| Kjøhl Nodeland Dental AS | Health & social care | 2017 |
| Kjøita 18 AS | Real estate | 2013 |
| Kjøita 40 AS | Real estate | 2009 |
| Kjøita 42 AS | Real estate | 2013 |
| Kjøita 6 AS | Real estate | 1999 |
| Kjøita Consult AS | Professional & scientific | 2020 |
| Kjøita Eiendom AS | Real estate | 2019 |
| Kjøita Invest AS | Real estate | 2008 |
| Kjøita Næring AS | Real estate | 2012 |
| Kjøkkendrift No 1 Vågsbygd AS | Wholesale & retail | 2015 |
| Kjøkkenhuset Sørlandsparken AS | Real estate | 2006 |
| Kjøkkenskapet AS | Hospitality | 2008 |
| Kjøpmann Hofstad AS | Wholesale & retail | 2026 |
| Kjøpmann Vik AS | Wholesale & retail | 2011 |
| Kjørbekkdalen 19 Invest AS | Real estate | 2020 |
| Kjørfint Trafikkskole AS | Education | 2013 |
| Kjøstvedt Sørlandssenteret AS | Wholesale & retail | 1988 |
| KK Holding AS | Real estate | 2005 |
| KK Utleie AS | Construction | 2023 |
| KKP1 AS | Real estate | 2026 |
| Kkø Eiendom AS | Real estate | 2017 |
| KL Adviser AS | Professional & scientific | 2018 |
| Klappet & Klart AS | Professional & scientific | 2025 |
| Klartnet AS | Information & communication | 2026 |
| Klatresteinen Eiendom AS | Real estate | 2016 |
| Klauset AS | Professional & scientific | 2018 |
| Klauset Holding AS | Professional & scientific | 2018 |
| Kleiveland Eiendom AS | Manufacturing | 2002 |
| Kleiveland Invest AS | Manufacturing | 2017 |
| Klementin AS | Real estate | 2022 |
| Klementin Eiendom AS | Real estate | 2022 |
| Klementin K20 AS | Real estate | 2020 |
| Kleppenhus Invest AS | Financial services | 2016 |
| Klepsland AS | Professional & scientific | 2017 |
| Klesim AS | | 2025 |
| Kleveland AS | Construction | 1996 |
| Kleveland Holding AS | Construction | 2005 |
| Klimafisk AS | Professional & scientific | 2025 |
| Klimpen Invest AS | | 2023 |
| Klinikk Andøya AS | Health & social care | 2009 |
| Klinikk Matis AS | Other services | 2012 |
| Klinikk Nyhud AS | Health & social care | 2020 |
| Klinisk Invest AS | | 2026 |
| Kloss AS | Professional & scientific | 2005 |
| Klouman Holding AS | Real estate | 2020 |
| KLS Drift AS | Health & social care | 2018 |
| Klse AS | Real estate | 1991 |
| Klubb Kosmos Da | Arts & recreation | 2022 |
| Klubben Nos | Other services | 1979 |
| Klubben Servering AS | Hospitality | 2022 |
| Klubbkonsulenten AS | Professional & scientific | 2018 |
| Klynga Holding AS | Real estate | 2011 |
| Klynga Invest AS | Real estate | 2005 |
| KM - Invest AS | | 2006 |
| KM Hegelstad Holding AS | Health & social care | 2020 |
| KM Henriksen Holding AS | | 2022 |
| Kmmh Eiendom AS | Real estate | 2023 |
| KN Beauty AS | Other services | 2021 |
| Knag IT AS | Information & communication | 2019 |
| Knarrevikveien AS | Real estate | 2012 |
| Knarviga Holding AS | Real estate | 2016 |
| Knas Eiendom AS | Real estate | 2018 |
| Knes Eiendom AS | Real estate | 2021 |
| Knes Holding AS | Real estate | 2021 |
| Knif Regnskap AS | Professional & scientific | 1995 |
| Knight Engineering AS | Professional & scientific | 2011 |
| Knot Holding AS | | 2022 |
| Knotto AS | Professional & scientific | 2012 |
| Knugis AS | | 2026 |
| Knut & Bjørn Trading Da | Wholesale & retail | 1995 |
| Knut Havn Holding AS | | 2022 |
| Knutsen Eiendom AS | Real estate | 2000 |
| Knutson AS | Real estate | 2009 |
| Knutson Invest AS | Construction | 2013 |
| Koa Invest AS | Real estate | 2011 |
| Koa Personal AS | Administrative & support | 2021 |
| Koba-Vets AS | Professional & scientific | 2018 |
| Kobbel Kunstbyrå AS | Professional & scientific | 2022 |
| Kobberveien Utvikling AS | | 2015 |
| Kocons AS | Professional & scientific | 2011 |
| Kodepartner AS | Information & communication | 2019 |
| Kodnet AS | Information & communication | 2020 |
| Kogarashi AS | Professional & scientific | 2022 |
| Koj Consulting AS | Professional & scientific | 2005 |
| Koja Invest AS | | 2022 |
| Kokap Sør AS | Professional & scientific | 2026 |
| Kokkimgården AS | Real estate | 2012 |
| Kokstad 1 AS | Real estate | 2011 |
| Kol AS | Education | 2002 |
| Kola Eiendom AS | Real estate | 1997 |
| Kolbø Eiendom AS | Real estate | 2012 |
| Kolibrid Holding AS | | 2020 |
| Kollab AS | Professional & scientific | 2023 |
| Kollektivet AS | Wholesale & retail | 2019 |
| Kollstad AS | Information & communication | 2008 |
| Kolstad Holding AS | | 2005 |
| Kolstad-Eiendom AS | Real estate | 2007 |
| Komform AS | Professional & scientific | 2026 |
| Kompetanse I Sør AS | Education | 2002 |
| Kompetent Personell AS | Administrative & support | 2013 |