| Haslesenteret AS | Real estate | 1997 |
| Hasoh AS | Financial services | 2017 |
| Hatamontcg AS | Wholesale & retail | 2025 |
| Hato Ans | Wholesale & retail | 1995 |
| Haugan Holding AS | | 2019 |
| Haugen Elektroservice Nuf | Construction | 2004 |
| Haukaas Vekst AS | Professional & scientific | 2013 |
| Haukenes Invest AS | Administrative & support | 2019 |
| Haukerød Bil AS | Real estate | 1939 |
| Haukerød Grill AS | Hospitality | 2013 |
| Haukerød Hage Og Skog AS | Wholesale & retail | 2010 |
| Haukerød Jordvanning SA | Agriculture & fishing | 1983 |
| Haukerød Puben AS | Hospitality | 2016 |
| Hauptmann AS | Professional & scientific | 2016 |
| Hav - Vira AS | | 2014 |
| Hav Og Vin AS | Hospitality | 2009 |
| Havard Odden Invest AS | | 2022 |
| Havenstrøm Bilpleie AS | Other services | 2025 |
| Havenstrøm Bilressurs AS | Wholesale & retail | 2018 |
| Havgløtt Holding AS | Wholesale & retail | 2005 |
| Havlyst Invest AS | Professional & scientific | 2020 |
| HB Produkter AS | Wholesale & retail | 2004 |
| HBL Invest AS | Professional & scientific | 2005 |
| HC Sandefjord AS | Other services | 2016 |
| He Utleie AS | Real estate | 2015 |
| He-Borgeskogen AS | Real estate | 2005 |
| He-Byparken AS | Real estate | 2005 |
| He-Gleditschgården AS | Real estate | 2006 |
| He-Grønligata AS | Real estate | 2005 |
| He-Hangarveien AS | Real estate | 2005 |
| He-Hjertnespromenaden AS | Real estate | 2005 |
| He-Origo AS | Real estate | 2016 |
| Heads Up Sandefjord AS | Other services | 2022 |
| Health Workers AS | Wholesale & retail | 2005 |
| Healthy Vending AS | Wholesale & retail | 2018 |
| Hector AS | Wholesale & retail | 1999 |
| Heda Eiendom AS | Real estate | 2023 |
| Hedberg AS | Professional & scientific | 2012 |
| Hedel Gadiel AS | Professional & scientific | 2021 |
| Heer Holding AS | | 2025 |
| Hegdahl Skog AS | Agriculture & fishing | 2014 |
| Hegdalveien 67B AS | Real estate | 2025 |
| Heidiblomst Rygge | Arts & recreation | 2013 |
| Heidun AS | Construction | 2005 |
| Heidun Eiendom AS | Real estate | 2020 |
| Heier Investment AS | Real estate | 2016 |
| Heiko AS | Professional & scientific | 2008 |
| Heimborg AS | Wholesale & retail | 2017 |
| Heimdalbygg AS | Real estate | 1976 |
| Heimrand AS | | 2026 |
| Heincken Holding AS | Health & social care | 2023 |
| Heisbeskytteren AS | Construction | 2021 |
| Hejo Holding AS | | 2004 |
| Hekras Plater Og Underholdning Ans | Information & communication | 1996 |
| Hela Bakke AS | Real estate | 2015 |
| Hele Holding AS | | 2019 |
| Helena Cosmetics AS | Wholesale & retail | 1993 |
| Helgerødveien 109 AS | Real estate | 2016 |
| Helgerødveien 130 AS | Real estate | 2025 |
| Helicopter Holding AS | Administrative & support | 2023 |
| Helitrack AS | Education | 2018 |
| Hella AS | | 2025 |
| Hellandodden Båtbrygge SA | Arts & recreation | 1998 |
| Hellandodden Va-Anlegg SA | Water & waste | 1994 |
| Helle Bruk AS | Agriculture & fishing | 1909 |
| Helleborg AS | Professional & scientific | 2019 |
| Hellebust Consulting AS | Professional & scientific | 2023 |
| Hello Tomorrow AI AS | Information & communication | 2025 |
| Help Transport AS | Transport & logistics | 2024 |
| Helse Vu AS | Health & social care | 2022 |
| Helsefix AS | Health & social care | 2025 |
| Helsehavnen AS | Health & social care | 2024 |
| Helsepsykologen AS | Health & social care | 2023 |
| Hem Bollingmo Holding AS | Professional & scientific | 2009 |
| Hems Transport AS | Transport & logistics | 1990 |
| Hemsgata 30 AS | Real estate | 2026 |
| Hene Films AS | Information & communication | 2015 |
| Henka Revisjon AS | Professional & scientific | 2015 |
| Henrik Berggren Holding AS | | 2025 |
| Henry & Co AS | Wholesale & retail | 2022 |
| Heo Invest AS | Real estate | 1995 |
| Hest-Invest AS | | 2020 |
| HG Gruppen AS | Wholesale & retail | 2005 |
| HGB Holding AS | Other services | 2019 |
| Hh-Eiendom AS | Real estate | 2014 |
| Hidrigenica AS | Real estate | 2020 |
| High Seas AS | Manufacturing | 1988 |
| Hii Global Trading AS | Wholesale & retail | 2022 |
| Hildrum Prosjekt Og Invest AS | Real estate | 2021 |
| Hills Holding AS | Financial services | 2005 |
| Himberg AS | Real estate | 2020 |
| Himberg Gård AS | Agriculture & fishing | 2020 |
| Hinderveien 1 AS | Real estate | 2017 |
| Hinderveien 4 AS | Real estate | 2018 |
| Hinderveien 8 AS | Real estate | 1997 |
| Hinderveien AS | Real estate | 1999 |
| Hippocrene AS | | 2024 |
| Hiseni Investment AS | | 2017 |
| Historic Perspectives AS | Arts & recreation | 1995 |
| Hit Husa Integrerte Teknologitjenester Ans | Professional & scientific | 1987 |