| BiCare AB | Eskilstuna | 0 tkr |
| BiGuest AB | Eskilstuna | 0 tkr |
| Bihälsan Sverige AB | Gimo | 0 tkr |
| Bilfrakt i Valla AB | Valla | 0 tkr |
| Billfactory AB | Eskilstuna | 0 tkr |
| Billow Group AB | Skogstorp | 0 tkr |
| Bill Samuelson Hotell & Café Aktiebolag | Bettna | 0 tkr |
| Bilreservdelsdepån Invest i Strängnäs Aktiebolag | Strängnäs | 0 tkr |
| Binalood AB | Eskilstuna | 0 tkr |
| BINI Konsult AB | Stockholm | 0 tkr |
| Binokulär Holding AB | Nyköping | 0 tkr |
| Biodome AB | Edsele | 0 tkr |
| BIPP Holding AB | Stallarholmen | 0 tkr |
| Birchbark Capital AB | Katrineholm | 0 tkr |
| Birchbark Fastigheter AB | Katrineholm | 0 tkr |
| Bireri i Eskilstuna AB | Eskilstuna | 0 tkr |
| Birgitta Ed AB | Strängnäs | 0 tkr |
| Birgitta Månsson Juridik AB | Eskilstuna | 0 tkr |
| BITAB Belsing Isolering & Takläggning Holding AB | Strängnäs | 0 tkr |
| Biwa Holding i Trosa AB | Trosa | 0 tkr |
| Bjöek AB | Eskilstuna | 0 tkr |
| BJÖRKÖ HOLDING AB | Nyköping | 0 tkr |
| Björksund Invest AB | Tystberga | 0 tkr |
| Björksund Nordväst Fastigheter AB | Tystberga | 0 tkr |
| Björkviks jakt och fritid AB | Björkvik | 0 tkr |
| Björkviks Snickeri Förvaltning AB | Björkvik | 0 tkr |
| Björn Bylund Holding AB | Strängnäs | 0 tkr |
| Björn Dahl Projektstyrning AB | Karlstad | 0 tkr |
| Björn Olof Holding AB | Eskilstuna | 0 tkr |
| Björsund förvaltning AB | Strängnäs | 0 tkr |
| Bjureli AB | Nyköping | 0 tkr |
| Bjurenborg Invest AB | Nyköping | 0 tkr |
| Bjurshagens Boutique AB | Torshälla | 0 tkr |
| BKG Tand AB | Strängnäs | 0 tkr |
| BKK Express Holding AB | Eskilstuna | 0 tkr |
| BKRN Holding AB | Eskilstuna | 0 tkr |
| Blaaklint AB | Nyköping | 0 tkr |
| BlackEarth Properties AB | Umeå | 0 tkr |
| Blackis Media AB | Eskilstuna | 0 tkr |
| Blackwood Fastigheter AB | Mariefred | 0 tkr |
| Blå Invest AB | Stockholm | 0 tkr |
| Blå Landet AB | Eskilstuna | 0 tkr |
| Blaxstaby Holding AB | Flen | 0 tkr |
| BLC Invest AB | Nyköping | 0 tkr |
| Blippkey AB | Hägersten | 0 tkr |
| BLOKKFAST i Mälardalen AB | Eskilstuna | 0 tkr |
| Blueiron Sverige AB | Nyköping | 0 tkr |
| BluePipe AB | Nyköping | 0 tkr |
| BM Certification Sweden AB | Lidingö | 0 tkr |
| BMH Invest AB | Laxå | 0 tkr |