| onewind 2074028 · TMA1161423 | an individual | 22 Ropes | Registered | 2023 |
| OMNImet 2016492 · TMA1270615 | DNA Genotek Inc. | 9 Electronics10 Medical | Registered | 2024 |
| ONEMT 1889396 · TMA1084340 · design | ONEMT Group Holding Limited | 9 Electronics35 Advertising41 Education+1 | Registered | 2020 |
| ONEMT 1889285 · TMA1084345 | ONEMT Group Holding Limited | 42 Science | Registered | 2020 |
| ONEMATA 1888576 · TMA1086977 | Onemata Corporation | 42 Science | Registered | 2020 |
| ONEMT 1858728 · TMA1091792 | ONEMT Group Holding Limited | 9 Electronics41 Education | Registered | 2021 |
| OMNIENT 1839316 · TMA1052234 | STOXX Ltd. a legal entity | 9 Electronics35 Advertising36 Finance+4 | Registered | 2019 |
| OMNIMED 1797490 · TMA991387 | an individual | 10 Medical | Registered | 2018 |
| ONHAND 1575600 · TMA862215 | ODL, INCORPORATED | 6 Metal16 Paper19 Building+2 | Registered | 2013 |
| OMNINET 1500540 · TMA817919 · design | an individual | 9 Electronics35 Advertising38 Telecommunications | Registered | 2012 |
| omnimate 1471796 · TMA799933 | Weidmuller Interface GmbH & Co. KG | 9 Electronics | Registered | 2011 |
| ONIONHEAD 1465402 · TMA841990 | Onionhead & Company, Inc. | 9 Electronics16 Paper24 Textiles+3 | Registered | 2013 |
| ONEMETHOD 1363424 · TMA721863 | OneMethod Inc. | 35 Advertising41 Education42 Science | Registered | 2008 |
| OMENTIS 1335580 · TMA761154 | Omentis (2007)Inc. | 9 Electronics35 Advertising36 Finance+2 | Registered | 2010 |
| ONENOTE 1177007 · TMA677248 | Microsoft Corporation | 9 Electronics42 Science | Registered | 2006 |
| ONEMYTH 2363824 · design | Shenzhen Tailefeng Communications Co. Ltd. | 9 Electronics | Pending | 2024 |
| OmniMode 2311449 | Owner not shown | 9 Electronics41 Education42 Science | Pending | 2023 |
| onemate 2293110 | Owner not listed | 18 Leather25 Clothing | Pending | 2023 |
| ONEMETA 2265023 | OneMeta Inc | 38 Telecommunications41 Education42 Science | Pending | 2023 |
| ONOMATIC 2248184 | ONOTOMATIC INC./ONOTOMATIQUE INC. | 42 Science | Pending | 2023 |
| OMNIMED 2216769 | OMNImed I LLC | 9 Electronics41 Education42 Science | Pending | 2022 |
| ONEMOOD 2183150 · design | Shenzhen Jingjing Cross-border Information Technology Co. Ltd | 9 Electronics14 Jewellery18 Leather | Pending | 2022 |
| ONOMOTION 2075429 | Onomotion GmbH | 12 Vehicles37 Construction39 Transport | Pending | 2021 |
| OneWant 2006170 | Shenzhen Qanten Technology Co.,Ltd | 21 Housewares | Pending | 2020 |
| ONONDAGA 0902647 · design | DEPARTMENT OF NATIONAL DEFENCE | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1986 |