| A. a Dagligvare AS | Wholesale & retail | 2022 |
| A. a. Hagen AS | | 2021 |
| A. Beckmann Holding AS | Construction | 2005 |
| A. Birkeland Holding AS | | 2024 |
| A. C. Perchs Thehandel Norge AS | Wholesale & retail | 2014 |
| A. Celik Holding AS | | 2020 |
| A. Eiendom AS | Real estate | 2004 |
| A. Finstad Holding AS | | 2025 |
| A. Gull Eiendom AS | Real estate | 2006 |
| A. Hansen Gruppen AS | Construction | 1992 |
| A. Hoem Holding AS | Financial services | 2017 |
| A. Hokholt Arkitekter AS | Professional & scientific | 2005 |
| A. Holder AS | Financial services | 2016 |
| A. Jørgensen Holding AS | | 2020 |
| A. Løknes Holding AS | | 2025 |
| A. Marthinsen Invest AS | | 2026 |
| A. Rekdal Holding AS | | 2021 |
| A. Riddervold AS | Information & communication | 2026 |
| A. Riddervold Holding AS | | 2026 |
| A. Ræder Invest AS | | 2019 |
| A. Rømcke Holding AS | | 2021 |
| A. Solberg Invest AS | | 2020 |
| A. Sport AS | Wholesale & retail | 1996 |
| A. Strømsnes Holding AS | | 2026 |
| A. Strømsnes Transport AS | Transport & logistics | 2026 |
| A. Sunde Capital AS | | 2017 |
| A. Sunde Invest AS | | 2017 |
| A. Sæther Compagniet Eiendom AS | Real estate | 1999 |
| A. T. Kearney Limited | Professional & scientific | 2014 |
| A. T. Kearney Pte. Ltd | Professional & scientific | 2014 |
| A.B Eiendom AS | Real estate | 2010 |
| A.B.Maleservice AS | Construction | 2024 |
| A.B.W. AS | Information & communication | 2025 |
| A.Bugge Helse AS | Health & social care | 2022 |
| A.C.E Fashionstore AS | Wholesale & retail | 1994 |
| A.C.G. AS | Administrative & support | 2015 |
| A.E. Exspress Erdin Cehic | Transport & logistics | 2013 |
| A.F Eiendom AS | Real estate | 2016 |
| A.Fritt AS | Information & communication | 2025 |
| A.G. Holding AS | | 2026 |
| A.H Transport Da | Transport & logistics | 2024 |
| A.H.S Holding AS | | 2026 |
| A.Haavik AS | Professional & scientific | 2006 |
| A.Holm Holding AS | | 2026 |
| A.I.B AS | | 2022 |
| A.K. Lundberg AS | | 2024 |
| A.L Clean Handelsbolag | Construction | 2008 |
| A.M-Service AS | Transport & logistics | 2016 |
| A.N. Holding AS | | 2022 |
| A.N.C. Prestige Interiors AS | Construction | 2026 |
| A.N.F Trading International AS | Wholesale & retail | 2017 |
| A.R. Consulting AS | Professional & scientific | 1986 |
| A.R. Qureshi & Co. AS | Real estate | 2018 |
| A.S. Kvia Holding AS | Wholesale & retail | 2018 |
| A.S.G AS | | 2025 |
| A.S.G. AS | Professional & scientific | 2025 |
| A.S.K AS | Financial services | 2012 |
| A.T. Kearney (International) AG | Professional & scientific | 2014 |
| A.Z Byggspesialisten AS | Construction | 2025 |
| A/K Fitness AS | Arts & recreation | 2011 |
| A/S Ariel | Information & communication | 1987 |
| A/S Bøgaten 10 | Households | 1935 |
| A/S Eiendomsutvikling | Real estate | 1983 |
| A/S Enterprise | Real estate | 1948 |
| A/S Forma | Manufacturing | 1969 |
| A/S Fougstad gate 22 | Households | 1986 |
| A/S Frilin | Financial services | 1962 |
| A/S Grimstadgaten 23 | Households | 1929 |
| A/S Gabelsgate 40 | Households | 1934 |
| A/S Halo | | 1988 |
| A/S Hovinveien 7 og 9 | Households | 1949 |
| A/S Huse-Sporsem | Transport & logistics | 1988 |
| A/S Loco | Transport & logistics | 1959 |
| A/S Merkurgården | Real estate | 1930 |
| A/S Millenium | Professional & scientific | 1988 |
| A/S Maabe | Real estate | 1965 |
| A/S Magnus Bergsgate 6 | Households | 1930 |
| A/S Møllegaarden | Real estate | 1960 |
| A/S Polycorp | Real estate | 1988 |
| A/S Rep-Rek | Manufacturing | 1946 |
| A/S Svolderhus | | 1937 |
| A/S Skarv | Real estate | 1987 |
| A/S Sørensen Og Balchen | Wholesale & retail | 1969 |
| A/S Vivat | Real estate | 1938 |
| A1 Prima Regnskap AS | Professional & scientific | 1991 |
| A1 Property AS | Real estate | 2014 |
| A1 Security AS | Transport & logistics | 1998 |
| A1-3 Festningsallmenningen AS | Construction | 2012 |
| A10 Nyland Bjørvika AS | Real estate | 2008 |
| A11 Bjørvikautstikkeren AS | Real estate | 2008 |
| A19 Holding AS | | 2023 |
| A1CARE Norge AS | Administrative & support | 2016 |
| A2 Gruppen AS | Construction | 2022 |
| A20R Holding AS | | 2026 |
| A25N Holdings AS | Real estate | 2020 |
| A2D Travel & Concierge AS | Administrative & support | 2021 |
| A2N Holding AS | Real estate | 2012 |
| A2Z Eiendom AS | Real estate | 2022 |
| A2Z Graving Og Bygg AS | Professional & scientific | 2019 |
| A2Z Invest AS | Real estate | 2019 |