| OSMOSTIM 2258212 · TMA1277759 | Danisco US Inc. | 1 Chemicals | Registered | 2024 |
| OCEANICE 2236751 · TMA1255409 | an individual | 19 Building | Registered | 2024 |
| OCEANS 5 2222895 · TMA1239056 | an individual | 36 Finance | Registered | 2024 |
| OCEANS5 2222891 · TMA1239055 · design | an individual | 36 Finance | Registered | 2024 |
| OCEANSIDE85 2221774 · TMA1249830 | an individual | 9 Electronics41 Education | Registered | 2024 |
| OCEANSKY 2192819 · TMA1266950 | an individual | 39 Transport | Registered | 2024 |
| Oismys 2139447 · TMA1199095 | Wuhan Enzhaoxi Electronic Commerce Co. Ltd. | 25 Clothing | Registered | 2023 |
| OSMK 2128479 · TMA1193681 · design | GLOBAL JELLYFISH STEM CELL BIOTECHNOLOGY (CANADA) CO. LIMITED | 3 Cosmetics5 Pharmaceuticals35 Advertising | Registered | 2023 |
| OCEANSAFE 2108552 · TMA1218090 · design | an individual | 23 Yarns24 Textiles25 Clothing+1 | Registered | 2024 |
| OSINMAX 2103730 · TMA1176521 | an individual | 9 Electronics11 Lighting | Registered | 2023 |
| Okuyonic 2077001 · TMA1155415 | SHENZHEN CHUJIN NETWORK TECHNOLOGY CO.LTD | 8 Hand | Registered | 2022 |
| OSENSIA 2059108 · TMA1131242 | an individual | 3 Cosmetics11 Lighting21 Housewares | Registered | 2022 |
| OSONS 2055458 · TMA1204751 · design | an individual | 35 Advertising | Registered | 2023 |
| OSMOSE 360 2014896 · TMA1273547 | Osmose Utilities Services, Inc. | 42 Science | Registered | 2024 |
| OCEANS 12 2005433 · TMA1131076 | New Sensor Corporation | 9 Electronics | Registered | 2022 |
| OCEANEOS 2000038 · TMA1200995 | Lucent Biosciences, Inc. | 1 Chemicals42 Science | Registered | 2023 |
| OCEANOGRAPHER 1992141 · TMA1102582 | an individual | 14 Jewellery | Registered | 2021 |
| OSCONIQ 1974582 · TMA1247565 | OSRAM GmbH | 9 Electronics11 Lighting | Registered | 2024 |
| OCEANIX 1968431 · TMA1285137 | NOVATEL INC. | 9 Electronics37 Construction39 Transport+1 | Registered | 2025 |
| OCEANIX 1930148 · TMA1129494 | Lonza Ltd. | 1 Chemicals5 Pharmaceuticals | Registered | 2022 |
| OCEANKIND 1929426 · TMA1120554 | OceanKind LLC | 18 Leather21 Housewares25 Clothing+4 | Registered | 2022 |
| OSMOSE 1923445 · TMA1144997 | Osmose Utilities Services, Inc. | 6 Metal19 Building35 Advertising+3 | Registered | 2022 |
| OCEANSIDE 1921519 · TMA1118411 | ENERGIZER GROUP LIMITED | 3 Cosmetics5 Pharmaceuticals | Registered | 2022 |
| OCEANX 1885081 · TMA1090645 | Alucia Productions, LLC | 35 Advertising36 Finance41 Education+2 | Registered | 2020 |
| OXIMAG 1853825 · TMA1086422 · design | NikoMag, Joint Stock Company | 1 Chemicals5 Pharmaceuticals | Registered | 2020 |