| Women's Playhouse Trust |
| WOOSH BIKES LTD |
| Worcester Heat Systems |
| World Bank |
| World Cities Culture Forum |
| World Habitat |
| World Monuments Fund, Inc. |
| World of Books Group Ltd |
| World Voice and Art Association Ethiopia |
| World Wildlife Fund International |
| WP Engine, Inc. |
| Wrap Ltd (was AwesomeBooks Limited) |
| Wright & Grainger |
| Writers Project of Ghana |
| WS Badger Co Inc |
| Wuxi Suntech Power Co Ltd |
| WWF Pakistan |
| WWF Sweden |
| WWF-UK |
| WWF-UK (World Wide Fund For Nature) Trading Ltd |
| Wyrd Flora |
| Xero |
| Xiaomi Corporation |
| xigxag Limited |
| Xinhua News Agency |