| MASTERPATH 2282407 | MasterPath, Inc. | 9 Electronics16 Paper41 Education+1 | Pending | 2023 |
| Mastermates 2181339 · TMA1230233 | 1749615 ONTARIO INC. | 10 Medical | Registered | 2024 |
| MASTERBRACE 1553243 · TMA905167 | an individual | 1 Chemicals6 Metal17 Rubber+2 | Registered | 2015 |
| MASTERMATES 2181335 · design | 1749615 ONTARIO INC. | 10 Medical | Pending | 2022 |
| 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 |
| MASTERPAN 1964676 · TMA1178188 | an individual | 21 Housewares | Registered | 2023 |
| MASTERHALL 1902050 · TMA1130782 | 2264918 ONTARIO LIMITED | 9 Electronics14 Jewellery16 Paper+4 | Registered | 2022 |
| MASTERPACK 1855360 · TMA1053200 | an individual | 22 Ropes42 Science | Registered | 2019 |
| 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 |
| MASTERPASS 1615737 · TMA1017425 | Mastercard International Incorporated | 9 Electronics35 Advertising36 Finance+3 | Registered | 2019 |
| 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 |
| MASTERCAST 1553234 · TMA904238 | Construction Research & Technology GmbH | 1 Chemicals | Registered | 2015 |
| MASTERSET 1553231 · TMA904244 | Construction Research & Technology GmbH | 1 Chemicals | Registered | 2015 |
| MASTERCARD 1489905 · TMA808955 · design | Mastercard International Incorporated | 6 Metal9 Electronics16 Paper+7 | Registered | 2011 |
| MASTERCARD 1489904 · TMA808956 · design | Mastercard International Incorporated | 6 Metal9 Electronics16 Paper+7 | Registered | 2011 |
| MASTERCARD 1489901 · TMA811033 | Mastercard International Incorporated | 6 Metal9 Electronics16 Paper+7 | Registered | 2011 |
| MASTERCALF 1481975 · TMA807533 | Masterfeeds Inc. | 5 Pharmaceuticals31 Fresh | Registered | 2011 |
| MASTERMADE 1477074 · TMA855039 | IW Apparel, LLC | 13 Firearms18 Leather25 Clothing+1 | Registered | 2013 |
| MASTERAY 1383630 · TMA750455 · design | an individual | 9 Electronics28 Toys35 Advertising+1 | Registered | 2009 |