| Inghild Nygård AS | | 2022 |
| Ingho AS | | 2021 |
| Ingier AS | Wholesale & retail | 2005 |
| Inglorion AS | | 2026 |
| Ingo Utvikling AS | Real estate | 2017 |
| Ingolf Ruuds Vei 8 AS | Real estate | 2006 |
| Ingolf Wesenberg & Co AS | Wholesale & retail | 1980 |
| Ingomusic Da | Information & communication | 2021 |
| Ingram Micro AS | Wholesale & retail | 1991 |
| Ingrid Bergtun AS | Professional & scientific | 2021 |
| Ingrid Beyer AS | | 2021 |
| Ingrid Dyb AS | Professional & scientific | 2025 |
| Ingrid Hegnar Interiør Og Design AS | Professional & scientific | 2012 |
| Ingrid Næss Holding AS | Financial services | 2014 |
| Ingrid Sehm AS | Wholesale & retail | 2011 |
| Ingrid Simensen AS | Professional & scientific | 2025 |
| Ingridviklysne AS | Arts & recreation | 2022 |
| Ingriga Holding AS | Professional & scientific | 2019 |
| Ingrus AS | Financial services | 2011 |
| Ingsikt AS | Information & communication | 2024 |
| Ingulstad Holding AS | Information & communication | 2017 |
| Ingunn Design AS | Professional & scientific | 2025 |
| Ingunn Tandberg AS | | 2023 |
| Ingunn Vatnøy AS | Health & social care | 2017 |
| Ingus AS | Real estate | 1996 |
| Ingvald Ystgaardsvei Næringsbygg AS | Real estate | 2016 |
| Ingvaldsen Dagligvare AS | Wholesale & retail | 2026 |
| Ingvaldsen Invest AS | | 2020 |
| Ingvar Røang AS | Real estate | 2017 |
| Ingvild Holding AS | Financial services | 2005 |
| Ingvildsbarnehage Bestumveien AS | Education | 2023 |
| Ingvildsbarnehage Holgerslystveien AS | Education | 2023 |
| Ingwal Holding AS | | 2021 |
| Ingwill AS | Financial services | 2006 |
| Ingy AS | Professional & scientific | 2016 |
| Ingård AS | | 2019 |
| Ini Consulting AS | Information & communication | 2017 |
| Inicio AS | Health & social care | 2023 |
| Inicium AS | Professional & scientific | 1937 |
| Init AS | Professional & scientific | 1985 |
| Initech Consulting AS | Professional & scientific | 2000 |
| Initia AS | Education | 2005 |
| Initia Drift AS | Wholesale & retail | 2020 |
| Initia Eiendom AS | | 2021 |
| Initia Holding AS | | 2024 |
| Initial Invest AS | | 2018 |
| Initio Ans | Information & communication | 2000 |
| Initium Invest AS | Professional & scientific | 2007 |
| Inity Medical AS | | 2023 |
| Iniva Academy AS | Education | 2026 |
| Iniva Gruppen AS | Information & communication | 2023 |
| Iniva Holding AS | Information & communication | 2023 |
| Inivo AS | Information & communication | 2025 |
| Inizi AS | | 2018 |
| Inje AS | | 2024 |
| Injected Reality AS | Information & communication | 2017 |
| Injeksjonsteknikk AS | Construction | 1990 |
| Injela Invest AS | | 2025 |
| Injera AS | Hospitality | 2023 |
| Ink Media House AS | Professional & scientific | 2025 |
| Ink Story AS | Other services | 2024 |
| Ink the World AS | Other services | 2018 |
| Ink&Art Holding AS | Real estate | 2021 |
| Inka Chef AS | Hospitality | 2021 |
| Inka Eiendom AS | Real estate | 1995 |
| Inka Entreprenør AS | Construction | 2000 |
| Inka Hundesenter AS | Other services | 2021 |
| Inka Management AS | Information & communication | 2002 |
| Inka Utvikling AS | Real estate | 2005 |
| Inkasa AS | Real estate | 2022 |
| Inkassoregisteret AS | Administrative & support | 2021 |
| Inkerman AS | Professional & scientific | 2015 |
| Inklud AS | Information & communication | 2017 |
| Inkluderingsagentene SA | Education | 2024 |
| Inkludmi AS | Health & social care | 2025 |
| Inko Team AS | Construction | 2014 |
| Inkognito AS | Professional & scientific | 1987 |
| Inkognito Eiendom II AS | Real estate | 2012 |
| Inkognito Eiendomsmegling AS | Real estate | 2025 |
| Inkognito Holding AS | Financial services | 2014 |
| Inkognito Invest AS | | 2024 |
| Inkognito Konserveringsatelier AS | Arts & recreation | 2024 |
| Inkognito Terrasse Forum Da | Information & communication | 1994 |
| Inkognito Utvikling AS | | 2019 |
| Inkognitogata 12 AS | Real estate | 2017 |
| Inkognitogate 22 AS | Households | 1927 |
| Inkognitogaten 16 AS | Professional & scientific | 2011 |
| Inkognitogaten 33 AS | Real estate | 2020 |
| Inkognitogaten 33 Holding AS | Real estate | 2021 |
| Inkry AS | Wholesale & retail | 2015 |
| Inkubator Sundland AS | Professional & scientific | 2001 |
| Inkv - Holding AS | Real estate | 2006 |
| Inlab AS | | 2007 |
| Inlancer AS | Information & communication | 2020 |
| Inlata AS | Administrative & support | 2020 |
| Inlearn Norway AS | Education | 2020 |
| Inline Code AS | Information & communication | 2020 |
| Inline Design Limited | Construction | 2009 |
| Inline Prosess AS | Wholesale & retail | 2019 |
| Inline Software Ans | Information & communication | 2006 |