| MASTERCLASS 1932854 · TMA1149697 | an individual | 9 Electronics11 Lighting | Registered | 2022 |
| MASTERCLASS 1433315 · TMA831455 | H&H Asia Ltd. | 8 Hand9 Electronics21 Housewares | Registered | 2012 |
| MASTERPAN 1964676 · TMA1178188 | an individual | 21 Housewares | Registered | 2023 |
| MASTERPACK 1855360 · TMA1053200 | an individual | 22 Ropes42 Science | Registered | 2019 |
| MASTEREASE 1731205 · TMA1062067 | Construction Research & Technology GmbH | 1 Chemicals | Registered | 2019 |
| MASTERCAST 1553234 · TMA904238 | Construction Research & Technology GmbH | 1 Chemicals | Registered | 2015 |
| MASTERPAR 1003083 · TMA557381 | an individual | 11 Lighting | Registered | 2002 |
| MASTERPAY 0714743 · TMA436168 | Mastercard International Incorporated | 36 Finance | Registered | 1994 |
| MASTERPACT 0554482 · TMA352511 | Owner not shown | 9 Electronics11 Lighting | Registered | 1989 |
| MASTERPATH 2282407 | MasterPath, Inc. | 9 Electronics16 Paper41 Education+1 | Pending | 2023 |
| MASTERPAN 2252528 | DREAMBIZ Ltd. | 8 Hand | Pending | 2023 |
| MASTERPAK 2208958 | Masterpak Inc. | 6 Metal16 Paper20 Furniture | Pending | 2022 |
| MASTERCAST 2119820 | AMERICAN BATH GROUP, LLC | 11 Lighting19 Building | Pending | 2021 |
| Mastermates 2181339 · TMA1230233 | 1749615 ONTARIO INC. | 10 Medical | Registered | 2024 |
| MASTERPEACE 1190747 · TMA661423 | Garacama Proprietary Limited | 33 Wine | Registered | 2006 |
| MasterlySOS 2306796 | Masterly Inc. | 9 Electronics14 Jewellery16 Paper | Pending | 2024 |
| MASTERMATES 2181335 · design | 1749615 ONTARIO INC. | 10 Medical | Pending | 2022 |
| Masterplug 2244759 · TMA1263206 | Owner not listed | 28 Toys | Registered | 2024 |
| MASTERLISE 2199165 · TMA1222519 · design | Kabushiki Kaisha Bandai Spirits(Bandai Spirits Co. Ltd.) | 28 Toys | Registered | 2024 |
| MASTERVAC 1992813 · TMA1152674 · design | Canadian Tire Corporation, Limited | 7 Machines | Registered | 2022 |
| MASTERHALL 1902050 · TMA1130782 | 2264918 ONTARIO LIMITED | 9 Electronics14 Jewellery16 Paper+4 | Registered | 2022 |
| MASTERCARD 1812853 · TMA1094980 · design | Mastercard International Incorporated | 9 Electronics16 Paper35 Advertising+4 | Registered | 2021 |
| MASTERCARD 1812852 · TMA1094233 · design | Mastercard International Incorporated | 9 Electronics16 Paper35 Advertising+4 | Registered | 2021 |
| MASTERVAC 1771091 · TMA1030553 | GPCP IP Holdings LLC | 16 Paper | Registered | 2019 |
| MASTERPIX 1723524 · TMA1048196 | CORNING INCORPORATED | 16 Paper40 Treatment42 Science | Registered | 2019 |