| Wesslau Advokatbyrå Jönköping Handelsbolag | Jönköping | — |
| Wesslau Advokatservice Handelsbolag | Jönköping | — |
| Westbo Busstrafik AB | Gislaved | — |
| Westerberg Ecom AB | Månsarp | — |
| WESTKASH33 AB | Jönköping | — |
| Wetteråsen Consulting AB | Jönköping | — |
| Wettern Express AB | Tenhult | — |
| Wetterstadens El AB | Jönköping | — |
| Wettertass AB | Norrahammar | — |
| We Will AB | Jönköping | — |
| WF Invest AB | Habo | — |
| WG Skog AB | Holsbybrunn | — |
| WhaleScale AB | Jönköping | — |
| Whatifio AB | Jönköping | — |
| WIDAX AB | Jönköping | — |
| WIDU VASS AB | Tranås | — |
| Wijks Bygghandel AB | Eksjö | — |
| Wildbygg AB | Korsberga | — |
| Wildefjord Partner AB | Sandhem | — |
| Wilhelmsson & Co Handelsbolag | Smålandsstenar | — |
| Wilhelmsson Labs AB | Jönköping | — |
| William Ljungbergh AB | Jönköping | — |
| William Svensén AB | Taberg | — |
| Wi Mark & Anläggning AB | Jönköping | — |
| Wisest Web Solutions AB | Tranås | — |
| Withalastäd & service AB | Nässjö | — |
| WIZZ PU1 AB | Lekeryd | — |
| Wolf Investment AB | Tranås | — |
| WoNLAB AB | Tranås | — |
| Woodtube Sales Sweden AB | Tranås | — |
| Workmates Sweden AB | Bankeryd | — |
| World of Ski AB | Jönköping | — |
| WSAB Industriservice AB | Jönköping | — |
| WSR Solutions AB | Mullsjö | — |
| WWAF AB | Bankeryd | — |
| XANO Industrial Products AB | Jönköping | — |
| X-Prints AB | Jönköping | — |
| Yalba Construction AB | Stockholm | — |
| Y&E AFFROSHOP Handelsbolag | Nässjö | — |
| YSG Konsulting AB | Huskvarna | — |
| Yugou AB | Stockholm | — |
| Zahire Fastigheter AB | Norrahammar | — |
| ZAIA Islamic Art Handelsbolag | Jönköping | — |
| Zar Consulting & Advisory AB | Jönköping | — |
| Zen by S Handelsbolag | Eksjö | — |
| ZEN CHIU AB | Vetlanda | — |
| Z Ljud o Ljus Handelsbolag | Bankeryd | — |