| Nortronix AS | Stavern | 2006 |
| Nortura SA | Oslo | 1931 |
| Norumbryggeriet AS | Sørum | 2015 |
| Norvainis AS | Stamsund | 2022 |
| Norved AS | Sandefjord | 2006 |
| Norvegr Down Duvets AS | Tiller | 2002 |
| Norvigroup Norsk Dun AS | Mysen | 2002 |
| Norvivo AS | Haramsøy | 2023 |
| Norwater AS | Høylandsbygd | 1995 |
| Norwaters Holding AS | Melhus | 2013 |
| Norway Fortescue Future Industries Holdings AS | Oslo | 2023 |
| Norway Truck Export AS | Rudshøgda | 2011 |
| Norwegian Acoustics AS | Rådal | 2025 |
| Norwegian Aero Solutions AS | Hønefoss | 2024 |
| Norwegian Cozy AS | Elverum | 2013 |
| Norwegian Designhouse AS | Kristiansand S | 2014 |
| Norwegian Electric Systems AS | Godvik | 2009 |
| Norwegian Energy Production AS | Laksevåg | 2019 |
| Norwegian Fiberboard AS | Grimstad | 2021 |
| Norwegian Food Trade AS | Torpo | 2024 |
| Norwegian Gold Caviar AS | Bergen | 2016 |
| Norwegian Green Energy AS | Oslo | 2018 |
| Norwegian Hydrogen AS | Ålesund | 2020 |
| Norwegian Marine Construction AS | Sofiemyr | 1989 |
| Norwegian Maritime Control Systems AS | Indre Arna | 2007 |
| Norwegian Mast & Tower AS | Hedalen | 2017 |
| Norwegian People AS | Treungen | 2014 |
| Norwegian Rain AS | Bergen | 2008 |
| Norwegian Seaweed AS | Vanvikan | 2019 |
| Norwegian Service Team Contracting AS | Avaldsnes | 2002 |
| Norwegian Soda Company AS | Vinterbro | 2021 |
| Norwegian Special Mission AS | Nannestad | 2003 |
| Norwegian Spring Water AS | Grimsbu | 2022 |
| Norwegian Tonewood AS | Fåberg | 2013 |
| Norwegian Universal Technology AS | Aksdal | 1984 |
| Norwegian Watch Company AS | Porsgrunn | 2016 |
| Norwegian Water AS | Varangerbotn | 2015 |
| Norwegian Welding Service AS | Haugesund | 2022 |
| Norwegian Wood Design AS | Drammen | 2016 |
| Norwegian Wool AS | Dalekvam | 2018 |
| Norwest AS | Haramsøy | 2019 |
| Norwest Eiendom AS | Avaldsnes | 2017 |
| Norwest Holding AS | Avaldsnes | 2017 |
| Norwest Marine Service AS | Avaldsnes | 2017 |
| Norwia AS | Sandefjord | 2010 |
| Norx Solution AS | Fauske | 2026 |
| Norxe AS | Kråkerøy | 2015 |
| Nos Group AS | Sandnes | 2024 |
| Nos Service AS | Sandnes | 2015 |
| NOS5 AS | Borgenhaugen | 2011 |
| Noss Maskin AS | Skei I Jølster | 2020 |
| Not Industrimaling AS | Bryne | 2005 |
| Not Prosess AS | Bryne | 2017 |
| Not Pulverlakk AS | Sandnes | 2005 |
| Not Varmforzinking AS | Nærbø | 2005 |
| Notbøteriet AS | Havøysund | 2006 |
| Notech AS | Sandefjord | 1990 |
| Nototap AS | Oslo | 2025 |
| Noumami AS | Voll | 2017 |
| Nouryon Pulp and Performance Chemicals Norway AS | Rjukan | 1992 |
| Nova Biotics AS | Asker | 2000 |
| Nova Holding AS | Grålum | 2005 |
| Nova Interiør AS | Tromsdalen | 1986 |
| Novablue Marine AS | Kristiansand S | 2018 |
| Novapac Verpackungsmaschinen GmbH | De-88239 Wangen | 2022 |
| Novelty Food AS | Oslo | 2020 |
| Novema Aggregater AS | Skjetten | 1967 |
| Novita Invest AS | Averøy | 2022 |
| Novo Nordisk - Nuf | Dk-2880 Bagsværd | 2025 |
| Nox Dekor AS | Geithus | 2018 |
| Nox Products AS | Klokkarstua | 2005 |
| Noyen Spolka Z Ograniczona Odpowiedzialnoscia Nuf | 20-270 Lublin | 2025 |
| NP Nordic Protection AS | Haugesund | 1999 |
| NPB AS | Hornindal | 2017 |
| NPM Service AS | Mo I Rana | 2019 |
| NPP AS | Kleppestø | 2024 |
| NR Global Resources Ltd | Tsim Sha Tsui, Kowloon | 2015 |
| NR Invest AS | Aurdal | 2008 |
| NR1 Trykk Larvik AS | Larvik | 1998 |
| Nretning AS | Asker | 2015 |
| NSL Eiendom & Invest AS | Sola | 2006 |
| NSS Norway | Pl-71-610 Szczecin | 2024 |
| NT Products AS | Sandnes | 2017 |
| NTB Maskinservice AS | Skollenborg | 2024 |
| NTD AS | Skånevik | 2019 |
| Nte Hydrogen AS | Steinkjer | 2016 |
| Nti MH AS | Oslo | 2015 |
| NTP Holding AS | Fredrikstad | 2005 |
| NTS Bryterservice AS | Borgenhaugen | 2022 |
| NTS Holding AS | Borgenhaugen | 2021 |
| Nttr Holding AS | Kolltveit | 2010 |
| Nu Service AS | Fossdal | 2026 |
| Nua Brygghus AS | Mandal | 2013 |
| Nubbis AS | Trondheim | 2016 |
| Nuet AS | Oslo | 2018 |
| Nuf - Becton Dickinson U.K. Limited | Oslo | 2024 |
| Nuf-Becton Dickinson Denmark A/S | Oslo | 2024 |
| Nuf-Becton Dickinson France | Oslo | 2024 |
| Nuf-Becton Dickinson Sweden AB | Oslo | 2024 |
| Numedal Betong AS | Nore | 2000 |