A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 1
| Wal-Mart Canada (645) | Walmart Canada (111) |
| Walmart Canada Corp (785) | Wardrop Engineering (5) |
| Wargaming (5) | Washington Metropolitan Area Transit Authority (20) |
| Waste Management (50) | Waste Management, Inc. (7) |
| Waterfront International Ltd. (9) | Weatherford (8) |
| Weed Man Canada (8) | Wegmans (6) |
| Wescam (16) | West Bend (8) |
| West Jet (9) | Western Financial Group (5) |
| WestJet (20) | Whistler Personnel Solutions (7) |
| Wholesale Merchant Services (6) | Williams Alton & Associates Inc. (9) |
| Wilson Executive Search (11) | WilsonHCG (17) |
| WIND Mobile (5) | Windsor Star Ad (6) |
| Windstream Communications (11) | Wine Rack (48) |
| Winston Retail (8) | Wishabi Inc (7) |
| WMATA (23) | Wood Bench Inc (5) |
| WorkerBee TV (6) | Workplace Safety Group (6) |
| World Health Club (30) | Worldwide Immigration Consultancy Services (WWICS) (13) |
| Worley Parsons (6) | WorleyParsons (201) |
| WSIB (5) | Wurth Canada (5) |
| www.sierraatlantic.com (6) | Wyle (11) |
| Wyndham Worldwide (13) | Wyndham Worldwide Canada Inc. (6) |