| ONTRAK 1925013 · TMA1106356 | Spacelabs Holdings, Inc. | 10 Medical | Registered | 2021 |
| OnTraX 1924573 · TMA1124696 | an individual | 9 Electronics12 Vehicles | Registered | 2022 |
| onTRAC 1429126 · TMA825612 | SDI INNOVATIONS, INC. | 9 Electronics16 Paper24 Textiles+1 | Registered | 2012 |
| ONTRAC 1241830 · TMA755602 | Novariant, Inc. (a California corporation) | 7 Machines9 Electronics12 Vehicles | Registered | 2009 |
| ONTRAK 0891096 · TMA554336 | Sodexo Canada, Ltd. | 41 Education | Registered | 2001 |
| ONTRAC 2361327 | Dyson Technology Limited | 9 Electronics | Pending | 2024 |
| ONTRAC 2361326 · design | Dyson Technology Limited | 9 Electronics | Pending | 2024 |
| ONTRA 2268059 · design | Owner not listed | 42 Science45 Legal | Pending | 2023 |
| ONTRA 2189269 | InCloud, LLC | 9 Electronics42 Science45 Legal | Pending | 2022 |
| ONETRAC 1802009 · TMA1002135 | CooperSurgical, Inc. | 10 Medical | Registered | 2018 |
| ONTRACK 1765151 · TMA1012906 | PERIMETER 9 INC. | 6 Metal9 Electronics19 Building+3 | Registered | 2019 |
| ONTRACK 1477053 · TMA853573 | KLDiscovery Ontrack, LLC | 9 Electronics35 Advertising38 Telecommunications+2 | Registered | 2013 |
| ONTRACE 1405549 · TMA762555 · design | Owner not shown | 9 Electronics42 Science | Registered | 2010 |
| ONTRACK 1313757 · TMA730031 · design | PERIMETER 9 INC. | 6 Metal19 Building35 Advertising+2 | Registered | 2008 |
| ONTRO 2174306 · TMA1226124 · design | LINGYI ALTERNATIVE ENERGY TECHNOLOGY (SHANGHAI) CO. LTD. | 12 Vehicles | Registered | 2024 |
| ONTRUE 2094477 · TMA1150683 · design | Xiamen Sungiven Foods Holding Co. Ltd. | 32 Beer33 Wine | Registered | 2022 |
| ONTRUE 1646420 · TMA906312 · design | XIAMEN SUNGIVEN FOODS HOLDING LTD. | 16 Paper21 Housewares29 Meat+5 | Registered | 2015 |
| ONTERA 1512286 · TMA838792 · design | NorthernTel Limited Partnership | 38 Telecommunications | Registered | 2012 |
| ONTERA 1512280 · TMA838791 | NorthernTel Limited Partnership | 38 Telecommunications | Registered | 2012 |
| ONTERA 1991444 | Ontera Inc. | 9 Electronics10 Medical42 Science+1 | Pending | 2019 |
| ONTERA 0916078 · design | O.N. Tel Inc. | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2005 |
| ONTERA 0916077 | O.N. Tel Inc. | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2005 |
| ONETRIAL 2020870 · TMA1264999 | Owner not shown | 42 Science | Registered | 2024 |
| ONETRACK 1467479 · TMA828577 | Crane Payment Innovations, Inc. | 9 Electronics | Registered | 2012 |
| OMNITRAX 1253986 · TMA707614 | Senstar Corporation | 9 Electronics | Registered | 2008 |