| OneBe 1627187 · TMA919618 | OneBe, Inc. | 9 Electronics | Registered | 2015 |
| OneHub 2276867 | ONEHUB INC. | 35 Advertising | Pending | 2023 |
| ONEVIEW 1755124 · TMA1025043 · design | NUMERIX LLC | 9 Electronics36 Finance42 Science | Registered | 2019 |
| ONEVIEW 1649502 · TMA907644 | Hewlett Packard Enterprise Development LP | 9 Electronics | Registered | 2015 |
| OneView 1529642 · TMA842956 | Rolta Bi & Big Data Analytics Private Limited | 42 Science | Registered | 2013 |
| ONEVIEW 2130453 | O'Neil Digital Solutions, LLC (a California limited liability company) | 42 Science | Pending | 2021 |
| ONEVIEW 2130450 · design | O'Neil Digital Solutions, LLC (a California limited liability company) | 42 Science | Pending | 2021 |
| ONEVIEW 2092278 | iSeatz, Inc. | 9 Electronics42 Science | Pending | 2021 |
| OMP 2276882 · TMA1279625 | an individual | 14 Jewellery | Registered | 2024 |
| OMNIHUB 2272140 · TMA1258534 · design | Tineco Intelligent Technology Co. Ltd. | 7 Machines | Registered | 2024 |
| OMBU 2238521 · TMA1255417 | Branded AcquiCo No 1, LLC | 18 Leather21 Housewares28 Toys | Registered | 2024 |
| OMPAA 2227785 · TMA1280914 | Changshu Ruihe Household Technology Co. Ltd. | 27 Carpets | Registered | 2025 |
| OOMPH 2222704 · TMA1241847 | Coop Home Goods LLC | 20 Furniture22 Ropes | Registered | 2024 |
| Omba 2159639 · TMA1211052 | an individual | 20 Furniture | Registered | 2023 |
| OMOUBOI 2148774 · TMA1265310 · design | Shenzhen Shengye Cultural Goods Co., Ltd. | 9 Electronics18 Leather | Registered | 2024 |
| ONVY 2147653 · TMA1278703 · design | bioathletiQ GmbH | 5 Pharmaceuticals9 Electronics35 Advertising+3 | Registered | 2024 |
| ONB 2139696 · TMA1221314 · design | ZhongMi (Xiamen) Technology Co., Ltd. | 7 Machines8 Hand10 Medical+4 | Registered | 2024 |
| ONEUP 2133837 · TMA1226874 · design | EcoFlow Inc. | 9 Electronics | Registered | 2024 |
| ONBE 2132221 · TMA1247914 · design | Onbe, Inc. | 36 Finance | Registered | 2024 |
| ONMUV 2113032 · TMA1160521 | Neuroderm LTD | 10 Medical | Registered | 2023 |
| ONBE 2106797 · TMA1247875 | Onbe, Inc. | 36 Finance | Registered | 2024 |
| ONAVIA 2094161 · TMA1185062 | COMIX INTSERV TECH LIMITED | 20 Furniture | Registered | 2023 |
| OMVE 2057461 · TMA1244892 | an individual | 7 Machines9 Electronics11 Lighting+1 | Registered | 2024 |
| OMVOH 2023304 · TMA1246040 | ELI LILLY AND COMPANY | 5 Pharmaceuticals | Registered | 2024 |
| OMP 1999533 · TMA1118570 · design | an individual | 9 Electronics12 Vehicles25 Clothing | Registered | 2022 |