| 1940 Holding AS | Construction | 2018 |
| 1954 Invest AS | Real estate | 2017 |
| 2T Entreprenør AS | Construction | 2023 |
| 2T Invest AS | Real estate | 2024 |
| A. Næss Maskin AS | Construction | 2020 |
| Aages Bakeri & Konditori AS | Manufacturing | 1993 |
| Aarstad & Sønner AS | | 1989 |
| Aarstad Bygg Consult AS | Wholesale & retail | 2013 |
| Abu 1 AS | Real estate | 2019 |
| Abu 2 AS | Real estate | 2019 |
| Abu 3 AS | Real estate | 2019 |
| Abu 4 AS | Real estate | 2019 |
| Abu 5 AS | Real estate | 2019 |
| Adtech Solutions AS | Wholesale & retail | 2022 |
| Aesto AS | Wholesale & retail | 2023 |
| Akershus Bygg & Boligservice AS | Construction | 2008 |
| Akershus Tak AS | Construction | 2025 |
| Alpe AS | Construction | 2012 |
| Altiservice AS | Administrative & support | 2024 |
| Ambu AS | | 2022 |
| Amtrex AS | | 2025 |
| Amundrød Stenindustri AS | Manufacturing | 2007 |
| Andel B11 AS | Real estate | 2014 |
| Anitas Klær Ans | Wholesale & retail | 2001 |
| Ans Fred Og Eriks Rent & Pent | Administrative & support | 1988 |
| Anton H Mysens Gate 17 AS | Real estate | 2022 |
| Arkania Invest AS | | 2017 |
| Arko Entreprenad Aktiebolag | | 1996 |
| Arne K Lier AS | Construction | 2017 |
| AS Indre Akershus Blad | Information & communication | 1936 |
| AS Østre Skansen | Real estate | 1978 |
| Atelier Herman AS | Professional & scientific | 1969 |
| Aurskog Høland Bygdeservice SA | Administrative & support | 1977 |
| Aurveien 62 AS | Real estate | 2024 |
| Aurveien 70 AS | Real estate | 2019 |
| Axesso Nuf | Professional & scientific | 2004 |
| B-S Regnskap AS | Professional & scientific | 2007 |
| BBV Kjøp Da | Wholesale & retail | 1981 |
| BG Enterprises AS | Wholesale & retail | 2015 |
| Bifs Holding AS | Financial services | 2024 |
| Big Dream Arena AS | Arts & recreation | 2019 |
| Big Dream Steakhouse AS | Hospitality | 2021 |
| Bigs AS | Financial services | 2018 |
| Biltorget Bjørkelangen AS | Wholesale & retail | 2023 |
| Bitsit AS | Information & communication | 2020 |
| BJ HR Consulting AS | Professional & scientific | 2015 |
| Bjørkelangen Apartment AS | Hospitality | 2014 |
| Bjørkelangen Bilpleie AS | Other services | 2024 |
| Bjørkelangen Bilservice AS | Other services | 2022 |
| Bjørkelangen Bilservice Holding AS | Other services | 2022 |
| Bjørkelangen Blomster AS | Wholesale & retail | 2022 |
| Bjørkelangen Boligforvaltning AS | Real estate | 2015 |
| Bjørkelangen Boligutvikling AS | Real estate | 2006 |
| Bjørkelangen Dyreklinikk AS | Professional & scientific | 2003 |
| Bjørkelangen Eiendom AS | Real estate | 2024 |
| Bjørkelangen Maskin AS | Wholesale & retail | 1984 |
| Bjørkelangen Medisinske Senter Da | Health & social care | 2004 |
| Bjørkelangen Minilager AS | Real estate | 2019 |
| Bjørkelangen Pizza AS | Hospitality | 2019 |
| Bjørkelangen Sentrumsutvikling AS | Real estate | 2019 |
| Bjørkelangen Sport AS | Wholesale & retail | 1983 |
| Bjørkelangen Trafikkskole AS | Education | 2020 |
| Bjørkeveien 18 AS | Real estate | 2005 |
| Bjørknes Consulting AS | Information & communication | 2023 |
| Bjørnebråten Holding AS | | 2019 |
| Blekkhuset AS | Information & communication | 1995 |
| Blikkenslager Anders Kise AS | Construction | 2016 |
| Blinken Holding AS | Professional & scientific | 2005 |
| Blinken Senter AS | Real estate | 2007 |
| Blowtech GT AS | Manufacturing | 2009 |
| BMS Elektro AS | Construction | 2015 |
| BR Nordby AS | Real estate | 2000 |
| Brand(T)Fabrikken AS | Professional & scientific | 2015 |
| Briskebyen Eiendomsutvikling AS | Real estate | 2019 |
| Brødr Litzheim AS | Construction | 1994 |
| Bsu Holding AS | Real estate | 2023 |
| BT Bilberging & Transport AS | Transport & logistics | 2019 |
| BT Bygg AS | Construction | 2019 |
| BTM Eiendom AS | Real estate | 2022 |
| Budskredder'N Ans | Transport & logistics | 1996 |
| Butikkdrift Rudshavn AS | Wholesale & retail | 2023 |
| Bygg Med Oss AS | Real estate | 2007 |
| Byggmester Johan Nadden Eftf AS | Construction | 1998 |
| Chaseco AS | Other services | 2023 |
| CHT Bygg AS | Real estate | 2016 |
| Cipax Norge AS | Manufacturing | 2021 |
| Cland Invest AS | Information & communication | 2017 |
| Classic Bygg AS | Construction | 2016 |
| Covera AS | | 2025 |
| Crosshjørnet AS | Manufacturing | 2000 |
| Damtjern Kapital Og Eiendom AS | Real estate | 2016 |
| Daniel Ekeberg AS | Health & social care | 2014 |
| Debio Marked AS | Education | 2015 |
| Dela Drop AS | Information & communication | 2020 |
| Den Du Trenger AS | Arts & recreation | 2024 |
| Diseth AS | | 2020 |
| Dra Taxi AS | Transport & logistics | 2024 |
| Drew Holding AS | Information & communication | 2020 |
| Drusiti Invest AS | Professional & scientific | 2025 |
| Duong Dagligvare AS | Wholesale & retail | 2022 |