| Kristiansen Og Larsen Maling & Interiør AS | Færvik | 2004 |
| Kristiansen Og Stensrud AS | Tranby | 2013 |
| Kristiansen Rør & Service AS | Eydehavn | 2025 |
| Kristiansen Rør Og Maskin AS | Alta | 2016 |
| Kristiansen Rørservice AS | Sofiemyr | 2024 |
| Kristiansen Snekker Og Vaktmesterservice AS | Bogøy | 2014 |
| Kristianstuen Byggeservice AS | Tretten | 2006 |
| Kristiansund Eiendomsservice AS | Kristiansund N | 2020 |
| Kristiansund Elektro AS | Kristiansund N | 2011 |
| Kristiansund Mur Og Betong AS | Kristiansund N | 2017 |
| Kristiansund Mur Og Flis AS | Kristiansund N | 2017 |
| Kristiansund Og Frei Rørservice AS | Frei | 2010 |
| Kristinelundveien 14B AS | Oslo | 2021 |
| Kristjan Lura Mur & Flis AS | Sandnes | 2024 |
| Kristjansson Malerservice AS | Sandefjord | 2020 |
| Kristof Holding AS | Sømna | 2025 |
| Kristofer Vedlikehold AS | Gressvik | 2019 |
| Kristofersen Drift AS | Tveit | 2026 |
| Kristoffer Apeland Invest AS | Haugesund | 2021 |
| Kristoffer Aune AS | Sveio | 2021 |
| Kristoffer Byggservice AS | Aurskog | 2024 |
| Kristoffer Näs AS | Røros | 2017 |
| Kristoffer Sirevåg AS | Skudeneshavn | 2022 |
| Kristoffer Skjebstad Holding AS | Mandal | 2023 |
| Kristoffer Smith Malerservice AS | Sem | 2022 |
| Kristoffer Tullerud AS | Skollenborg | 2026 |
| Kristoffer Åkre Maskin AS | Nå | 2014 |
| Kristoffersen AS | Hokksund | 2016 |
| Kristoffersen Bygg AS | Tverrelvdalen | 2025 |
| Kristoffersen Elektro AS | Kapp | 2010 |
| Kristoffersen VVS AS | Kokstad | 2016 |
| Kristoffersens Håndtverk AS | Greåker | 2022 |
| KRL Eiendom AS | Kristiansand S | 2015 |
| KRN Bygg AS | Lofthus | 2025 |
| Kro-Maskin AS | Kløfta | 2024 |
| Kroeze Interieurbouw B.V | 7570 Ee Oldenzaal | 2015 |
| Krog Bygg & Eiendom AS | Oslo | 2000 |
| Krog Maskin & Transport AS | Mysen | 2026 |
| Krogenæs-Larsen Klima AS | Mathopen | 2018 |
| Krogh & Hammerfjell Eiendom AS | Trondheim | 2025 |
| Krogs Maskin Og Drift AS | Høylandet | 2014 |
| Krogset AS | Vikebukt | 2011 |
| Krogset Bygg AS | Vikebukt | 1982 |
| Krogseth AS | Sarpsborg | 1991 |
| Krogstad Baczewski Rør AS | Oslo | 2015 |
| Krogstad Bygg AS | Rennebu | 2022 |
| Krogstadfjorden Eiendomsutvikling AS | Råde | 2002 |
| Krogstie Bygg AS | Brumunddal | 2023 |
| Krohn Hytter AS | Kleppestø | 2022 |
| Krohn Hytter Sør-Vest AS | Kvinlog | 2025 |
| Krohnegården Byggservice AS | Rådal | 2009 |
| Kroken AS | Oslo | 2025 |
| Kroken Maskin AS | Neslandsvatn | 1995 |
| Krokmyra Utbygging Vva Ans | Ålesund | 2022 |
| Krokstad Maskin AS | Krokstadelva | 2012 |
| Krokstad Rør AS | Krokstadelva | 2003 |
| Krokstad Tømrer Og Opplæring AS | Krokstadelva | 2025 |
| Krokå Bygg AS | Etne | 2023 |
| Kroma Maling AS | Oslo | 2018 |
| Kronbygg AS | Rong | 2013 |
| Kronen Bygg AS | Vikersund | 2017 |
| Kronfjell AS | Nissedal | 2016 |
| Kronstad Byggtjenester AS | Sandefjord | 2023 |
| Kronstein Entreprenør AS | Sortland | 2017 |
| Kronsteingruppen AS | Sortland | 1979 |
| Kronæ AS | Voss | 2017 |
| Kroon Maskin AS | Fagernes | 1998 |
| Krosby Ventilasjon AS | Ørje | 2018 |
| Krossen Eiendom AS | Evje | 2014 |
| Krossli Maskinentreprenør AS | Fyresdal | 2019 |
| KRS Flislegging Og Hudpleie AS | Kristiansand S | 2016 |
| KRS Gruppen AS | Stokmarknes | 2023 |
| KRS Service AS | Sogndal | 2021 |
| Krug Holding AS | Haugesund | 2019 |
| Kruger | Dk-2860 Søborg | 1997 |
| Kruk Construction | 1422 Wyndham Cir Apt 203 | 2009 |
| Krumsvik Elektro AS | Haugesund | 2017 |
| Kruse Anlegg-Vest Ans | Kristiansand S | 2022 |
| Kruse Smith Entreprenør Øst AS | Lysaker | 2022 |
| Krusedokken Bygg AS | Nesbyen | 2017 |
| Krusemarka Eiendom AS | Nærbø | 2018 |
| Krusty Holding AS | Stathelle | 2016 |
| Kruszelnicki Thoasz | Oslo | 2007 |
| Kry Bad AS | Nøtterøy | 2022 |
| Krye AS | Leira I Valdres | 2024 |
| Krys-Bud Krzysztof Szymanski | Pl-19-300 Elk | 2014 |
| Krystall Byggservice AS | Ski | 2014 |
| Krystbud Nuf | Pl-87-800 Wloclawek | 2012 |
| Krystian Buchacz Buchacz | 81-218 Gdynia | 2007 |
| Krystian Bygg AS | Heimdal | 2021 |
| Krystian Grzenkowicz | 84-100 Puck | 2007 |
| Krystian Holding AS | Heimdal | 2019 |
| Krystian Misztal KM Invest | 26-900 Kozienice | 2013 |
| Krystian Wojtowicz Construct Nuf | Pl-80414 Gdansk | 2022 |
| Krystof Bygg AS | Nesttun | 2011 |
| Krystof Eiendom AS | Nesttun | 2013 |
| Krystof Holding AS | Nesttun | 2017 |
| Krzysztof Drzyzga | 13-100 Nidzica | 2007 |
| Krzysztof Godula | 47-320 Gololin | 2008 |
| Krzysztof Kotarski Krzysztof | 57-230 Walbrzycii | 2007 |