| Axmi AB | Herräng | 0 tkr |
| AX Uthyrning AB | Hallstavik | 0 tkr |
| BabyNord Group AB | Väddö | 0 tkr |
| Backtorpens Utvecklings AB | Hallstavik | 0 tkr |
| Backtorps Fastighets AB | Norrtälje | 0 tkr |
| Backyard Holding AB | Norrtälje | 0 tkr |
| Bålbro Property Partner AB | Rimbo | 0 tkr |
| BällstaHill Invest AB | Vallentuna | 0 tkr |
| Bällstaudde Bostadsutveckling AB | Norrtälje | 0 tkr |
| Bålmyren Fastighets AB | Hallstavik | 0 tkr |
| Barbro Ljungman Holding AB | Stockholm | 0 tkr |
| BASAB HOLDING AB | Norrtälje | 0 tkr |
| BCS Holding AB | Bergshamra | 0 tkr |
| Bellix AB | Norrtälje | 0 tkr |
| Bems AB | Malmö | 0 tkr |
| BERGBY INVEST AB | Hallstavik | 0 tkr |
| Bergs psykologi och hälsosamtal AB | Norrtälje | 0 tkr |
| Bergsvreten Förvaltning AB | Arholma | 0 tkr |
| Berit Lovén Holding AB | Edsbro | 0 tkr |
| BG Nöjen och Fritid AB | Norrtälje | 0 tkr |
| Biopart Holding AB | Norrtälje | 0 tkr |
| Biquebradas AB | Rö | 0 tkr |
| Birchlund AB | Norrtälje | 0 tkr |
| Bjesse Hyresfastigheter AB | Solna | 0 tkr |
| Björklund & Son i Norrtälje AB | Norrtälje | 0 tkr |
| Björknäs Holding AB | Riala | 0 tkr |
| Björkö Invest AB | Norrtälje | 0 tkr |
| Björnbärsbusken AB | Västervik | 0 tkr |
| Björnbom i Norrtälje AB | Norrtälje | 0 tkr |
| Björn Sandberg Förvaltning AB | Norrtälje | 0 tkr |
| Björns Sjöservice Aktiebolag | Blidö | 0 tkr |
| Bjurvéns Holding AB | Norrtälje | 0 tkr |
| BlackNacre Gräv & Maskin AB | Norrtälje | 0 tkr |
| BlackNacre Invest AB | Norrtälje | 0 tkr |
| Blidö bemanning AB | Blidö | 0 tkr |
| Bohman & Eriksson AB | Rånäs | 0 tkr |
| BOINNOVATION Holding AB | Norrtälje | 0 tkr |
| Bokmalen redovisning AB | Norrtälje | 0 tkr |
| Bomiso AB | Uppsala | 0 tkr |
| Bonum Vitae AB | Norrtälje | 0 tkr |
| BOREG AB | Norrtälje | 0 tkr |
| Bornsjöborg Fastigheter AB | Väddö | 0 tkr |
| Bo's Bussar och Entreprenad AB | Hallstavik | 0 tkr |
| Brainability AB | Grisslehamn | 0 tkr |
| BraineHealth AB | Norrtälje | 0 tkr |
| Brandwold Consulting AB | Norrtälje | 0 tkr |
| Bresken AB | Norrtälje | 0 tkr |
| BRF Utveckling 1 Projekt AB | Norrtälje | 0 tkr |
| Broby Företag AB | Rö | 0 tkr |
| Brockenhuus Property Partners AB | Rimbo | 0 tkr |