| Bröderna Lorans AB | Norrtälje | 0 tkr |
| Bröderna V&F AB | Norrtälje | 0 tkr |
| Brosättra Holding AB | Rimbo | 0 tkr |
| Brovo Holding AB | Norrtälje | 0 tkr |
| Br. Thoresson AB | Hallstavik | 0 tkr |
| Brunnsvik Sounds Studio AB | Norrtälje | 0 tkr |
| Byggutveckling Promaq AB | Norrtälje | 0 tkr |
| byJezz AB | Rimbo | 0 tkr |
| BYMAtek AB | Vallentuna | 0 tkr |
| Bynäs Ax Förvaltning AB | Norrtälje | 0 tkr |
| ByNovia Entreprenad AB | Norrtälje | 0 tkr |
| Byrenius Mellström AB | Stockholm | 0 tkr |
| Café Wallingränd AB | Rånäs | 0 tkr |
| Caleda AB | Furusund | 0 tkr |
| Califa Holding AB | Norrtälje | 0 tkr |
| Calvaria Property Partner AB | Rimbo | 0 tkr |
| Camanj Invest AB | Norrtälje | 0 tkr |
| Carilana Invest AB | Blidö | 0 tkr |
| Carina Holmlund AB | Norrtälje | 0 tkr |
| Carina Lantz AB | Norrtälje | 0 tkr |
| CARJ AB | Norrtälje | 0 tkr |
| Carl Otterling Förvaltning AB | Rimbo | 0 tkr |
| Carlsson & Burell Holding AB | Norrtälje | 0 tkr |
| Carmira Förvaltning AB | Gräddö | 0 tkr |
| Carpe Diem i Norrtälje AB | Gräddö | 0 tkr |
| Casobo Utvecklings AB | Norrtälje | 0 tkr |
| Castor Hall Holding AB | Norrtälje | 0 tkr |
| Cecilia Hagerling Creative Studio AB | Norrtälje | 0 tkr |
| Centrum Fastigheter Industritomter i Norrtälje AB | Norrtälje | 0 tkr |
| Centrum Fastigheter Property i Norrtälje AB | Norrtälje | 0 tkr |
| CEVA AB | Norrtälje | 0 tkr |
| CForslund Holding AB | Norrtälje | 0 tkr |
| ChaOla AB | Norrtälje | 0 tkr |
| Chenga AB | Norrtälje | 0 tkr |
| Christian Lindstedt Åkeri Aktiebolag | Bergshamra | 0 tkr |
| Christina Lindegren & Partners Aktiebolag | Rimbo | 0 tkr |
| City Catering i Rimbo Aktiebolag | Rånäs | 0 tkr |
| ClaesTech Aktiebolag | Rö | 0 tkr |
| Clever Embedded Systems Technology Sweden AB | Rö | 0 tkr |
| Clippen Förvaltning AB | Norrtälje | 0 tkr |
| COBAB Holding AB | Norrtälje | 0 tkr |
| COBAB Intressebolag AB | Norrtälje | 0 tkr |
| COBAB Invest AB | Norrtälje | 0 tkr |
| COBAB Norrtäljefastigheter AB | Norrtälje | 0 tkr |
| C-O Byggservice Aktiebolag | Bålsta | 0 tkr |
| CodePitcher AB | Rimbo | 0 tkr |
| Codjack Svenska Aktiebolag | Edsbro | 0 tkr |
| Cogson Computer Systems AB | Norrtälje | 0 tkr |
| Compete Competence MR AB | Kolsva | 0 tkr |
| Concernus Invest AB | Stockholm | 0 tkr |