| 123 Sushi 2 AS | Hospitality | 2024 |
| 3P Holding AS | Transport & logistics | 2020 |
| 3P Logistikk AS | Transport & logistics | 2013 |
| 3P Transport AS | Transport & logistics | 2020 |
| 4SEASONS Weddings AS | Arts & recreation | 2016 |
| A Drop of Norway AS | | 2026 |
| A Fjeldstad AS | Real estate | 1973 |
| A Restaurant AS | Hospitality | 2025 |
| A&H Frisør AS | Other services | 2020 |
| A&H Holding AS | Real estate | 2021 |
| A&L Transport AS | Transport & logistics | 2026 |
| A&V Invest AS | Financial services | 2018 |
| A.Bratt AS | | 2023 |
| Aam Takst AS | Real estate | 2023 |
| Abacus Norge AS | Wholesale & retail | 2009 |
| Abc Restaurant AS | Hospitality | 2018 |
| Ac Invest Holding AS | Information & communication | 2020 |
| Adam Bygg AS | Construction | 2018 |
| Adam Og Eva Strømmen AS | Other services | 2022 |
| Adviso Consult AS | Professional & scientific | 2025 |
| Advokat Olga Halvorsen AS | Professional & scientific | 2025 |
| Advokatfirmaet Shah AS | Professional & scientific | 2016 |
| AI Support AS | Information & communication | 2024 |
| Aj Bygg Mester AS | Construction | 2025 |
| Aj Bygg Service Entreprenør AS | Construction | 2020 |
| Ak Kvalitet Eiendom Da | Real estate | 2023 |
| Akershus Eiendomservice AS | Administrative & support | 1995 |
| Aksjeselskapet Mira | Professional & scientific | 2000 |
| Aktivitetshuset Staals AS | Arts & recreation | 1991 |
| Alexander Tut Og Kjør AS | Transport & logistics | 2026 |
| All Eiendom Tana AS | Real estate | 2012 |
| Alle Dager AS | Wholesale & retail | 2012 |
| Alliansen AS | Administrative & support | 2012 |
| Alliansen Bemanning Og Rekruttering AS | Administrative & support | 2025 |
| Amara Holdning AS | Real estate | 2019 |
| Andre Paulsen Holding AS | Administrative & support | 2023 |
| André Andreassen Holding AS | Financial services | 2005 |
| Angel Nails Strømmen AS | Other services | 2008 |
| Angel Nails Supply AS | Other services | 2020 |
| Annila AS | Wholesale & retail | 2015 |
| Anov Consulting AS | Professional & scientific | 2018 |
| Anvitha AS | Professional & scientific | 2026 |
| Apfp Invest AS | | 2025 |
| Apotek 1 Skjettentoppen AS | Wholesale & retail | 2021 |
| Aquilo Travels Da | Administrative & support | 2003 |
| Arcadian AS | Hospitality | 2021 |
| Areso AS | Information & communication | 2026 |
| Arisa Company AS | Other services | 2026 |
| Arne R Kristiansen AS | Hospitality | 2015 |
| Aromaterapi & Thaimassasje AS | Other services | 2015 |
| Arshad Invest AS | | 2020 |
| Artko AS | Administrative & support | 1997 |
| Asian Sushi Og Wok AS | Hospitality | 2023 |
| Ask & Embla Frisørstudio AS | Other services | 2012 |
| Aspendos Ans | Hospitality | 1991 |
| Astute AS | Information & communication | 2023 |
| Aud's Undertøysalong AS | Wholesale & retail | 2012 |
| Autoaero AS | Wholesale & retail | 2023 |
| Autoexperts AS | Other services | 2024 |
| Autolux Bilsenter AS | Wholesale & retail | 2024 |
| Avvio Trafikkskole AS | Education | 2018 |
| Azrafrisør AS | Other services | 2021 |
| B&F Holding Lillestrøm AS | | 2025 |
| B&F Investco AS | | 2026 |
| B&W Kreativ AS | Professional & scientific | 2021 |
| Backlash AS | Financial services | 2017 |
| Bah Invest AS | | 2026 |
| Bak Maskiner AS | Wholesale & retail | 2025 |
| Baker Rahim AS | Manufacturing | 2022 |
| Bamarni AS | Health & social care | 2025 |
| Banktorget Næring 1 AS | Real estate | 2016 |
| Banktorget Næring 2 AS | Real estate | 2016 |
| Banktorget Næring 3 AS | Real estate | 2016 |
| Bare Hage AS | Administrative & support | 2024 |
| Bedrift Og Kontor Interiør AS | Wholesale & retail | 1993 |
| Belinki AS | Financial services | 2018 |
| Bendix Solar AS | Wholesale & retail | 2023 |
| Berge AS | Construction | 2020 |
| Berge Håndverk AS | Construction | 2018 |
| Best Price AS | Wholesale & retail | 1990 |
| BHX Norge AS | Wholesale & retail | 2017 |
| Bilhandel AS | Wholesale & retail | 2023 |
| Bippat Strømmen AS | Hospitality | 2016 |
| Birkett AS | Professional & scientific | 2017 |
| Bislett Mini AS | Construction | 2020 |
| Bitrate Invest AS | | 2018 |
| Bizsupport AS | Professional & scientific | 2024 |
| Bkholding AS | | 2025 |
| Blom & Fossan AS | Professional & scientific | 2025 |
| BNL Rørlegger Bedrift AS | Construction | 2025 |
| Bojedla Invest AS | | 2025 |
| Boligledelse AS | Professional & scientific | 2019 |
| Bra Tjenester AS | Transport & logistics | 2024 |
| Bråte Gård AS | Real estate | 2024 |
| Bråthen Trading AS | Real estate | 2013 |
| Brødrene Vik Eiendomutleie Da | Real estate | 2014 |
| Brøter Terrasse Næring AS | Real estate | 2022 |
| Bu 3N AS | Real estate | 2014 |
| Butikkdrift Ayad Bendy AS | Wholesale & retail | 2022 |
| Byen Technology AS | Information & communication | 2026 |