| Celphi Invest AS | | 2021 |
| Chimera Fisking AS | Wholesale & retail | 2026 |
| CHJ Invest AS | | 2022 |
| Christiania Elektrikerbedrift AS | Construction | 2020 |
| CJ Company AS | Professional & scientific | 2016 |
| Cliniq'En AS | Other services | 2009 |
| CMM Kapital AS | | 2019 |
| Color Optics AS | Real estate | 2019 |
| Compassio AS | Financial services | 2018 |
| Consulting People AS | Professional & scientific | 2011 |
| Controllweb AS | Wholesale & retail | 2014 |
| Coreness AS | Professional & scientific | 2022 |
| Corpomente AS | | 2018 |
| Correct Accounting AS | Professional & scientific | 2023 |
| Cotrack Crane AS | Transport & logistics | 2020 |
| Cotrack Group AS | | 2022 |
| Cotrack Rental AS | Administrative & support | 2026 |
| Cotrack Transportsentralen AS | Transport & logistics | 2022 |
| Crossfit Lillestrøm AS | Education | 2016 |
| Cryptic AS | Real estate | 2005 |
| Cvest Holding AS | Professional & scientific | 2020 |
| CZ Holding AS | Real estate | 2021 |
| Dambrua Studiokollektiv Da | Information & communication | 2024 |
| Damhaug Eiendom AS | Real estate | 2005 |
| Danial Invest AS | Hospitality | 2018 |
| Data Ascend AS | Information & communication | 2024 |
| Deal Band AS | Information & communication | 2024 |
| Delicious Delight AS | Hospitality | 2024 |
| Den Fjellhamar Bilpleie Da | Other services | 2009 |
| Diffr AS | Information & communication | 2020 |
| Digibrann AS | Information & communication | 2020 |
| Din Autopartner AS | Wholesale & retail | 2026 |
| Dincer Holding AS | Wholesale & retail | 2016 |
| Dipanor AS | Professional & scientific | 1966 |
| Dmsalg AS | Manufacturing | 2012 |
| DNG Blikk AS | Construction | 2025 |
| DNM Bygg Og Rehabilitering AS | Construction | 2026 |
| Dopp Holding AS | | 2022 |
| DR. Wang AS | Health & social care | 2020 |
| Driver Trafikkskole AS | Education | 2013 |
| Driver Vekst AS | Education | 2022 |
| DTG AS | Wholesale & retail | 2011 |
| Duplikator AS | Real estate | 2018 |
| Ecl Invest AS | | 2018 |
| Efan Holding AS | | 2019 |
| Eggan AS | Construction | 2011 |
| Ehansen Holding AS | | 2023 |
| Eiendomskilt AS | Professional & scientific | 2021 |
| Ek Entreprenør AS | Real estate | 2026 |
| El-Care Esd AS | Education | 2012 |
| Elavit Fjellhamar AS | Arts & recreation | 2024 |
| Elektrikern AS | Construction | 2020 |
| Elemental Holding AS | Professional & scientific | 2018 |
| Elisabiz AS | | 2023 |
| Elitas Bygg AS | Construction | 2026 |
| Elkat AS | Administrative & support | 2022 |
| Elkat Industry AS | Administrative & support | 2023 |
| Elkat Service AS | Administrative & support | 2023 |
| Empirio AS | Administrative & support | 2011 |
| Enda Kaldere Holding AS | | 2019 |
| Energidata Consulting AS | Professional & scientific | 2007 |
| Engeseth Begravelsesbyrå AS | Other services | 1996 |
| Enter Security AS | Administrative & support | 2015 |
| Envio AS | | 2016 |
| Epixit Invest AS | Financial services | 2017 |
| Erma Nemis AS | Real estate | 2015 |
| Escana Eiendom AS | Real estate | 2011 |
| Ess Elektro AS | Construction | 2025 |
| Euroglow AS | Wholesale & retail | 2013 |
| Evas Miljø Og Service Ans | Administrative & support | 1988 |
| Event Tech AS | Administrative & support | 2025 |
| Evjen Invest AS | | 2005 |
| F Hagen Holding AS | Wholesale & retail | 2023 |
| Fa Eiendom Da | Real estate | 2016 |
| Fama Investments AS | | 2022 |
| Familien Stadheim AS | | 2026 |
| Fang Holding AS | Health & social care | 2024 |
| Far Og Sønn Entreprenør AS | Construction | 2019 |
| Farmah AS | Health & social care | 2025 |
| Fellinghaug Studio AS | Professional & scientific | 2016 |
| Feltheim Holding AS | Real estate | 2017 |
| FH Consult AS | Professional & scientific | 2014 |
| Fiblo AS | Wholesale & retail | 2026 |
| Figenshus AS | Professional & scientific | 2018 |
| Filip & Sønn AS | Construction | 2018 |
| Filmteam Norsk Skiltservice AS | Other services | 2007 |
| Fineide AS | Financial services | 2005 |
| Finsand Consulting AS | Professional & scientific | 2020 |
| First Elektro AS | Wholesale & retail | 2016 |
| First Estate Holding AS | Financial services | 2005 |
| Fivemanage AS | Information & communication | 2024 |
| Fizza Norway AS | Hospitality | 2022 |
| Fjellhamar Apotek AS | Wholesale & retail | 2021 |
| Fjellhamar Bilpleie Senter AS | Other services | 2014 |
| Fjellhamar Bruk AS | Real estate | 2016 |
| Fjellhamar Eiendomsdrift AS | Real estate | 2021 |
| Fjellhamar Legesenter Da | Health & social care | 1995 |
| Fjellhamar Pizza AS | Hospitality | 2025 |
| Fjellhamar Sushi & Wok Da | Hospitality | 2017 |
| Fjellhamar Tannlegesenter AS | Health & social care | 2025 |