| ROUGHRIDER 1128888 · TMA586725 | CDN ENERGY AND POWER INTERNATIONAL CORP. | 9 Electronics | Registered | 2003 |
| RUGRATS 1071007 · TMA595811 | VIACOM INTERNATIONAL INC. | 29 Meat30 Coffee | Registered | 2003 |
| RUGRATS 1034989 · TMA574235 | VIACOM INTERNATIONAL INC. | 3 Cosmetics5 Pharmaceuticals10 Medical | Registered | 2003 |
| ROUGHRIDER 0839751 · TMA525007 | Windrow Baling Products Inc. | 17 Rubber22 Ropes | Registered | 2000 |
| RUGRATS 0782792 · TMA510088 | VIACOM INTERNATIONAL INC. | 9 Electronics16 Paper21 Housewares+3 | Registered | 1999 |
| ROUGHRIDER 0763152 · TMA491519 | Canadian Tire Corporation, Limited | 12 Vehicles | Registered | 1998 |
| ROUGHRIDER 0472310 · TMA289631 · design | X BRANDS INC. | 25 Clothing | Registered | 1984 |
| RICARED 2215622 · TMA1233959 | NIHON NOHYAKU CO. LTD. | 5 Pharmaceuticals | Registered | 2024 |
| RISKGUARD 2207694 · TMA1246458 | EXACT SCIENCES CORPORATION, a legal entity | 44 Medical | Registered | 2024 |
| RKRDZ 2157445 · TMA1277335 | ALDYGO | 35 Advertising41 Education42 Science | Registered | 2024 |
| ROSEWARD 2139550 · TMA1127611 | ROSEWARD, INC | 14 Jewellery25 Clothing | Registered | 2022 |
| RaeGuard. 2120704 · TMA1166108 | Plastipack Limited | 17 Rubber22 Ropes | Registered | 2023 |
| RICARDO 2115967 · TMA1247888 | RICARDO MÉDIA INC. | 29 Meat30 Coffee31 Fresh+1 | Registered | 2024 |
| REASSURITY 2111894 · TMA1192719 | REASSURITY INC. | 36 Finance | Registered | 2023 |
| REASSURITY 2111893 · TMA1192718 · design | REASSURITY INC. | 36 Finance | Registered | 2023 |
| Recruitable 2100750 · TMA1177556 | Recruitable Specialist Headhunters Inc. | 35 Advertising | Registered | 2023 |
| RECRUITICS 2056109 · TMA1188162 | Recruitics LLC | 35 Advertising42 Science | Registered | 2023 |
| Rusart 2046010 · TMA1170779 | an individual | 2 Paints16 Paper41 Education | Registered | 2023 |
| RICARD 2037556 · TMA1135788 · design | an individual | 33 Wine | Registered | 2022 |
| RICARD 2037555 · TMA1135787 · design | an individual | 33 Wine | Registered | 2022 |
| RECRUITERSHARE 2005047 · TMA1260624 | HireMojo, Inc. | 42 Science | Registered | 2024 |
| REGART 1981659 · TMA1111252 | REGART inc. | 25 Clothing | Registered | 2021 |
| ROCKCRETE 1971653 · TMA1137119 | Terra CO2 Technologies | 1 Chemicals | Registered | 2022 |
| REGRETA 1952846 · TMA1211495 · design | Greta YYC Limited Partnership | 3 Cosmetics9 Electronics10 Medical+12 | Registered | 2023 |
| RAZERTRIM 1933976 · TMA1122907 | Razertip Industries Ltd. | 7 Machines10 Medical | Registered | 2022 |