| WORKFACE 1560644 · TMA841243 | Industrial Audit Corporation | 9 Electronics35 Advertising42 Science | Registered | 2013 |
| Workpath 1999439 · TMA1120292 | Workpath GmbH | 9 Electronics16 Paper35 Advertising+2 | Registered | 2022 |
| WORKFIT 1812364 · TMA1001485 | Ergotron, Inc. | 9 Electronics20 Furniture | Registered | 2018 |
| WORKPAC 1277784 · TMA681323 | CASCADES HOLDING US INC. | 21 Housewares | Registered | 2007 |
| WORKFLOW 2115333 · TMA1234314 | Kraus USA Plumbing LLC | 11 Lighting | Registered | 2024 |
| WORKBOT 2083873 · TMA1259211 | WORKATO, Inc. | 9 Electronics42 Science | Registered | 2024 |
| WORKFORCE 2013163 · TMA1202365 | WESTLAKE DIMEX LLC | 27 Carpets | Registered | 2023 |
| WORKABLE 1948666 · TMA1230881 | Workable Technology Limited | 9 Electronics35 Advertising38 Telecommunications+1 | Registered | 2024 |
| WORKFIL 1936511 · TMA1111172 | Filspec Inc. | 23 Yarns | Registered | 2021 |
| WORKWAVE 1733727 · TMA999382 | WorkWave LLC | 9 Electronics35 Advertising42 Science | Registered | 2018 |
| WORKIVA 1686698 · TMA947765 | Workiva Inc. | 42 Science | Registered | 2016 |
| WORKIVA 1686697 · TMA947767 · design | Workiva Inc. | 42 Science | Registered | 2016 |
| WORKPASS 1616245 · TMA921357 | Workpass Limited | 9 Electronics35 Advertising36 Finance+5 | Registered | 2015 |
| WORKFORCE 1519255 · TMA872355 | Seiko Epson Kabushiki Kaisha (also trading as Seiko Epson Corporation). | 2 Paints9 Electronics | Registered | 2014 |
| WORKFLEX 1489781 · TMA818922 | WorkFlex Solutions LLC | 35 Advertising42 Science | Registered | 2012 |
| WORKFORCE 1373670 · TMA729901 | Seiko Epson Kabushiki Kaisha (also trading as Seiko Epson Corporation). | 9 Electronics | Registered | 2008 |
| WorkCabin 1349855 · TMA721327 | an individual | 35 Advertising41 Education42 Science | Registered | 2008 |
| WORKPLACE 1164285 · TMA621983 | Workplace Modular Systems, LLC | 20 Furniture42 Science | Registered | 2004 |
| WORKPLACE 0879377 · TMA565288 | Workplace Modular Systems, LLC | 20 Furniture | Registered | 2002 |
| WORKFORCE 0838647 · TMA673012 | Home Depot International, Inc. | 7 Machines8 Hand9 Electronics | Registered | 2006 |
| WORKSAFE 0684858 · TMA401752 | Wearwell, LLC | 27 Carpets | Registered | 1992 |
| WORKFORCE 0666385 · TMA403849 | Home Depot International, Inc. | 1 Chemicals2 Paints3 Cosmetics+11 | Registered | 1992 |
| WORKBASE 2333277 | Grey Matter Concepts Apparel Group Corp. | 25 Clothing | Pending | 2024 |
| Workflo 2314729 | VEBLOC INC. | 9 Electronics38 Telecommunications42 Science | Pending | 2024 |
| WORKFORGE 2250112 | Owner not listed | 35 Advertising41 Education | Pending | 2022 |