| Havyard Elektro AS | Leirvik I Sogn | 2021 |
| Haw AS | Ski | 2024 |
| Hawk Intelligent Technologies GmbH Nuf | De-91413 Neustadt An Der Aisch | 2025 |
| HB Lyd Og Lys AS | Voss | 2024 |
| HB Utemiljø Da | Nordkisa | 2026 |
| HBB Montasje AS | Arendal | 2025 |
| Hbmu Invest AS | Mosjøen | 2018 |
| HBT Pubdrift AS | Tromsø | 2019 |
| HC Consult AS | Oslo | 2017 |
| HC Telefon & Sekretærtjeneste Da | Trondheim | 1999 |
| Hcconsulting AS | Oslo | 2025 |
| HD Footprint AS | Fyllingsdalen | 2020 |
| HD Holding AS | Fyllingsdalen | 2021 |
| HD Hyundai Oslo Liaison Office Nuf | Oslo | 2019 |
| HD Invest AS | Ålesund | 2001 |
| HD Utleie Levanger Ans | Levanger | 1999 |
| He Drift AS | Oslo | 2020 |
| HEAD4MORE International AS | Oslo | 2011 |
| Headhunteren AS | Oslo | 2020 |
| Headhunterinfo AS | Oslo | 2019 |
| Headhunting AS | Sandeid | 2023 |
| Headliner AS | Kristiansand S | 2018 |
| Headnorth AS | Oslo | 2015 |
| Headon Holding AS | Oslo | 2025 |
| Headon Rekruttering AS | Oslo | 2025 |
| Headquarter AS | Oslo | 2002 |
| Heads Recruitment Ltd | Gb-M41 6Ey Manchester | 2016 |
| Headvisor AS | Bergen | 2003 |
| Heartland Adventure AS | Moss | 2023 |
| Heat Sauna AS | Stavanger | 2024 |
| Heb AS | Horten | 2009 |
| Heber Hodejeger AS | Oslo | 2021 |
| Hedda Rådgivning AS | Ranheim | 2012 |
| Heddas Holding AS | Oslo | 2026 |
| Heddi AS | Oslo | 2019 |
| Hedmark Reisebyrå AS | Elverum | 2000 |
| Hedmark Utemiljø AS | Løten | 2015 |
| Heen JR AS | Lierskogen | 2020 |
| Heffenings AS | Lysaker | 2020 |
| Heft AS | Oslo | 2025 |
| Hege R. Aspelund AS | Sandvika | 2014 |
| Heggeli Adventures AS | Nordkjosbotn | 2025 |
| Heh Drosjeutleie AS | Oslo | 2020 |
| Hehe Invest AS | Lillestrøm | 2022 |
| Heia Nord-Norge AS | Harstad | 2021 |
| Heide Bedriftsrenhold AS | Barkåker | 2023 |
| Heidem Facility Services AS | Tornes I Romsdal | 2023 |
| Heidi Og Eigil Johannessen Ans | Skien | 1999 |
| Heike Vask & Vedlikehold AS | Moss | 2012 |
| Heiland AS | Gjerstad | 2007 |
| Heim Haugo AS | Dalen | 2014 |
| Heimdal Travel AS | Tromsø | 2024 |
| Heimdal Vaktmesterservice AS | Heimdal | 2002 |
| Heimdall Guard Service AS | Bodø | 2014 |
| Heimdall Guard Service Helgeland AS | Bodø | 2025 |
| Heimstad AS | Kvam | 2006 |
| Heimstaden Group Norway AS | Oslo | 2020 |
| Heimstaden Netherlands B.V. | 1101Cn Amsterdam | 2024 |
| Heipetter AS | Helgeroa | 2020 |
| Heisenberg AS | Oslo | 2018 |
| Heistad AS | Sparbu | 2016 |
| Heit Bergen AS | Laksevåg | 2023 |
| HEITMANN NORGE Norsk avdeling av utenlandsk foretak NUF | Sarpsborg | 1995 |
| Heitromsø AS | Tromsdalen | 2025 |
| Hekk Og Hage AS | Kristiansand S | 2001 |
| Hekklipperen AS | Kopervik | 2004 |
| Hektar Kameratene AS | Larvik | 2024 |
| Hektoens Garage AS | Vear | 2026 |
| Helbast AS | Saltrød | 2014 |
| Helcion Maritime Consultants | Fo-700 Klaksvik | 2014 |
| Heldal Maskininvest AS | Lillesand | 1998 |
| Heldal Services AS | Laksevåg | 2026 |
| Helder Maritiem | 2908 Lw Capelle Aan Den Ijssel | 2022 |
| Helgawil AS | Oslo | 2026 |
| Helge Rongved AS | Siggerud | 2017 |
| Helge S Invest AS | Melhus | 2020 |
| Helgeland Bemanning AS | Mosjøen | 2024 |
| Helgeland Bil Og Maskinutleie AS | Mosjøen | 2005 |
| Helgeland Eiendom Og Utstyr AS | Sandnessjøen | 2018 |
| Helgeland Event Mo I Rana AS | Mo I Rana | 2023 |
| Helgeland Hopp Og Sprett AS | Husby | 2023 |
| Helgeland Hytteservice Da | Dønna | 2006 |
| Helgeland Lydservice AS | Tjøtta | 2015 |
| Helgeland Maskin & Drift AS | Dalsgrenda | 2026 |
| Helgeland Naturliv Ans | Trofors | 1996 |
| Helgeland Offshore AS | Hommersåk | 2019 |
| Helgeland Skyssbåt AS | Dønna | 2013 |
| Helgeland Tak Og Terrasserens AS | Herøy | 2023 |
| Helgeland Trafikkselskap AS | Lovund | 2012 |
| Helgeland Utleie Service AS | Mosjøen | 2021 |
| Helgeland Vakt Og Service AS | Sandnessjøen | 2014 |
| Helges Holding AS | Sola | 2022 |
| Helgesen Entreprenørservice AS | Sande I Vestfold | 2023 |
| Helgesen Maskin AS | Finnsnes | 2026 |
| Helgesen Maskinutleie AS | Søgne | 2009 |
| Helgheim Holding AS | Steinsland | 2014 |
| Helgå Invest AS | Ramnes | 2016 |
| Helgø Meny Drift AS | Stavanger | 2012 |
| Helgøy Båt AS | Helgøy I Ryfylke | 2015 |
| Heli 1 AS | Kleppe | 2006 |