| Adv Finance AS | Oslo | 2014 |
| Adv Holding & Invest AS | Vikhammer | 2022 |
| Adv Høines Holding AS | Sandve | 2022 |
| Advac R&D AS | Helle | 2022 |
| Advalo a AS | Oslo | 2025 |
| Advalo Consulting AS | Oslo | 2021 |
| Advalore AS | Høvåg | 2015 |
| Advance AS | Ranheim | 2019 |
| Advance Business Partner AS | Risør | 1997 |
| Advance Engineering AS | Sandnes | 2020 |
| Advance Global Recruitment Ltd | Edinburgh Eh7 4Hg Scotland | 2014 |
| Advanced Biopolymers AS | Trondheim | 2001 |
| Advanced Control AS | Stavanger | 1997 |
| Advanced Cost Reduction AS | Oslo | 2017 |
| Advanced Engine Technology Ltd | Ottawa Ontario K2H 9G1 | 2015 |
| Advanced Innergy Solutions Limited | Gloucester Gl2 4Pa | 2016 |
| Advanced Inspection Technologies LLC | La Porte Tx 77571 | 2016 |
| Advanced Interior Solutions International B.V. - Netherlands | Nl-1017 Tm Amsterdam | 2021 |
| Advanced International Management AS | Snarøya | 2000 |
| Advanced Logic Technology (Alt) S.A. Nuf | L-8506 Redange | 2023 |
| Advanced Mechatronics AS | Sandnes | 2025 |
| Advanced Monitoring Solutions AS | Oslo | 2024 |
| Advanced NDT Solutions Limited Norway | Westmeath N37Cf61 | 2023 |
| Advanced Thinkers Engineering AS | Notodden | 2003 |
| Advanced Ultrasonics BV | 2904 Pa Capelle Aan Den Ljssel | 2013 |
| Advanium Advokatfirma AS | Oslo | 2025 |
| Advanium AS | Oslo | 2025 |
| Advannor Advisory AS | Kristiansand S | 2025 |
| Advans Marketing AS | Molde | 2023 |
| Advanta AS | Fjellstrand | 2015 |
| Advantek AS | Kristiansand S | 2017 |
| Advantek Engineering AS | Kristiansand S | 2008 |
| Advaxa AS | Asker | 2016 |
| Advb Holding AS | Oslo | 2024 |
| Advenge Consulting AS | Oslo | 2012 |
| Adventor AS | Molde | 2026 |
| Adventure Capital AS | Nordfjordeid | 2022 |
| Adventure Event AS | Elverum | 2017 |
| Adventure Overland Gear AS | Nesbru | 2025 |
| Adventure Photo AS | Oslo | 2005 |
| Adventurecamper AS | Malm | 2024 |
| Advertize AS | Veavågen | 2022 |
| Adviat AS | Oslo | 2023 |
| Advice Accounting AS | Lierskogen | 2023 |
| Advice AS | Ørsta | 1999 |
| Advice Concept AS | Brumunddal | 2021 |
| Advice Consulting Group AS | Skien | 2021 |
| Advice Human Resources AS | Oslo | 2008 |
| Advice Innlandet AS | Brumunddal | 2012 |
| Advice IP AS | Stavanger | 2022 |
| Advice Lillehammer AS | Lillehammer | 2024 |
| Advice Management Consulting AS | Oslo | 1998 |
| Advice Norge AS | Brumunddal | 2021 |
| Advice Oslo AS | Brumunddal | 2021 |
| Advice Reklamebyrå AS | Brumunddal | 1986 |
| Advice Visuals AS | Brumunddal | 2021 |
| ADVICE4YOU AS | Stavanger | 2013 |
| Advicepeople HR Services AS | Moss | 2017 |
| Advicia AS | Oslo | 2007 |
| Advicon AS | Ulsteinvik | 2017 |
| Advis AS | Haugesund | 2018 |
| Advisa Steuerberatungsgesellschaft MBH | De-34117 Kassel | 2023 |
| Advise Reklamebyrå AS | Oslo | 2012 |
| Adviseit Nuf | Lier | 2006 |
| Advisense AS | Oslo | 2013 |
| Adviseo AS | Oteren | 2025 |
| Advisers AS | Oslo | 2024 |
| Advisetech AS | Oslo | 2019 |
| Advisi SA | Tønsberg | 2016 |
| Advisiant AS | Sandnes | 2026 |
| Advisir AS | Oslo | 2013 |
| Adviso Advokatfirma AS | Ålesund | 2012 |
| Adviso Consult AS | Strømmen | 2025 |
| Advisor Revisjon & Regnskap AS | Søreidgrend | 2005 |
| Advisors Moe AS | Moss | 2018 |
| Advisorwest AS | Kleppestø | 2017 |
| Advisum AS | Kjøpmannskjær | 1995 |
| Advitec AS | Lørenskog | 2025 |
| Adviva AS | Tverrelvdalen | 2025 |
| Advocator Advokatfirma AS | Ålesund | 2012 |
| Advokat Aabak AS | Hamar | 2019 |
| Advokat Anders Kjøren AS | Steinkjer | 2019 |
| Advokat Anders Stub Søtorp AS | Sandefjord | 2017 |
| Advokat Anna Therese Flatmo AS | Støren | 2018 |
| Advokat Anneli Bendiksen AS | Tromsø | 2015 |
| Advokat Annicken Iversen AS | Oslo | 2019 |
| Advokat Arvid Berentsen AS | Stavanger | 2020 |
| Advokat Arvid Sjødin AS | Stavanger | 2021 |
| Advokat Arvid Vamråk Mellingen Holding AS | Leikanger | 2018 |
| Advokat AS | Moss | 2008 |
| Advokat Axel Lange AS | Ålesund | 2019 |
| Advokat Bergesen AS | Hemsedal | 2005 |
| Advokat Birgit Vinnes AS | Oslo | 2013 |
| Advokat Birgitte G Eknes AS | Bergen | 2020 |
| Advokat Bjørn Kristian Storli AS | Bodø | 2025 |
| Advokat Bjørn L G Braathen AS | Tønsberg | 1999 |
| Advokat Bjørn O. Øiulfstad AS | Oslo | 2021 |
| Advokat Bjørn Soltvedt AS | Stabekk | 1990 |
| Advokat Bjørnar Håland AS | Sandefjord | 2018 |
| Advokat Bjørndal AS | Haugesund | 2019 |