| Indahl AS | Oslo | 2018 |
| Indak AS | Helgeroa | 2024 |
| Indat Consulting AS | Oslo | 2018 |
| Indecon AS | Oslo | 2013 |
| Indelserv Nuf | Ee-88305 Pärnumaa | 2024 |
| Indelta AS | Flekkerøy | 2015 |
| Indem Advokatfirma AS | Oslo | 2015 |
| Indem AS | Oslo | 2015 |
| Independent Holding AS | Oslo | 2009 |
| Inderøy Dyreklinikk AS | Inderøy | 1998 |
| Inderøy Utvikling SA | Inderøy | 2019 |
| Inderøymat AS | Inderøy | 2019 |
| India Trading Nordic AS | Os I Østerdalen | 2016 |
| Indial AS | Oslo | 2022 |
| Indianer Management AS | Oslo | 2009 |
| Indigo Arkitekter AS | Sandvika | 2005 |
| Indigo Boligstyling AS | Kjeller | 2004 |
| Indigo Consulting Ans | Sandnes | 2008 |
| Indigo Holding AS | Skjeberg | 2014 |
| Indikel AS | Bergen | 2018 |
| Indira AS | Narvik | 2013 |
| Indira Holding AS | Narvik | 2013 |
| Indirect Pro AS | Ulsteinvik | 2026 |
| Indirekte AS | Bekkestua | 2026 |
| Indo Naturals AS | Nesodden | 2019 |
| Indpro AS | Ranheim | 2018 |
| Indre Holding AS | Larkollen | 2023 |
| Indre Mannevær AS | Mandal | 2021 |
| Indre Nordmøre Veterinærkontor AS | Surnadal | 2019 |
| Indre Sandvik AS | Oslo | 2013 |
| Indre Østfold Eiendomsmegling AS | Askim | 2020 |
| Indre Østfold Næringsutvikling AS | Askim | 2017 |
| Indre Østfold Regnskapsbyrå SA | Trøgstad | 1946 |
| Indre Østfold Takst AS | Trøgstad | 2015 |
| Indreaastunet Invest AS | Naustdal | 2024 |
| Indrebø Veterinære Tenester AS | Eikelandsosen | 1995 |
| Indrefjorden Invest AS | Haugsvær | 2014 |
| Indrelid AS | Oslo | 2026 |
| Indtec Sweden AB | Se-426 50 Gøteborg | 2015 |
| Indurad GmbH | De-52070 Aachen | 2025 |
| Indurest GmbH | 65817 Eppstein 3 | 2006 |
| Induroc AB | Se-169 04 Solna | 2023 |
| Industor AB | Se-591 96 Motala | 2023 |
| Industri Bygning Og Hjem Instrumentering AS | Bekkestua | 2013 |
| Industri Consulting AS | Ski | 2019 |
| Industri Design Offshore Management AS | Ulsteinvik | 2019 |
| Industri Engasjement AS | Rødberg | 1998 |
| Industri Partner AS | Trondheim | 1994 |
| Industri Prosjekter AS | Ålesund | 2018 |
| Industri Talent AS | Sellebakk | 2026 |
| Industrial Am AS | Mo I Rana | 2023 |
| Industrial Controls AS | Sandnes | 2007 |
| Industrial Management Services Consulting AS | Stavanger | 1999 |
| Industrial Turbine Company (UK) Limited | Frimley Surrey Gu16 8Qd | 2021 |
| Industrias Lagun Artea S.L. Nuf | 20750 Zumaia-Gipuzkoa | 2015 |
| Industridesign AS | Oslo | 2018 |
| Industrieanlagen- Betriebsgesellschaft Mit Beschränkter Haftung | De-85521 Ottobrunn | 2026 |
| Industriell Dokumentasjon AS | Kongsberg | 2017 |
| Industriell Vannbehandling AS | Stavanger | 2012 |
| Industriell Vannbehandling Holding AS | Stavanger | 2023 |
| Industrifinans Forretningsførsel AS | Oslo | 2008 |
| Industrikraft AS | Sunndalsøra | 2021 |
| Industripakking AS | Gjøvik | 2005 |
| Industripersonell Marine AS | Tromsø | 2022 |
| Industripoolen I Skellefteå AB | Se-931 35 Skellefteå | 2012 |
| Industriprofilering AS | Gamle Fredrikstad | 2025 |
| Industriprosjekt AS | Mo I Rana | 1989 |
| Industritaksering AS | Drammen | 1987 |
| Industritakst AS | Ålesund | 2020 |
| Industritechnik AS | Søgne | 2017 |
| Industritek AS | Lillesand | 2020 |
| Industriteknikk Og Laser AS | Bryne | 2020 |
| Industritjenesten AS | Tistedal | 2017 |
| Industritjenester AS | Florø | 1995 |
| Industriuka Expo AS | Stavanger | 2022 |
| Industriutvikling Vest AS | Isdalstø | 2011 |
| Industriveien 4, 3.ETG AS | Revetal | 2015 |
| Industrivisualisering AS | Storvik | 2005 |
| Induvita AS | Bodø | 2022 |
| Induvo AS | Vestnes | 2021 |
| Ine Foss Consulting AS | Lillestrøm | 2020 |
| Ine Hauger AS | Eidsvoll Verk | 2024 |
| Ine Tjugum Invest AS | Spikkestad | 2014 |
| Ineo Tinea Norway | Fr-38240 Meylan | 2022 |
| Ineos AS | Oslo | 2024 |
| Ineos Enterprises Holdings II Limited | London Chelsea Sw33Ty | 2024 |
| Inergeo AS | Drammen | 2012 |
| Inergo AS | Heimdal | 2011 |
| Inerma AS | Oslo | 2006 |
| Inermo Invest Holding AS | Haugesund | 2010 |
| Inevitable AS | Oslo | 2021 |
| Inevitable Growth AS | Ski | 2026 |
| Inews Media Group AS | Oslo | 2017 |
| Inexa AS | Hundvåg | 2005 |
| Inexo AS | Egersund | 2023 |
| Inexsa AS | Rådal | 2023 |
| Infact AS | Lysaker | 2012 |
| Infast AS | Kristiansand S | 1998 |
| Infatigoo AS | Sirevåg | 2025 |
| Inferia AS | Oslo | 2023 |