| Haaland Service AS | Etne | 2026 |
| Haandbryggeriet AS | Drammen | 1989 |
| Haarberg AS | Rissa | 2007 |
| Haarsaker Service AS | Tiller | 2012 |
| Haarslev Industries Nuf | 5471 Søndersø | 2010 |
| Haatre Design AS | Mauseidvåg | 2021 |
| Haavaldsen Distillery AS | Tranby | 2025 |
| Habu Sampling AS | Tananger | 2011 |
| Haby Norske Sjalusier AS | Halden | 1995 |
| Hadeland Elektromekaniske AS | Harestua | 2020 |
| Hadeland Lås AS | Harestua | 2023 |
| Hadeland Pulverlakk AS | Jaren | 2015 |
| Hadeland Service Og Vedlikehold AS | Gran | 2021 |
| Hadeland Viltslakteri AS | Jevnaker | 2020 |
| Hadelandsnett Web Design Da | Brandbu | 1999 |
| Hadelandspeisen AS | Kolsås | 2015 |
| Hadi Invest AS | Ålesund | 2005 |
| Haf Power Solutions AS | Trondheim | 2019 |
| Hafenbradl Ans | Porsgrunn | 1990 |
| Hafjell Slakteri AS | Øyer | 2020 |
| Hafrsfjord Industri AS | Årdal I Ryfylke | 2025 |
| Hafrsfjord Tre AS | Stavanger | 1977 |
| Hafsil AS | Borgenhaugen | 2005 |
| Hagabråten Mekaniske AS | Fagernes | 2017 |
| Haganæs Maskin AS | Aurdal | 2026 |
| Hagavik Hjemmebakeri AS | Hagavik | 1985 |
| Hagavik Holding AS | Hagavik | 2005 |
| Hageland Kunst- Og Metallstøperi AS | Holum | 2005 |
| Hageløkken Engineering AS | Vågå | 2024 |
| Hagema AB | 427 50 Billdal | 2008 |
| Hagen & Haslene AS | Hov | 2013 |
| Hagen AS | Stryn | 1987 |
| Hagen Maritime Eood | 1505 Sofia | 2019 |
| Hagen Sveis Og Mekk AS | Søgne | 2023 |
| Hagens Mekaniske AS | Rena | 2019 |
| Hagens Vevrammer AS | Fåberg | 2014 |
| Haghtech AS | Hvalstad | 2017 |
| Haglebu Bygg Og Anlegg AS | Eggedal | 2010 |
| Hagleskyting AS | Torød | 1992 |
| Haglund Enge Holding AS | Oslo | 2019 |
| Hagvoll Gård AS | Sannidal | 2023 |
| Hagvåg Rep-Service AS | Bøstad | 2021 |
| Hahn Fleischbearbeitungs GmbH | Kristiansand S | 2001 |
| Hahnemann Teknik AS | Straume | 2000 |
| Haiex Plastrør AS | Hønefoss | 1989 |
| Halaas Holding AS | Kristiansund N | 2005 |
| Halaas Og Mohn AS | Kristiansund N | 1992 |
| Halden Biochar Project AS | Halden | 2023 |
| Halden Bryggeri AS | Halden | 2012 |
| Halden Dental AS | Halden | 2010 |
| Halden Dental Da | Halden | 1994 |
| Halden Elektronikk AS | Tistedal | 1986 |
| Halden Mikrobryggeri AS | Halden | 2012 |
| Halden Papir, Henny Ann Eriksen, Kjell Eriksen Og Kjell Arne Eriksen Ans. | Halden | 1986 |
| Halden Rammemakeri AS | Halden | 2023 |
| Halden Tredesign AS | Tistedal | 2022 |
| Haldi AS | Birtavarre | 1998 |
| Haldor Haldorsen Mek Verksted Ans | Bekkjarvik | 1978 |
| Hale Eiendom AS | Kristiansand S | 2008 |
| Half Holding AS | Vatne | 2020 |
| Halibutboats AS | Hellesøy | 2021 |
| Halite AS | Skui | 2017 |
| Halland Instruments AS | Odda | 1998 |
| Halle System AB | Se-312 34 Laholm | 2020 |
| Halleraker Mek Verksted AS | Bremnes | 2011 |
| Halleraker Sveis Og Vedlikehold AS | Bremnes | 2021 |
| Halliburton Far East Pte Ltd | Sg-639940 Tuas | 2014 |
| Hallingdal Betong AS | Torpo | 1993 |
| Hallingdal Flisterminal AS | Ål | 2023 |
| Hallingdal Lokalmat Senter AS | Nesbyen | 2015 |
| Hallingdal Maskinservice AS | Flå | 2026 |
| Hallingdal Småmat Da | Gol | 2009 |
| Hallingdal Storkjøkken Og Kjøleservice AS | Geilo | 1996 |
| Hallingdal Trepellets AS | Ål | 2004 |
| Hallingdal Trykk AS | Gol | 1993 |
| Hallingplast AS | Ål | 1977 |
| Hallingsag AS | Ål | 2003 |
| Hallsen Holding AS | Sellebakk | 2023 |
| Hallum Tre AS | Fåvang | 2008 |
| Halsa Industri Service AS | Halsa | 2019 |
| Halsa Mekaniske AS | Halsa | 2022 |
| Halsan Kjøtt AS | Levanger | 2013 |
| Halsnøy Dokk AS | Høylandsbygd | 2012 |
| Halsports AS | Bjørøyhamn | 2017 |
| Haltdalen Landbruksverksted Ans | Haltdalen | 2008 |
| Halton Marine OY | Oslo | 2018 |
| Halvors Tradisjonsfisk AS | Tromsø | 2008 |
| Halvorsen AS | Øyestranda | 2018 |
| Halvorsen Bilservice AS | Nedre Eggedal | 2003 |
| Halvorsen Smie Og Verksted AS | Porsgrunn | 2004 |
| Halvorsens Conditori AS | Oslo | 2008 |
| Ham - Tann AS | Hamar | 2016 |
| Hamani AS | Snarøya | 2005 |
| Hamar Maskinservice AS | Hamar | 2007 |
| Hamar Salmakerverksted AS | Stange | 2012 |
| Hamco Bygg AS | Rossfjordstraumen | 2019 |
| Hamel AS | Gravdal | 2025 |
| Hamilton Storage GmbH | Ch-7013 Domat/Ems | 2021 |
| Hamjern AS | Stange | 1984 |
| Hamjern Invest AS | Hamar | 2019 |