| Hard'N Heavy Records AS | Wholesale & retail | 2017 |
| Hargau AS | Professional & scientific | 2015 |
| Hartington Eiendom AS | Real estate | 2005 |
| Haru Elektro AS | Construction | 2022 |
| Haso AS | Hospitality | 2010 |
| Hatlo AS | Real estate | 1983 |
| Hatlo Eiendom AS | Real estate | 2017 |
| Hatlo Holding AS | | 2022 |
| Hatlo Invest AS | | 2023 |
| Haugen Auto Senter Ans | Administrative & support | 1982 |
| Heddalsvegen 23 Notodden AS | Real estate | 2017 |
| Heddalsvegen 46-52 Notodden AS | Real estate | 2022 |
| Heddalsvegen 49 Notodden AS | Real estate | 2017 |
| Heddalsveien 15 AS | Real estate | 2015 |
| Hedrum Cementstøperi AS | Manufacturing | 1966 |
| Hegdal AS | | 2015 |
| Hegdal Eiendom AS | Real estate | 1996 |
| Hegdal Eiendomsholding AS | | 2005 |
| Hegdal Industribygg AS | Manufacturing | 2001 |
| Hegdalringen 11 AS | Real estate | 2015 |
| Hegdalringen 16 AS | Real estate | 2020 |
| Hegdalringen 24-26 AS | Real estate | 2022 |
| Hegdalringen 4 AS | Real estate | 2022 |
| Hegdalringen 42 AS | Real estate | 2000 |
| Hegdalringen 46 AS | Real estate | 2003 |
| Hegdalringen 6 AS | Real estate | 2019 |
| Hegdalringen AS | Construction | 2000 |
| Hegdalsringen 19-1 AS | Real estate | 2011 |
| Hegdalsringen 23-27 Larvik AS | Real estate | 2012 |
| Hegdalveien 105 AS | Real estate | 2008 |
| Hegdalveien 108 AS | Real estate | 2024 |
| Hegdalveien 52 AS | Real estate | 2023 |
| Hegdalveien 63 a AS | Real estate | 2020 |
| Hegdalveien 63C AS | Real estate | 2020 |
| Hegdalveien 65 AS | Real estate | 2024 |
| Hegdalveien 67 a AS | Real estate | 2015 |
| Hegdalveien 76 AS | Real estate | 2006 |
| Hegdalveien 77 AS | Real estate | 2004 |
| Hege Frisør AS | Other services | 2021 |
| Hego AS | Real estate | 2007 |
| Heil Ved AS | Real estate | 1994 |
| Heimdal Utleie AS | Real estate | 2011 |
| Heimdalsveien 3 AS | Real estate | 2016 |
| Hejda Holding AS | | 2025 |
| Hektar Kameratene AS | Administrative & support | 2024 |
| Hektor Holding AS | | 2025 |
| Hel Økonomi AS | Professional & scientific | 1989 |
| Helgeroveien 99-101 AS | Real estate | 2017 |
| Helitep Holding AS | Manufacturing | 2022 |
| Hell Events AS | Administrative & support | 2009 |
| Hellenes IT AS | Wholesale & retail | 2022 |
| Hellestvedt Eiendom AS | Real estate | 2013 |
| Helping Hands, Happy Homes AS | Administrative & support | 2026 |
| Helt Maskin AS | Construction | 2020 |
| Helt-Propell AS | Education | 2015 |
| Hem Capital AS | | 2021 |
| Hem Eiendom AS | Real estate | 1997 |
| Henrik Lysnes Holding AS | | 2025 |
| Henriksen Group Eiendom AS | Real estate | 2025 |
| Heral Sko Reparasjon AS | Other services | 2019 |
| Herbaria AS | Wholesale & retail | 2025 |
| Herholdt Leinæs Holding AS | Financial services | 2005 |
| Herman Nilsen & Sønner AS | Manufacturing | 2016 |
| Herregården AS | Hospitality | 1997 |
| Hesselbergtak BVT AS | Construction | 2021 |
| Hetty Carlsen Holding AS | | 2026 |
| Heum Eiendom AS | Real estate | 2010 |
| Heum Holding AS | Wholesale & retail | 2016 |
| Heyerdahl Eiendom AS | Real estate | 2023 |
| Heyns Fysikalske Institutt AS | Health & social care | 1997 |
| HG Bygg AS | Construction | 2020 |
| HG Entreprenør AS | Real estate | 2021 |
| HG Racing AS | Real estate | 2015 |
| HHH3 AS | | 2021 |
| High Quality Products Ans | Wholesale & retail | 1993 |
| Highland Eikelund AS | Manufacturing | 2023 |
| Hih Invest AS | | 2023 |
| Himberg Eiendom AS | Real estate | 2020 |
| Himberg Vedlikehold AS | Construction | 1990 |
| Hipa Invest AS | Real estate | 2020 |
| Hitz Optikk AS | Wholesale & retail | 2018 |
| Hjelpemann Svein - Thore Abrahamsen AS | Construction | 2014 |
| Hjelten Holding AS | Real estate | 2021 |
| Hjermstad Invest AS | | 2023 |
| Hjertholmen Rorbuer AS | Real estate | 2020 |
| Hjertø AS | Professional & scientific | 2013 |
| HJV24 AS | Real estate | 2006 |
| Hjørnet Pøbb Da | Hospitality | 2014 |
| HKV Vei AS | Administrative & support | 2022 |
| HL Drift AS | Administrative & support | 2017 |
| HL Konsult AS | Professional & scientific | 2026 |
| HM Eiendom Larvik AS | Wholesale & retail | 2013 |
| HN & S Holding AS | | 2016 |
| Hne Holding AS | | 2005 |
| Ho Teknikk Da | Arts & recreation | 2025 |
| Holbein Holding AS | Construction | 2021 |
| Holeveien AS | Real estate | 2021 |
| Holhjem Invest AS | | 2021 |
| Holmejordetveien 11 AS | Real estate | 2018 |
| Holmejordetveien 15 AS | Real estate | 2018 |