| Water Communication |
| Waterstones Booksellers Limited |
| Watkins Drinks Limited |
| Wave Foundation |
| We Are Living Proof Ltd |
| We Are Unlimited Arts |
| We Love Holidays Ltd |
| Weetabix Ltd |
| Weleda AG |
| Welfare Association for New Generation (WANG) |
| Wella GmBH |
| Wellcome Collection |
| Wellcome Trust |
| 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 |