| MASTERBATH 1365592 · TMA779893 | RSI HOME PRODUCTS MANAGEMENT, INC. | 20 Furniture | Registered | 2010 |
| MASTERPAN 1964676 · TMA1178188 | an individual | 21 Housewares | Registered | 2023 |
| MASTERPACK 1855360 · TMA1053200 | an individual | 22 Ropes42 Science | Registered | 2019 |
| MASTERPASS 1615737 · TMA1017425 | Mastercard International Incorporated | 9 Electronics35 Advertising36 Finance+3 | Registered | 2019 |
| 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 |
| MASTERPAN 2252528 | DREAMBIZ Ltd. | 8 Hand | Pending | 2023 |
| MASTERPAK 2208958 | Masterpak Inc. | 6 Metal16 Paper20 Furniture | Pending | 2022 |
| Mastermates 2181339 · TMA1230233 | 1749615 ONTARIO INC. | 10 Medical | Registered | 2024 |
| MASTERPEACE 1190747 · TMA661423 | Garacama Proprietary Limited | 33 Wine | Registered | 2006 |
| MASTERMATES 2181335 · design | 1749615 ONTARIO INC. | 10 Medical | Pending | 2022 |
| Masterplug 2244759 · TMA1263206 | Owner not listed | 28 Toys | Registered | 2024 |
| MasterFit 2069039 · TMA1158318 | Yiwu Zhaoen Sports Goods Co. Ltd. | 28 Toys | Registered | 2022 |
| 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 |
| MASTEREASE 1731205 · TMA1062067 | Construction Research & Technology GmbH | 1 Chemicals | Registered | 2019 |
| MASTERPIX 1723524 · TMA1048196 | CORNING INCORPORATED | 16 Paper40 Treatment42 Science | Registered | 2019 |
| MASTERPLAN 1561662 · TMA910561 | Masterfeeds Inc. | 5 Pharmaceuticals | Registered | 2015 |
| MASTERACK 1557238 · TMA863084 | Masterack Manufacturing and Installation, LLC | 6 Metal12 Vehicles20 Furniture+2 | Registered | 2013 |
| MASTERVAC 1555952 · TMA859801 · design | Canadian Tire Corporation, Limited | 7 Machines | Registered | 2013 |
| MASTERAIR 1553237 · TMA904241 | Construction Research & Technology GmbH | 1 Chemicals | Registered | 2015 |