| HH Services AS | Drammen | 2021 |
| HH Solutions AB | Se-423 55 Torslanda | 2012 |
| HHG Holding AS | Reistad | 2013 |
| HHH Advisory AS | Oslo | 2026 |
| HHH Consulting AS | Oslo | 2026 |
| HHK Holding & Consulting AS | Hakadal | 2005 |
| HHN Invest AS | Oslo | 2005 |
| HHR AS | Kristiansand S | 2015 |
| Hhrock AS | Børsa | 2023 |
| Hi Consult AS | Drammen | 2005 |
| Hi End Studio Nordic AS | Grua | 2025 |
| Hi Flo AS | Lørenskog | 2014 |
| Hi Kapital AS | Valderøya | 2022 |
| Hi&Cs Limited | Middlesbrough Ts7 8Lq England | 2026 |
| Hiape AS | Oslo | 2024 |
| Hias HOW2O AS | Ottestad | 2002 |
| Hib Consulting AS | Oslo | 2021 |
| Hiba AS | Trondheim | 2005 |
| Hibas Arabiske Tolketjeneste AS | Lørenskog | 2024 |
| Hibe Consulting AS | Tolvsrød | 2025 |
| Hibis AS | Oslo | 2015 |
| Hibis Holding AS | Oslo | 2008 |
| Hibiscus AS | Vinterbro | 2020 |
| Hide Industry AS | Hønefoss | 2024 |
| Hide Management AS | Ræge | 1999 |
| Hide-X AS | Øvre Ervik | 2026 |
| Hidein AS | Gjettum | 2021 |
| Hiemeyer Ans | Drøbak | 1990 |
| Hiform AS | Vesterøy | 2009 |
| High Con AS | Stavanger | 2024 |
| High End Innovation Limited Nuf | Ke-00505 Kilimani, Nairobi | 2024 |
| High Kites Holding AS | Ski | 2023 |
| High Kites Regnskap Gardermoen AS | Jessheim | 2018 |
| High Kites Regnskap Haugesund AS | Haugesund | 2025 |
| High Kites Regnskap Oslo AS | Oslo | 2024 |
| High North Investments AS | Fjordgard | 2013 |
| High Note AS | Ålesund | 2026 |
| High Rope Solutions Ltd Nuf | London Sw16 3Ng England | 2026 |
| High Supply AS | Hønefoss | 2025 |
| High Tech Promotion AS | Oslo | 2002 |
| High Tech Solutions Nord AS | Narvik | 2015 |
| High Yield Communication AS | Bergen | 2012 |
| High-Tech Design AS | Asker | 2006 |
| Highback Design Limited | Middlesex Tw17 8Da | 2016 |
| Higheredos AS | Oslo | 2025 |
| Highgrid Consulting AB Nuf | Se-833 51 Hoting | 2026 |
| Highland Park AS | Hokksund | 2017 |
| Highlander AS | Gjerdrum | 2000 |
| Highlight Secure AS | Fiskå | 2012 |
| Highseas AS | Barkåker | 2023 |
| Highstage Norway AS | Stavanger | 2024 |
| Highstock AS | Kristiansund N | 2019 |
| Hightech Herding AS | Vennesla | 2022 |
| Hightown AS | Nesøya | 2020 |
| Highvolt Prüftechnik Dresden GmbH | De-01139 Dresden | 2023 |
| Highwind AS | Oslo | 2020 |
| Higi AS | Mandal | 1995 |
| Higo AS | Arendal | 2019 |
| Hihat Management AS | Bergen | 2005 |
| Hiis Bergh & Partnere AS | Nesttun | 2025 |
| Hijo Invest AS | Stavern | 2022 |
| Hike AS | Sandnes | 2021 |
| Hil Heeresinstandsetzungslogistik GmbH | De-53123 Bonn | 2018 |
| Hilbert Kari I Grogv | 160 Argir Faroe | 2011 |
| Hilby Entreprise AS | Dale I Sunnfjord | 2023 |
| Hilda AS | Vadsø | 2022 |
| Hilde Aksnes Regnskapsbistand AS | Oslo | 2023 |
| Hilde Bryhn AS | Oslo | 2022 |
| Hilde Invest AS | Bodø | 2000 |
| Hilde Mørk AS | Løvenstad | 1996 |
| Hilden AS | Drammen | 2012 |
| Hilding Anders International | 211 19 Malmö | 2015 |
| Hilding Invest & Advise AS | Paradis | 2014 |
| Hildonen Holding AS | Børsa | 2022 |
| Hildr 360 Nuf | Za-2057 Sandton | 2022 |
| Hill & Co Advokatfirma AS | Bergen | 2018 |
| Hill Dickinson Business Services Limited | Liverpool L3 9Sj England | 2017 |
| Hillcrest AS | Oslo | 2019 |
| Hille Arkitekter AS | Oslo | 2025 |
| Hille Hagen Consulting AS | Stavanger | 2025 |
| Hille Melbye Arkitekter AS | Oslo | 1981 |
| Hille-Strandskogen Arkitekter AS | Oslo | 2007 |
| Hilleknuten AS | Stavanger | 2003 |
| Hillenstam Exit Partner AS | Kristiansund N | 2025 |
| Hilleren Prosjektering AS | Mathopen | 2011 |
| Hillestad Digital Design AS | Isdalstø | 2022 |
| Hillestad Holding & Invest AS | Isdalstø | 2021 |
| Hillestad Prosjekt AS | Stabekk | 2016 |
| Hillestad-Consulting AS | Lommedalen | 2017 |
| Hillevi Studio AS | Oslo | 2026 |
| Hillevik AS | Bakkasund | 2008 |
| Hillside AS | Kristiansand S | 1993 |
| Hilltop AS | Kristiansand S | 2005 |
| Hilltop Holding AS | Oslo | 2017 |
| Hillvard AS | Herøysundet | 2013 |
| Hillwood AS | Tertnes | 2018 |
| Hillwood Invest AS | Tertnes | 2005 |
| Hilow AS | Oslo | 2021 |
| Hilvardin Invest AS | Sandnessjøen | 2010 |
| Him GmbH Industrie Service- Projektkoordination | De-63785 Obernburg | 2025 |