| OAKLEY 2087045 · TMA1259214 | OAKLEY, INC. | 9 Electronics10 Medical | Registered | 2024 |
| OAKLEY 1464607 · TMA856542 · design | OAKLEY, INC. | 9 Electronics14 Jewellery18 Leather+1 | Registered | 2013 |
| OAKLEY 0760749 · TMA512668 · design | OAKLEY, INC. (A WASHINGTON CORPORATION) | 9 Electronics16 Paper18 Leather+1 | Registered | 1999 |
| OAKLEY 0611705 · TMA397188 · design | OAKLEY, INC. (A WASHINGTON CORPORATION) | 9 Electronics12 Vehicles18 Leather+2 | Registered | 1992 |
| OAKLEY 0488434 · TMA290235 | OAKLEY, INC. (A WASHINGTON CORPORATION) | 9 Electronics12 Vehicles25 Clothing | Registered | 1984 |
| OAKLEY 2241376 | Oakley Capital Limited | 35 Advertising36 Finance | Pending | 2022 |
| OKLA 2251459 · TMA1270123 · design | Owner not listed | 12 Vehicles | Registered | 2024 |
| OOKLA 1941927 · TMA1137989 | Ookla, LLC | 9 Electronics38 Telecommunications42 Science | Registered | 2022 |
| OCLU 1975629 · design | OCLU LIMITED | 9 Electronics35 Advertising41 Education | Pending | 2019 |
| Osailou 2147503 · TMA1204120 | Shenzhen Yunlaijun Technology Co. , Ltd. | 25 Clothing | Registered | 2023 |
| Ozuly 2243083 · TMA1263027 | Owner not listed | 9 Electronics | Registered | 2024 |
| OCULO 2238849 · TMA1254222 | Effcon Laboratories, Inc. | 5 Pharmaceuticals | Registered | 2024 |
| OUGELEE 2233505 · TMA1255273 | an individual | 11 Lighting | Registered | 2024 |
| Ousaliyea 2204044 · TMA1240037 | Guangzhou Ouyes Trading Co., Ltd. | 16 Paper | Registered | 2024 |
| OGLO 2194646 · TMA1235154 | 2301114 Alberta Ltd. | 9 Electronics11 Lighting | Registered | 2024 |
| Ousaliyea 2177203 · TMA1230147 | Guangzhou Ouyesi Trading Co. Ltd. | 9 Electronics | Registered | 2024 |
| OUXUL 2172578 · TMA1223136 | an individual | 9 Electronics | Registered | 2024 |
| OGL 2165861 · TMA1213390 · design | Guangzhou Dongchen Zhizao Supply Chain Co. LTD. | 25 Clothing | Registered | 2023 |
| ouxile 2142174 · TMA1200357 | Hangzhou Chucheng Electronic Commerce Co. Ltd. | 25 Clothing | Registered | 2023 |
| OKOLO 2091041 · TMA1149375 | an individual | 43 Restaurants | Registered | 2022 |
| OSCAL 2075366 · TMA1162551 · design | Shenzhen DOKE Electronic Co. Ltd. | 9 Electronics | Registered | 2023 |
| OCUELE 2072397 · TMA1184818 | A Healthy Path Pty, Ltd | 9 Electronics | Registered | 2023 |
| oxiuly 2055212 · TMA1169730 | Dong guan shi hai zhi xin dian zi shang wu co.,ltd | 25 Clothing | Registered | 2023 |
| OXWELL 2049718 · TMA1166745 | Oxwell Group Inc. | 5 Pharmaceuticals | Registered | 2023 |
| OXILIA 2047094 · TMA1283895 · design | OXILIA INC. | 35 Advertising | Registered | 2025 |