| HGH Eiendom AS | Real estate | 2009 |
| Hjorten AS | Real estate | 2018 |
| Hmuf AS | | 2026 |
| HNS Grunneierlag SA | Real estate | 1994 |
| Holaker C & H AS | Professional & scientific | 1989 |
| Holen Holding AS | Real estate | 1997 |
| Hornmoen Bruk AS | Manufacturing | 1965 |
| Horvath Invest AS | Real estate | 2011 |
| Hovdmoen Terminal AS | Transport & logistics | 2008 |
| HPC Eiendom AS | Real estate | 2002 |
| Hrustad Invest AS | | 2025 |
| HST Holding AS | Real estate | 2019 |
| Hundekjører Butikken AS | Wholesale & retail | 2008 |
| Hybelgården Holding AS | Real estate | 2020 |
| Hydrofence AS | Wholesale & retail | 2024 |
| Håbergsvegen Veilag SA | Real estate | 1985 |
| Håpnes Holding AS | | 2026 |
| Håst AS | Real estate | 2013 |
| Hærligheten AS | Real estate | 2015 |
| Hørsel-Senteret AS | Health & social care | 2002 |
| Ib Rørservice AS | Construction | 2023 |
| Ibishi Invest AS | | 2026 |
| Ibn Holding AS | | 2019 |
| Ida Søby Invest AS | | 2019 |
| Idèhus Innlandet AS | Real estate | 2016 |
| Ifront Økonomi AS | Professional & scientific | 2012 |
| Ildstedet Elverum AS | Wholesale & retail | 2025 |
| Indre Vika Eiendom AS | | 2018 |
| Ingdal Graveservice AS | Construction | 2019 |
| Innlandet Alarmtjeneste AS | Construction | 2022 |
| Innlandet Bolig & Hytteservice AS | Construction | 2021 |
| Innlandet Fiber AS | Construction | 2022 |
| Innlandet Gokartsenter AS | Administrative & support | 2022 |
| Innlandet Maskin AS | Wholesale & retail | 2017 |
| Innlandet Spisesteder Og Catering AS | Hospitality | 2015 |
| Innlandet Tegning & Prosjektering AS | Professional & scientific | 2018 |
| Innlandet Vask Og Rens AS | Other services | 2023 |
| Innova Klinikken AS | Other services | 2015 |
| Innovasjonsprodusentene AS | Information & communication | 2014 |
| Investihagen AS | Real estate | 2019 |
| J-Feltet AS | Real estate | 2009 |
| Jako Sushi Elverum AS | Hospitality | 2022 |
| Jams Holding AS | | 2021 |
| Jan Roger Nystuen Holding AS | Transport & logistics | 2014 |
| Janca Eiendom AS | Real estate | 2002 |
| Janki AS | Real estate | 1987 |
| JB Eiendom & Bilutleie AS | Administrative & support | 2019 |
| Jge Invest AS | Real estate | 2020 |
| JJ Anlegg AS | Construction | 2026 |
| JMT Holding AS | Real estate | 2005 |
| Johansen Skogsdrift AS | Agriculture & fishing | 1992 |
| John Birger Sæthre AS | Financial services | 2005 |
| Joker Trykk & Reklame AS | Manufacturing | 2018 |
| Jon Sunds Veg 12 AS | Real estate | 2024 |
| Jon Sundsvei 1 AS | Real estate | 2009 |
| Josveen Holding AS | | 2021 |
| Jovial Hund Da | Other services | 2020 |
| JP Matservering AS | Hospitality | 2026 |
| Jurist Schioldborg AS | Professional & scientific | 2024 |
| Jømna Eiendom AS | Real estate | 2021 |
| K. Olsen AS | Wholesale & retail | 2007 |
| K4B Holding AS | | 2020 |
| Kafe Øst AS | Hospitality | 2020 |
| Kakadue Cafe Og Spiseri | Hospitality | 2024 |
| Karma Fitness AS | Arts & recreation | 2009 |
| Katid AS | | 2023 |
| Kavco Holding AS | Hospitality | 2013 |
| KCR Elverum AS | Hospitality | 2014 |
| KCR Holding AS | Real estate | 2015 |
| Kha-Holding AS | Financial services | 2017 |
| Kilen Skog Da | Agriculture & fishing | 2011 |
| King Fish Da | Wholesale & retail | 2015 |
| Kirkebergsvegen SA | Real estate | 2025 |
| Kiropraktorhuset Elverum AS | Health & social care | 2023 |
| Kiønig Eiendom AS | Real estate | 2025 |
| Kiønig Gruppen AS | Real estate | 2024 |
| Kjelland Holding AS | Health & social care | 2005 |
| Kjellands Tannlegepraksis AS | Health & social care | 1998 |
| Kjerneth Holding AS | | 2026 |
| Kjetil Berg AS | Construction | 2019 |
| Kjøkkensenteret Elverum AS | Wholesale & retail | 1996 |
| KK Byggservice AS | Construction | 2018 |
| Kkul Holding AS | Real estate | 2019 |
| Klinikk Anemone AS | Health & social care | 2024 |
| Knippa Holding AS | | 2021 |
| Knut Andersen Holding AS | Financial services | 2005 |
| Knut Magnor AS | Agriculture & fishing | 2008 |
| Ko Myhre Invest AS | | 2026 |
| Kob Eiendom AS | Real estate | 2013 |
| Koieklinikken AS | Health & social care | 2025 |
| Kokkvoll Invest AS | | 2023 |
| Kolgrov Holding AS | | 2025 |
| Kolob AS | | 2022 |
| Kolstad Gravemaskindrift AS | Construction | 2012 |
| KR Røhne Holding AS | | 2026 |
| Kreativ Kafé AS | | 2026 |
| Kremmern Produksjon AS | Hospitality | 1999 |
| Kremmertorgets Urforretning Ans | Wholesale & retail | 1985 |
| Krona/Stavåsen Skogsbilveier SA | Real estate | 1994 |
| Ktech Holding AS | Financial services | 2010 |