| OEIS 2074096 · TMA1162463 · design | ONTARIO EAGLEZ INVESTIGATIONS AND SECURITY SERVICES CORP. | 6 Metal45 Legal | Registered | 2023 |
| OWG 2064682 · TMA1205817 · design | Les investissements Nolinor inc. | 39 Transport | Registered | 2023 |
| OWG 2005557 · TMA1142561 | Les investissements Nolinor inc. | 39 Transport | Registered | 2022 |
| OIS 1629862 · TMA961465 · design | ROBERT BOSCH GMBH a German company | 3 Cosmetics7 Machines | Registered | 2017 |
| OIS 1512711 · TMA888285 · design | ROBERT BOSCH GMBH a German company | 3 Cosmetics7 Machines8 Hand | Registered | 2014 |
| OIS 1512062 · TMA888287 | ROBERT BOSCH GMBH a German company | 3 Cosmetics7 Machines8 Hand | Registered | 2014 |
| OWS 1441114 · TMA788647 | Global Orthopaedic Technology Pty Limited | 9 Electronics | Registered | 2011 |
| OGS 1299857 · TMA698191 | an individual | 36 Finance | Registered | 2007 |
| OGS 0633133 · TMA379985 · design | M.E. J.J. R.D. THIEBAUD INC. | 35 Advertising37 Construction39 Transport+1 | Registered | 1991 |
| OIIOS 2363949 | Emmo Inc. a legal entity | 6 Metal9 Electronics11 Lighting+6 | Pending | 2024 |
| OIS 2362930 | OPGI Management GP Inc./Gestion OPGI GP Inc. as general partner for OPGI Management Limited Partnership | 35 Advertising36 Finance37 Construction | Pending | 2024 |
| OGS 2324673 · design | OGS MOTO Limited | 9 Electronics25 Clothing28 Toys | Pending | 2024 |
| OWIC 2315552 | OWIC TECHNOLOGIES, INC. | 9 Electronics | Pending | 2024 |
| ohyeahus 2264292 · TMA1283374 | an individual | 5 Pharmaceuticals | Registered | 2025 |
| OOSSXX 2258072 · TMA1277735 · design | Shenzhenshi Xiankailike Technology Co. Ltd | 9 Electronics | Registered | 2024 |
| OKK 2256870 · TMA1276298 · design | OKK INTERNATIONAL (HONG KONG) CO. LIMITED | 34 Tobacco | Registered | 2024 |
| OKG 2254704 · TMA1273110 | Shanghai NVSMART Technology Co. Ltd. | 6 Metal9 Electronics17 Rubber | Registered | 2024 |
| OK 2253930 · TMA1273003 · design | Astral IP Enterprise Ltd. | 9 Electronics | Registered | 2024 |
| OSQ 2253155 · TMA1270254 | Owner not listed | 11 Lighting | Registered | 2024 |
| OHJA 2248120 · TMA1253153 · design | an individual | 34 Tobacco | Registered | 2024 |
| OHJA 2248116 · TMA1253152 | an individual | 34 Tobacco | Registered | 2024 |
| OQQ 2246999 · TMA1267154 | Hangzhou Tabo E-commerce Co. Ltd | 25 Clothing | Registered | 2024 |
| OiQi 2244543 · TMA1264303 | Owner not listed | 9 Electronics | Registered | 2024 |
| OSEE 2239668 · TMA1259966 · design | Osee Technology Co. Ltd. | 9 Electronics | Registered | 2024 |
| OQO 2217712 · TMA1245525 | Ghosia Brands Inc. | 9 Electronics | Registered | 2024 |