| A Kapital AS | Financial services | 2016 |
| A. B. Jenssen Holding AS | | 2018 |
| Aadland Group AS | Financial services | 2014 |
| Aaon Holding AS | Financial services | 2016 |
| Aase Be AS | Arts & recreation | 2024 |
| Ab/Kg Holding AS | | 2022 |
| Abc Regnskapsbyrå AS | Professional & scientific | 2009 |
| Accello AS | Professional & scientific | 2005 |
| Active Mom Wear AS | Wholesale & retail | 2025 |
| Adam Og Jakob AS | Hospitality | 2025 |
| Addpoint AS | Information & communication | 2015 |
| Aderika AS | | 2021 |
| Adserø Bil AS | Wholesale & retail | 2015 |
| Adserø Bilverksted AS | Other services | 2014 |
| Advance AS | Professional & scientific | 2019 |
| Aeroworks AS | Manufacturing | 2025 |
| Aflektai AS | Information & communication | 2026 |
| Agenda Transport AS | Real estate | 2003 |
| Agri-Drone AS | Professional & scientific | 2024 |
| Ahs Kurs AS | Education | 2013 |
| Aibi AS | Information & communication | 2025 |
| Aie J Invest AS | | 2023 |
| Aigi AS | Professional & scientific | 2017 |
| Airam AS | Real estate | 2005 |
| Airam Eiendom AS | Real estate | 2007 |
| Aisee Consulting AS | Professional & scientific | 2023 |
| Aisee Holding AS | Professional & scientific | 2022 |
| Aivance AS | Information & communication | 2023 |
| Aktiva Bygg AS | Real estate | 2007 |
| Albert & Værnes Flyttebyrå AS | Transport & logistics | 2023 |
| All Remove Trondheim AS | Construction | 2003 |
| Allegra 48 AS | Real estate | 2021 |
| Alokera AS | Information & communication | 2022 |
| Alpion Holding AS | | 2026 |
| Alprojects Norge AS | Professional & scientific | 2020 |
| Alt Bygg AS | Construction | 1992 |
| Amatech AS | Professional & scientific | 2024 |
| Anbre-Holding AS | | 2025 |
| Anne Mette Knutsen Holding AS | Real estate | 2017 |
| Anne-Lene Langøy Holding AS | | 2021 |
| Anser AS | Information & communication | 2012 |
| Apelco AS | Construction | 2015 |
| Apex Quantum AS | Real estate | 2018 |
| Ar-Invest AS | Professional & scientific | 2005 |
| Arbeidmatch Norge AS | Administrative & support | 2025 |
| Area Invest AS | Real estate | 2024 |
| Arktos Invest AS | Manufacturing | 2025 |
| Arktous AS | Professional & scientific | 2021 |
| Arnstein's Eiendomsservice AS | Real estate | 2005 |
| Askeladden Ranheim AS | Real estate | 1997 |
| Aspmo Finans AS | Financial services | 2014 |
| Astronomia AS | | 2021 |
| At Eiendomsutvikling AS | Real estate | 2013 |
| Aurora Holding AS | Real estate | 2010 |
| Aurora Trading AS | Wholesale & retail | 2011 |
| Austurcone AS | Professional & scientific | 2024 |
| Avaek Holding AS | | 2019 |
| Avia Technology AS | Professional & scientific | 2015 |
| B.A. Tangen AS | Administrative & support | 2021 |
| Bad Og Rehabilitering AS | Construction | 2015 |
| Bad Plans Da | Wholesale & retail | 2015 |
| Bagheera AS | Real estate | 2005 |
| Bagøien AS | Real estate | 2005 |
| Bakkehelle 5 AS | Real estate | 2019 |
| Ballsund AS | | 2025 |
| Bargeld Invest AS | Financial services | 2014 |
| Baris Capital AS | Professional & scientific | 2023 |
| Baris Entertainment AS | Professional & scientific | 2023 |
| Basthe Invest AS | | 2016 |
| Beachsenter Trondheim AS | Real estate | 2020 |
| Beat Capital AS | Professional & scientific | 2015 |
| Bekry Holding AS | | 2022 |
| Bemo Eiendom AS | Wholesale & retail | 2005 |
| Berge Consult AS | Professional & scientific | 2024 |
| Berghriksen Holding AS | Professional & scientific | 2017 |
| Bernhard Moe AS | Wholesale & retail | 2017 |
| Bernhard Moe Holding AS | Wholesale & retail | 2017 |
| Bernt Sandstad AS | Financial services | 2014 |
| Beyonc AS | Professional & scientific | 2021 |
| Bhtp AS | | 2025 |
| Biff Holding AS | Real estate | 2020 |
| Bilbutikken Trondheim AS | Wholesale & retail | 2013 |
| Bioshield AS | Professional & scientific | 2023 |
| Bjarne H. Hanssen AS | | 2010 |
| Bjef AS | Real estate | 2007 |
| Bli Optimal AS | Health & social care | 2021 |
| Blikkenslager T. Hågensen AS | Construction | 2005 |
| Blusuvoll Alle 5 AS | Real estate | 2013 |
| BM Tjenester AS | Real estate | 2016 |
| Bo-Design AS | Professional & scientific | 2026 |
| Boligbyggern Orkdal AS | Real estate | 2017 |
| Boligbyggern Selbu AS | Real estate | 2018 |
| Boligbyggern Trysil AS | Real estate | 2021 |
| Boligutvikling Ulstad AS | Real estate | 2016 |
| Bookhus Norge AS | Information & communication | 2014 |
| Borealis Kapital AS | | 2026 |
| Brainchild AS | Education | 1999 |
| Brat AS | | 2025 |
| Brattøra Snekkeri AS | Manufacturing | 2013 |
| BRB Asset Management AS | | 2025 |