| Inc AS | Tananger | 2009 |
| Incharge AB | Se-169 92 Stockholm | 2020 |
| Inclima AS | Fornebu | 2017 |
| Inclino AS | Jar | 2001 |
| Incloud AS | Rakkestad | 2017 |
| Inco AS | Kristiansand S | 1991 |
| Inco Invest AS | Vingrom | 2013 |
| Incolise AS | Alta | 2021 |
| Incom AB | Se-41755 Gøteborg | 2021 |
| Incom AS | Løten | 2015 |
| Incras Brands AS | Ranheim | 2023 |
| Incwear AS | Sola | 2015 |
| Indental AS | Oslo | 2008 |
| Independent Fashion Group AS | Oslo | 2009 |
| Indepsale Technology Limited Nuf | T23 At2P Cork | 2025 |
| Indergård Bilverksted AS | Lensvik | 2023 |
| Inderøy Forbruksforening SA | Inderøy | 1870 |
| Inderøy Kunsttun AS | Inderøy | 2026 |
| Inderøy Landhandleri AS | Inderøy | 2013 |
| Index Nordic AB Nuf | Se-16308 Spånga | 2009 |
| Indezi AS | Son | 2020 |
| Indian Trail Da | Oslo | 1995 |
| Indidye Europe AS | Kragerø | 2018 |
| Indidye Holding AS | Kragerø | 2020 |
| Indie Distribution AS | Oslo | 2005 |
| Indigo Indigo AS | Forsand | 2025 |
| Indii Creation AS | Oslo | 2020 |
| Indiska 1901 AS | Oslo | 2004 |
| Inditex Norge AS | Oslo | 1999 |
| Indivior Europe Limited Nuf | D02Dk44, Dublin 2 | 2019 |
| Indra Sistemas Nuf | Es-28108 Alcobendas Madrid | 2001 |
| Indre Oppedal Jaktlag SA | Brekke | 2024 |
| Indre Salten Data AS | Fauske | 2020 |
| Indre Østfold Maskinsenter AS | Mysen | 2008 |
| Indrebø Dekk Og Bil AS | Vestnes | 2016 |
| Indresognbil AS | Øvre Årdal | 1998 |
| Indusia Design AS | Hagan | 2023 |
| Industex SL | Es-08022 Barcelona | 1998 |
| Industri & Anlegg AS | Harstad | 1985 |
| Industri Og Boligvarme AS | Lillesand | 2019 |
| Industri Og Kompressor Tjenester AS | Drammen | 2000 |
| Industri Rek AS | Vardø | 1994 |
| Industri Supply Ltd Nuf | Bardu | 2009 |
| Industri Trading AS | Ytre Arna | 2025 |
| Industri Verktøy AS | Nesttun | 2015 |
| Industri-Hydraulikk AS | Fredrikstad | 2016 |
| Industrial Chemicals AS | Kristiansand S | 2007 |
| Industrial Services Norway AS | Stavanger | 2018 |
| Industrial Solutions AS | Skui | 2019 |
| INDUSTRIAL TEXTILES NORGE norsk avdeling av utenlandsk foretak | 3450 Allerød | 1995 |
| Industribatteri AS | Tiller | 2025 |
| Industribehov AS | Oslo | 1994 |
| Industridata AS | Florø | 1996 |
| Industriell Måleteknikk AS | Lørenskog | 1997 |
| Industries S.P.A. | It-Milano Cap 20144 | 2021 |
| Industrifabrikken AS | Algarheim | 2018 |
| Industrifiber AS | Langhus | 2018 |
| Industriforedling AS | Snarøya | 1990 |
| Industrigjenbruk AS | Hvalstad | 2023 |
| Industrigulv AS | Bodø | 2024 |
| Industrikompetanse Da | Skien | 2002 |
| Industrimotor AS | Mjøndalen | 1992 |
| Industrimøbler AS | Oslo | 2011 |
| Industrioutlet AS | Lierstranda | 2000 |
| Industripartner AS | Roa | 2025 |
| Industripartner Sprett.Net AS | Vadsø | 2014 |
| Industriporter AS | Jessheim | 1992 |
| Industriportspesialisten AS | Lørenskog | 2001 |
| Industrisalg AS | Sandnes | 1953 |
| Industrisenteret AS | Os | 2025 |
| Industriservice Ing Yngve Midtfjell AS | Jevnaker | 1999 |
| Industristål AS | Skien | 2015 |
| Industrivarer AS | Namsos | 1995 |
| Industriveien 10 AS | Hagan | 1997 |
| Industriveien 13 Kristiansund AS | Kristiansund N | 2015 |
| Industriveien 17 Hagan AS | Hagan | 1931 |
| Industriveien 3 Eiendom AS | Fredrikstad | 2008 |
| Industriveien 6 a AS | Skedsmokorset | 2009 |
| Industriverktøy Idg Tools AS | Magnor | 1997 |
| Industry Tools AS | Kongsvinger | 2025 |
| Indutech AS | Skui | 2015 |
| Indutrade AB | Se 164 06 Kista | 2009 |
| Inel AS | Vinje | 2015 |
| Ineos Acetyls UK Limited | Lyndhurst, Hampshire So43 7Fg | 2020 |
| Ineos Chlorvinyls Limited | Oslo | 2001 |
| Ineos Europe AG Nuf | Stathelle | 2011 |
| Ineos Holdings Norge AS | Stathelle | 2007 |
| Ineos Quattro Financing Limited Nuf | So43 7Fg Lyndhurst, Hampshire | 2026 |
| Ineos Sales (UK) Limited Nuf | So43 7Fg Hampshire | 2013 |
| Ineos Sales Norge AS | Stathelle | 2007 |
| Inet Norge AS | Oslo | 2026 |
| Inevi AS | Oslo | 2022 |
| Inex Eiendom AS | Drammen | 1986 |
| Inf Company AB | Se-263 37 Höganäs | 2018 |
| Infectopharm Arzeimittel Und Consilium GmbH | De-64646 Heppenheim | 2021 |
| Inferno Invest AS | Jakobsli | 2004 |
| Infinera Corporation | 94089 Sunnywale, California | 2015 |
| Infinera Norway AS | Asker | 2013 |
| Infinera Operations LP | Us-19801 Wilmington, De | 2022 |
| Infineum UK Ltd | Sandnes | 1999 |