 1716057 · TMA990325 | BIOTYPE GmbH | 1 Chemicals5 Pharmaceuticals9 Electronics+1 | Registered | 2018 |
| MEDPALZ 1513160 · TMA820539 | TELUS Corporation | 41 Education44 Medical | Registered | 2012 |
| METAPLACE 1439698 · TMA830357 | PLAYDOM, INC. a Delaware corporation | 9 Electronics | Registered | 2012 |
| MADBALLS 1306608 · TMA743174 | THOSE CHARACTERS FROM CLEVELAND, LLC | 25 Clothing28 Toys | Registered | 2009 |
| MEDIFLOR 1113734 · TMA624381 | P&G Health Germany GmbH | 3 Cosmetics5 Pharmaceuticals30 Coffee | Registered | 2004 |