| Follo Maleren AS | Construction | 2023 |
| Follo Tømrerbedrift Ans | Construction | 2007 |
| Follobuss AS | Transport & logistics | 2025 |
| Follotrykk AS | Manufacturing | 1991 |
| Forlagssentralen AS | Transport & logistics | 2022 |
| Fossby AS | Real estate | 2021 |
| Fredrik Beck Eliassen AS | | 2023 |
| Fredrik Mørk Holding AS | | 2019 |
| Freja Transport & Logistics AS | Transport & logistics | 1974 |
| Freja Transport Holding AS | Transport & logistics | 1995 |
| Fresh Cut AS | Wholesale & retail | 2012 |
| Friheim Akademiet AS | Education | 2024 |
| Frono AS | Administrative & support | 2017 |
| Frukt- Og Grønnsakgrossistenes Servicekontor SA | Other services | 1995 |
| Frukthaven AS | Wholesale & retail | 2006 |
| FTR Eiendom AS | Real estate | 2020 |
| FTR Invest AS | Professional & scientific | 2017 |
| Functional Health AS | Arts & recreation | 2022 |
| Genova Group AS | Information & communication | 2025 |
| Gex Capital AS | Real estate | 2015 |
| GG Kapital AS | | 2025 |
| GGV Eiendom AS | Real estate | 2020 |
| Gianni AS | Hospitality | 2020 |
| Giving & Dining AS | Wholesale & retail | 2005 |
| Gjøstøl Eiendom AS | Real estate | 2004 |
| GL Byggservice AS | Construction | 2021 |
| Gladmann Holding AS | | 2023 |
| GML Invest AS | Financial services | 2011 |
| Goat Supplements AS | Wholesale & retail | 2024 |
| God I Norsk AS | Education | 2016 |
| Gpa Flowsystem AS | Wholesale & retail | 1985 |
| Graham Consulting AS | Professional & scientific | 2002 |
| Green Gold Holding AS | | 2026 |
| Green Solar AS | Construction | 2022 |
| Grenland Næringsutleie AS | Real estate | 2024 |
| Gryteløkka AS | Real estate | 2006 |
| Gsem Hal Holding AS | | 2023 |
| Gullvekten AS | Wholesale & retail | 2015 |
| H With Invest AS | Professional & scientific | 2019 |
| Hachm Familie AS | Wholesale & retail | 2019 |
| Hammond Holding AS | | 2024 |
| Hamra Holding AS | | 2023 |
| Hanne Beck AS | Real estate | 2007 |
| Haug Tømrerservice AS | Construction | 2013 |
| Haugen & Eide Grafisk Design Ans | | 1991 |
| Haugen Maskin AS | Manufacturing | 1987 |
| Heff Bygg AS | Construction | 2019 |
| Heimkunnskap AS | Education | 2016 |
| Helianthus AS | Education | 2020 |
| Helselys AS | Other services | 2020 |
| Helt Inkludert AS | Professional & scientific | 2019 |
| Hemima Holding AS | | 2024 |
| Hensof Holding AS | | 2021 |
| Hentec Norge AS | Professional & scientific | 2016 |
| Hest I Fokus AS | Wholesale & retail | 2009 |
| Hilda Langhus Vei 2 AS | Real estate | 2022 |
| Hjertebarnet Marit AS | Arts & recreation | 2019 |
| Hjerteforhelsa AS | Other services | 2026 |
| HMS Og Byggkontroll AS | Construction | 2014 |
| Holger Fischer Spedisjon AS | Transport & logistics | 1993 |
| Holger Hartmann AS | Wholesale & retail | 1993 |
| Holmen Holding & Invest AS | Professional & scientific | 2015 |
| Hossa Invest AS | | 2021 |
| Hotterstad Holding AS | | 2024 |
| Hound Dog AS | | 2023 |
| HOUSE-9 Group AS | Real estate | 2018 |
| Humlerekka Eierseksjonssameie | Households | 2012 |
| Hurakan Holding AS | Professional & scientific | 2023 |
| Hydac AS | Wholesale & retail | 2001 |
| Håndverksveien 2 S11 AS | Real estate | 2021 |
| Håndverksveien 2 S3 AS | Real estate | 2026 |
| Håtes Byggservice Ans | Construction | 1998 |
| I Bevegelse Da | Education | 2017 |
| I&O Beck AS | Real estate | 2011 |
| Icing Invest AS | Construction | 2022 |
| Iderik AS | Real estate | 2014 |
| Im Engros AS | Transport & logistics | 2024 |
| Imtech AS | Information & communication | 1999 |
| In Vest AS | Real estate | 2019 |
| Industrifiber AS | Wholesale & retail | 2018 |
| Industrigata 17 AS | Real estate | 1974 |
| Infinity Holding AS | Financial services | 2017 |
| Ino Eiendom AS | Real estate | 2013 |
| Inoventio Consulting AS | Professional & scientific | 2020 |
| Inoventio Engineering AS | Professional & scientific | 2021 |
| Inoventio Geoteknikk AS | Construction | 2017 |
| Insanity Detailing AS | Other services | 2022 |
| Instant Service AS | Construction | 2020 |
| Intakt Eiendom AS | Real estate | 1997 |
| Interfrukt Eiendom AS | Wholesale & retail | 2012 |
| Interfrukt SA | Wholesale & retail | 1986 |
| Interkolonial SA | Wholesale & retail | 2006 |
| Investe AS | Real estate | 2010 |
| Ipacky AS | Information & communication | 2026 |
| Ipd Norway AS | Professional & scientific | 2005 |
| Ips Nordic AS | Information & communication | 2015 |
| Ips Partner AS | Manufacturing | 2015 |
| Ips Rangering AS | Administrative & support | 2013 |
| Ips Service AS | Manufacturing | 2015 |
| Iven AS | Financial services | 2008 |