| Kokkersvold Kran Og Transport AS | Langangen | 2006 |
| Kol Transport AS | Saltstraumen | 2000 |
| Kolanko Transport SP. Z O.O. SP. K | Pl-83-330 Borkowo | 2019 |
| Kolarz Transport Marcin Skwierawski Nuf | 75-426 Koszalin | 2026 |
| Kolbeinsvik Kai AS | Kolbeinsvik | 2002 |
| Kolbotn Taxi AS | Vinterbro | 2019 |
| Kollektivterminalen AS | Arendal | 2005 |
| Kollitaxi AS | Trondheim | 2002 |
| Kollsete Thermotransport AS | Sogndal | 2012 |
| Kolnes Transport AS | Førresfjorden | 2017 |
| Kolsgård Og Jørgensen Ans | Solbergelva | 1990 |
| Kolsrud Group AS | Oslo | 2016 |
| Kolsrud Services AS | Oslo | 2017 |
| Kolstad Taxi AS | Saupstad | 2024 |
| Koløyo Båthamn AS | Fitjar | 2023 |
| Komasi AS | Fjellhamar | 2025 |
| Kombi-Frakt AS | Sokna | 1997 |
| Kompani VI2 AS | Lier | 2021 |
| Kompis Invest AS | Dagali | 2005 |
| Kompis Transport AS | Sokna | 2020 |
| Komplett Flytt Og Vask AS | Arendal | 2026 |
| Komsa Parkering AS | Surnadal | 2006 |
| Konferansebussen AS | Årnes | 2020 |
| Kongsberg Bilberging AS | Kongsberg | 2007 |
| Kongsberg Containertransport AS | Skollenborg | 2000 |
| Kongsberg Kranservice AS | Skollenborg | 2007 |
| Kongsberg Maskintransport AS | Skollenborg | 2015 |
| Kongsberg Subs AS | Kongsberg | 2024 |
| Kongsberg Taxi AS | Kongsberg | 2007 |
| Kongsberg Transport AS | Kongsberg | 1993 |
| Kongsberg Tur Og Transport AS | Kongsberg | 2014 |
| Kongsberg.No Invest Limited | Kongsberg | 2024 |
| Kongsberg.No Taxi Limited Nuf | Kongsberg | 2024 |
| Kongsfjord Frakt AS | Vormedal | 2014 |
| Kongsgruppen AS | Kongsvinger | 2026 |
| Kongstein Eiendom AS | Horten | 2011 |
| Kongstein Holding AS | Horten | 2010 |
| Kongstein Transport AS | Horten | 2010 |
| Kongsten AS | Ås | 2016 |
| Kongsvinger Transport AS | Kongsvinger | 2015 |
| Kongsvinger Transportbyrå AS | Kongsvinger | 1997 |
| Konkurrenten.No AS | Evje | 1999 |
| Konnect Service AS | Kjeller | 2024 |
| Konterud Transport AS | Haslemoen | 1996 |
| Kontinent Transport AS | Sofiemyr | 1990 |
| Kontour AS | Frogner | 2024 |
| Kontrollert Atmosfære Lager Lier AS | Lier | 2000 |
| Koo Betongtransport AS | Torvastad | 2023 |
| Koo-Holding AS | Torvastad | 2023 |
| Kop Holding AS | Storebø | 2011 |
| Kopervik Ship Invest AS | Kopervik | 2002 |
| Kopervik Ship Management AS | Kopervik | 2000 |
| Kopervik Shipping AS | Kopervik | 1994 |
| Kopervik Taxi AS | Kopervik | 2025 |
| Kopitransport Bergen Ans | Bergen | 1997 |
| Kopperud Transport Og Anlegg AS | Hurdal | 2015 |
| Kopperud&Sønn Transport AS | Kløfta | 2012 |
| Kopperud-Transport AS | Dal | 2024 |
| Koprapojad Ou Nuf | Ee-50705 Tartu | 2020 |
| Kopstad Godsterminal AS | Spikkestad | 2005 |
| Korean Air Line Nuf | Gardermoen | 2009 |
| Kornsjø Dampskipsselskap SA | Kornsjø | 1999 |
| Korsvold Transport Da | Dimmelsvik | 2002 |
| Kosciuk Taxi Bil AS | Oslo | 2025 |
| Kotra Logistics Denmark Nuf | Dk-6330 Padborg | 2025 |
| Kotra Logistics Norway AS | Gardermoen | 2024 |
| KP Express AS | Oslo | 2025 |
| KP Transport AS | Sortland | 2006 |
| KPM Transport AS | Kvernaland | 2010 |
| KPT Transport Uab Nuf | Lt-29174 Anyksciu R. Sav. | 2025 |
| KR Salg & Utleie AS | Sørreisa | 2022 |
| KR Transport AS | Sortland | 2008 |
| KR1 Holding AS | Hvam | 2022 |
| Krabbodden Bryggelag SA | Flekkerøy | 2013 |
| Kraby Ekspress AS | Lena | 2023 |
| Kraft & Lothe Shipping AS | Haugesund | 1993 |
| Kraft Johanssen AS | Eide | 2023 |
| Kragerø Anleggservice AS | Sannidal | 2024 |
| Kragerø Expressen AS | Helle | 1994 |
| Kragerø Kran Og Transport AS | Helle | 1995 |
| Kragerø Parkering AS | Kragerø | 2019 |
| Kragerø Rib AS | Kragerø | 2007 |
| Kragerø Sjøtjenester AS | Kragerø | 2011 |
| Kragerø Taxi Da | Kragerø | 1996 |
| Kragerø Taxibåt AS | Jomfruland | 2013 |
| Kragerø Transportsentral AS | Skåtøy | 2013 |
| Krakk Transport AS | Øvre Vats | 2022 |
| Kran & Bodtransporter I Karlstad AB | 665 92 Kil | 2018 |
| Kran & Spesialløft AS | Lye | 2018 |
| Kran Og Transportservice AS | Sandefjord | 2019 |
| Kran Service AS | Askim | 2021 |
| Kranbilen AS | Egersund | 2022 |
| Kranbilhallingdal AS | Ål | 2009 |
| Kranbilservice AS | Oslo | 2024 |
| Kranbilutleie AS | Trondheim | 2001 |
| Kranmannen AS | Nedenes | 2019 |
| Kranmesteren AS | Sandefjord | 2019 |
| Kranringen AS | Skien | 1989 |
| Krasniq Team AS | Haugesund | 2020 |
| Krasof AS | Oslo | 2005 |