| Hove Kultur & Event AS | Administrative & support | 2007 |
| Husubæk AS | | 2024 |
| HV Design & Construction AS | Professional & scientific | 2017 |
| Hywood AS | Manufacturing | 2024 |
| Iauto AS | Wholesale & retail | 2017 |
| Idefix Invest AS | | 2023 |
| Idestart AS | Information & communication | 2023 |
| Intekto AS | Professional & scientific | 2025 |
| Jara Montasje AS | Construction | 2023 |
| John Bruktbil AS | Wholesale & retail | 2021 |
| Jostein Emmerhoff AS | Information & communication | 2025 |
| Jubilama AS | | 2021 |
| Juridex AS | Information & communication | 2022 |
| Juviel Holding AS | Construction | 2014 |
| Juwi AS | Health & social care | 2024 |
| Jødahl Entreprenør AS | Construction | 1994 |
| Jødahl Maskin AS | Construction | 2014 |
| K. Garshol Rock Engineering AS | Professional & scientific | 2024 |
| Kascar Eiendom AS | Real estate | 2025 |
| Kascar Holding AS | Real estate | 2025 |
| Kenneth Leret Service AS | Professional & scientific | 2011 |
| Kjell Roger Bakker Holding AS | | 2019 |
| Knuteknuten AS | Wholesale & retail | 2010 |
| Ks-Maskin AS | Construction | 2022 |
| Kubectl AS | Information & communication | 2022 |
| Kubusi AS | Financial services | 2005 |
| Kuskerudvegen 1 AS | Real estate | 2018 |
| Kuskerudvegen 4 Bolig AS | Real estate | 2016 |
| Kuskerudvegen 4 Næring AS | Real estate | 2016 |
| Kuskerudvegen 7 AS | Real estate | 2016 |
| L.E.R Invest AS | | 2024 |
| Larawell AS | Information & communication | 2022 |
| Lemo Norway AS | Energy | 2000 |
| Ligaard Engineering AS | Professional & scientific | 2015 |
| Lille Himmel AS | Other services | 2021 |
| Lille Stjerne Dagmamma AS | Health & social care | 2021 |
| Lille Wembley Ans | Hospitality | 1998 |
| Lillestrøm Byggservice AS | Construction | 2020 |
| Lillestrøm Drift AS | Construction | 2021 |
| Lillestrøm El-Installasjon AS | Construction | 2025 |
| Lillestrøm Elektro AS | Construction | 2009 |
| Linjegården Næring AS | Real estate | 2018 |
| Linus Utleie AS | Administrative & support | 1993 |
| Longhill Software AS | Information & communication | 2012 |
| M.W Holding AS | | 2024 |
| Maiken Holberg AS | Wholesale & retail | 2017 |
| Makeriet HGS AS | Manufacturing | 2007 |
| Maler Martin Proff AS | Construction | 2024 |
| Malerfirma Rune Stople AS | Construction | 2015 |
| Mammas Nyt Og Flyt AS | Hospitality | 2026 |
| Maple Glen AS | Real estate | 2023 |
| Marjan AS | Professional & scientific | 2024 |
| MB Regnskap AS | Professional & scientific | 2024 |
| Mbe Eiendom AS | Real estate | 2016 |
| Meribel AS | Wholesale & retail | 2023 |
| MGR Stanislav Mikolas | Construction | 2004 |
| Mixgrill Sørumsand AS | Hospitality | 2025 |
| Moland Park Arendal Seksjon 10 AS | Real estate | 2021 |
| Moland Park Arendal Seksjon 7 AS | Real estate | 2021 |
| Moland Park Arendal Seksjon 8 Og 9 AS | Real estate | 2021 |
| MT Norbygg AS | Construction | 2013 |
| MTV Montasje AS | Construction | 2025 |
| Multifly AS | Wholesale & retail | 2010 |
| Myråker Holding AS | | 2025 |
| Målretta Galskap AS | | 2025 |
| Nansera Wellness AS | Education | 2023 |
| Nebbenes Bolig AS | Real estate | 2018 |
| Nebbenes Bygg AS | Wholesale & retail | 2012 |
| Nebbenes Eiendom AS | Real estate | 2021 |
| Nebbenes Prosjekt AS | Real estate | 2013 |
| Nebbenes Utbygging AS | Real estate | 2021 |
| Nebbenes Utvikling AS | Real estate | 2009 |
| Nebi Invest AS | | 2023 |
| Neo Systems AS | Information & communication | 2026 |
| Ninas Event AS | Arts & recreation | 2022 |
| Nittentjue Eiendom AS | Real estate | 2022 |
| No Plast Sveis AS | Manufacturing | 2024 |
| Noractor AS | Construction | 1979 |
| Noractorgården AS | Real estate | 2024 |
| Nordfonn Eiendom AS | Real estate | 2019 |
| Nordfonn Holding AS | Real estate | 2005 |
| Nordfonn Optikk AS | Wholesale & retail | 2000 |
| Nordic Stein Maskin AS | Construction | 2016 |
| Noreng Horisont AS | | 2020 |
| Norsk Butikk Sikkerhet, Søndrål Og Søndrål Ans | Wholesale & retail | 1996 |
| Norsk Butikksikkerhet AS | Wholesale & retail | 2006 |
| Norsk Rørkompani AS | Construction | 2016 |
| Nova Helse Sørumsand AS | Health & social care | 2025 |
| Nuno Cafe & Grill AS | Hospitality | 2023 |
| Oala Invest AS | Wholesale & retail | 2016 |
| Odegard Holding AS | | 2019 |
| P.N Holding AS | Construction | 2020 |
| PDC Holdings AS | | 2026 |
| Pepys Invest AS | | 2022 |
| Percen Transport AS | Transport & logistics | 2017 |
| Peter Bartak | Construction | 2004 |
| Portspesialisten AS | Wholesale & retail | 2020 |
| Pro Ventilasjon Norge AS | Construction | 2021 |
| Prosa AS | Wholesale & retail | 2024 |
| Prosa Holding AS | | 2025 |