| Archus Arkitekter AS | Oslo | 1987 |
| Archway AS | Asker | 2015 |
| Arcis Holding AS | Oslo | 2026 |
| Arco AS | Bønes | 2024 |
| Arco Holding AS | Ler | 2007 |
| Arco Nor AS | Vikersund | 2006 |
| Arcoline Arkitektur AS | Nesttun | 2024 |
| Arcon Prosjekt AS | Namsos | 1991 |
| Arconsult Ove Bøe AS | Jessheim | 1986 |
| Arcoral Pharma AS | Oslo | 2011 |
| Arcreare AS | Namsos | 1998 |
| Arct AS | Oslo | 2014 |
| Arctan Holding AS | Oslo | 1998 |
| Arctander AS | Sunndalsøra | 2025 |
| Arctech Energy AS | Stavanger | 2021 |
| Arctech Holding AS | Stavanger | 2024 |
| Arctia Meritaito OY | Fi-00160 Helsinki | 2015 |
| Arctic 1 AS | Grimstad | 2016 |
| Arctic 3D & Design AS | Brekstad | 2026 |
| Arctic 3D-DESIGN AS | Båtsfjord | 2023 |
| Arctic Accounting AS | Rykkinn | 2005 |
| Arctic Advisory AS | Haslum | 2026 |
| Arctic Algae AS | Larsnes | 2020 |
| Arctic Aviation Center AS | Bardufoss | 2022 |
| Arctic Base Invest AS | Fornebu | 2012 |
| Arctic Biowave Systems AS | Porsgrunn | 2024 |
| Arctic Boreal Invest Holding AS | Trondheim | 2024 |
| Arctic Brother Capital AS | Oslo | 2014 |
| Arctic Buying Group AS | Oslo | 2024 |
| Arctic Circle Consulting AS | Tromsø | 2020 |
| Arctic Circle Hospitality Invest AS | Oslo | 2017 |
| Arctic Circle Total AS | Storforsheia | 2022 |
| Arctic Consult & Invest AS | Narvik | 2007 |
| Arctic Consult AS | Bodø | 1982 |
| Arctic Consulting AS | Oslo | 2024 |
| Arctic Cooling-Systems AS | Mosjøen | 2018 |
| Arctic Defence AS | Hvalstad | 2005 |
| Arctic Development AS | Vardø | 2012 |
| Arctic Digital AS | Oslo | 2016 |
| Arctic Drone & Photography AS | Lakselv | 2019 |
| Arctic Effekt Ans | Kirkenes | 1994 |
| Arctic Energy Systems AS | Fauske | 2019 |
| Arctic Event AS | Rypefjord | 2013 |
| Arctic Experts AS | Bodø | 2020 |
| Arctic Exploration AS | Asker | 2022 |
| Arctic Export Management AS | Oslo | 2025 |
| Arctic Falcon Aviation Consulting AS | Bodø | 2023 |
| Arctic Feed Ingredients AS | Steinkjer | 2013 |
| Arctic Green AS | Ånstad | 2015 |
| Arctic Green Development AS | Oslo | 2018 |
| Arctic Group International AS | Oslo | 1991 |
| Arctic Hardanger AS | Valen | 2018 |
| Arctic Health Solutions AS | Tromsø | 2024 |
| Arctic Image AS | Harstad | 1998 |
| Arctic Investment Holding AS | Oslo | 2019 |
| Arctic Knits AS | Våle | 2024 |
| Arctic Knowledge AS | Oslo | 2017 |
| Arctic Light AS | Haslum | 2003 |
| Arctic Living AS | Harstad | 2002 |
| Arctic Logistics AS | Bardufoss | 2019 |
| Arctic Management AS | Narvik | 2007 |
| Arctic Maritime Holding AS | Lovund | 2019 |
| Arctic Mediaservice AS | Brønnøysund | 2008 |
| Arctic Minerals Management AS | Oslo | 2016 |
| Arctic Motion AS | Asker | 2025 |
| Arctic Nutrition AS | Ørsta | 2020 |
| Arctic Offshore Technologies AS | Sortland | 2000 |
| Arctic Oil Tools AS | Narvik | 2017 |
| Arctic Pharma AS | Oslo | 2012 |
| Arctic Pictures Nuf | Dk-8300 Odder | 2024 |
| Arctic Pioneers AS | Bodø | 2006 |
| Arctic Prime AS | Karasjok | 2018 |
| Arctic Real Estate Management AS | Oslo | 2010 |
| Arctic Regnskap AS | Harstad | 2008 |
| Arctic Renewables AS | Narvik | 2018 |
| Arctic Renewables Vest Da | Narvik | 2026 |
| Arctic Renewables Øst Da | Narvik | 2026 |
| Arctic Research and Development AS | Oslo | 2025 |
| Arctic Sea Invest AS | Tromsø | 2015 |
| Arctic Seed AS | Mo I Rana | 2022 |
| Arctic Sensing AS | Kviteseid | 2025 |
| Arctic Silicon Carbide AS | Sulitjelma | 2024 |
| Arctic Silver Innovation AS | Eggkleiva | 2009 |
| Arctic Solution AS | Vadsø | 2025 |
| Arctic Solutions AS | Grimstad | 2017 |
| Arctic Spas Marketing Norway Da | Sola | 2009 |
| Arctic Start AS | Alta | 2025 |
| Arctic Stick on Stage AS | Harstad | 2018 |
| Arctic Subsea AS | Tønsberg | 2009 |
| Arctic Summit AS | Brumunddal | 2025 |
| Arctic Supply Management AS | Oslo | 2019 |
| Arctic Survey AS | Mo I Rana | 2019 |
| Arctic Trade AS | Halden | 2025 |
| Arctic Trial Racing AS | Hommersåk | 2016 |
| Arctic V Consulting AS | Tromsø | 2024 |
| Arctic Vision Consulting AS | Son | 2001 |
| Arctic Well Invest AS | Harstad | 2016 |
| Arctic Whisper AS | Meistervik | 2025 |
| Arctic Windows AS | Kristiansand S | 2020 |
| Arctic Yield AS | Haugesund | 2022 |