| Interiør Line AS | Nittedal | 2021 |
| Interiør Narvik AS | Harstad | 2019 |
| Interiør Og Beslag AS | Drammen | 2013 |
| Interiør Opas AS | Heimdal | 1995 |
| Interiør Service Rogaland AS | Sandnes | 2024 |
| Interiør Studio AS | Rådal | 2024 |
| Interiør Tønsberg AS | Nøtterøy | 2025 |
| Interiør Vestfold AS | Stavern | 1994 |
| Interiør-Galleriet AS | Oslo | 1987 |
| INTERIØR24 AS | Hønefoss | 2016 |
| Interiøragenturer J. Sveen AS | Oslo | 1982 |
| Interiørbutikken Nina AS | Halden | 2014 |
| Interiørdesign Ans | Tynset | 1990 |
| Interiørdesign AS | Oslo | 1990 |
| Interiørdetalj AS | Oslo | 1989 |
| Interiørfruene AS | Lillesand | 2018 |
| Interiørgleder.No AS | Straumsgrend | 2010 |
| Interiørhjørnet Da | Sande I Vestfold | 2004 |
| Interiørhuset AS | Storslett | 2001 |
| Interiørhuset AS | Godvik | 1996 |
| Interiørhuset Gjøvik AS | Gjøvik | 2017 |
| Interiørhuset Kongsvinger Ans | Kongsvinger | 2000 |
| Interiørhuset Larvik AS | Larvik | 2013 |
| Interiørkompaniet AS | Kvaløya | 2011 |
| Interiørkupp AS | Jessheim | 2020 |
| Interiørsenteret AS | Leira I Valdres | 2015 |
| Interiørsenteret AS | Gol | 1998 |
| Interiørsenteret Trøndelag AS | Verdal | 1999 |
| Interiørservice Hemsedal AS | Hemsedal | 2006 |
| Interiørstudio Tromsø AS | Tromsø | 2018 |
| Interiørtema AS | Oslo | 1986 |
| Interiørtre AS | Gjøvik | 2015 |
| Interiørverden AS | Kirkenes | 1994 |
| Interkit AS | Hagan | 2009 |
| Interkolonial SA | Langhus | 2006 |
| Interlight AS | Fornebu | 1997 |
| Interlink AS | Grimstad | 1991 |
| Intermat AS | Hitra | 2015 |
| Intermat Sandnes AS | Hommersåk | 2025 |
| Intermec Technologies AB | Oslo | 1996 |
| Intermec Technologies European Partnership CV | Oslo | 2000 |
| Intermed AS | Trondheim | 2024 |
| Intern-Logistikk AS | Solbergelva | 2013 |
| Internasjonal Mat AS | Jørpeland | 2024 |
| Internasjonal Matsenter AS | Stavanger | 2012 |
| Internasjonal-Mat-Bryne AS | Bryne | 2026 |
| International Book Distributors Ltd | Herts Hp2 4Rg England | 1995 |
| International Brands AS | Oslo | 2021 |
| International Bullies AS | Oslo | 2015 |
| International Cooperation AS | Bergen | 2019 |
| International Farbenwerke GmbH | De-20097 Hamburg | 2025 |
| International Food and Transport AS | Ulset | 2019 |
| International Holding AS | Stavanger | 1996 |
| International Lighting Systems AS | Billingstad | 2020 |
| International Logging Technology Limited | Leicestershire Le12 6Jx England | 2004 |
| International Matsenter AS | Tromsø | 1991 |
| International Merchandiser AS | Trondheim | 2020 |
| International Paint Limited | Berkshire Sl2 5Ds | 2024 |
| International Sales and Services BV | Oslo | 1998 |
| International Tools AS | Rådal | 1998 |
| International Trading Group AS | Rødberg | 2023 |
| International Trading Group Itg AS | Oslo | 2012 |
| International Vintners AS | Oslo | 2020 |
| Internetstores GmbH | De-70174 Stuttgart | 2015 |
| Internetwork AS | Bodø | 2017 |
| Interni Oslo AS | Oslo | 1975 |
| Internova Aviation - Marine - Surface AS | Oslo | 1993 |
| Interoptik AS | Sandvika | 1994 |
| Interpadel Shop AS | Sandnes | 2021 |
| Interpress Norge AS | Lillestrøm | 2001 |
| Interprint AS | Alta | 2015 |
| Interroll AS | Drammen | 1991 |
| Intersalg AS | Holmedal | 2012 |
| Interscan Ma AS | Vatne | 1999 |
| Intersection AS | Oslo | 2009 |
| Intersource Aps | Dk-1104 København K | 2021 |
| Intersource Norway AS | Skien | 2025 |
| Intersport Askim AS | Askim | 2023 |
| Intersport Beitostølen AS | Beitostølen | 2015 |
| Intersport Bodø AS | Bodø | 1984 |
| Intersport Bogstadveien AS | Oslo | 1982 |
| Intersport Brotorvet AS | Stathelle | 2021 |
| Intersport City Syd AS | Tiller | 2023 |
| Intersport Eidsvoll AS | Råholt | 2013 |
| Intersport Evje AS | Evje | 1998 |
| Intersport Fauske AS | Fauske | 2023 |
| Intersport Filefjell AS | Tyinkrysset | 2015 |
| Intersport Finnsnes AS | Finnsnes | 1976 |
| Intersport Flekkefjord AS | Flekkefjord | 1987 |
| Intersport Fosnavåg AS | Fosnavåg | 1992 |
| Intersport Førde Erdal Sport AS | Førde | 1971 |
| Intersport Geilo AS | Geilo | 2010 |
| Intersport Gol AS | Gol | 2015 |
| Intersport Grong AS | Grong | 2019 |
| Intersport Halden AS | Halden | 2021 |
| Intersport Hammerfest AS | Hammerfest | 2001 |
| Intersport Haugesund AS | Haugesund | 1971 |
| Intersport Holmestrand AS | Holmestrand | 2004 |
| Intersport Honningsvåg AS | Honningsvåg | 2004 |
| Intersport Kongsberg AS | Kongsberg | 2026 |