| Jaho Mur Holding AS | Construction | 2021 |
| Jaho Mur Og Fasade AS | Construction | 2020 |
| Jakobsen-Invest AS | Real estate | 2006 |
| Jannes Eiendom AS | Real estate | 2022 |
| Jannes Invest AS | Hospitality | 2022 |
| Javel Trafikkskole AS | Education | 2025 |
| JB Sangvik Invest AS | | 2021 |
| JDD Utstyr AS | Wholesale & retail | 2022 |
| Jens Småjobber AS | Health & social care | 2023 |
| Jensen-Lunde Invest AS | Financial services | 2005 |
| Jeppi AS | Wholesale & retail | 2013 |
| JGL Holding AS | | 2025 |
| Jifou AS | Professional & scientific | 2011 |
| JK Eiendomsselskap AS | Real estate | 2020 |
| JK Mur Og Betong AS | Construction | 2026 |
| Jlinvest AS | Information & communication | 2022 |
| Johansen Maskin & Sånn AS | Construction | 2023 |
| Jojo Production AS | Information & communication | 2021 |
| Jon Kristensen Invest AS | Other services | 2020 |
| Jonas Aamodt Invest AS | | 2024 |
| Jonas Aasbø Invest AS | | 2025 |
| Joranova AS | Professional & scientific | 2014 |
| Jose Holding AS | Professional & scientific | 2023 |
| K Bakke AS | Real estate | 2022 |
| K Trysnes AS | Real estate | 2005 |
| K&K Hage Art Da | Professional & scientific | 2023 |
| K-Aa Eiendom AS | Real estate | 2013 |
| K-Heggland Holding AS | | 2023 |
| K-Nilsen AS | Professional & scientific | 2016 |
| K.T. Brøvig Invest AS | Real estate | 2007 |
| KA11 Holding 1 AS | | 2025 |
| Kadlubowska AS | Administrative & support | 2023 |
| Kai Gimre AS | Financial services | 2016 |
| Kaketine AS | Manufacturing | 2025 |
| Kamerat Tofteland AS | Education | 2007 |
| Kami AS | Wholesale & retail | 2010 |
| Kami Eiendom 2 AS | Real estate | 2026 |
| Kami Eiendom AS | Real estate | 2021 |
| Karlswagen AS | | 2026 |
| Kartheia Fem AS | Real estate | 2017 |
| Kask Invest AS | | 2026 |
| Kefka AS | Information & communication | 2023 |
| Kelsel AS | Financial services | 2021 |
| Kenneth Knutsen AS | Real estate | 2016 |
| Kerlefsen Bygg AS | Construction | 2021 |
| Kerlefsen Eiendom AS | Construction | 2026 |
| Kerlefsen Holding AS | Construction | 2026 |
| Kerlefsen Invest AS | Construction | 2026 |
| Kerlefsen Malermester AS | Construction | 1983 |
| Kimmo AS | Professional & scientific | 2025 |
| Kinotomten AS | Real estate | 2008 |
| Kirodan AS | Health & social care | 2013 |
| Kiropraktor Marion Severinsen AS | Health & social care | 2021 |
| Kjelland Kiropraktikk AS | Health & social care | 2020 |
| Kjellandsheia AS | Real estate | 2012 |
| Kjesken Kiosk AS | Hospitality | 2022 |
| Kjkapital AS | | 2023 |
| Kjkapital II AS | | 2023 |
| Kjst Invest AS | | 2019 |
| Kjær Maskin Og Transport AS | Construction | 2019 |
| Kjøpmannskjær Eiendom AS | Real estate | 2007 |
| Kjøstvedt Holding AS | | 2025 |
| Kjøstvedt Invest AS | | 2022 |
| KK Medic AS | Education | 2022 |
| Klampen AS | Financial services | 2017 |
| Kleivsetveien 333 AS | Real estate | 2022 |
| Klepland AS | Real estate | 2013 |
| Kleplandsveien 1 AS | Real estate | 1994 |
| Klungland Utleie AS | Construction | 2019 |
| Knuden AS | Real estate | 2022 |
| Kolskeggur AS | Real estate | 2022 |
| Kommunikasjonsplattformen AS | | 2026 |
| Kommuniko AS | Professional & scientific | 2017 |
| Kongsgård Allé 37 AS | Real estate | 2018 |
| Kongsgård Eiendom AS | Real estate | 2009 |
| Kontinental Maskinservice AS | Manufacturing | 1997 |
| Kontor Nyquist AS | Professional & scientific | 2019 |
| Kri Kapital AS | | 2026 |
| Kristian a Skeie AS | Wholesale & retail | 2024 |
| Kristiansand Bruktbåt AS | Manufacturing | 2015 |
| Kristiansand Hjertepraksis DR. P.S.Munk AS | Health & social care | 2020 |
| Kristiansand Minilager AS | Real estate | 2025 |
| KRM Invest AS | Financial services | 2008 |
| Krogan Holding AS | | 2026 |
| Krop AS | Administrative & support | 2014 |
| Ksmv AS | Manufacturing | 1993 |
| Ksund Invest AS | | 2020 |
| KTL Holding AS | | 2023 |
| Kurt Andresen AS | Manufacturing | 2024 |
| Kvernstien Invest AS | | 2020 |
| Kysttradisjoner Da | Wholesale & retail | 2011 |
| La Bonita Da | Wholesale & retail | 1996 |
| La-Sa Marine AS | Manufacturing | 1998 |
| Ladest AS | Real estate | 2012 |
| Lambra Askelion AS | Real estate | 2024 |
| Lampedeler AS | Wholesale & retail | 2025 |
| Landbruksprodukter Benestad Ans | Wholesale & retail | 1991 |
| Lars Andersen Legevirksomhet AS | Health & social care | 2018 |
| Larsen Og Sønn AS | Real estate | 2022 |
| LB Music AS | Arts & recreation | 2022 |