| Komponisten Frisørsalong AS | Other services | 1995 |
| Komsult AS | Professional & scientific | 2023 |
| Kondisfabrikken AS | Education | 2011 |
| Kongens 20 AS | Real estate | 1995 |
| Kongens 28 AS | Real estate | 2018 |
| Kongens Gate 60 AS | Real estate | 2020 |
| Kongens Kjeller AS | Real estate | 2018 |
| Kongens Verft Eiendom AS | Real estate | 2025 |
| Kongens Verv AS | Real estate | 2004 |
| Kongensgate 11 Eiendom AS | Real estate | 1986 |
| Kongensgate 2 Kristiansand AS | Real estate | 2016 |
| Kongensgate 32 Kristiansand AS | Real estate | 2006 |
| Kongensgate 62 AS | Real estate | 2011 |
| Kongensgate 66 Og 68 AS | Real estate | 2011 |
| Kongensgate Skole AS | Real estate | 2015 |
| Kongsgaard AS | Real estate | 2002 |
| Kongsgård Alle 62 AS | Real estate | 2011 |
| Kongsgård AS | Real estate | 1994 |
| Kongsgård Bygg AS | Construction | 2019 |
| Kongsgård Holding AS | Hospitality | 2008 |
| Kongsgård Park AS | Real estate | 2016 |
| Kongsgård Utemiljø AS | Construction | 2019 |
| Kongshav AS | Agriculture & fishing | 2019 |
| Kongshavn Øst AS | Real estate | 2014 |
| Kongsvard AS | Agriculture & fishing | 2019 |
| Kongsøy AS | Agriculture & fishing | 2019 |
| Koni Holding AS | | 2021 |
| Konseptkontoret AS | Professional & scientific | 2019 |
| Konsulentas AS | Education | 2007 |
| Konsulenten AS | Professional & scientific | 1993 |
| Kontainer AS | Professional & scientific | 2017 |
| Kontakte AS | Information & communication | 2026 |
| KONTOR1 AS | Administrative & support | 2019 |
| Kontordamene AS | Administrative & support | 2016 |
| Kontorleverandøren Kristiansand AS | | 1992 |
| Kool Produktion AS | Information & communication | 1996 |
| Kopianstalten AS | Manufacturing | 2004 |
| Korrupt AS | Arts & recreation | 2023 |
| Korsmo & Tønnessen AS | Real estate | 2026 |
| Korsvik Bensin & Service Da | Real estate | 1995 |
| Korsvik Bilverksted AS | Other services | 2005 |
| Korsvik Brygge AS | Real estate | 2005 |
| Korsvik Invest AS | Wholesale & retail | 2007 |
| Korsvik Marina AS | Wholesale & retail | 2013 |
| Kosmos Klubb AS | Hospitality | 2025 |
| Kosnor AS | Wholesale & retail | 2017 |
| Kosseviga AS | Real estate | 2019 |
| Kosvika Vann Og Avløp SA | Real estate | 2014 |
| Kpgf AS | Real estate | 2022 |
| KR Frisør AS | Other services | 2021 |
| Krabberød AS | Professional & scientific | 2014 |
| Kraft Anlegg AS | Construction | 2023 |
| Krag AS | Wholesale & retail | 2013 |
| Krag Bolig AS | Real estate | 2011 |
| Krag Bygg AS | Construction | 2012 |
| Krag Gruppen AS | Real estate | 2009 |
| Kragh AS | Real estate | 2021 |
| Kran & Automasjon AS | Manufacturing | 2018 |
| Kran & Automasjon Eiendom AS | Real estate | 2021 |
| Kran & Automasjon Holding AS | Real estate | 2021 |
| Kran Engineering AS | Professional & scientific | 2025 |
| Krayem AS | Wholesale & retail | 2022 |
| KRD Invest AS | Financial services | 2016 |
| Kre-All AS | | 2025 |
| Kreathilde AS | Professional & scientific | 2021 |
| Kreative Kids AS | Wholesale & retail | 2026 |
| Kreativt. AS | Professional & scientific | 2015 |
| Kreatør AS | Information & communication | 1997 |
| Kremmerloftet AS | Wholesale & retail | 2016 |
| KRG Vakthold AS | Administrative & support | 2013 |
| Kri Invest AS | Real estate | 1965 |
| Kria AS | Other services | 2016 |
| Krigu AS | Administrative & support | 2017 |
| Krill AS | Wholesale & retail | 2008 |
| Krishnan Consulting AS | Professional & scientific | 2021 |
| Krisko Invest AS | | 2025 |
| Krisko Medical AS | Wholesale & retail | 2025 |
| Kriss Consulting AS | Construction | 2021 |
| Kristen Gulbrandsen Holding AS | | 2025 |
| Kristian 4 Des Gate 19 AS | Real estate | 2014 |
| Kristian 4DES Gate Utbygging AS | Construction | 2016 |
| Kristian IV Eiendom AS | Real estate | 2020 |
| Kristian IV Gate 34 AS | Real estate | 2013 |
| Kristian Ivs G 17 AS | | 1950 |
| Kristian Sollie Eierselskap AS | | 2023 |
| Kristian Sollie Holding AS | Construction | 2016 |
| Kristian Speaking AS | Arts & recreation | 2022 |
| Kristians Eiendom AS | Real estate | 2017 |
| Kristians Holding AS | Real estate | 2017 |
| Kristiansand Akupunkturklinikk AS | Health & social care | 2016 |
| Kristiansand Andelslandbruk SA | Agriculture & fishing | 2017 |
| Kristiansand Auto AS | Wholesale & retail | 2025 |
| Kristiansand Auto Care AS | Other services | 2016 |
| Kristiansand Autoshine Ans | | 1993 |
| Kristiansand Bad AS | Construction | 2018 |
| Kristiansand Bil AS | Wholesale & retail | 2020 |
| Kristiansand Bilsenter AS | Wholesale & retail | 2024 |
| Kristiansand Bilverksted AS | Other services | 2006 |
| Kristiansand Boligservice AS | Administrative & support | 2024 |
| Kristiansand Bygg & Vedlikehold AS | Construction | 2019 |