| Kammerherreløkka Næring B1 AS | Professional & scientific | 2007 |
| Kammis Grill 2 AS | Hospitality | 2025 |
| Kammis Grill AS | Hospitality | 2022 |
| Kamo Learning Da | Wholesale & retail | 2019 |
| Kamonen Eiendom AS | Real estate | 2021 |
| Kamonen Holding AS | Real estate | 2020 |
| Kamons AS | Professional & scientific | 2020 |
| Kampanje Invest AS | Information & communication | 2022 |
| Kampanje Media AS | Information & communication | 2019 |
| Kampas AS | | 2019 |
| Kampea AS | | 2022 |
| Kampedalen Invest AS | | 2022 |
| Kampen Apartments and Hotell AS | Hospitality | 2013 |
| Kampen Arkitektlag SA | Professional & scientific | 2021 |
| Kampen AS | Real estate | 2008 |
| Kampen Bistro AS | Hospitality | 2001 |
| Kampen Bolig- Og Næringseiendom AS | Real estate | 2005 |
| Kampen Brinken AS | Real estate | 2018 |
| Kampen Bydelshus SA | Real estate | 1982 |
| Kampen Hotel AS | Real estate | 2013 |
| Kampen Installasjon AS | Construction | 1999 |
| Kampen Kaffebar AS | Hospitality | 2015 |
| Kampen Kaffebar Eiendom AS | Real estate | 2018 |
| Kampen Kolonial AS | Wholesale & retail | 2020 |
| Kampen Properties AS | Hospitality | 2022 |
| Kampen Rør Service AS | Construction | 2025 |
| Kampen Saga Antirust AS | Other services | 2015 |
| Kampen Vinyl AS | Wholesale & retail | 2022 |
| Kampens Byggeselskap AS | Households | 1933 |
| Kampens Lagerhaller AS | Real estate | 1939 |
| Kampetin AS | | 2025 |
| Kamphaug Invest AS | | 2020 |
| Kamran Frisør AS | Other services | 2022 |
| Kamrat AS | Professional & scientific | 2023 |
| Kamrik Holding AS | Financial services | 2005 |
| Kamrk Holding AS | | 2021 |
| Kams AS | Real estate | 2005 |
| Kamsarmax 3 AS | Transport & logistics | 2025 |
| Kamsarmax 4 AS | Transport & logistics | 2025 |
| Kamsarmax 5 AS | Transport & logistics | 2026 |
| Kamsin Invest AS | Financial services | 2016 |
| Kamstrup AS | Wholesale & retail | 2002 |
| Kamude AS | Professional & scientific | 2016 |
| Kamy Kommunikasjon AS | Information & communication | 2011 |
| Kamy Total AS | Information & communication | 2023 |
| Kamøy Enterprises AS | Health & social care | 1994 |
| Kamøy Holdings AS | | 2015 |
| Kan AS | | 2026 |
| Kan Eiendom AS | | 2005 |
| Kan Finans AS | Information & communication | 2013 |
| Kan Invest AS | | 2024 |
| Kan Investments Limited Nuf | | 2007 |
| Kan Renhold AS | Administrative & support | 2005 |
| Kan Renhold Oslo AS | Administrative & support | 1996 |
| Kan-Gruppen AS | Financial services | 1985 |
| Kan-Lack I Jönköping AB | Administrative & support | 2010 |
| Kanaan Da | Arts & recreation | 2021 |
| Kanada III AS | Financial services | 2013 |
| Kanada V AS | Financial services | 2013 |
| Kanak AS | Construction | 2015 |
| Kanal 10 Norge AS | Information & communication | 2017 |
| KANAL7 SA | Information & communication | 2016 |
| Kanalarmen 12 Forus AS | Real estate | 2018 |
| Kanalarmen 20 AS | Real estate | 2018 |
| Kanalbredden AS | Real estate | 2005 |
| Kanalbredden Holding AS | Real estate | 2007 |
| Kanalbredden Tomt AS | Real estate | 2021 |
| Kanalferie AS | Hospitality | 2010 |
| Kanalsletta 8 Holding AS | Real estate | 2020 |
| Kanalsletta AS | Real estate | 2011 |
| Kanalsletta Holding AS | Real estate | 2010 |
| Kanalveien 105 AS | Real estate | 2005 |
| Kanalveien 2 AS | Real estate | 2007 |
| Kanalveien 3 Næringsbygg AS | Real estate | 2016 |
| Kanalveien 51-53 AS | Real estate | 2020 |
| Kanalveien Utvikling AS | Real estate | 2019 |
| Kanatago AS | Information & communication | 2026 |
| Kanck Holding AS | Wholesale & retail | 2019 |
| Kancks Invest AS | | 2025 |
| Kandamos Digital Group Limited | Real estate | 2021 |
| Kandi Invest Management AS | Financial services | 2012 |
| Kandiah AS | Wholesale & retail | 2019 |
| Kanel AS | | 2025 |
| Kanelous AS | Real estate | 2020 |
| Kanexto AS | Information & communication | 2023 |
| Kangaroo Bidco AS | Information & communication | 2023 |
| Kangaroo Finco AS | Information & communication | 2023 |
| Kangaroo Holdco AS | Information & communication | 2023 |
| Kangaroo Manco 2 AS | Financial services | 2024 |
| Kangaroo Manco 3 AS | Financial services | 2024 |
| Kangaroo Manco 4 AS | | 2024 |
| Kangaroo Manco Holding AS | | 2024 |
| Kangaroo Midco AS | Information & communication | 2023 |
| Kanh AS | Hospitality | 2017 |
| Kanhotel Ans | Information & communication | 2001 |
| Kanhotel Limited Nuf | Information & communication | 2007 |
| Kani Consulting AS | Wholesale & retail | 1999 |
| Kani Eiendom AS | Real estate | 1995 |
| Kanic AS | | 2026 |
| Kanima AS | | 2021 |