| Jakobsen & Jakobsen Holding AS | Bøstad | 2019 |
| Jakobsen Administrasjon AS | Stavanger | 2012 |
| Jakobsen Eiendom AS | Kodal | 1996 |
| Jakobsen Eiendom Invest AS | Sortland | 2021 |
| Jakobsen Eiendom Og Utleie AS | Gjesåsen | 2016 |
| Jakobsen Holding AS | Kopervik | 2005 |
| Jakobsen Mekaniske Verksted AS | Sleneset | 1987 |
| Jakobsen Nor Invest AS | Herøy | 1995 |
| Jakobsen Og Jakobsen Eiendom Ans | Bøstad | 1996 |
| Jakobsen Takst Og Bygg AS | Harstad | 2021 |
| Jakobsen Utleie Og Eiendom Ans | Frei | 2010 |
| Jakobsen-Invest AS | Søgne | 2006 |
| Jakobsli AS | Gressvik | 2018 |
| Jakobslivegen 1 AS | Trondheim | 2017 |
| Jakobslivegen 65 AS | Trondheim | 2017 |
| Jakobslivegen 7 Eiendom AS | Trondheim | 2018 |
| Jakobsliveien 57 AS | Oslo | 2020 |
| Jakobsliveien 59 A/B AS | Oslo | 2020 |
| Jakobsnes Eiendom AS | Molde | 2012 |
| Jakobsnes Utvikling AS | Kirkenes | 2015 |
| Jakobsåsen Hyttegrend AS | Dalsbygda | 2008 |
| Jakra AS | Oslo | 2019 |
| Jakslandsveien 111 AS | Røyken | 2019 |
| Jakslandåsen AS | Oslo | 2017 |
| Jakslandåsen Boligutvikling AS | Oslo | 2020 |
| Jakt 1332 AS | Vanvikan | 2021 |
| Jakta Invest AS | Ålesund | 2013 |
| Jakte AS | Vågå | 2022 |
| Jaktlia 1 AS | Lysaker | 1946 |
| Jaktlia 19 Eiendom AS | Oslo | 2023 |
| Jaktlia Utvikling AS | Oslo | 2022 |
| Jaku Syvde AS | Syvde | 2020 |
| Jakupovic Holding AS | Drammen | 2025 |
| Jakvam AS | Sogndal | 2009 |
| Jakvi AS | Oslo | 1994 |
| Jaky AS | Bergen | 2019 |
| Jal - Invest AS | Molde | 2005 |
| Jal Eiendom AS | Overhalla | 2023 |
| Jal Holding AS | Lysaker | 2013 |
| Jala Eiendom AS | Porsgrunn | 1988 |
| Jale Bolig AS | Stabekk | 2022 |
| Jale Eiendom Ans | Vestfossen | 2000 |
| Jali Holding AS | Vikedal | 2005 |
| Jalis AS | Vestre Gausdal | 2021 |
| Jalita Holding AS | Lyngdal | 2015 |
| Jalmaus Invest AS | Oslo | 2011 |
| Jalms Holding AS | Bergen | 2021 |
| Jalon AS | Molde | 2022 |
| Jam Utvikling AS | Sande I Vestfold | 2022 |
| Jam-Invest AS | Harstad | 2024 |
| Jama Holding AS | Oslo | 2005 |
| Jama Invest AS | Hjellestad | 2017 |
| Jama Lyngen Ans | Nord-Lenangen | 2006 |
| Jamani Ans | Karasjok | 2004 |
| Jamav Invest AS | Hyllestad | 2014 |
| Jambo Eiendom AS | Oslo | 2003 |
| Jamea AS | Namsos | 2022 |
| James Andersen Invest Ltd Nuf | Oslo | 2007 |
| James Clark Eiendom AS | Sandefjord | 2014 |
| James Holding AS | Svelvik | 2023 |
| James IV AS | Jessheim | 2016 |
| James Strong AS | Jessheim | 2015 |
| Jamne Eiendom AS | Prestfoss | 2008 |
| Jamo Eiendom AS | Bodø | 1997 |
| Jamo Property AS | Kristiansand S | 2021 |
| Jams Invest AS | Kristiansand S | 2019 |
| Jamy Eiendom AS | Dalsgrenda | 2015 |
| Jan Arthur Olsens Eiendomsselskap AS | Kokstad | 1981 |
| Jan Edvardsen Eiendomsselskap AS | Grålum | 1986 |
| Jan Egil Solheim Eiendom AS | Knarrevik | 2008 |
| Jan Egil Solheim Holding AS | Knarrevik | 2008 |
| Jan Eiendom AS | Orkanger | 2017 |
| Jan Eirik Kolstad Invest AS | Isdalstø | 2021 |
| Jan Erik Søreide AS | Bjordal | 2013 |
| Jan Espe Holding AS | Bø I Telemark | 2020 |
| Jan FR. Bjerkenes Holding AS | Trøgstad | 2006 |
| Jan Fredrik Holten Eiendom AS | Alta | 2014 |
| Jan G Eide Eiendom AS | Bryne | 1986 |
| Jan Hagen Eiendom AS | Tistedal | 2003 |
| Jan Holte Holding AS | Sandvika | 2018 |
| Jan Inge Gjermundshaug AS | Alvdal | 2014 |
| Jan Invest Holding AS | Hamar | 2005 |
| Jan Kjell Rugtvedt Holding AS | Stathelle | 2005 |
| Jan Kjønnås Eiendom AS | Mosjøen | 2008 |
| Jan Kåre Midthjell Holding AS | Oslo | 2015 |
| Jan Lassesen Holding AS | Kongshavn | 2013 |
| Jan Lingjerde AS | Bergen | 1964 |
| Jan Magnar Fosse AS | Odda | 1987 |
| Jan Magnus Nilsen AS | Kleppestø | 2007 |
| Jan Marhaug Eiendom AS | Svolvær | 2016 |
| Jan Melvold Holding AS | Trondheim | 2015 |
| Jan P Holding AS | Trondheim | 2008 |
| Jan S Arvesen AS | Vøyenenga | 1982 |
| Jan Saltermark Og Sønn AS | Brønnøysund | 1988 |
| Jan Svenskerud Holding AS | Kongsberg | 2019 |
| Jan Sørra Holding AS | Sandnessjøen | 2009 |
| Jan T. Thomassen Holding AS | Ranheim | 2005 |
| Jan Ulvan AS | Trondheim | 1982 |
| Jan Wold Eiendom AS | Ås | 2022 |
| Jan Wold Holding AS | Ås | 2022 |