| MS Trade AS | Wholesale & retail | 2025 |
| Msolli Invest AS | Professional & scientific | 2018 |
| Multisolve AS | Construction | 2026 |
| Myhre AS | Construction | 2012 |
| Myhre Drift AS | Agriculture & fishing | 2019 |
| Myhrebakken Blikk AS | Construction | 2025 |
| Mythen Consulting AS | Professional & scientific | 2020 |
| Mosby Anlegg AS | Construction | 1989 |
| Møglebo Ans | Hospitality | 1997 |
| Møglestu Fus Barnehage AS | Education | 2018 |
| Møglestu Gårdsdrift Og Event AS | Real estate | 2026 |
| Møglestu Hovedgård AS | Real estate | 2018 |
| Møglestuveien AS | Real estate | 2022 |
| Nang Thai Takeaway AS | Hospitality | 2025 |
| Naturlivis Da | Wholesale & retail | 2002 |
| NDT Norge AS | Education | 2010 |
| Nedre Gausen AS | | 2022 |
| Nemesis Venture AS | | 2015 |
| Nemus Lillesand AS | Health & social care | 2013 |
| Neoverse AS | Information & communication | 2024 |
| Nestegården AS | Real estate | 2017 |
| New Style Frisør Lillesand AS | Other services | 2018 |
| Newconnection AS | Construction | 2011 |
| Newconnection Eiendom 3 AS | Real estate | 2021 |
| Newconnection Holding AS | Construction | 2011 |
| Ngconsultans AS | Information & communication | 2017 |
| Nils Cato Glamsland AS | Mining & quarrying | 2007 |
| Noket AS | Information & communication | 2007 |
| Nor Line Transport AS | Transport & logistics | 2024 |
| Nordic Chemtec AS | Wholesale & retail | 2026 |
| Nordic Floor AS | Construction | 2026 |
| Nordic Sustain AS | Wholesale & retail | 1985 |
| Nordiska Ballad Kompaniet AS | Arts & recreation | 2025 |
| Nordlys Auto AS | Other services | 2018 |
| Norsk Epoxy Sør AS | Construction | 2023 |
| Nyberg Bygg AS | Construction | 2026 |
| Nye Fargehuset AS | Wholesale & retail | 1989 |
| Nyjore AS | Real estate | 2013 |
| Oco Maritim AS | Manufacturing | 1988 |
| Olav Eigeland AS | Construction | 1991 |
| Olav Eigeland Eiendom AS | Construction | 2010 |
| Oldeide AS | Information & communication | 2025 |
| Ole Lunde AS | Real estate | 1985 |
| Ole Olsen Eiendom AS | Real estate | 2004 |
| Ole Olsen Holding AS | Real estate | 1977 |
| Ole Olsen Mat AS | Wholesale & retail | 2004 |
| Olje Og Parafin Sør AS | Wholesale & retail | 2019 |
| Olsen Assuranse AS | Real estate | 2007 |
| Omdal Betong AS | Construction | 2013 |
| Omdal Holding AS | Construction | 2022 |
| Omerta Nor AS | Real estate | 2009 |
| Opphav AS | Professional & scientific | 2026 |
| Opsahlveien 1 AS | Real estate | 2016 |
| Optimal Security AS | Education | 2007 |
| Ordklang AS | Professional & scientific | 2022 |
| Oseland AS | | 2021 |
| Osteverkstedet AS | Manufacturing | 2016 |
| Oto Eiendom AS | Construction | 2000 |
| Pagin AS | Professional & scientific | 2021 |
| Pagin Holding AS | Professional & scientific | 2005 |
| Pallemann AS | Wholesale & retail | 2010 |
| Papa Mios International AS | Manufacturing | 2003 |
| Pappbuene Produksjon Og Service AS | Administrative & support | 2019 |
| Pe-To Murerfirma AS | Construction | 2007 |
| Pidi Holding AS | Financial services | 2005 |
| Pocket Nest AS | Manufacturing | 2022 |
| Polish Renovation Ans | Construction | 2006 |
| Pont Enterprise Norge AS | Health & social care | 2015 |
| Popart Design AS | Wholesale & retail | 2025 |
| Posebyen Eiendom AS | Real estate | 2020 |
| Poseidon Subsea Consulting AS | Administrative & support | 2022 |
| Potetskiver AS | Information & communication | 2014 |
| PP Nordica Norge AS | Professional & scientific | 2017 |
| Prax Holding AS | | 2025 |
| Preben Lunde AS | Real estate | 2021 |
| Primrose AS | Information & communication | 2005 |
| Print Ut Da | Information & communication | 2024 |
| Proff Nordic AS | Wholesale & retail | 2015 |
| Profiltøy AS | Wholesale & retail | 2019 |
| Quicktech Web AS | Professional & scientific | 2018 |
| R. Svarstad AS | Construction | 2019 |
| R1 Renholdspesialisten AS | Administrative & support | 2009 |
| Racepace Simulation AS | Administrative & support | 2026 |
| Radio L Lillesand Nærradio AS | Information & communication | 1989 |
| Ratto AS | Manufacturing | 2015 |
| Ravnevand Eiendom AS | Real estate | 2024 |
| RDM Eiendom AS | Real estate | 2021 |
| Ready to Learn AS | Professional & scientific | 2022 |
| Reflex Sound System AS | Wholesale & retail | 2019 |
| Reidar Tønnessen AS | Construction | 2005 |
| Reier Eiendom AS | Construction | 2018 |
| Reise Holding AS | | 2024 |
| Rekrea AS | Real estate | 2015 |
| Restaurant Sjøbua AS | Hospitality | 1994 |
| Rgtg AS | | 2026 |
| Ribe & Dahle Eiendom AS | Real estate | 2005 |
| Ribe Eiendom AS | Real estate | 2012 |
| Ribe Eiendomsdrift AS | Administrative & support | 2023 |
| Ribe Entreprenør AS | Construction | 2023 |
| Ribe Maritime Services AS | Professional & scientific | 2025 |