| OREUS 2257481 · design | OREUS | 7 Machines9 Electronics10 Medical | Pending | 2023 |
| OREUS 2257480 | Owner not listed | 7 Machines9 Electronics10 Medical | Pending | 2023 |
| OROS 2151367 · TMA1185606 | an individual | 28 Toys | Registered | 2023 |
| Oroys 2122678 · TMA1201407 | OROYS CLOTHING COMPANY INC. | 25 Clothing35 Advertising | Registered | 2023 |
| ORÈS 2052158 · TMA1220239 · design | ORES | 35 Advertising41 Education | Registered | 2024 |
| ORUS 1986929 · TMA1098637 | CAF, Inc | 3 Cosmetics | Registered | 2021 |
| OROKS 1834787 · TMA1053364 | Owner not shown | 9 Electronics18 Leather25 Clothing+1 | Registered | 2019 |
| ORIUS 1790972 · TMA1028743 | ADAMA MAKHTESHIM LTD. | 5 Pharmaceuticals | Registered | 2019 |
| OROS 1658850 · TMA937069 | Distribution d'Epicerie C.T.S. Inc. | 29 Meat30 Coffee | Registered | 2016 |
| OREIS 0836997 · TMA524344 | OPERATION RESPOND INSTITUTE, INC. A MARYLAND CORPORATION | 9 Electronics16 Paper36 Finance+2 | Registered | 2000 |
| OROS 0621351 · TMA362295 | ALZA CORPORATION | 10 Medical | Registered | 1989 |
| ORUS 2349512 | Trudell Medical International Inc. | 10 Medical | Pending | 2024 |
| ORUS 2349511 · design | Trudell Medical International Inc. | 10 Medical | Pending | 2024 |
| OROCHI 2243293 · TMA1261777 | an individual | 43 Restaurants | Registered | 2024 |
| ORSO 2218801 · TMA1246838 | Guangzhou Tri-Ace Tire Co. Limited | 12 Vehicles | Registered | 2024 |
| OURCO 2199832 · TMA1238448 | Foshan Aoerke Technology Co., Ltd. | 20 Furniture | Registered | 2024 |
| ORSJA 2150363 · TMA1205274 | Fuzhou Black Five Trading Co. Ltd. | 21 Housewares | Registered | 2023 |
| ORSKEY 2132890 · TMA1194841 | Shenzhen Ouruisi International Trade Co. Ltd. | 9 Electronics | Registered | 2023 |
| ORAKI 2131579 · TMA1224018 | LES VÊTEMENTS ORAKI INC. | 25 Clothing35 Advertising | Registered | 2024 |
| ORIC 2108007 · TMA1187463 · design | ORIC Pharmaceuticals, Inc. | 5 Pharmaceuticals | Registered | 2023 |
| OREX 2088775 · TMA1160454 | an individual | 7 Machines40 Treatment | Registered | 2023 |
| Orisha 2073132 · TMA1168421 | Automatisation Orisha inc. | 9 Electronics | Registered | 2023 |
| OHREX 2069013 · TMA1158306 | Shenzhen WEIKEZHISHANG Technology Co.Ltd. | 9 Electronics | Registered | 2022 |
| OREC 2067966 · TMA1198591 · design | OREC CO. LTD. | 7 Machines | Registered | 2023 |
| ORIGO 2056727 · TMA1157265 · design | E&J Investments LLC | 25 Clothing | Registered | 2022 |