| RetroBloc 2184872 | an individual | 36 Finance37 Construction42 Science | Pending | 2021 |
| RETROPLATE 1288094 · TMA678280 | Curecrete Chemical Company | 1 Chemicals37 Construction | Registered | 2006 |
| RETROBITES 0916716 | Canadian Broadcasting Corporation / Société Radio-Canada | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2005 |
| RETROFRACTOR 2266975 · TMA1209089 | Owner not listed | 16 Paper28 Toys | Registered | 2023 |
| RETROFLAG 1900114 · TMA1068885 · design | CHANGZHI ( SHENZHEN ) TECHNOLOGY CO. LTD. | 28 Toys | Registered | 2020 |
| RETROPHIN 1742399 · TMA1032297 | Retrophin, Inc. | 5 Pharmaceuticals | Registered | 2019 |
| RETROUVÉ 1629877 · TMA1036496 | an individual | 3 Cosmetics | Registered | 2019 |
| RETROFRET 1546106 · TMA850234 | an individual | 35 Advertising37 Construction | Registered | 2013 |
| RETROFIT 1454833 · TMA888322 | Retrofit Bodyworks Inc. | 25 Clothing35 Advertising41 Education+1 | Registered | 2014 |
| RETROFLEX 1351294 · TMA840869 | Edwards Lifesciences Corporation | 10 Medical | Registered | 2013 |
| RETROFIRE 1248111 · TMA653963 | Miles Industries Ltd. | 11 Lighting | Registered | 2005 |
| RETROPORE 1089986 · TMA573714 | an individual | 9 Electronics11 Lighting | Registered | 2003 |
| RETROVIR 0547620 · TMA332234 | ViiV Healthcare UK Limited | 5 Pharmaceuticals | Registered | 1987 |
| RETROFEST 0922653 | The Corporation of the Municipality of Chatham-Kent | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2014 |
| RETROBRIGHT 2167386 · TMA1203181 | Holley Performance Products, Inc. | 9 Electronics11 Lighting | Registered | 2023 |
| RETROPLANET 1233980 · TMA700283 | MARTIN CAPITAL INTERNATIONAL INC. | 16 Paper21 Housewares25 Clothing+2 | Registered | 2007 |
| ROADTRIPPER 2247306 · TMA1267175 | Roadtripper Graphics Inc. | 16 Paper25 Clothing | Registered | 2024 |
| RETROFIT3D 2099635 · TMA1222028 · design | IMI Critical Engineering LLC | 7 Machines9 Electronics40 Treatment | Registered | 2024 |
| RedRaven 2034907 · TMA1161168 | FLOWSERVE MANAGEMENT COMPANY | 9 Electronics37 Construction | Registered | 2023 |
| ROAHTRIP 2006650 · TMA1142565 · design | Jiangxi Senmu Technology Co.Ltd. | 12 Vehicles | Registered | 2022 |
| READY2ROBOT 1907625 · TMA1097220 | MGA Entertainment Inc. | 28 Toys | Registered | 2021 |
| RETRIEVER 1856833 · TMA1060068 | Mahindra USA, Inc. | 12 Vehicles | Registered | 2019 |
| RETRIEVIUM 1779011 · TMA1019919 · design | Retrievium Inc. | 9 Electronics | Registered | 2019 |
| RETRIEVIUM 1779010 · TMA1019922 | Retrievium Inc. | 9 Electronics | Registered | 2019 |
| REDIWRAP 1772311 · TMA983473 | Spicers Canada ULC | 8 Hand | Registered | 2017 |