| Helonor AS | | 2020 |
| Herculano Transport AS | Transport & logistics | 2018 |
| Hestvedtødegården AS | Other services | 2025 |
| HG Norway AS | Wholesale & retail | 2006 |
| Hideous Monster AS | Information & communication | 2022 |
| Hjertehagen AS | Education | 2013 |
| HNH Isolering AS | Construction | 2018 |
| HNT Konsult AS | Health & social care | 2017 |
| Holdbart AS | Wholesale & retail | 2015 |
| Holding 35 AS | Wholesale & retail | 2020 |
| Holm Holding AS | | 2024 |
| Holms Nabolagscafé, the Coffee Shop AS | Hospitality | 2023 |
| Homemade Burek AS | Hospitality | 2024 |
| HP Garasjen AS | Other services | 2025 |
| Hudhelseklinikken AS | Health & social care | 2013 |
| Hult Holding AS | Professional & scientific | 2019 |
| Humar AS | Construction | 2024 |
| Husplan AS | Real estate | 2015 |
| Husvenn AS | Construction | 2026 |
| Hylander Holding AS | Professional & scientific | 2016 |
| Hylkon AS | Professional & scientific | 2025 |
| Hytteveien 11 AS | Real estate | 2021 |
| Håkon Holløkken AS | Wholesale & retail | 1976 |
| Håndverksbakeriet AS | Manufacturing | 2011 |
| Hærnes Byggtjeneste AS | Construction | 1994 |
| Høgda Auto AS | Wholesale & retail | 2023 |
| Høgdaveien 2 AS | Real estate | 1982 |
| Høgdaveien 5 AS | Real estate | 2022 |
| Høigaard AS | Health & social care | 2002 |
| Høiland Elektro AS | Construction | 2025 |
| Hørningen AS | Real estate | 2022 |
| I Nuet Da | Wholesale & retail | 2025 |
| Iceburn AS | Wholesale & retail | 2016 |
| Ie Utstyr AS | Administrative & support | 2023 |
| Igni AS | Manufacturing | 2018 |
| Igni Trade AS | Real estate | 1993 |
| Ildfast AS | Manufacturing | 2013 |
| Ile AS | Construction | 2018 |
| Imerys Minerals Ltd | Wholesale & retail | 1998 |
| Import Pack AS | Wholesale & retail | 2021 |
| Industrilakkering Eiendom AS | Real estate | 1994 |
| Insta Rør&Rehab AS | Construction | 2023 |
| Intuition Management AS | Professional & scientific | 2012 |
| Investom AS | | 2020 |
| Investor Forvaltning AS | | 1992 |
| Investregnskap AS | Professional & scientific | 2026 |
| Isolasjonsdragen Da | Construction | 1995 |
| J&J Ulin AS | | 2024 |
| J.M.S Invest AS | Professional & scientific | 2023 |
| Jabbar Holding AS | Real estate | 2023 |
| Jakobsen Engros AS | Wholesale & retail | 2026 |
| Jakol AS | Construction | 2015 |
| Jame Holdning AS | | 2021 |
| Jan L Westby Karosseri & Lakk AS | Other services | 2008 |
| Jarlsberg Yrkesklær Vestby AS | Wholesale & retail | 2021 |
| Jaros Holding AS | Wholesale & retail | 2020 |
| Jcu AS | Financial services | 2015 |
| Jegstad Invest AS | Real estate | 2013 |
| JFL AS | Construction | 2019 |
| JG Next AS | Professional & scientific | 2025 |
| Jhu AS | Manufacturing | 2005 |
| Ji Bygg AS | Construction | 1994 |
| Jke Design Nuf | Wholesale & retail | 2003 |
| JMB AS | Wholesale & retail | 2015 |
| Jmph AS | Agriculture & fishing | 2018 |
| Joh-Salg AS | Manufacturing | 1958 |
| Joh. Johannson Kaffe AS | Manufacturing | 1960 |
| Johan Herman Wessels Vei 99 AS | Real estate | 2000 |
| Johnsrudhuset Barnehage AS | Education | 2022 |
| Josephine Skredderservice AS | Other services | 2018 |
| JS Studio AS | Wholesale & retail | 2018 |
| Jørnsåsen Eiendom AS | Real estate | 2018 |
| K-Lyd Da | Construction | 2021 |
| K.Høiland Holding AS | | 2026 |
| Kaeser Kompressorer AS | Wholesale & retail | 1990 |
| Kalaba Tekniske Tjenester AS | Construction | 2017 |
| Kambo Seniorsenter AS | Real estate | 2006 |
| Kanonpris AS | Administrative & support | 2014 |
| Kaya Bilpleie AS | Other services | 2018 |
| Kbe Eiendom AS | Real estate | 2024 |
| Kbi Design AS | Wholesale & retail | 1997 |
| Key Consult Holding AS | | 2018 |
| Kirkeveien 8 AS | Real estate | 2006 |
| Kiropraktor Peer Sørnes AS | Health & social care | 2015 |
| Kjenslimoen AS | Agriculture & fishing | 2007 |
| Kjetil Giskås Bilteknisk Konsulent AS | Professional & scientific | 2011 |
| Kjøter Holding AS | | 2021 |
| Kleiver Eiendom AS | Real estate | 2007 |
| Klungland Invest AS | | 2019 |
| Knit Norway AS | Wholesale & retail | 2018 |
| Kontorsentret Moderne Stålkontorer AS | Wholesale & retail | 1963 |
| Kraft Trening AS | Arts & recreation | 2020 |
| Kringla Konditori Ans | Wholesale & retail | 1992 |
| Kristiansen & Narozny Holding AS | | 2025 |
| Kroerbarnehagen Da | Education | 2011 |
| Kroerveien 3 AS | Real estate | 2021 |
| Krom Eiendom AS | Real estate | 2016 |
| Krypinn AS | Real estate | 2010 |
| Kvaenvn. 9 AS | Real estate | 2025 |
| Kvist Holding AS | Professional & scientific | 2005 |