| Lyngdal Invest AS | Real estate | 2018 |
| Lyngdal Jakt Og Fiskesenter AS | Wholesale & retail | 1998 |
| Lyngdal Karosseri & Auto AS | Other services | 1968 |
| Lyngdal Marine AS | Manufacturing | 2013 |
| Lyngdal Mek Eiendom AS | Real estate | 1981 |
| Lyngdal Motorsenter Ans | Wholesale & retail | 1997 |
| Lyngdal Møbler AS | Wholesale & retail | 2015 |
| Lyngdal Næringspark AS | | 2007 |
| Lyngdal Pizza A/S | Hospitality | 2009 |
| Lyngdal Recycling AS | Real estate | 1997 |
| Lyngdal Rør AS | Construction | 2015 |
| Lyngdal Sentrum Invest AS | Real estate | 2005 |
| Lyngdal Service AS | Wholesale & retail | 2021 |
| Lyngdal Skog AS | Agriculture & fishing | 2018 |
| Lyngdal Smykker Og Klokker AS | Wholesale & retail | 2025 |
| Lyngdal Tannlegesenter AS | Health & social care | 2023 |
| Lyngdal Vask&Service AS | Other services | 2026 |
| Lyngdals Avis AS | Information & communication | 2014 |
| Lyngdølen AS | Hospitality | 2016 |
| Lyngutbyggeren AS | Real estate | 1999 |
| Lyngdal Inn A/S | Hospitality | 1988 |
| Løland Produksjon Og Engros AS | Hospitality | 2005 |
| M Birkeland Invest AS | | 2026 |
| M Janke Eiendom & Utleie AS | Construction | 2020 |
| M Janke Flis AS | Construction | 2020 |
| M.O. Transport AS | Transport & logistics | 2005 |
| Mahela AS | Real estate | 2006 |
| Maltech AS | Construction | 2006 |
| Mansar Malerservice AS | Construction | 2017 |
| Marine Global Group AS | Real estate | 2002 |
| Marko Janke Holding AS | Construction | 2020 |
| Marlih AS | Agriculture & fishing | 2020 |
| Marnar Holding AS | Real estate | 1995 |
| Max Bildeler AS | Wholesale & retail | 2025 |
| MCC AS | Wholesale & retail | 2020 |
| Media Sør Productions AS | Information & communication | 2023 |
| Meieri Gården AS | Real estate | 2006 |
| Meling Bygg AS | Professional & scientific | 2025 |
| MH Vei Og Anleggstjenester AS | Construction | 2019 |
| Minito AS | Real estate | 2018 |
| Mirkosoft AS | Wholesale & retail | 2005 |
| Modalsli Rør Lister AS | Construction | 2021 |
| Molandsli AS | Construction | 2022 |
| Mon Platin Norge AS | Wholesale & retail | 2013 |
| MS Cars AS | Wholesale & retail | 2020 |
| MS Garage AS | Real estate | 2026 |
| Mstøle AS | Real estate | 2005 |
| Mujota Drift AS | Construction | 2024 |
| Murerfirma Thomas Litland AS | Construction | 2026 |
| Murmester Arnt Kristensen AS | Construction | 1996 |
| Music Angel Europe AS | Wholesale & retail | 2011 |
| Myran AS | Real estate | 2004 |
| Møbelringen Lyngdal AS | Wholesale & retail | 2022 |
| Møst Holding AS | | 2025 |
| Møter & Mat AS | Hospitality | 2014 |
| Nais AS | Wholesale & retail | 2013 |
| Narve Rosfjord Eiendom AS | Professional & scientific | 2005 |
| Narve Rosfjord Engineering AS | Professional & scientific | 2007 |
| Narvestad AS | Real estate | 2020 |
| Narvestadgården AS | Real estate | 2006 |
| Nes Service AS | Construction | 2022 |
| Netteland Horizon AS | | 2023 |
| Nettforsk AS | Professional & scientific | 2004 |
| Neumsoft AS | Financial services | 2005 |
| Nextbyte AS | Information & communication | 1999 |
| NHC Invest AS | | 2025 |
| Nisjesjappa AS | Wholesale & retail | 2026 |
| Nordic Door AS | Manufacturing | 1993 |
| Nornebygg AS | Construction | 2021 |
| Norse Takst AS | | 2026 |
| Norsk Husservice AS | Other services | 2021 |
| Norske Villsauskinn AS | Manufacturing | 2017 |
| North Sea Shells AS | Agriculture & fishing | 2020 |
| Norvac AS | Wholesale & retail | 2007 |
| Nsight AS | Professional & scientific | 2026 |
| Nuiu - Norsk Utdanning I Utlandet AS | Education | 2018 |
| Nybyggeren AS | Professional & scientific | 2023 |
| Nybyggern AS | Construction | 2000 |
| Nye Siam Cafe AS | Hospitality | 2025 |
| Nøkland Rørleggerservice AS | Construction | 2015 |
| O Aas Holding AS | Construction | 2007 |
| O.J. Solås Holding AS | Real estate | 2006 |
| Obbk Consult AS | Professional & scientific | 2012 |
| Ocean Test Hub AS | Professional & scientific | 2016 |
| Oddvin Lande Holding AS | Real estate | 2005 |
| Offshore Automation Consult AS | Professional & scientific | 2020 |
| Ok Regnskap AS | Professional & scientific | 2024 |
| Olav B. Eiendom AS | Transport & logistics | 2005 |
| Olefla AS | Real estate | 2017 |
| Omland Bygg AS | Construction | 2007 |
| Opa! Souvlaki of Greece AS | Hospitality | 2023 |
| Orientmeny AS | Wholesale & retail | 2010 |
| Oslo Signatur AS | Wholesale & retail | 2025 |
| Osok AS | | 2013 |
| Ougland Holding AS | | 2025 |
| Ov Import AS | Wholesale & retail | 2012 |
| Oves Yamaha Senter AS | Wholesale & retail | 1990 |
| Ovimatari Investering AS | Construction | 1991 |
| Paulsens Hotell AS | Hospitality | 2010 |
| Perspektiv Stensland Stålesen Og Hansen Ans | Real estate | 1987 |