| Wellcome Trust Centre for Cell Biology (WTCCB) |
| Wellspring Philanthropic Fund Inc. |
| Welsh National Opera Limited |
| Welsh Water |
| Wendy Arnold & Co. Ltd [Trading as ELT-Consultants] |
| WEPA Hygieneprodukte GmbH |
| WEPA UK Limited |
| West Bromwich Building Society |
| West Kowloon Cultural District Authority |
| Weybourne Holdings Pte Ltd |
| WH Smith Plc |
| WHEB Asset Management LLP |
| WHEB LLP |
| Whirlpool Corp |
| WHISTL CONSOLIDATED LIMITED (previously NNY 91) |
| White Ribbon Alliance For Safe Motherhood, Inc. |
| White Stuff Group Ltd |
| White Stuff Ltd |
| Whiteboard Journal |
| Whittard Trading Ltd |
| WHO CARES LIMITED |
| WHO Foundation |
| Who Gives A Crap Ltd |
| Wild Cosmetics Limited |
| Wildlife and Nature Protection Society of Sri Lanka |