| Wallgus Engineering AB | Västerås | 0 tkr |
| Wallingatan i Stockholm Förvaltningsaktiebolag | Stockholm | 0 tkr |
| Wanda Sikorska AB | Västerås | 0 tkr |
| Wane Invest AB | Västerås | 0 tkr |
| Wannberg Konsult AB | Västerås | 0 tkr |
| Wässans AB | Västerås | 0 tkr |
| Wattly Group AB | Västerås | 0 tkr |
| Wawab Holding AB | Västerås | 0 tkr |
| Way To Go AB | Västerås | 0 tkr |
| WB Equity AB | Västerås | 0 tkr |
| WeBe & BSGA Fastigheter AB | Västerås | 0 tkr |
| WeBe & BSGA Holding AB | Västerås | 0 tkr |
| Wedab Holding AB | Västerås | 0 tkr |
| Wenche Sörvåg AB | Västerås | 0 tkr |
| Wendelstam Invest AB | Västerås | 0 tkr |
| Wenniz AB | Västerås | 0 tkr |
| West-Ave Sweden AB | Västerås | 0 tkr |
| Westerås WorkWear AB | Västerås | 0 tkr |
| Westeros Entertainment AB | Västerås | 0 tkr |
| West-In Västerås AB | Västerås | 0 tkr |
| Westlake Balans AB | Västerås | 0 tkr |
| West Meadow Holding AB | Västerås | 0 tkr |
| Westra Aros Business Partner AB | Västerås | 0 tkr |
| Westra Aros Service AB | Västerås | 0 tkr |
| Westridge Power AB | Västerås | 0 tkr |
| Whitesurf Management AB | Västerås | 0 tkr |
| Widerström Holding AB | Västerås | 0 tkr |
| Widforss Industries AB | Västerås | 0 tkr |
| Widlunds i Västerås AB | Västerås | 0 tkr |
| Wikhult Holding AB | Västerås | 0 tkr |
| Wilson Fastigheter AB | Västerås | 0 tkr |
| Wilson Invest AB | Västerås | 0 tkr |
| WinCo AB | Västerås | 0 tkr |
| Windcon AB | Västerås | 0 tkr |
| Windeed AB | Västerås | 0 tkr |
| Wingård Systems AB | Västerås | 0 tkr |
| Wisely Company AB | Västerås | 0 tkr |
| WIWEB Consulting Holding AB | Västerås | 0 tkr |
| W.J. Bemanning & Logistik AB | Västerås | 0 tkr |
| WLS Holding AB | Västerås | 0 tkr |
| WONG KOMPANIET AKTIEBOLAG | Mölndal | 0 tkr |
| Wonline AB | Västerås | 0 tkr |
| Woodsafe International AB | Västerås | 0 tkr |
| WP Teknikförvaltning AB | Västerås | 0 tkr |
| Wretholm Invest AB | Västerås | 0 tkr |
| Wulcan anläggning och transport AB | Västerås | 0 tkr |
| XArse Greentech AB | Västerås | 0 tkr |
| XIA Invest AB | Västerås | 0 tkr |
| Xpandia AB | Strömsholm | 0 tkr |
| xqz invest AB | Västerås | 0 tkr |