| WILLIAMS 1646108 · TMA891900 · design | Williams Boot & Glove Dryers Inc. | 11 Lighting | Registered | 2014 |
| williamsburg 1526680 · TMA847336 | Superior Co. Ltd. | 25 Clothing | Registered | 2013 |
| WILLIAMS 1394943 · TMA748373 · design | WILLIAMS TOWING SERVICE LTD. | 39 Transport | Registered | 2009 |
| WILLIAMS 0871084 · TMA554482 · design | THE WILLIAMS COMPANIES, INC. A CORPORATION ORGANIZED AND EXISTING UNDER THE LAWS OF THE STATE OF DELAWARE | 4 Oils9 Electronics16 Paper+11 | Registered | 2001 |
| WILLIAMS 0793343 · TMA473336 · design | Combe Incorporated | 3 Cosmetics | Registered | 1997 |
| WILLIAMS 0787682 · TMA474123 | Snap-on Incorporated (a Delaware corporation) | 6 Metal7 Machines8 Hand+3 | Registered | 1997 |
| WILLIAMS 0756765 · TMA460091 | Energy Mfg. Co. Inc. | 12 Vehicles | Registered | 1996 |
| WILLIAMS 0748126 · TMA438570 | Light & Wonder, Inc. | 28 Toys | Registered | 1995 |
| WILLIAMSBURG 0612498 · TMA416812 | THE COLONIAL WILLIAMSBURG FOUNDATION | 16 Paper24 Textiles27 Carpets | Registered | 1993 |
| WILLIAMSBURG 0549143 · TMA331227 | THE COLONIAL WILLIAMSBURG FOUNDATION | 21 Housewares24 Textiles | Registered | 1987 |
| WILLIAMSBURG 0478947 · TMA287881 | THE COLONIAL WILLIAMSBURG FOUNDATION | 1 Chemicals8 Hand9 Electronics+4 | Registered | 1984 |
| WILLIAMS 0411675 · TMA236646 | Materion Advanced Materials Technologies and Services Inc. | 1 Chemicals2 Paints3 Cosmetics+20 | Registered | 1979 |
| WILLIAMS 0380164 · TMA219735 | Milton Roy, LLC | 7 Machines | Registered | 1977 |
| WILLIAMS 0207596 · UCA36885 | BRECKS INTERNATIONALE INC./BRECKS INTERNATIONAL INC. | 6 Metal14 Jewellery16 Paper+4 | Registered | 1950 |
| WILLIAMS 0151977 · TMDA50224 | Combe Incorporated | 3 Cosmetics | Registered | 1930 |
| WILLIAMS 0147851 · TMDA47524 | Combe Incorporated | 3 Cosmetics | Registered | 1929 |
| WILLIAMS 0125262 · TMDA38343 | Combe Incorporated | 3 Cosmetics | Registered | 1925 |
| WILLIAMS 2334853 | BCE IP Holdings LLC | 9 Electronics12 Vehicles14 Jewellery+12 | Pending | 2024 |
| WELLNESSSPACE 2347042 | JTL Enterprises, Inc. | 10 Medical | Pending | 2024 |
| WELLNESS 2262766 · TMA1283180 · design | Wellness Pet, LLC | 31 Fresh | Registered | 2025 |
| WLHONG 2229067 · TMA1252888 | Shenzhen Huaxun Import and Export Trade Co. Ltd. | 11 Lighting | Registered | 2024 |
| 360 Wellness 2193546 · TMA1237229 | an individual | 44 Medical | Registered | 2024 |
| WOLONG 2164714 · TMA1182057 · design | WOLONG ELECTRIC GROUP CO. LTD. | 7 Machines | Registered | 2023 |
| WOOLONG 2158883 · TMA1213232 | an individual | 9 Electronics | Registered | 2023 |
| WILINCARE 2128338 · TMA1211952 · design | Ningbo Wilincare Biotech Co. Ltd. | 5 Pharmaceuticals | Registered | 2023 |