| Kredittopplysningen AS | Administrative & support | 2005 |
| Kredittpartner AS | Administrative & support | 2008 |
| Kreftforeningen Livskraft AS | Arts & recreation | 2002 |
| Krefting Agenturer AS | Wholesale & retail | 2014 |
| Kreftings Gate 33 AS | Real estate | 1925 |
| Kreftklinikken AS | Health & social care | 2020 |
| Krekling Holding AS | | 2023 |
| Krekling Invest AS | Real estate | 2005 |
| Kreklingveien 10 AS | Real estate | 2015 |
| Kremco AS | Real estate | 2023 |
| Kremmartunet Kjøpesenter Eiendom AS | Real estate | 1974 |
| Kremmergaarden Holding AS | Real estate | 2018 |
| Kremmergaarden Invest AS | Financial services | 2018 |
| Kremmerhuset Ting & Sånt AS | Wholesale & retail | 1995 |
| Kreno AS | Construction | 2015 |
| Kreppingdalen Kraftverk AS | Energy | 2018 |
| Kresko 360 AS | Education | 2017 |
| Kresko Invest AS | Financial services | 2016 |
| Krespo AS | Professional & scientific | 1998 |
| Kretareiser Ans | Administrative & support | 2006 |
| Kreth AS | Professional & scientific | 2023 |
| Kreti Og Pleti Invest AS | Professional & scientific | 2001 |
| Krets AS | Information & communication | 2019 |
| Kretsløpet AS | Information & communication | 2001 |
| Kreutz&Co AS | Real estate | 2015 |
| Krey Invest AS | | 2011 |
| Kreyberg Holding AS | Professional & scientific | 2022 |
| KRH AS | Professional & scientific | 2015 |
| Kri Investimentos AS | Professional & scientific | 2017 |
| KRI10 AS | Real estate | 2025 |
| KRI18 AS | Real estate | 2025 |
| Kria Holding AS | Information & communication | 2018 |
| Kriale Invest AS | | 2019 |
| Krib Invest AS | | 2026 |
| Kribbie AS | | 2024 |
| Kribeco AS | Information & communication | 2018 |
| Kriberg Invest AS | Professional & scientific | 2024 |
| Kribo AS | Wholesale & retail | 2012 |
| Kriborg Invest AS | Real estate | 2021 |
| Krico AS | Real estate | 2009 |
| Krico Invest AS | | 2000 |
| Kricon AS | Professional & scientific | 2020 |
| Krida Invest AS | | 2019 |
| Krieg Invest AS | | 2018 |
| Kriemer Holding AS | | 2023 |
| Krifa | Other services | 2007 |
| Krigers Holding AS | | 2026 |
| Krigsvoll Invest AS | | 2023 |
| Kriha AS | Professional & scientific | 2018 |
| Krihag Invest AS | | 2023 |
| Kriher Invest AS | Financial services | 2016 |
| Kriise AS | Information & communication | 2015 |
| Kriise Film AS | Information & communication | 2025 |
| Krikrantz AS | | 2025 |
| Krilia AS | | 2018 |
| Krillbite Studio AS | Information & communication | 2011 |
| Krima Regnskap AS | Professional & scientific | 2003 |
| Krimag Invest AS | | 2018 |
| Krimat AS | Professional & scientific | 2021 |
| Krimforum AS | Information & communication | 2020 |
| Krimkampen AS | Administrative & support | 2016 |
| Krimol AS | Administrative & support | 2020 |
| Krine AS | Administrative & support | 2025 |
| Kring Holding AS | | 2022 |
| Kringkastingshuset AS | | 2021 |
| Kringkollen Garasjelag SA | Real estate | 1970 |
| Kringkollen II SA | Real estate | 2017 |
| Kringla Invest AS | | 2021 |
| Kringle Film AS | Information & communication | 2020 |
| Kringlebakken AS | | 2018 |
| Kringlevollen AS | Professional & scientific | 2020 |
| Kringsjaa Norge AS | Wholesale & retail | 2016 |
| Kringsjåklinikken Da | Health & social care | 2010 |
| Kringsjånett SA | Information & communication | 1981 |
| Kringsjåvegen 188 AS | Real estate | 2015 |
| Kringstadvegen 1 AS | Real estate | 2015 |
| Krinidal Holding AS | Real estate | 2009 |
| Krino Invest AS | Real estate | 1997 |
| Krinor AS | Wholesale & retail | 1995 |
| Kris Bygg AS | Construction | 2017 |
| Kris Lillejord AS | Wholesale & retail | 2010 |
| Kris-Pol AS | Construction | 2008 |
| Krisarch AS | Professional & scientific | 2005 |
| Krisb Holding AS | Financial services | 2016 |
| Krisco Holding AS | Financial services | 2005 |
| Krise Records AS | Professional & scientific | 2025 |
| Krisekassen AS | | 2024 |
| Krisesikker.No AS | Wholesale & retail | 2025 |
| Krisestøtte AS | Education | 2025 |
| Krisho Holding AS | Wholesale & retail | 2022 |
| Kriskim AS | Real estate | 2001 |
| Krisko Eiendom AS | Real estate | 1985 |
| Krisko Norge AS | Wholesale & retail | 1995 |
| Kriskram AS | | 2022 |
| Krismar Holding AS | Financial services | 2018 |
| Krisno Invest AS | Financial services | 2015 |
| Krisny AS | | 2018 |
| Krisol Holding AS | | 2025 |
| Krissil AS | Financial services | 2018 |
| Krisslovesfood AS | Professional & scientific | 2024 |