| Brua Fysikalske Eiendom AS | Real estate | 2008 |
| Brødrene Skaug Eiendom AS | Real estate | 2026 |
| Brødrene Skaug Holding AS | Real estate | 2022 |
| BTM AS | Real estate | 2006 |
| Bygarasjen Værstetorvet AS | Real estate | 2022 |
| Byggtjenesten AS | Construction | 2010 |
| Byhaven 1 AS | Real estate | 2023 |
| Böhmeister AS | | 2020 |
| Børretzen AS | Professional & scientific | 2024 |
| C My Choice AS | | 2021 |
| C-Kristiansen Holding AS | | 2025 |
| Cafe Fru B AS | Hospitality | 2024 |
| Capio Anoreksi Senter AS | Health & social care | 1999 |
| Capsloc AS | Professional & scientific | 2019 |
| Capt. Kane AS | Professional & scientific | 2009 |
| Capture Energy AS | Wholesale & retail | 2024 |
| Carl Strømberg Holding AS | | 2023 |
| Carrera Classic AS | Wholesale & retail | 2024 |
| Cathrine Holding AS | | 2023 |
| Cerberus Systems AS | Information & communication | 2024 |
| Chapter 11 AS | | 2023 |
| CHL Holding AS | Real estate | 2008 |
| Chrilica Eiendom AS | Real estate | 2017 |
| Chrilica Invest AS | Real estate | 2008 |
| Civis AS | Construction | 2011 |
| CLC Invest AS | Real estate | 2016 |
| CM Invest AS | | 2025 |
| Codemover AS | Information & communication | 2016 |
| Colinas AS | Professional & scientific | 2019 |
| Compary AS | Administrative & support | 2025 |
| Concentrix Norway AS | Administrative & support | 2003 |
| Concentrix Norway Consulting AS | Administrative & support | 2014 |
| Cornix Consulting AS | Information & communication | 2022 |
| CVW Holding AS | | 2026 |
| D.T.S Holding AS | Financial services | 2016 |
| Dachs for AS | Arts & recreation | 2022 |
| Dampskipsbrygga Eiendom AS | Real estate | 2019 |
| DC Dynamics AS | Professional & scientific | 2016 |
| Destinasjon Fredrikstad AS | Administrative & support | 2024 |
| Detchn Holding AS | | 2024 |
| Devik Brekke AS | Professional & scientific | 2018 |
| Didriksen Transport AS | Transport & logistics | 2024 |
| Din Hjelpetjeneste Da | Health & social care | 2005 |
| Direktør Hauges Vei 1 AS | Real estate | 2025 |
| Djupeklo Og Østre Oksrød Vann- Og Avløpslag SA | Water & waste | 2011 |
| Dormy Golf Norway AS | Wholesale & retail | 2018 |
| Doro AB | Professional & scientific | 2008 |
| Doro AS | Wholesale & retail | 1983 |
| Double a Invest AS | | 2024 |
| DR. Aasbø AS | Health & social care | 2016 |
| Drange & Delli AS | Information & communication | 2023 |
| Dreieværste AS | Real estate | 2019 |
| Drivhuset Østfold AS | Professional & scientific | 2012 |
| DS Entreprenør AS | Construction | 2009 |
| Duenes Eiendom AS | Real estate | 2022 |
| E.Jordal AS | Professional & scientific | 2024 |
| Earthtree Media AS | Information & communication | 2008 |
| Easyzeek AS | Professional & scientific | 2018 |
| Edgar Bøckmann AS | Financial services | 2013 |
| Eftang Va AS | Water & waste | 2015 |
| Eg Murservice AS | Construction | 2024 |
| Eggjavegen 14 AS | Real estate | 2024 |
| Eiendomsselskapet Custodia AS | Real estate | 2023 |
| EIENDOMSTAKST1 AS | Professional & scientific | 2020 |
| Eimskip Island Ehf Nuf | Transport & logistics | 2010 |
| Einar Holding AS | Financial services | 2014 |
| Eiriks Holding AS | | 2019 |
| Ek Nilsen Invest AS | | 2026 |
| Elmobile Eiendom AS | Real estate | 2023 |
| Elva AS | Information & communication | 2020 |
| Elveli AS | Real estate | 2011 |
| Emegling AS | Real estate | 2024 |
| Emt Engineering AB Nuf | Professional & scientific | 2023 |
| Energiaktuelt AS | Information & communication | 2020 |
| Enerlytics AS | Information & communication | 2025 |
| Engebretsen Eiendom AS | Real estate | 2013 |
| Enhuuskilen Vann Og Avløpslag SA | Water & waste | 2007 |
| Entusio AS | Administrative & support | 2001 |
| Enzo Finance AS | Professional & scientific | 2018 |
| Estate Kirkebrygga Eiendom AS | Real estate | 1990 |
| Exakt Holding AS | Professional & scientific | 2009 |
| Fabco AS | Other services | 2018 |
| Fagerheim Consulting AS | Professional & scientific | 2017 |
| Fallang Fjellsprengning AS | Construction | 2013 |
| Fallang Holding AS | Administrative & support | 2005 |
| Farselskap AS | | 2023 |
| Fastlegene Holding AS | | 2023 |
| Fatnes Dagligvare AS | Wholesale & retail | 2020 |
| Feedforward AS | Information & communication | 2022 |
| Femtegjeld Stall & Utleie AS | Real estate | 2024 |
| Fib Invest AS | | 2021 |
| Filias Management AS | Professional & scientific | 2013 |
| Filius AS | Real estate | 2005 |
| Finansbevis AS | Real estate | 2024 |
| Firemannsvilla AS | Real estate | 1919 |
| Firemannsvilla Holding AS | | 2026 |
| Fit for Fight Norge AS | Arts & recreation | 2013 |
| Fivelius Holding AS | Real estate | 2024 |
| Fjellheim Samfunnshus SA | Real estate | 2013 |
| Fjellveien 51 AS | Real estate | 2021 |