| John L H AB | Märsta | 0 tkr |
| JOMAR EMPIRE AB | Märsta | 0 tkr |
| Jonah & Kibirige Holding AB | Märsta | 0 tkr |
| Jonssons Glasmästeri Holding AB | Märsta | 0 tkr |
| Jorun Ohlsén Tandläkare Aktiebolag | Sigtuna | 0 tkr |
| JRMB AB | Sigtuna | 0 tkr |
| JTG Sweden AB | Sigtuna | 0 tkr |
| JVO Invest AB | Bro | 0 tkr |
| JVS Teknik AB | Märsta | 0 tkr |
| KAFAST AB | Märsta | 0 tkr |
| Kanal power AB | Märsta | 0 tkr |
| Kapporeth AB | Arlandastad | 0 tkr |
| Karby Holding AB | Märsta | 0 tkr |
| Karin Edblad Design AB | Uppsala | 0 tkr |
| Karneheds Restaurang AB | Sigtuna | 0 tkr |
| KCVS Holding AB | Uppsala | 0 tkr |
| Keding & Co AB | Älvsjö | 0 tkr |
| Kenli AB | Märsta | 0 tkr |
| Kent Ekström Holding AB | Rosersberg | 0 tkr |
| KESARO AB | Rosersberg | 0 tkr |
| Kiantus AB | Märsta | 0 tkr |
| KJARA Fastigheter AB | Märsta | 0 tkr |
| KJ Taktik Holding AB | Märsta | 0 tkr |
| Klas Törnqvist Holding AB | Märsta | 0 tkr |
| Klebtuli AB | Bromma | 0 tkr |
| Klingsbo Ventures AB | Johanneshov | 0 tkr |
| Kode Arena AB | Kista | 0 tkr |
| Komötet Holding AB | Sigtuna | 0 tkr |
| Konsultverket i Stockholm AB | Märsta | 0 tkr |
| Kopparnäbben AB | Märsta | 0 tkr |
| Kredits Sverige AB | Sigtuna | 0 tkr |
| Kredsson AB | Arlandastad | 0 tkr |
| Kretspunkten Konsult AB | Rosersberg | 0 tkr |
| Kronovallen AB | Sigtuna | 0 tkr |
| Kvalitid digital AB | Sigtuna | 0 tkr |
| KWM Renovering AB | Märsta | 0 tkr |
| LAB COOL HOLDING AB | Sigtuna | 0 tkr |
| Lähdet Holding AB | Upplands Väsby | 0 tkr |
| Lakeshore AB | Sigtuna | 0 tkr |
| Landvetter Hotell Holding AB | Norrköping | 0 tkr |
| Landvetter Logistic Park 1 Holding AB | Norrköping | 0 tkr |
| Landvetter Logistic Park 2 Holding AB | Norrköping | 0 tkr |
| Landvetter Office Holding AB | Norrköping | 0 tkr |
| Landvetter Retail Holding AB | Norrköping | 0 tkr |
| Länsvillan AB | Märsta | 0 tkr |
| Lars Kjellberg Holding AB | Sigtuna | 0 tkr |
| LC Sigtuna 2.0 AB | Norrköping | 0 tkr |
| LECV AB | Sigtuna | 0 tkr |
| Legacy El AB | Rosersberg | 0 tkr |
| lemad AB | Märsta | 0 tkr |