| Kraemer Maritime AS | Wholesale & retail | 1997 |
| Kraemer Maritime Holding AS | Wholesale & retail | 2002 |
| Kran & Marintek AS | Professional & scientific | 2006 |
| Krane AS | Real estate | 2000 |
| Krane Eiendom AS | Real estate | 2000 |
| Krane Galleri & Rammeverksted AS | Wholesale & retail | 1992 |
| Kreahvita AS | Professional & scientific | 2002 |
| Kreativ Vekst Da | Administrative & support | 2002 |
| Kreutzer Eiendom AS | Financial services | 2023 |
| Krhm Holding AS | | 2025 |
| Krikar AS | Agriculture & fishing | 2018 |
| Kriro Invest AS | Real estate | 2019 |
| Kristiansen & Co AS | Professional & scientific | 2026 |
| Kristin Bergheim AS | Manufacturing | 2019 |
| Kristina Antonsen Holding AS | | 2014 |
| Kroberg AS | Real estate | 2024 |
| Kroken Vest AS | Real estate | 2025 |
| Krto Invest AS | | 2025 |
| Kryos Form AS | Other services | 2012 |
| Krystallplaneten AS | Information & communication | 2017 |
| Kråkeslottet Barnehage SA | Education | 1982 |
| Kræmer AS | Wholesale & retail | 2018 |
| Kræmer Boligutleie AS | Real estate | 2025 |
| Kræmer Brygge Bolig AS | Real estate | 2007 |
| Kræmer Eiendom AS | Real estate | 2000 |
| Kræmer Holding AS | Real estate | 2019 |
| Kræmer Invest AS | Real estate | 2017 |
| Kræmer Parkeringsanlegg AS | Real estate | 2011 |
| Ksat Global AS | Information & communication | 2016 |
| KTV Group Troms Og Finnmark AS | Administrative & support | 2024 |
| Kubehus & Eiendom AS | Construction | 2024 |
| Kular Invest AS | Information & communication | 2018 |
| Kung Siam Cafe AS | Hospitality | 2011 |
| Kuttervika Brygge AS | Real estate | 2012 |
| Kvaal Production AS | Information & communication | 2017 |
| Kvaløysletta Eiendom AS | Real estate | 2015 |
| Kvaløyvegen 166/168 AS | Real estate | 2010 |
| Kvaløyveien 332 AS | Real estate | 2016 |
| Kvammen AS | Administrative & support | 2026 |
| Kvartal Langgaten AS | Real estate | 2022 |
| Kvasstind AS | Financial services | 2016 |
| Kveldrovegen Barnehage SA | Education | 1988 |
| Kveldstua Invest AS | Financial services | 2011 |
| Kvistad Elektronikk AS | Construction | 1985 |
| Kvit Eiendom AS | Real estate | 2017 |
| Kvitebjørn Varme AS | Energy | 1998 |
| Kvitfløy AS | | 2004 |
| Kvitholmen Holding AS | | 2024 |
| Kvitungen AS | Agriculture & fishing | 2004 |
| Kystens Hus AS | Real estate | 2012 |
| Kystens Mathus AS | Hospitality | 2014 |
| Kystens Tankesmie AS | Education | 2014 |
| L. Hansen Bygg AS | Construction | 2026 |
| La Lash AS | Other services | 2018 |
| La Manga Eiendom AS | Real estate | 2000 |
| La Speranza AS | Hospitality | 2005 |
| Labyrint Invest AS | | 2025 |
| Lagopus Finnvik AS | Real estate | 2007 |
| Lagopus Panorama AS | Real estate | 2007 |
| Lagspill AS | Information & communication | 2020 |
| Lajla Invest AS | | 2026 |
| Lama Opportunities AS | Professional & scientific | 2020 |
| Lan Paulsen Bilverksted AS | Other services | 2023 |
| Lance AS | Agriculture & fishing | 2017 |
| Langenes Interiør Ans | Wholesale & retail | 1989 |
| Langfredag AS | Hospitality | 2023 |
| Langgata Pluss AS | Real estate | 2025 |
| Langnes Bilvask AS | Other services | 2013 |
| Langnes Eiendom AS | Real estate | 2023 |
| Langnes Kjøkken AS | Wholesale & retail | 2018 |
| Langnes Legesenter AS | Health & social care | 1998 |
| Langnes Restaurantdrift AS | Hospitality | 2022 |
| Langnes Utvikling AS | Real estate | 2015 |
| Langnes VVS Butikk AS | Construction | 2017 |
| Langnesporten AS | Real estate | 2021 |
| Lapon AS | | 2020 |
| Laranja AS | Wholesale & retail | 2015 |
| Larjo AS | Administrative & support | 2014 |
| Larren Invest AS | | 2021 |
| Larsneset Holding AS | Real estate | 2021 |
| Larsneset Utbygging AS | Real estate | 2020 |
| Lashes by Vik AS | Other services | 2017 |
| Lasse Alstad AS | Real estate | 2016 |
| Laukwiik Invest AS | Health & social care | 2020 |
| Lauritzen & Lauritzen AS | Construction | 2016 |
| Laval Utvikling AS | Professional & scientific | 2011 |
| Lavold Invest AS | Real estate | 2005 |
| Lavon AS | Real estate | 2015 |
| Lawo Invest AS | Real estate | 2005 |
| LBN Holding AS | | 2022 |
| Leagus Da | Arts & recreation | 2022 |
| Leander Eiendom Tromsø AS | Real estate | 2025 |
| Leanyard AS | Information & communication | 2017 |
| Ledelse I Nord KSK AS | Professional & scientific | 2000 |
| Lefort Holding AS | | 2024 |
| Lege Eldrid Liljedal AS | Health & social care | 2012 |
| Lege Jorid Degerstrøm AS | Health & social care | 2017 |
| Lege Karoline Esperø AS | Health & social care | 2023 |
| LEGEKLINIKK1 AS | Professional & scientific | 2018 |
| Legendary Adventure AS | Administrative & support | 2018 |