| 10XNORTH AS | Administrative & support | 2011 |
| 10XTROMSØ AS | Administrative & support | 2026 |
| 231M Capital AS | | 2024 |
| 247 Invests AS | | 2021 |
| A Million Pineapples Da | Arts & recreation | 2020 |
| Ab-Tømring Og Maling AS | Construction | 2020 |
| Abc Byggservice AS | Construction | 2025 |
| Abla AS | Real estate | 2022 |
| Active Tromso AS | Administrative & support | 2013 |
| Adventures AS | Administrative & support | 2025 |
| Aktiv-Partner AS | Administrative & support | 2008 |
| Aleksander AS | | 2026 |
| Alf Henrik AS | Agriculture & fishing | 2022 |
| Alfa Fritid AS | Wholesale & retail | 2021 |
| All-Tjeneste Holding AS | | 2026 |
| Alleie AS | Real estate | 2021 |
| Alltid Tørr Ved AS | Agriculture & fishing | 2026 |
| Alo Film AS | Information & communication | 2025 |
| Amberfish AS | Hospitality | 2017 |
| Andreassen Dental AS | Health & social care | 2023 |
| Anma Invest AS | | 2026 |
| Ann-Eva Storm AS | Education | 2020 |
| Anton Mikalsen AS | Wholesale & retail | 1985 |
| Anvi Holding AS | Hospitality | 2022 |
| Apex Tromsø AS | Arts & recreation | 2025 |
| Arctic Adventure Holding AS | Arts & recreation | 2016 |
| Arctic Adventure Tours AS | Arts & recreation | 2016 |
| Arctic Campers AS | Administrative & support | 2013 |
| Arctic Campers Temp AS | Administrative & support | 2025 |
| Arctic Experience AS | Administrative & support | 2014 |
| Arctic Fishing Sommarøy AS | Administrative & support | 2017 |
| Arctic Lodge Tromvik AS | Real estate | 2022 |
| Arctic Seaview AS | Administrative & support | 2026 |
| Arcticwild.No AS | Administrative & support | 2018 |
| Aron-Mat AS | Manufacturing | 1990 |
| Artic Multiservice AS | Construction | 2021 |
| Artic Økonomi AS | Professional & scientific | 2023 |
| Arvid Hansen Holding AS | Financial services | 2005 |
| AS Sjovoll AS | Construction | 2023 |
| As.S AS | | 2026 |
| Asap Sjåfør AS | Transport & logistics | 2012 |
| Asbjørn Selsbane AS | Agriculture & fishing | 1991 |
| Askepott Industri Renhold AS | Administrative & support | 2021 |
| Askepotts Renhold AS | Administrative & support | 2013 |
| Askepotts Renhold Og Vedlikehold AS | Administrative & support | 2025 |
| Atsjo AS | | 2022 |
| August R. Hansen Holding AS | Real estate | 2023 |
| Aurora Apartments AS | Real estate | 2018 |
| Aurora Fishing Adventures and Accommodations AS | Hospitality | 2025 |
| Aurora Panorama AS | Administrative & support | 2018 |
| Aurora Utvikling AS | Real estate | 2017 |
| Ax Holding AS | Agriculture & fishing | 2005 |
| B-B Kystfiske AS | Agriculture & fishing | 2026 |
| Bakland AS | Administrative & support | 2018 |
| Bakrattet AS | Transport & logistics | 2025 |
| Barentsfish AS | Agriculture & fishing | 2012 |
| Be Happy AS | Administrative & support | 2024 |
| Beauty by Jannerhansen AS | Wholesale & retail | 2020 |
| Bep Bygg AS | Construction | 2015 |
| Berntsa AS | Real estate | 2015 |
| Berntsen Byggservice AS | Construction | 2025 |
| Betongtransport Nord AS | Transport & logistics | 2009 |
| Between Breaths AS | Information & communication | 2025 |
| Big Boat AS | Transport & logistics | 2026 |
| Bil & Lakkservice AS | Wholesale & retail | 2012 |
| Bjørkestad Holding AS | | 2021 |
| Bjørkli AS | Real estate | 2025 |
| BKW Maskin AS | Construction | 2016 |
| Blåmann Bygg AS | Construction | 2017 |
| Blåmann Maskin AS | Construction | 2013 |
| Blåst Invest AS | Real estate | 2020 |
| Boreal Yachting AS | Transport & logistics | 2011 |
| Brann Og Sikkerhet Tromsø AS | Education | 2024 |
| Brendeløkken AS | Arts & recreation | 2019 |
| Brodtkorb-Bjørklund AS | Health & social care | 2024 |
| Bryggejentene AS | Hospitality | 2013 |
| Built Entreprenør AS | Construction | 2022 |
| Bunker & Service AS | Wholesale & retail | 2014 |
| Burgerman Sentrum AS | Hospitality | 2018 |
| Burkow Invest AS | | 2026 |
| Byggco Nuf | Construction | 2011 |
| Båragutt AS | Agriculture & fishing | 1998 |
| Båragutt Havfiske AS | Agriculture & fishing | 2005 |
| Båragutt Pelagic AS | Agriculture & fishing | 2008 |
| Bård Ep Holding AS | Wholesale & retail | 2019 |
| Bøckmann Holding AS | | 2021 |
| Cariro AS | Professional & scientific | 2017 |
| Cariro Invest AS | | 2026 |
| Cava Holding AS | | 2020 |
| CBS Rørservice AS | Construction | 2025 |
| Cellin Byggtjenester AS | Construction | 2018 |
| Cervello Holding AS | Professional & scientific | 2009 |
| Claudius Holding AS | | 2025 |
| Creative Vacations AS | Arts & recreation | 2022 |
| Davka AS | | 2021 |
| DC Consulting AS | Professional & scientific | 2018 |
| Dronebedrift Ans | Information & communication | 2018 |
| Dykkerservice Nord AS | Education | 2020 |
| E. Johansen AS | | 2019 |
| Ebeltoft Byggservice AS | Construction | 2021 |