| 01 Capital AS | | 2026 |
| 1099 Management Da | Information & communication | 2012 |
| 13B Interactive Da | Information & communication | 2025 |
| 13B Productions AS | Information & communication | 2026 |
| 1473 Invest AS | | 2023 |
| 1534 Crowns AS | Wholesale & retail | 2023 |
| 1711 Invest AS | | 2025 |
| 1852 Holding AS | | 2021 |
| 1909 Invest AS | | 2020 |
| 1975 Holding AS | Arts & recreation | 2019 |
| 2020 Holding AS | | 2022 |
| 22B Mestring AS | Hospitality | 2020 |
| 24 Only AS | Real estate | 2020 |
| 2AASEN AS | Professional & scientific | 2023 |
| 2B IT AS | Professional & scientific | 2018 |
| 2CREATE AS | Professional & scientific | 2016 |
| 2H Holding AS | | 2025 |
| 2J Holding AS | Professional & scientific | 2018 |
| 2MINITZ AS | Information & communication | 2012 |
| 2ND Choice Media Da | Information & communication | 2015 |
| 3 T Pirbadet AS | Arts & recreation | 2000 |
| 30EAST AS | Information & communication | 2017 |
| 365 Fri AS | Real estate | 2006 |
| 3B Prosjekt AS | Real estate | 2017 |
| 3C Utvikling AS | Financial services | 2012 |
| 3D Motion Technologies AS | Professional & scientific | 2012 |
| 3I Kapital AS | | 2024 |
| 3K6 Skoginvest AS | Financial services | 2023 |
| 3LOG Ans | Real estate | 2013 |
| 3RIV AS | Professional & scientific | 2005 |
| 3T Solsiden AS | Arts & recreation | 2009 |
| 3X Energy AS | | 2026 |
| 4478 Holding AS | | 2026 |
| 4FAG AS | Construction | 2019 |
| 4TUNE AS | | 2018 |
| 4X4 Medex AS | Health & social care | 2017 |
| 4X4 Medicine AS | Education | 2013 |
| 5STI Holding AS | | 2026 |
| 6 Hour AS | Information & communication | 2023 |
| 6812 Holding AS | Construction | 2017 |
| 6AM Accelerator AS | Professional & scientific | 2013 |
| 7070 Invest AS | Transport & logistics | 2018 |
| 99X Increo AS | Information & communication | 2000 |
| A Development AS | Real estate | 2020 |
| A Eggen AS | Wholesale & retail | 1932 |
| A Helberg Consulting AS | Professional & scientific | 2026 |
| A Helberg Holding AS | Real estate | 2009 |
| A Helgesen AS | Real estate | 2005 |
| A Helgesen Eiendom AS | Real estate | 1973 |
| A Helland Transport AS | Transport & logistics | 1998 |
| A M Aagaard AS | Wholesale & retail | 1993 |
| A Martinsen Logistics AS | Transport & logistics | 2023 |
| A Pluss Bygg AS | Construction | 2025 |
| A Sandkjernan AS | Real estate | 1952 |
| A Skaug Transport AS | Transport & logistics | 1990 |
| A&V Partners AS | Administrative & support | 2026 |
| A-Lageret AS | Real estate | 2025 |
| A-Sg AS | Real estate | 2022 |
| A. Djønne AS | Professional & scientific | 2025 |
| A. F. Wigen AS | Wholesale & retail | 2005 |
| A. Jenssen Invest AS | | 2018 |
| A. Munkhaugen AS | | 2024 |
| A. R. Holding AS | Financial services | 2005 |
| A. Sivertsen Holding AS | Construction | 2021 |
| A. Ydse Holding AS | Construction | 2022 |
| A.B Invest AS | | 2024 |
| A.B.H Holding AS | | 2023 |
| A.Johansen Invest AS | Real estate | 2021 |
| A.M.F. Invest AS | | 2022 |
| A.R. Invest AS | Financial services | 2005 |
| A/S Tråika | Real estate | 1985 |
| A/S Viktor Baumannsvei 34-38 | Households | 1975 |
| A/S Voldsminde VII | Households | 1954 |
| A6 Eiendom AS | Real estate | 2006 |
| Aabl AS | | 2024 |
| Aafag Eiendom AS | Construction | 2008 |
| Aagaard Dronningensgate AS | Wholesale & retail | 1995 |
| Aagaard Engros AS | Wholesale & retail | 1995 |
| Aagaard Holding AS | Wholesale & retail | 2013 |
| Aagaard Management AS | Wholesale & retail | 2013 |
| Aalberg & Kattem Ans | Construction | 1995 |
| Aalmo AS Autorisert Elektroentreprenør | Construction | 1991 |
| Aalmo El & Sceneteknikk AS | Construction | 2020 |
| Aam Grimsmo Holding AS | | 2025 |
| Aamo Invest AS | Financial services | 2016 |
| Aamo Revisjon AS | Professional & scientific | 2005 |
| Aardahl AS | Wholesale & retail | 2010 |
| Aardahl Eiendom AS | Real estate | 2012 |
| Aardal Capita AS | | 2015 |
| Aarskog Eiendomsforvaltning AS | Real estate | 2020 |
| Aarsleff Rail AS | Construction | 2020 |
| Aarsleff Rail Nuf | Construction | 2017 |
| Aarstein Holding AS | Financial services | 2007 |
| Aasmo Holding AS | | 2026 |
| Aass Stasjonsdrift AS | Wholesale & retail | 2013 |
| Aath Holding AS | | 2020 |
| Aavf AS | | 2024 |
| AB Hofstad Invest AS | | 2024 |
| AB Takst - Aktiv Boligtaksering AS | Professional & scientific | 2006 |
| Abacus AS | Professional & scientific | 1998 |