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| Kongsvinger Invest AS | Granli | 1997 |
| Kongsvinger Kompetanse - Og Næringssenter AS | Kongsvinger | 2006 |
| Kongsvinger Retail I AS | Gjerdrum | 2013 |
| Kongsvinger Retail II AS | Gjerdrum | 2013 |
| Kongsvinger Science Park AS | Kongsvinger | 2022 |
| Kongsvinger Sentrumshotell AS | Kongsvinger | 2018 |
| Kongsvinger Tomteutvikling AS | Kongsvinger | 2021 |
| Kongsvingerveien 27 AS | Oslo | 2015 |
| Kongsvingerveien 37 AS | Oslo | 2005 |
| Kongsåsen Eiendomsselskap AS | Oslo | 2001 |
| Kongtech AS | Oslo | 2020 |
| Konkaven AS | Oslo | 2014 |
| Konkret Eiendom AS | Konsmo | 2020 |
| Konkret Utvikling AS | Konsmo | 2020 |
| Konnerud B1 AS | Drammen | 2024 |
| Konnerud Senter AS | Drammen | 2007 |
| Konnerud Takst AS | Drammen | 2016 |
| Konnerud Utvikling AS | Oslo | 2019 |
| Konnerud Utvikling Næring AS | Drammen | 2019 |
| Konnerud Utvikling Parkering AS | Oslo | 2019 |
| Konnerudgata 28 - 4 AS | Drammen | 2019 |
| Konnerudgata 324 AS | Drammen | 2018 |
| Konnerudgata 73 AS | Hokksund | 2025 |
| Konningrud Og Bergersen Eiendom Da | Stavsjø | 2003 |
| Konos Eiendom AS | Trondheim | 2012 |
| Konow Lund Skjoldnes AS | Bergen | 2018 |
| Konows Gate 85 Eiendom AS | Oslo | 2026 |
| Konows Hager AS | Oslo | 2021 |
| Konowsg 5 B AS | Oslo | 1992 |
| Konowsgate 1 Næring AS | Oslo | 2015 |
| Konowsgate 43 AS | Oslo | 2011 |
| Konowsgate 67 B AS | Oslo | 2011 |
| Konowsgate Finans AS | Oslo | 2007 |
| Konrad Bråthen AS | Lillestrøm | 1963 |
| Konsensus AS | Oslo | 1989 |
| Konsept Eiendomsutvikling AS | Gressvik | 2025 |
| Konsept K AS | Sandefjord | 2019 |
| Konsept Prosjekt AS | Oslo | 2019 |
| Konseptbygg Eiendom AS | Paradis | 1994 |
| Konseptpluss AS | Lillestrøm | 2011 |
| Konsertsystemer Invest AS | Oslo | 2016 |
| Konsido AS | Haslum | 2007 |
| Konsis Eiendom AS | Oslo | 2004 |
| Konsmo Eiendom AS | Konsmo | 2018 |
| Konsmo Flerbrukshall AS | Konsmo | 2008 |
| Konstanse Holding AS | Sistranda | 2021 |
| Konstanse Invest AS | Isdalstø | 2005 |
| Konstruktiv Eiendom AS | Haugesund | 2012 |
| Konsul 57-59 AS | Kristiansund N | 2026 |
| Konsul Eiendom AS | Oslo | 1997 |
| Konsul Jebsensgate 10 AS | Ulset | 2002 |
| Konsul Jebsensgate 11 Ans | Dalekvam | 2005 |
| Konsul Knudtzons Gate 1 AS | Trondheim | 2023 |
| Konsul Knudtzons Gate 12 AS | Kristiansund N | 2008 |
| Konsul Knudtzons Gate 8 AS | Tustna | 2024 |
| Konsulatet AS | Risør | 2018 |
| Konsulen AS | Trondheim | 2002 |
| Konsulentfirmaet Geir Kristoffersen AS | Fredrikstad | 1990 |
| Kontakt Eiendom AS | Bergen | 2001 |
| Kontakthuset AS | Ål | 1987 |
| Kontant B Holding AS | Bjørøyhamn | 2011 |
| Kontar Holding AS | Østre Gausdal | 2015 |
| Konterud Eiendom AS | Jessheim | 1980 |
| Kontinentalveien 24 AS | Tananger | 2011 |
| Kontor AS | Oslo | 2022 |
| Kontor Design Eiendom AS | Bardufoss | 2019 |
| Kontor Og Grafisk Eiendom AS | Alta | 2005 |
| Kontorbygg AS | Alvdal | 1983 |
| Kontoreiendom AS | Hønefoss | 2011 |
| Kontoret AS | Bodø | 2013 |
| Kontoret I Son AS | Son | 2023 |
| Kontorfellesskapet 1724 SA | Vang I Valdres | 2013 |
| Kontorfellesskapet O20 AS | Oslo | 2025 |
| Kontorfellesskapet Oslo Eiendomssenter AS | Oslo | 1991 |
| Kontorfellesskapet ROV28 AS | Kjeller | 2021 |
| Kontorfellesskapet Vinderentorget AS | Oslo | 2006 |
| Kontorhuset Bragernes AS | Drammen | 1998 |
| Kontorhuset Drift AS | Drammen | 2017 |
| Kontorhuset Surnadal AS | Surnadal | 2000 |
| Kontorsenteret Austevoll AS | Storebø | 2006 |
| Kontorservice AS | Stavanger | 1975 |
| Kontorservice Eiendom AS | Kautokeino | 1987 |
| Kontorservice Holding AS | Alta | 2000 |
| Kontorutleie S4 AS | Tromsø | 2012 |
| Kontorveien 1 AS | Kristiansund N | 2013 |
| Kontorveien 2 AS | Kristiansund N | 2012 |
| Kontra-Turn AS | Farsund | 2020 |
| Kontrabass Holding AS | Kragerø | 2012 |
| Kontrari Eiendom AS | Egersund | 1995 |
| Kontrast Bolig AS | Oslo | 2019 |
| Kontrast Bolig SPV 1 AS | Oslo | 2020 |
| Kontrast Eiendom AS | Tvedestrand | 2010 |
| Kontrast Holding AS | Skreia | 2015 |
| Kontrast Invest AS | Oslo | 2006 |
| Kontrazi AS | Egersund | 2022 |
| Kontrollvegen 1 AS | Lysaker | 2023 |
| Kontrollveien 3 AS | Gjøvik | 2016 |
| Kontur Bygg AS | Stord | 2007 |
| Kontur Eiendom AS | Titran | 2012 |