| Kako Bygg Management AS | Real estate | 2002 |
| Kako Invest AS | Real estate | 2005 |
| Kallerudlia 3 AS | Real estate | 2012 |
| Kallerudsvingen 6 AS | Real estate | 2020 |
| Kallerudsvingen 9 AS | Real estate | 1987 |
| Kanpai Eiendom AS | | 2025 |
| Kapp Tomteutvikling AS | Real estate | 2013 |
| Karina Og Espen's Hjemmeservice Ans | Health & social care | 2006 |
| Karl Bratlie AS | Other services | 2025 |
| Karl Even Lande Holding AS | Financial services | 2013 |
| Karlsson Brødbakst AS | Manufacturing | 2025 |
| Kaskab AS | Real estate | 2017 |
| Kasto Invest AS | | 2018 |
| Kazemi Invest AS | | 2025 |
| Kazmak AS | Construction | 2021 |
| KB Pharma AS | Professional & scientific | 2025 |
| KBC Holding AS | | 2025 |
| KC Finans AS | Real estate | 2021 |
| Kebab Express AS | Hospitality | 2025 |
| Keep Moving AS | Professional & scientific | 2024 |
| Keli AS | Wholesale & retail | 1993 |
| Kelias Holding AS | | 2022 |
| Kensve Holding AS | | 2025 |
| KH Glass AS | Wholesale & retail | 2019 |
| Khoff AS | Health & social care | 2014 |
| Khojasteh Holding AS | Professional & scientific | 2023 |
| Kiil Eiendom AS | Real estate | 2020 |
| Kiil Interiørdesign AS | Wholesale & retail | 1994 |
| Kilde Eiendom Ans | Real estate | 2001 |
| Kimsa Eiendom AS | Real estate | 2020 |
| Kirkerottene AS | Arts & recreation | 2024 |
| Kiropraktor Gjøvik AS | Health & social care | 2015 |
| Kiropraktor Stein Tore Narten AS | Health & social care | 2007 |
| Kiropraktor Øyvind Løkken AS | Health & social care | 2020 |
| Kirsten Onsrud Holding AS | Real estate | 2005 |
| Kjedeservice AS | Wholesale & retail | 2000 |
| Kjelleren Disco - Bar Da | Hospitality | 2007 |
| Kjelsrud Herre AS | Wholesale & retail | 2001 |
| Kjelstad Eiendom AS | Real estate | 2020 |
| KJR Consult AS | Professional & scientific | 2005 |
| Kjøkkendrift No 1 Gjøvik AS | Wholesale & retail | 2012 |
| Kjøkkenhuset AS | Wholesale & retail | 2018 |
| Kjølberggata Eiendom AS | Real estate | 2001 |
| Klartilbruk AS | Real estate | 2019 |
| Klekke Invest AS | | 2019 |
| Kleppe Frisør AS | Other services | 2018 |
| Kleppes Eiendom AS | Real estate | 2000 |
| Klett AS | Real estate | 2021 |
| Klinevo AS | Health & social care | 2018 |
| Km-Maskin AS | Wholesale & retail | 2021 |
| Knowholding AS | | 2023 |
| Knut Malmberg AS | Construction | 1984 |
| Koan Kran AS | Administrative & support | 2017 |
| Kobolt Printshop AS | Manufacturing | 2016 |
| Kodeo AS | Information & communication | 2017 |
| Kodetid AS | Information & communication | 2019 |
| Kollin Da | Wholesale & retail | 2007 |
| Kondis 24 Fastland AS | Arts & recreation | 2001 |
| Kontoret Vinbar AS | Hospitality | 2025 |
| Kontrollutvalgstjenester AS | Administrative & support | 2015 |
| Kontrollveien 3 AS | Real estate | 2016 |
| Kontur Arkitekter AS | Professional & scientific | 2005 |
| Kopperud Auto Senter AS | Wholesale & retail | 2000 |
| Korse AS | Professional & scientific | 2000 |
| Kraagebakk Holding AS | | 2024 |
| Krabyskogen Lagerseksjoner AS | Real estate | 2025 |
| Kreare AS | Real estate | 2024 |
| Kringens Gate 5 AS | Real estate | 2015 |
| Kristiansen Mat AS | Manufacturing | 2020 |
| Kristiansen Mat Eiendom AS | Real estate | 2013 |
| Kriwa Holding AS | Wholesale & retail | 2005 |
| Krokstadskogen I AS | Real estate | 2006 |
| Krokstadskogen II AS | Real estate | 2006 |
| Krokstadskogen III AS | Real estate | 2006 |
| Krokstadskogen IV AS | Real estate | 2012 |
| Krokstadskogen V AS | Real estate | 2010 |
| Kropp Og Helseklinikken AS | Health & social care | 2005 |
| Kruttsterk AS | Hospitality | 2020 |
| Kråkejordet Kiosk Og Gatekjøkken Da | Hospitality | 1990 |
| Kvartal 10 AS | Real estate | 2010 |
| Kvartal 25 Gjøvik AS | Real estate | 2017 |
| Kvernvold Holding AS | Arts & recreation | 2023 |
| KVIK1 Invest AS | | 2022 |
| KVIK2 Invest AS | | 2020 |
| Kvikstad & SP Rådgivning AS | Professional & scientific | 2025 |
| Kvila Invest AS | Financial services | 2005 |
| Kvinneakademiet Da | Education | 2006 |
| Kvinnehelseklinikken Osteopati & Fysioterapi AS | Health & social care | 2025 |
| Kvisgårdshjørnet Eiendom AS | Real estate | 2017 |
| Kvæntin AS | Arts & recreation | 2017 |
| Kåre Frydenlund Holding AS | Financial services | 2015 |
| L Gullhagen AS | Wholesale & retail | 1979 |
| Lafo AS | Administrative & support | 2014 |
| Lagerflyt AS | Professional & scientific | 2014 |
| Lakenet AS | Information & communication | 1995 |
| Land Og Strand AS | Construction | 2007 |
| Landbruksvegen 3 A/B AS | Real estate | 2021 |
| Landro Gruppen Holding AS | | 2025 |
| Lanjopoulos Familiekiropraktikk AS | Health & social care | 2015 |
| Lankaloitte AS | | 2023 |