| OZERO 2212411 · TMA1183272 · design | Shenzhen Hongfuya Trade Co. Ltd | 9 Electronics21 Housewares25 Clothing+1 | Registered | 2023 |
| OZERO 1938481 · TMA1157750 · design | Shenzhen Hongfuya Trade Co. Ltd | 21 Housewares25 Clothing28 Toys | Registered | 2022 |
| OZERY 1792111 · TMA985173 | Ozery's Pita Break Inc. | 30 Coffee35 Advertising40 Treatment | Registered | 2017 |
| Osoeri 2204955 · TMA1236473 | Shenzhen Hailingchuan Technology Co. Ltd. | 12 Vehicles | Registered | 2024 |
| Osoeri 2204946 · TMA1236472 | Shenzhen Hailingchuan Technology Co. Ltd. | 9 Electronics | Registered | 2024 |
| Osoeri 2194868 · TMA1236086 | Shenzhen Hailingchuan Technology Co. Ltd. | 11 Lighting | Registered | 2024 |
| OZARIA 2005262 · TMA1134823 | CodeCombat Inc. | 9 Electronics41 Education | Registered | 2022 |
| OZARIO 1218094 · TMA655951 | Vins Arterra Canada, division Québec, Inc. | 33 Wine | Registered | 2006 |
| OGORI 2227036 · TMA1251380 | Shen Zhen Ai Pin Gou Network Technology Limited Company | 8 Hand | Registered | 2024 |
| OZORA 1813315 · TMA1061719 | Linde GmbH | 11 Lighting | Registered | 2019 |
| OCERA 1793554 · TMA1038886 | Ocera Therapeutics, Inc. | 5 Pharmaceuticals | Registered | 2019 |
| OCERA 1333425 · TMA748181 | Ocera Therapeutics, Inc. | 5 Pharmaceuticals | Registered | 2009 |
| OXERA 2258463 · design | Owner not listed | 9 Electronics16 Paper35 Advertising+4 | Pending | 2022 |
| OCRI 2249631 | Owner not shown | 41 Education45 Legal | Pending | 2023 |
| OXERA 2231894 | Oxera Consulting LLP | 9 Electronics35 Advertising36 Finance+2 | Pending | 2022 |
| OEZER 2225350 · design | Guangdong Kelong Oezer Technology Co., Ltd. | 6 Metal | Pending | 2022 |
| OXERA 2195439 | Oxera Consulting LLP | 16 Paper35 Advertising42 Science+1 | Pending | 2022 |
| OCCER 2261784 · TMA1281290 | Guangzhou Ruiyi Information Technology Co. Ltd. | 9 Electronics | Registered | 2025 |
| Ouker 2187804 · TMA1232630 | an individual | 28 Toys | Registered | 2024 |
| OGROW 2142882 · TMA1202817 | KSH BRANDS LLC | 6 Metal | Registered | 2023 |
| OUGARE 2102353 · TMA1188401 | an individual | 25 Clothing | Registered | 2023 |
| OSR 2083770 · TMA1212901 · design | ORIND SPECIAL REFRACTORIES PVT. LTD. | 19 Building | Registered | 2023 |
| OJIRRU 2068974 · TMA1164650 | an individual | 9 Electronics18 Leather25 Clothing | Registered | 2023 |
| OSIRE 1952808 · TMA1222608 | OSRAM GmbH | 9 Electronics | Registered | 2024 |
| OGIER 1899727 · TMA1188952 · design | Owner not shown | 33 Wine | Registered | 2023 |