| WorkCabin 1349855 · TMA721327 | an individual | 35 Advertising41 Education42 Science | Registered | 2008 |
| WORKSPAN 1276662 · TMA680900 | WorldatWork | 16 Paper | Registered | 2007 |
| WORKBASE 2333277 | Grey Matter Concepts Apparel Group Corp. | 25 Clothing | Pending | 2024 |
| WORKBOAT 2210568 | an individual | 35 Advertising41 Education | Pending | 2022 |
| WORKBRUTES 1774114 · TMA989068 | Bunzl IP Holdings, LLC | 9 Electronics25 Clothing | Registered | 2018 |
| WORKBRIDGE 1654816 · TMA956884 | Motion Recruitment Partners LLC | 35 Advertising | Registered | 2016 |
| WORKBOT 2083873 · TMA1259211 | WORKATO, Inc. | 9 Electronics42 Science | Registered | 2024 |
| WORKPROX 2044640 · TMA1266641 · design | HANGZHOU GREAT STAR INDUSTRIAL CO. LTD. | 7 Machines8 Hand | Registered | 2024 |
| WORKPROUD 2034813 · TMA1132847 | Whapps, LLC | 9 Electronics42 Science | Registered | 2022 |
| WORKPRO 2031185 · TMA1266585 · design | HANGZHOU GREAT STAR INDUSTRIAL CO. LTD. | 9 Electronics | Registered | 2024 |
| Workpath 1999439 · TMA1120292 | Workpath GmbH | 9 Electronics16 Paper35 Advertising+2 | Registered | 2022 |
| WORKBOOK 1977668 · TMA1171841 | DELTEK, INC. | 9 Electronics35 Advertising42 Science | Registered | 2023 |
| WORKFIL 1936511 · TMA1111172 | Filspec Inc. | 23 Yarns | Registered | 2021 |
| WORKPRO 1901392 · TMA1174132 | MARK'S WORK WEARHOUSE LTD. | 35 Advertising | Registered | 2023 |
| WORKFIT 1812364 · TMA1001485 | Ergotron, Inc. | 9 Electronics20 Furniture | Registered | 2018 |
| WORKPRO 1811220 · TMA1044104 · design | HANGZHOU GREAT STAR INDUSTRIAL CO. LTD. | 6 Metal7 Machines8 Hand+6 | Registered | 2019 |
| WorksBase 1740099 · TMA949154 | an individual | 42 Science | Registered | 2016 |
| 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 |
| WORKPRO 1685625 · TMA956801 | HANGZHOU GREAT STAR INDUSTRIAL CO. LTD. | 6 Metal7 Machines8 Hand+7 | Registered | 2016 |
| WORKPRO 1657964 · TMA915947 | OMX, Inc. | 20 Furniture | Registered | 2015 |
| WORKBENCH 1620276 · TMA896265 | B2 Fashions Inc. | 1 Chemicals3 Cosmetics18 Leather+6 | Registered | 2015 |
| WORKPASS 1616245 · TMA921357 | Workpass Limited | 9 Electronics35 Advertising36 Finance+5 | Registered | 2015 |
| WORKFACE 1560644 · TMA841243 | Industrial Audit Corporation | 9 Electronics35 Advertising42 Science | Registered | 2013 |