| Nali Cafe Restaurant AS | Hospitality | 2021 |
| Nam Wong Nordby Ans | Health & social care | 2001 |
| Nanna Tømte Holding AS | | 2024 |
| Nassar Herrefrisørsalong AS | Other services | 2014 |
| Navnetavle Ans | Professional & scientific | 2023 |
| Nederberg Bilutleie AS | Administrative & support | 1981 |
| Nedre Skutuset Avløpslag SA | Water & waste | 2020 |
| NHS Holding AS | Financial services | 2008 |
| Nivå Gruppen AS | Real estate | 2021 |
| Nkgarasje AS | Other services | 2026 |
| No & NE Invest AS | | 2021 |
| Noble Nest AS | Professional & scientific | 2024 |
| NORBO1 AS | Wholesale & retail | 2025 |
| Nordhjem AS | Real estate | 2024 |
| Nordic Cartech AS | Wholesale & retail | 2020 |
| Nordic Rail AS | Transport & logistics | 2011 |
| Nordic Skytech AS | Professional & scientific | 2018 |
| Nordre Elverum Skogsbilveier SA | Real estate | 1997 |
| Norge a to Z Bygg AS | Construction | 2025 |
| Norgesblomst AS | Wholesale & retail | 2021 |
| Norgeshus Elverum AS | Construction | 2012 |
| Normotion AS | Professional & scientific | 1996 |
| Norse Biotech AS | Professional & scientific | 2015 |
| Norse Green Energy AS | Professional & scientific | 2023 |
| Norse Industries AS | Manufacturing | 2014 |
| Norse Metal Elverum AS | Manufacturing | 2004 |
| Norse Products AS | Professional & scientific | 2016 |
| Norsebuild AS | Construction | 2026 |
| Norsk Helse AS | Wholesale & retail | 2015 |
| Norsk Vikinghonning AS | Agriculture & fishing | 2018 |
| Norstierne Aksjeselskap | | 2021 |
| Nortømmer AS | Wholesale & retail | 1998 |
| Norvern AS | Information & communication | 2025 |
| Norwegian Cozy AS | Manufacturing | 2013 |
| NTN AS | Construction | 2025 |
| Nu Invest AS | Real estate | 2005 |
| Nunatak Invest AS | | 2002 |
| Nye Nordre Gjedslemoteig Ans | Agriculture & fishing | 2004 |
| Nye Sporten Elverum AS | Wholesale & retail | 2020 |
| Nygaard Eiendomsutvikling Og Utleie AS | Real estate | 2019 |
| Nyseterberget Skog Ans | Agriculture & fishing | 1974 |
| Níu Life Sciences AS | Other services | 2026 |
| Nøgd AS | | 2021 |
| Nøstefruene AS | Wholesale & retail | 2022 |
| O Pedersen AS | Real estate | 1998 |
| O R Eiendom AS | Construction | 1977 |
| Oct AS | | 2026 |
| Odd Og Hege's Helsekost AS | Wholesale & retail | 2009 |
| Oddsomatic AS | Information & communication | 2004 |
| Ogt Invest AS | | 2025 |
| Oj! Gruppen AS | Real estate | 2018 |
| Oj! Konsept AS | Professional & scientific | 2018 |
| Olaf Silkebækken AS | Manufacturing | 2025 |
| Oleas Holding AS | Real estate | 2005 |
| Oliver Eiendom Elverum AS | Wholesale & retail | 1997 |
| Optiker Evensen AS | Wholesale & retail | 2022 |
| Optikk Elverum AS | Wholesale & retail | 2008 |
| Oslo Mesterbygg AS | Construction | 2024 |
| Ouroms Auto Ans | Other services | 2004 |
| Ozerozeta Holding AS | | 2025 |
| P. Nordbakken Takst AS | Real estate | 2023 |
| Pa Gruppen AS | Real estate | 2022 |
| Pathittas Mattjenester AS | Hospitality | 2021 |
| Patika Holding AS | Real estate | 2024 |
| Patricio Eduardo Jara Mahmoud Alavinasab Da | Hospitality | 2001 |
| Paulsbyen Gym Elverum AS | Education | 2019 |
| Paulsbyen Gym Rena AS | Arts & recreation | 2026 |
| Paulsbyen Holding AS | Real estate | 2017 |
| Pawel T Holding AS | Other services | 2022 |
| Pe & T Holding AS | Financial services | 2005 |
| Peb Holding AS | Real estate | 2005 |
| Peder Østmoe AS | Real estate | 1985 |
| Pedersen Maskin Og Transport AS | Transport & logistics | 1988 |
| Pedersen Virkestransport AS | Transport & logistics | 2023 |
| Pelias Norsk Skadedyrkontroll AS | Administrative & support | 2018 |
| Per Erik Østmoe AS | Hospitality | 1982 |
| Pilkington Norge AS | Manufacturing | 1973 |
| Pinkhunters AS | Professional & scientific | 2020 |
| Pio Invest AS | Real estate | 2003 |
| PKH Eiendom AS | Real estate | 2023 |
| Pkmax AS | Real estate | 2021 |
| PLAN1 AS | Professional & scientific | 2017 |
| PLAN1 Holding AS | Professional & scientific | 2017 |
| Plante Og Importkontroll AS | Professional & scientific | 2021 |
| Poortman Holding AS | | 2022 |
| Popsykkel AS | Manufacturing | 2023 |
| Portvegen Eiendom AS | Real estate | 2014 |
| PP Elverum AS | Hospitality | 2013 |
| PPD Holding AS | Real estate | 2012 |
| Presis Digitalprint AS | Manufacturing | 2016 |
| Proffservice Elverum AS | Wholesale & retail | 2007 |
| Profilglass Nor AS | Manufacturing | 2009 |
| Psykologspesialist Guro M. Skulberg AS | Health & social care | 2025 |
| Pu Tuo Shan Restaurant AS | Hospitality | 2009 |
| Punktet Elverum AS | Hospitality | 2022 |
| R Og H AS | Real estate | 2025 |
| R&T Partners AS | Professional & scientific | 2004 |
| Ragde AS | Real estate | 2006 |
| Raillog AS | Professional & scientific | 2010 |
| Ramatuelle Holding AS | | 2020 |