| 10TH Music Da | Arts & recreation | 2017 |
| 69 North Concept AS | Professional & scientific | 2026 |
| 69 North Holding AS | | 2022 |
| A.Y Invest AS | Financial services | 2015 |
| A/M Team Renhold AS | Administrative & support | 2023 |
| A3DA AS | Professional & scientific | 2026 |
| Aasnes Holding AS | Financial services | 2005 |
| Aca Forvaltning AS | Real estate | 2015 |
| Adenin AS | Wholesale & retail | 2023 |
| Adlevo Tech Holding AS | Information & communication | 2020 |
| Air Service Tromsø Nuf | Administrative & support | 2006 |
| Aj Service AS | Wholesale & retail | 2008 |
| Alf Isaksen Maskin AS | Construction | 2008 |
| Alfa Revisjon AS | Professional & scientific | 1994 |
| Alfheim Living AS | Real estate | 2026 |
| Allegro Fergekroa AS | Hospitality | 2020 |
| Allegro Pyramiden AS | Hospitality | 2014 |
| Allegro Tromsdalen AS | Hospitality | 2013 |
| Amarone Holding AS | Professional & scientific | 2005 |
| Andre Krause - Arkitektur AS | Professional & scientific | 2023 |
| Andreassen Bygg AS | Construction | 2015 |
| Andreassen Bygg Og Eiendom AS | Real estate | 2013 |
| Angelika Pizyk Holdingselskap AS | | 2023 |
| Anne Helen Hansen AS | Financial services | 2005 |
| Anton Jakobsens Vei 1 AS | Real estate | 2009 |
| Arctic Digcon AS | Information & communication | 2024 |
| Arctic Eiendomsservice AS | Administrative & support | 2010 |
| Arctic Glow AS | Arts & recreation | 2024 |
| Arctic Light Products AS | Wholesale & retail | 2010 |
| Arctic Mascot AS | Administrative & support | 2013 |
| Arctic World Tromsø AS | Arts & recreation | 2025 |
| Arcticum AS | Real estate | 2024 |
| Ark Group AS | Transport & logistics | 2025 |
| Arve Holding AS | Construction | 2017 |
| Asbjørn Hansen Invest AS | Real estate | 2004 |
| Asfalttjenesten AS | Construction | 2006 |
| Asko Nord AS | Wholesale & retail | 1998 |
| Aspvik Trade Group AS | Wholesale & retail | 2025 |
| Asset Service AS | | 2026 |
| Atw Bolig AS | Real estate | 2023 |
| Augustin Holding AS | | 2019 |
| Aurelion AS | Hospitality | 2026 |
| Austad Austad AS | Professional & scientific | 2016 |
| Authentic North AS | Administrative & support | 2023 |
| Awena AS | Professional & scientific | 2009 |
| B Jenssen Tranpsport AS | Transport & logistics | 2025 |
| B. Schøning AS | Financial services | 2018 |
| Bak Skjermen AS | Information & communication | 2026 |
| Baro Capital AS | | 2026 |
| Bastet Holding AS | | 2023 |
| Beate Invest AS | | 2022 |
| Bengts Bistro AS | Manufacturing | 2023 |
| Berg Barnehage SA | Education | 1989 |
| Bergvoll SA | Real estate | 1995 |
| Bertelsen Yachting AS | Administrative & support | 2026 |
| Betong LWB. AS | Construction | 2025 |
| Bigmo Invest AS | | 2022 |
| Bilservice Tromsdalen AS | Other services | 1999 |
| Biltrend AS | Real estate | 1998 |
| Biltrend Eiendom Tromsø AS | Real estate | 2007 |
| Biltrend Tromsø AS | Wholesale & retail | 1988 |
| Bioregion Arktis SA | Professional & scientific | 2024 |
| Bitbekk Da | Information & communication | 2010 |
| Bjerke Snekkerisalg AS | Wholesale & retail | 1985 |
| BK Nor Ans | Professional & scientific | 1992 |
| Blekkhuset Tromsø AS | Wholesale & retail | 2004 |
| Body Studio Shop AS | Wholesale & retail | 2023 |
| Boligspar AS | Real estate | 1996 |
| Boreal Quest Ans | Administrative & support | 2024 |
| Bower Services AS | Information & communication | 2018 |
| Bredrup Invest AS | Financial services | 2008 |
| Brial Sikkerhetssystemer Da | Construction | 2010 |
| Brødrene Rajchelt AS | Construction | 2022 |
| By U'N Mi AS | Professional & scientific | 2014 |
| Bygg & Betong Teknikk AS | Construction | 2018 |
| Bygg Teknisk Forvaltning AS | Administrative & support | 2024 |
| Båtservice Tromsø AS | Transport & logistics | 2022 |
| Casita Arctic Experience AS | Administrative & support | 2025 |
| Casita Invest AS | Transport & logistics | 2023 |
| Chaiyo AS | Hospitality | 2016 |
| Chrisma AS | Agriculture & fishing | 2002 |
| Chrisma Eiendom AS | Agriculture & fishing | 2003 |
| Christom AS | Wholesale & retail | 2005 |
| Ckl-Invest AS | | 2023 |
| Cnor | Professional & scientific | 2019 |
| Complett Vask AS | Administrative & support | 2021 |
| Contur Holding AS | Real estate | 2005 |
| Conveo AS | Professional & scientific | 2024 |
| Cous Holding AS | Hospitality | 2022 |
| Da Søco Jonny Sørensen & Co | Administrative & support | 1987 |
| Dagli AS | Financial services | 2012 |
| Dalen Familiebarnehage AS | Education | 2023 |
| Damaskus Kebab AS | Hospitality | 2018 |
| Dan Johansen Trafikkskole AS | Education | 2017 |
| Darres Gate Ventures AS | Professional & scientific | 2021 |
| Data Bistand AS | Information & communication | 1993 |
| Davvi AS | Hospitality | 2025 |
| Dekksentralen AS | Wholesale & retail | 2004 |
| Devsquad AS | Information & communication | 2023 |
| Diner Nord AS | Wholesale & retail | 1994 |