| West Invest i Umeå AB | Umeå | 0 tkr |
| Westside invest i Skellefteå AB | Skellefteå | 0 tkr |
| WF TRE Holding AB | Umeå | 0 tkr |
| Whalebay AB | Umeå | 0 tkr |
| Whalley Range AB | Skellefteå | 0 tkr |
| WhiteWinter AB | Umeå | 0 tkr |
| Wholly Dog AB | Stockholm | 0 tkr |
| WHW Holding AB | Norsjö | 0 tkr |
| Wickmans Auktion AB | Örnsköldsvik | 0 tkr |
| Widebo förvaltning AB | Täfteå | 0 tkr |
| Widings kursportal AB | Tärnaby | 0 tkr |
| WIDKA AB | Sköldinge | 0 tkr |
| Widman Timing AB | Boliden | 0 tkr |
| Widmarks i Gullänget Aktiebolag | Tavelsjö | 0 tkr |
| Wikestone Bygg & Fastigheter AB | Umeå | 0 tkr |
| Wikströmmarna i Bastuträsk AB | Bastuträsk | 0 tkr |
| Wila Studio AB | Umeå | 0 tkr |
| Wiljes Invest AB | Holmsund | 0 tkr |
| Wilkob AB | Umeå | 0 tkr |
| Willman & Pelle Holding AB | Umeå | 0 tkr |
| Willskytt Holding AKTIEBOLAG | Robertsfors | 0 tkr |
| Wilolian Holding AB | Umeå | 0 tkr |
| WIMELT AB | Tavelsjö | 0 tkr |
| Windelvest AB | Hällnäs | 0 tkr |
| Windowcrane AB | Lycksele | 0 tkr |
| WindstormPRO AB | Umeå | 0 tkr |
| Windstorm Ume AB | Umeå | 0 tkr |
| Winmark AB | Umeå | 0 tkr |
| Winnerfall Holding AB | Skellefteå | 0 tkr |
| Winterkeep AB | Täfteå | 0 tkr |
| Winvestering i Umeå AB | Obbola | 0 tkr |
| W Invest i Skellefteå AB | Bureå | 0 tkr |
| Wirthig Plåt & Isolering Aktiebolag | Umeå | 0 tkr |
| Wisalsson AB | Vännäs | 0 tkr |
| Wisu Holding AB | Skellefteå | 0 tkr |
| WIT Invest AB | Skellefteå | 0 tkr |
| WK Holding AB | Umeå | 0 tkr |
| WLJ Holding AB | Malå | 0 tkr |
| Woke AB | Holmsund | 0 tkr |
| Woodheads AB | Umeå | 0 tkr |
| WOW Hairdressing Holding AB | Umeå | 0 tkr |
| WPeltekis AB | Umeå | 0 tkr |
| Wredin Holding AB | Umeå | 0 tkr |
| Wu i Skellefteå AB | Skellefteå | 0 tkr |
| W.W INVEST AB | Bureå | 0 tkr |
| X Concept AB | Skellefteå | 0 tkr |
| Xerum AB | Umeå | 0 tkr |
| XFC Holding AB | Umeå | 0 tkr |
| Xia Eastern i Umeå AB | Umeå | 0 tkr |
| XL elservice AB | Umeå | 0 tkr |