| W. H. Smith plc | London |
| W. L. Gore & Associates UK Ltd | Livingston |
| Waitrose Ltd | Bracknell |
| Wales Council for Voluntary Action (WCVA) | Cardiff |
| Wales Weight Lifting Federation | Ammanford |
| Walker Morris | Leeds |
| Walkers Snack Foods Ltd | Reading |
| The Walt Disney Company | London |
| Warburtons Ltd | Bolton |
| Warner Leisure Hotels | Hemel Hempstead |
| Water Ski Scotland | Dunfermline |
| We Research It Ltd | Uttoxeter |
| Weatherbys Group Ltd | Wellingborough |
|
WEBVine | London |
| Weetabix Ltd | Kettering |
| The Weir Group PLC | Glasgow |
| Wella UK Ltd | Basingstoke |
| Wells & Young's Brewing Company Ltd | Bedford |
| Welsh Amateur Rowing Association (WARA) | Cardiff |
| Welsh Athletics | Cardiff |
| The Welsh Badminton Union (WBU) | Cardiff |
| Welsh Billiards & Snooker Association | Llanelli |
| Welsh Canoeing Association | Bala |
| The Welsh Cricket Association | Swansea |
| Welsh Cycling Union (WCU) | Newport |
| Welsh Fencing | Cardiff |
| Welsh Gymnastics Association (WGA) | Cardiff |
| Welsh Hockey Union Ltd | Cardiff |
| Welsh Ice Skating Association (WISA) | Frodsham |
| Welsh Indoor Bowls Association (WIBA) | Swansea |
| Welsh Karate Governing Body | Kilgetty |
| Welsh Lacrosse Association (WLA) | Penarth |
| Welsh Ladies' Indoor Bowls Association | Rhondda |
| Welsh Netball Association (WNA) | Cardiff |
|
The Welsh Rugby Union Group | Cardiff |
| The Welsh Surfing Federation | Swansea |
| Welsh Tug-of-War Association | Llantwit Major |
| Welsh Water Ski Association | Cardiff |
| The Welsh Whisky Company | Aberdare |
| Welsh Women's Bowling Association | Pontyclun |
| Welsh Yachting Association (WYA) | Caernarfon |
| Wembley National Stadium Ltd | London |
| Wesleyan Financial Services | Birmingham |
| Wessex Water | Bath |
| West Bromwich Building Society | West Bromwich |
| Westcoast Ltd | Reading |
| Western Daily Press (Bristol) | Bristol |
| Western Union | London |
| WheelPower - British Wheelchair Sport | Aylesbury |
| Whirlpool UK | Croydon |
| Whitbread Group PLC | Dunstable |
| Whyte & Mackay Ltd | Glasgow |
| Wieden & Kennedy London | London |
| Wightlink | Portsmouth |
| Wilkinson Sword Ltd | High Wycombe |
| William Grant & Sons International Ltd | Richmond |
| William Morrison Supermarkets PLC | Bradford |
| Winterflood Securities Ltd | London |
| Wirral Borough Council | Wallasey |
| WM Magner | Cambridge |
| Wogen Group Ltd | London |
| Women's Football | London |
| Woo | London |
| Woodworm Cricket Company | Billingshurst |
| Woolworths Plc | London |
| Works Infrastructure Ltd | Rotherham |
| The WorksLondon | London |
| Workspace Group PLC | London |
| World Curling Federation (WCF) | Perth |
| The World Famous Group | London |
| World in Motion | London |
| World Indoor Bowls Council (WIBC) | Swansea |
| World Leisurewear | Cowes |
| World Snooker | Bristol |
| WPP | London |
| The Wrigley Company Ltd | Plymouth |
| WRW Group Ltd | Llanelli |
| WSM Sponsorship Ltd | London |
| www.timesonline.co.uk | London |
