| Clear Skin Klinikken AS | Other services | 2015 |
| Clem Omsorg AS | Health & social care | 2020 |
| Cloudxtract AS | Information & communication | 2016 |
| CNC Kjeller'N AS | Manufacturing | 2026 |
| Collocatio Holding AS | Professional & scientific | 2014 |
| Connect App AS | Information & communication | 2022 |
| Conservo Miljø Da | Wholesale & retail | 2010 |
| Containergruppen Norge AS | Wholesale & retail | 2012 |
| Containergruppen Utleie AS | Administrative & support | 2020 |
| Contrast Invest AS | | 2025 |
| Copro Live AS | Information & communication | 2023 |
| CSG Invest AS | Financial services | 2015 |
| Cubio AS | Information & communication | 2020 |
| Custom Music SA | Arts & recreation | 2025 |
| Cygnio AS | Professional & scientific | 2020 |
| Cyrigo AS | Information & communication | 2026 |
| D & D Prosjekt AS | Construction | 2022 |
| Daffy Holding AS | Construction | 2002 |
| Dag Lunder AS | Health & social care | 2005 |
| Dagfinn Olsen AS | Construction | 2024 |
| Damsletta 29 AS | Real estate | 2026 |
| Damstedet Boligutvikling AS | Real estate | 1975 |
| Dan Wiik Holding AS | | 2024 |
| Dang Eiendom AS | Real estate | 2019 |
| Dang Holding AS | Real estate | 2017 |
| Daniel Marketing AS | Financial services | 2005 |
| Dekk Og Felg AS | Wholesale & retail | 1993 |
| Delight Tandoori AS | Hospitality | 2023 |
| Den Gamle Nabo AS | Hospitality | 2015 |
| Dermatek AS | Wholesale & retail | 2022 |
| Design by Sense AS | Professional & scientific | 2017 |
| Det Lille Stasjonsgalleriet Da | Wholesale & retail | 2021 |
| Detalo AS | Administrative & support | 2021 |
| Diamond Eiendom AS | Real estate | 2023 |
| Didriksons Norge AS | Wholesale & retail | 2007 |
| Digitalt Nærvær AS | Professional & scientific | 2025 |
| Din Markedsføring AS | Professional & scientific | 2025 |
| Dinos Da | Wholesale & retail | 2002 |
| Diri AS | Information & communication | 2020 |
| Disenstrandvegen 2 Hamar AS | Real estate | 2024 |
| Ditt Regnskap AS | Professional & scientific | 1989 |
| Diwitech AS | Professional & scientific | 2025 |
| DL Invest AS | Financial services | 2005 |
| Dm-Prosjekt AS | Professional & scientific | 2026 |
| Dokflyt AS | Information & communication | 2015 |
| Dolphitech 2.0 AS | Professional & scientific | 2021 |
| Dompappen AS | Financial services | 2005 |
| Double X AS | Wholesale & retail | 2021 |
| DP Innlandet AS | Hospitality | 2022 |
| Drury Lane AS | Professional & scientific | 2022 |
| Drømme-Gården AS | Wholesale & retail | 2020 |
| DSJ Invest AS | | 2022 |
| Dum Vivimus Vivamus AS | Professional & scientific | 2004 |
| Durin Eiendom AS | Real estate | 2018 |
| Dynamisk Trening AS | Arts & recreation | 2010 |
| Dyrebutikken Gjøvik AS | Wholesale & retail | 1999 |
| E. Fagerheim Invest AS | | 2026 |
| E.B. Holding AS | Real estate | 2005 |
| E.Bra Holding AS | | 2021 |
| Eager Holding AS | Professional & scientific | 2024 |
| Eager Innlandet AS | Professional & scientific | 2021 |
| Eager Revisjon AS | Professional & scientific | 2024 |
| Eagle Trading AS | Wholesale & retail | 2020 |
| Eb Holding AS | Information & communication | 2019 |
| Econ Alliansen AS | Professional & scientific | 2025 |
| Ecura Bo Og Habilitering AS | Health & social care | 2007 |
| Edfast AS | Professional & scientific | 2026 |
| Edge Eiendom AS | Real estate | 2019 |
| Edge Utvikling AS | Real estate | 2020 |
| Edrax AS | Professional & scientific | 2026 |
| Egilstuva Elektriske AS | Construction | 2025 |
| Eidsiva Bioenergi AS | Energy | 1998 |
| Eidsiva Transport Og Flyttebyrå AS | Transport & logistics | 2009 |
| Eiendom Biri AS | Real estate | 2015 |
| Eiendomsdrift Innlandet AS | Real estate | 2021 |
| Einar Sagstuen Holding AS | Financial services | 2005 |
| Einastrand AS | | 2015 |
| Eito Invest AS | | 2022 |
| El Capital AS | Real estate | 2021 |
| El Paraiso AS | Real estate | 2012 |
| Elektrogården AS | Real estate | 2003 |
| Elisabeth Finocchiaro AS | Administrative & support | 2017 |
| Elkjøp Gjøvik AS | Wholesale & retail | 2024 |
| Elling & Bjørn Petter Salgstjenester Da | Energy | 2000 |
| Elporten AS | Information & communication | 2020 |
| Eltera Gjøvik AS | Construction | 2015 |
| Elton Invest AS | Administrative & support | 2014 |
| Elverum Restaurantdrift AS | Hospitality | 2015 |
| Elvesletta Eiendom 1 AS | Real estate | 2011 |
| Elvsveen Handel Og Service AS | Wholesale & retail | 2023 |
| Emera Rekruttering AS | Administrative & support | 2025 |
| Emht Invest AS | Financial services | 1991 |
| Empet Gjøvik Dyresykehus AS | Professional & scientific | 2005 |
| Engelandsvegn 17 AS | Real estate | 2025 |
| Engers Lefsebakeri AS | Manufacturing | 1986 |
| Engsat AS | Wholesale & retail | 2017 |
| Engstrøm Holding AS | | 2019 |
| Enm Invest AS | Transport & logistics | 2005 |
| Ensrud Holding AS | | 2022 |
| Enstian AS | | 2021 |