| Holmefjord AS | Wholesale & retail | 2006 |
| Holmeide Holding AS | Information & communication | 2005 |
| Holmem Kraft AS | Energy | 2007 |
| Holmen & Oksavik Eiendom Ans | Professional & scientific | 1991 |
| Holmen AS Bilgummiverksted | Other services | 1991 |
| Holmen Auto AS | Other services | 1997 |
| Holmen Brygge Holding AS | Real estate | 2025 |
| Holmen Eiendomsinvest AS | Real estate | 2019 |
| Holmen Fondsforvaltning AS | Financial services | 2010 |
| Holmen Logopedi Da | Health & social care | 2006 |
| Holmen Minilager AS | Real estate | 2004 |
| Holmen Studios AS | Information & communication | 2025 |
| Holmenfaret Panorama AS | Real estate | 2023 |
| Holmenfaret Utvikling AS | Real estate | 2021 |
| Holmengata 4 AS | Real estate | 2025 |
| Holmenhavna Eiendom AS | Real estate | 2018 |
| Holmenkollen Eiendom AS | Real estate | 2018 |
| Holmenkollen Eiendomsselskap AS | Real estate | 2007 |
| Holmenkollen Fitness AS | Education | 2009 |
| Holmenkollen Invest Eiendom AS | Real estate | 2004 |
| Holmenkollen Minimat AS | Wholesale & retail | 2010 |
| Holmenkollen Park Hotel Ans | Real estate | 1989 |
| Holmenkollen Pengeformidling AS | Real estate | 2022 |
| Holmenkollen Skifestival AS | Arts & recreation | 2014 |
| Holmenkollen Sport AS | Manufacturing | 2012 |
| Holmenkollen Treningslab AS | Education | 2019 |
| Holmenkollveien 1 AS | Real estate | 2008 |
| Holmenkollveien 104 AS | Real estate | 2011 |
| Holmenkollveien 119 AS | Real estate | 1933 |
| Holmenkollveien 36 AS | Real estate | 2016 |
| Holmenkollveien 43 Eiendom AS | Real estate | 2014 |
| Holmenkollveien 96 AS | Real estate | 2007 |
| Holmenseter AS | Real estate | 1998 |
| Holmenveien 1 Oslo AS | Real estate | 2004 |
| Holmenveien 11 AS | Real estate | 2009 |
| Holmenveien 20 AS | Real estate | 1979 |
| Holmenveien 30 AS | Real estate | 2022 |
| Holmenveien 37 AS | Real estate | 2017 |
| Holmenveien 37DEF AS | Real estate | 2021 |
| Holmenveien 5 AS | Real estate | 1999 |
| Holmenveien 9 AS | Real estate | 2022 |
| Holmeslandholding AS | | 2019 |
| Holmestrand Kombibygg AS | Real estate | 2021 |
| Holmestrandit AS | Information & communication | 2026 |
| Holmestrandsveien 117 AS | Real estate | 2017 |
| Holmgang Holding AS | | 2020 |
| Holmgata Holding AS | | 2025 |
| Holmien AS | | 2022 |
| Holmies AS | Real estate | 2024 |
| Holmlia Apotek AS | Wholesale & retail | 2015 |
| Holmlia Butikkdrift AS | Wholesale & retail | 2011 |
| Holmlia Dagligvare AS | Wholesale & retail | 2021 |
| Holmlia Gym Da | Arts & recreation | 2009 |
| Holmlia Innkvartering AS | Real estate | 2015 |
| Holmlia Interiør & Farve AS | Wholesale & retail | 2026 |
| Holmlia Kulturkafe Ideelt AS | Hospitality | 2018 |
| Holmlia Legesenter AS | Health & social care | 2001 |
| Holmlia Matbutikk AS | Wholesale & retail | 2026 |
| Holmlia Optometri AS | Wholesale & retail | 1997 |
| Holmlia Pizza AS | Hospitality | 2026 |
| Holmlia Renhold AS | Administrative & support | 2021 |
| Holmlia Restaurantdrift AS | Hospitality | 2022 |
| Holmlia Senter Fysioterapi AS | Health & social care | 2025 |
| Holmlia Sentervei AS | Real estate | 2008 |
| Holmlia Sentervei Drift AS | Real estate | 2019 |
| Holmlia Tannlegekontor AS | Health & social care | 2017 |
| Holmlia Tannlegesenter AS | Health & social care | 2016 |
| Holmlia Torg AS | Wholesale & retail | 2019 |
| Holmr AS | | 2024 |
| Holmris B8 AS | Wholesale & retail | 2010 |
| Holms Hus Holding AS | Real estate | 2021 |
| Holmsbrekkodden Renseanlegg SA | Water & waste | 2025 |
| Holmsbu AS | Transport & logistics | 1998 |
| Holmsbu Eiendom AS | Real estate | 2005 |
| Holmsen Holding AS | Information & communication | 2024 |
| Holmsens Elektro AS | Construction | 2013 |
| Holmseth Lieth AS | Information & communication | 2020 |
| Holmsåsen Fus Barnehage AS | Education | 2018 |
| Holmtvet Holding AS | Real estate | 2005 |
| Holmvin AS | | 2019 |
| Holocap AS | Information & communication | 2017 |
| Holocare AS | Professional & scientific | 2019 |
| Holocene AS | Real estate | 2021 |
| Holom Holding AS | Financial services | 2017 |
| Holonorman Holding AS | Health & social care | 2021 |
| Holovegen 57 AS | Real estate | 2025 |
| Holst & Fleischer AS | Wholesale & retail | 1987 |
| Holst Invest AS | Financial services | 1991 |
| Holst-Larsen AS | | 2023 |
| Holstad Consulting AS | Professional & scientific | 2017 |
| Holstad Holding AS | Other services | 2007 |
| Holstad Vedlikehold Ans | Construction | 2013 |
| Holstegaarden AS | Real estate | 2005 |
| Holstein Eiendom AS | Real estate | 2009 |
| Holstein Invest AS | Real estate | 1996 |
| Holsten Holding AS | Construction | 2020 |
| Holsten Music AS | Arts & recreation | 2022 |
| Holsthenriksen Invest AS | | 2020 |
| Holsts Gate 1 AS | Real estate | 2023 |
| Holsts Gate 9 AS | Real estate | 2016 |