| Knivsøveien Eiendom AS | Rakkestad | 2019 |
| KNK Haug Invest AS | Hemsedal | 2021 |
| KNM AS | Oslo | 2005 |
| KNM Eiendom AS | Kleppe | 2024 |
| Knobel AS | Halden | 2013 |
| Knobel Eiendom AS | Vennesla | 2021 |
| Knoll AS | Bergen | 2005 |
| Knoll Og Tott Eiendom AS | Mandal | 2010 |
| Knottan AS | Vanse | 2012 |
| Knottveien 15 AS | Alta | 2011 |
| KNR Eiendom AS | Stavanger | 2017 |
| KNR Finans AS | Stavanger | 2017 |
| KNR Invest AS | Stavanger | 1989 |
| KNS Eiendom AS | Halden | 2016 |
| KNS Handel AS | Jørpeland | 2006 |
| Knubben AS | Namsos | 2019 |
| Knubben Eiendom AS | Ålen | 1989 |
| Knud Bryns Vei 1 AS | Oslo | 2016 |
| Knud Bryns Vei 15 AS | Kråkerøy | 2018 |
| Knud Bryns Vei 3 AS | Oslo | 2014 |
| Knud Bryns Vei 9 AS | Kråkerøy | 2018 |
| Knud Holmsgate 3 AS | Stavanger | 2013 |
| Knud Holmsgt. 5 Eiendom AS | Stavanger | 1994 |
| Knuden AS | Søgne | 2022 |
| Knuden Holding AS | Finsland | 2021 |
| Knuden Invest AS | Finsland | 2021 |
| Knudsen & Olsen Byggkontroll AS | Laksevåg | 2015 |
| Knudsen Eiendomsselskap AS | Paradis | 2019 |
| Knudsen Og Ramsevik Eiendom AS | Stokmarknes | 2021 |
| Knudsengården AS | Alta | 2006 |
| Knudsenkvartalet AS | Oslo | 2018 |
| Knudsrødveien 7 AS | Sandefjord | 2005 |
| Knudstad Eiendom AS | Undrumsdal | 2016 |
| Knudstadveien 11 AS | Horten | 2018 |
| Knumo AS | Østerås | 2015 |
| Knusk AS | Haugesund | 2018 |
| Knusktørr AS | Oslo | 2020 |
| Knusol Eigedom AS | Hornindal | 2016 |
| Knut a. Bakken Holding AS | Sperrebotn | 2005 |
| Knut Arne Kvitting Invest AS | Oslo | 2021 |
| Knut Axel Ugland Holding AS | Grimstad | 2000 |
| Knut Axel Ugland Invest AS | Grimstad | 2005 |
| Knut Borgersen Holding AS | Skien | 2005 |
| Knut Bryns Vei 1 Holding AS | Oslo | 2026 |
| Knut Bryns Vei 3 Holding AS | Oslo | 2026 |
| Knut Bryns Vei 5 Holding AS | Oslo | 2026 |
| Knut Bryns Vei Utvikling AS | Oslo | 2017 |
| Knut E. Bakken Eiendom AS | Sperrebotn | 2024 |
| Knut Einar Veum AS | Moss | 1933 |
| Knut Ekeberg AS | Oslo | 1963 |
| Knut Ellingvåg Og Sønner AS | Averøy | 1982 |
| Knut Farestvedt Invest Limited Nuf | Nesttun | 2009 |
| Knut Hamsundsvei 42 AS | Bodø | 2011 |
| Knut Hamsundsvei Bodø AS | Oslo | 2006 |
| Knut Hauge AS | Hafslo | 2012 |
| Knut Henriksen Eiendom AS | Saltnes | 2005 |
| Knut Henriksen Sten Eiendom AS | Gressvik | 2005 |
| Knut Invest AS | Bakkasund | 2005 |
| Knut Ivar Mork Holding AS | Hjelset | 2018 |
| Knut Jølberg Invest AS | Tranby | 2005 |
| Knut Jørstad AS | Rogne | 2014 |
| Knut Kolstad AS | Rødberg | 1997 |
| Knut Kvitrud AS | Ringebu | 2018 |
| Knut Langaas Eiendom AS | Horten | 2019 |
| Knut Lisø Holding AS | Stjørdal | 2013 |
| Knut Mathisen AS | Lyngseidet | 2019 |
| Knut Melby AS | Heggenes | 2005 |
| Knut Og Anita Holding AS | Hernes | 2021 |
| Knut Og Oskar Waage Ans | Fosnavåg | 1972 |
| Knut Ove Kristiansen Holding AS | Flekkerøy | 2005 |
| Knut Petterson Eiendom AS | Tønsberg | 2009 |
| Knut Ramberg AS | Helle | 2018 |
| Knut Robert Finnestad AS | Rakkestad | 2016 |
| Knut Sjøvold AS | Oslo | 2012 |
| Knut Skaugrud AS | Hov | 2000 |
| Knut Stoknes AS | Ålesund | 1965 |
| Knut Sørskår AS | Tau | 1986 |
| Knut T. Ueland AS | Sandefjord | 2022 |
| Knut Tom Knutsen AS | Bergen | 1969 |
| Knutabakken Næring AS | Husnes | 2024 |
| Knute Eiendom AS | Horten | 2007 |
| Knute Nelson-Gata Eigendom AS | Voss | 2018 |
| Knutehytta AS | Kongsberg | 1969 |
| Knutepunkt Porsgrunn AS | Porsgrunn | 2011 |
| Knutepunktet AS | Trondheim | 2026 |
| Knuti Holding AS | Fannrem | 2015 |
| Knuto AS | Haugesund | 2002 |
| Knuts AS | Drøbak | 2019 |
| Knuts Hyttegrend AS | Beitostølen | 2010 |
| Knutsdalen Utmarkslag Ba | Hornindal | 1995 |
| Knutsen & Didriksen AS | Stavanger | 2005 |
| Knutsen & Knutsen Eiendom AS | Bergen | 2021 |
| Knutsen & Vikra Eiendom AS | Åkrehamn | 2000 |
| Knutsen Eiendom AS | Drammen | 1987 |
| Knutsen Eiendom AS | Kristiansand S | 2000 |
| Knutsen Heim 1 AS | Skjærhalden | 2025 |
| Knutsen Og Halvorsen Invest AS | Porsgrunn | 2020 |
| Knutsen Takst AS | Haugesund | 2019 |
| Knutset Solem Holding AS | Tiller | 2023 |
| Knutshaug Eiendom AS | Dolmøy | 2025 |