| Danskerud Antenneservice AS | Information & communication | 2011 |
| Dartbutikk.No AS | Wholesale & retail | 2017 |
| Datagram AS | | 2023 |
| Deep River AS | Professional & scientific | 2008 |
| Deep Tech AS | Information & communication | 2021 |
| Delight Coffee House AS | Hospitality | 2018 |
| Den Grønne Mølle AS - Solceller Til Taket, Vindmøller Og Andre Grønne Energi Løsninger. | Wholesale & retail | 2023 |
| Den Norske Forskningskanalen AS | Information & communication | 2011 |
| Din Lekeplasskontrollør AS | Professional & scientific | 2024 |
| Disruptive Holding AS | | 2019 |
| Doc Eiendom AS | Real estate | 2015 |
| Dråpen VVS AS | Construction | 2007 |
| Drøbak Delikatesse AS | Wholesale & retail | 2023 |
| Drøbakveien Jord & Gjenvinning AS | Manufacturing | 2020 |
| Dyrebar Omsorg AS | Education | 2010 |
| Dyster Slakteri AS | Manufacturing | 2020 |
| Dysterjordet Andelslandbruk SA | Agriculture & fishing | 2014 |
| Dysterlia Barnehage SA | Education | 1995 |
| Dørum Eiendom Og Anlegg AS | Construction | 2024 |
| Easypku AS | Information & communication | 2022 |
| Ebbarps Bygg | Construction | 1998 |
| Ecompx AS | | 2024 |
| Eduplanet AS | Administrative & support | 2019 |
| Eeas Group AS | Wholesale & retail | 2025 |
| Ehcco AS | | 2019 |
| Eivi AS | Professional & scientific | 2019 |
| Ekeberg Sikkerhet Og Automasjon AS | Wholesale & retail | 2012 |
| Ekornhale AS | Real estate | 2020 |
| Ekornveien Garasjelag SA | Transport & logistics | 2024 |
| Eksponenten AS | Real estate | 1986 |
| Ekte Habitat AS | | 2026 |
| Elno AS | Health & social care | 2024 |
| Empathitude Pictures AS | Information & communication | 2025 |
| Energiinnovasjon AS | Professional & scientific | 2010 |
| Enjo Norge AS | Wholesale & retail | 1992 |
| Enkelt & Greit Da | Administrative & support | 2023 |
| Eot AS | Information & communication | 2023 |
| Erhus AS | Real estate | 2009 |
| Erik Holding AS | | 2018 |
| Erik Johansen AS | Wholesale & retail | 1980 |
| Face Invest AS | | 2026 |
| Falsen Da | Arts & recreation | 2013 |
| Faunveien 7 Eiendom AS | Real estate | 2013 |
| Fenja AS | | 2023 |
| Fernando Invest AS | | 2024 |
| Filmassist AS | Information & communication | 2009 |
| Finn Løken AS | Wholesale & retail | 1984 |
| Fino AS | | 2026 |
| Finvold Holding AS | Professional & scientific | 2014 |
| Finvold Management AS | Real estate | 2012 |
| Finvold Prosjekt Consult AS | Professional & scientific | 1986 |
| Fixi AS | Real estate | 2019 |
| Flenstad Trepleie Og Eiendom AS | Administrative & support | 2026 |
| Fmsss AS | Wholesale & retail | 2022 |
| Fnutt Erlik 1 AS | | 2024 |
| Fokt AS | Information & communication | 2015 |
| Follcon AS | Professional & scientific | 2008 |
| Follo Bardrift AS | Hospitality | 2020 |
| Follo Bioenergi AS | Energy | 2016 |
| Follo El-Installasjon AS | Construction | 2011 |
| Follo Elektriske AS | Construction | 1993 |
| Follo Entreprenør AS | Construction | 2026 |
| Follo Futura AS | Health & social care | 2017 |
| Follo Hagetjenester AS | Administrative & support | 2025 |
| Follo Omsorgsservice AS | Health & social care | 2005 |
| Follo Regnskap SA | Professional & scientific | 1952 |
| Follo Takstkontor AS | Real estate | 2025 |
| Follopsykologene AS | Health & social care | 2024 |
| Fram Byrå AS | Information & communication | 2026 |
| Fremsyn AS | Professional & scientific | 2019 |
| Frifot AS | | 2025 |
| Frontline Follo AS | Real estate | 2018 |
| FS Entreprenør AS | Construction | 2025 |
| Fuglem Holding AS | Financial services | 2014 |
| Fuglen Invest AS | | 2025 |
| Full Circle Holding AS | | 2026 |
| Futuragruppen AS | Real estate | 2017 |
| Follo Lås og Glass-Sikring A/S | Wholesale & retail | 1987 |
| Gaca AS | | 2019 |
| Galleriet Frisør AS | Other services | 2018 |
| Gate's Burger & Pizza AS | Hospitality | 2024 |
| Gauss AS | Information & communication | 2020 |
| GBH AS | Wholesale & retail | 2007 |
| Gerda AS | | 2021 |
| Geronimo Invest AS | Administrative & support | 2020 |
| Get-Saltveit AS | | 2021 |
| Ghas Invest AS | Construction | 2016 |
| Giermach Invest AS | Real estate | 2012 |
| Gjermund Risnes Holding AS | | 2024 |
| Gjertrud Holding AS | Health & social care | 2020 |
| Glasir Holding AS | Manufacturing | 2025 |
| Glasir Solutions AS | Manufacturing | 2025 |
| Glesti Prosjekt AS | Real estate | 2021 |
| GMR Transport AS | Transport & logistics | 2023 |
| GN Studio AS | Professional & scientific | 2017 |
| Godvik Finans AS | Professional & scientific | 2018 |
| Goodmindset AS | Health & social care | 2014 |
| GPM AS | Information & communication | 2015 |
| Granås Sykehjem AS | Real estate | 2003 |
| Green Betong AS | Construction | 2022 |