| Kongsvegen 3 Eiendom AS | Real estate | 1998 |
| Kongsvegen 5 Eiendom AS | Real estate | 2014 |
| Kongsveien 104 AS | Real estate | 2005 |
| Kongsveien 15 AS | Real estate | 2013 |
| Kongsveien 30 AS | Real estate | 2002 |
| Kongsveien Barnehage AS | Education | 1987 |
| Kongsveien Eiendom AS | Real estate | 2019 |
| Kongsvinger Automation AS | Professional & scientific | 2013 |
| Kongsvinger Eiendomsinvest AS | Real estate | 2021 |
| Kongsvinger Handelspark AS | Real estate | 1988 |
| Kongsvingerveien 27 AS | Real estate | 2015 |
| Kongsvingerveien 37 AS | Real estate | 2005 |
| Kongsåsen Eiendomsselskap AS | Real estate | 2001 |
| Kongsøre Productions AS | Professional & scientific | 2021 |
| Kongtech AS | Real estate | 2020 |
| Konica Minolta Business Solutions Norway AS | Wholesale & retail | 1992 |
| Konil AS | | 2021 |
| Konity AS | Hospitality | 2025 |
| Konkaven AS | Real estate | 2014 |
| Konkret AS | Information & communication | 2014 |
| Konkurransekraft AS | Professional & scientific | 1985 |
| Konnect E2E AB Nuf | Wholesale & retail | 2024 |
| Konnekt Norge AS | Wholesale & retail | 2016 |
| Konnekta AS | Administrative & support | 2025 |
| Konnerud Utvikling AS | Real estate | 2019 |
| Konnerud Utvikling Parkering AS | Real estate | 2019 |
| Konnichiwa AS | Professional & scientific | 2017 |
| Kono Green AS | Wholesale & retail | 2021 |
| Konoji AS | Hospitality | 2020 |
| Kononsky AS | Financial services | 2017 |
| Konotori AS | Professional & scientific | 2026 |
| Konows Auto AS | Wholesale & retail | 2021 |
| Konows Gate 85 Eiendom AS | Real estate | 2026 |
| Konows Hager AS | Real estate | 2021 |
| Konowsg 5 B AS | Real estate | 1992 |
| Konowsgate 1 Næring AS | Real estate | 2015 |
| Konowsgate 43 AS | Real estate | 2011 |
| Konowsgate 67 B AS | Real estate | 2011 |
| Konowsgate 82 AS | Households | 1959 |
| Konowsgate 96 A&B Holding AS | | 2024 |
| Konowsgate Dagligvarer AS | Wholesale & retail | 2017 |
| Konowsgate Finans AS | Real estate | 2007 |
| Konowsgate Nærbutikk AS | Wholesale & retail | 2012 |
| Konradia AS | | 2022 |
| Kons AS | Information & communication | 2014 |
| Konse AS | Professional & scientific | 2026 |
| Konsel AS | Professional & scientific | 2019 |
| Konsensit AS | Information & communication | 2001 |
| Konsensus AS | Real estate | 1989 |
| Konsent AS | Information & communication | 2005 |
| Konsept A/S | Information & communication | 2024 |
| Konsept Innredning AS | Wholesale & retail | 2026 |
| Konsept Malerservice AS | Construction | 2014 |
| Konsept Prosjekt AS | Real estate | 2019 |
| Konseptpikene Da | Professional & scientific | 2004 |
| Konserthuset Restaurantdrift AS | Hospitality | 2011 |
| Konsertsystemer Invest AS | Real estate | 2016 |
| Konsertsystemer LLB AS | Arts & recreation | 2013 |
| Konserv AS | Professional & scientific | 1996 |
| Konsilito AS | Information & communication | 2021 |
| Konsin Holdco AS | | 2026 |
| Konsis AS | Manufacturing | 1992 |
| Konsis Eiendom AS | Real estate | 2004 |
| Konsit AS | Professional & scientific | 2020 |
| Konstabel AS | Wholesale & retail | 2013 |
| Konstali Helsenor AS | Administrative & support | 2023 |
| Konstantbygg AS | Construction | 2016 |
| Konstantin Holding AS | | 2025 |
| Konstlagret Sverige AB Nuf | Wholesale & retail | 2017 |
| Konstra AS | Construction | 2021 |
| Konstruktiv AS | Construction | 2020 |
| Konstrukton AS | Construction | 2023 |
| Konsul Eiendom AS | Real estate | 1997 |
| Konsulent 1 AS | Professional & scientific | 2011 |
| Konsulent Dan Gøran Lunde AS | Wholesale & retail | 2014 |
| Konsulent Gunnar Pedersen AS | Construction | 1992 |
| Konsulent Service Limited Nuf | Wholesale & retail | 2020 |
| Konsulent Stenersen Holding AS | Information & communication | 2020 |
| Konsulent Trond Owren AS | Professional & scientific | 2014 |
| Konsulent Truls Kjølberg AS | Professional & scientific | 2006 |
| Konsulentfellesskapet Sæther Wingaard Hagen & Partners Da | Professional & scientific | 1990 |
| Konsulentfirmaet Geir Lahnstein AS | Education | 1991 |
| Konsulentfirmaet Molberg AS | Professional & scientific | 2019 |
| Konsulentfirmaet Skard Da | Professional & scientific | 2012 |
| Konsulentfirmaet Sms-Electro Ans | Administrative & support | 1997 |
| Konsulentguiden Ans | Information & communication | 1995 |
| Konsulentmf AS | Arts & recreation | 2023 |
| Konsulentselskapet Enso AS | Information & communication | 2015 |
| Konsulentselskapet Glasshuset AS | Professional & scientific | 2005 |
| Konsulentselskapet Overhuset AS | Information & communication | 2009 |
| Konsulenttorget AS | Administrative & support | 2021 |
| Konsuling AS | Professional & scientific | 2023 |
| Konsum Gruppen Norge AS | Wholesale & retail | 2000 |
| Konsys AS | Information & communication | 2025 |
| Kontakt El-Installasjon AS | Construction | 2000 |
| Kontaktene Holding AS | Construction | 2020 |
| Kontas Regnskap AS | Professional & scientific | 1990 |
| Kontekst Konsult AS | Information & communication | 2019 |
| Kontent AS | Professional & scientific | 2018 |
| Kontent Lab AS | Professional & scientific | 2020 |