| Holtermannsveien 31A AS | Trondheim | 2023 |
| Holtet & Westgaard Bygg AS | Østerås | 2025 |
| Holtet Maskin Og Transport Ans | Greåker | 1999 |
| Holth Bygg & Anlegg AS | Torp | 2018 |
| Holth Elektro AS | Oslo | 2005 |
| Holth Entreprenad AS | Åsgreina | 2019 |
| Holthe 2 AS | Klæbu | 2010 |
| Holthe Anlegg AS | Krokstadelva | 2016 |
| Holthe Entreprenør Da | Hovin I Gauldal | 2007 |
| Holthe Holding AS | Kyrksæterøra | 2005 |
| Holthes Fjellsprengning AS | Skotselv | 2021 |
| Holtleite Snekkerservice AS | Ålesund | 2025 |
| Holtålen Bygg Og Handel AS | Haltdalen | 2011 |
| Holvik Fjelltransport AS | Rauland | 2023 |
| Holviklaft Da | Jøa | 1999 |
| Holzbau Frank Müller | 14806 Bad Belzig / Ot Schwanebeck | 2023 |
| Homborsund Elektro Ans | Homborsund | 1988 |
| Homborsund Elektro Installasjon AS | Fevik | 1995 |
| Home Aspelund & Skram Bygg Da | Oslo | 2005 |
| Home Improvement Ans | Haukeland | 2008 |
| Home Valley Bygg AS | Bønes | 2018 |
| Homelien Invest AS | Skotselv | 2005 |
| Hometown AS | Oslo | 2015 |
| Homme Bygg AS | Kristiansand S | 2016 |
| Homme Hus AS | Nodeland | 2018 |
| Homme-Bygg AS | Øvrebø | 2019 |
| Hommelsgård Holding AS | Vegårshei | 2024 |
| Hommen AS | Lyngdal | 2015 |
| Hommersåk Utleie AS | Hommersåk | 2011 |
| Hompen AS | Finnsnes | 2026 |
| Honerødgrenda Utbyggingsselskap SA | Tjøme | 2025 |
| Honeywell Teknoloji Anonim Sirketi Nuf | Tr-34755 Atasehir Istanbul | 2024 |
| Hongrød AS | Soknedal | 2023 |
| Honnemyr Betongsaging AS | Vennesla | 2024 |
| Honningdal AS | Tresfjord | 1999 |
| Honningdal Elektro AS | Oslo | 2019 |
| Honningsvåg Maskin AS | Stadlandet | 1982 |
| Honningsvåg Maskinstasjon AS | Honningsvåg | 1994 |
| Honsbergs El | 471 72 Hjälteby | 2010 |
| Hope Bygg & Rådgivning AS | Paradis | 2026 |
| Hope Bygg AS | Uggdal | 2011 |
| Hope Elektro AS | Fetsund | 1997 |
| Hope VVS AS | Bjørøyhamn | 2020 |
| Hopland Holding AS | Straume | 2005 |
| Hopmo Elektro AS | Bjugn | 1987 |
| Hoproof | Lv-1014 Riga | 2017 |
| Hopstad & Jensen Bygg Og Eiendom AS | Drammen | 2017 |
| Hopstad & Jensen Mur Og Flis AS | Drammen | 2009 |
| Hordaglass AS | Os | 2024 |
| Hordaland Asfalt AS | Nyborg | 2007 |
| Hordaland Betongsaging AS | Sæbøvik | 2023 |
| Hordaland Byggservice Ans | Søfteland | 1990 |
| Hordaland Eiendom AS | Stord | 2003 |
| Hordaland Elektroteknikk AS | Strandebarm | 2023 |
| Hordaland Elektroteknikk Holding AS | Strandebarm | 2023 |
| Hordaland Fjellsprengning AS | Mjølkeråen | 2017 |
| Hordaland Gulvservice AS | Kleppestø | 2015 |
| Hordaland Hus & Hage AS | Nyborg | 2017 |
| Hordaland Maler Service AS | Kalandseidet | 2017 |
| Hordaland Rørteknikk AS | Holmefjord | 2006 |
| Hordavent AS | Nesttun | 2016 |
| Hordvik Maskin AS | Nyborg | 2004 |
| Horg Multiservice AS | Trondheim | 2021 |
| Horisont & Co AS | Lysaker | 2016 |
| Horisont Bolig AS | Sande I Vestfold | 2021 |
| Horisont Håndverk AS | Fjellhamar | 2026 |
| Horisont Invest AS | Trondheim | 2005 |
| Horisontal Boring AS | Holmestrand | 2011 |
| Horisonterra Aktiebolag Nuf | Oslo | 2014 |
| Horkuc D.O.O. Nuf | Oslo | 2023 |
| Horkuc Racking KTF. | Hu-2100 Gödölo | 2023 |
| Horn Bygg AS | Trondheim | 2023 |
| Horn Elektro AS | Brønnøysund | 2022 |
| Horndalen Maskindrift AS | Rena | 2016 |
| Horneberg Bygg AS | Flatåsen | 2004 |
| Hornindal Bygg AS | Hornindal | 2020 |
| Hornnes Næringspark I AS | Hornnes | 2022 |
| Horst Soulier | Braskereidfoss | 2008 |
| Horten Blikk Og Sveis AS | Horten | 2016 |
| Horten Boligservice AS | Horten | 2026 |
| Horten Bygg Service AS | Horten | 2018 |
| Horten Elektriske AS | Ringebu | 2006 |
| Horten Elektro Service AS | Horten | 2018 |
| Horten Male Experten AS | Horten | 2024 |
| Horten Male Service AS | Horten | 2022 |
| Horten Rørleggerbedrift AS | Horten | 1983 |
| Horten Ventilasjon Service AS | Horten | 2026 |
| Horten VVS AS | Horten | 2014 |
| Hortivita Ltd Nuf | Andebu | 2009 |
| Horvathova Bygg Og Anlegg AS | Kjeller | 2026 |
| Horvei AS | Fana | 1987 |
| Horvest AS | Oslo | 2023 |
| Hoseid AS | Drangedal | 2016 |
| Hoset Spett Og Spade AS | Averøy | 2026 |
| Hosle VVS AS | Bekkestua | 2025 |
| Hoslemo Bygg AS | Kristiansand S | 2017 |
| Hospitalteknikk Norge AS | Blaker | 2014 |
| Hoste Holding AS | Hokksund | 2022 |
| Hosto AS | Tyristrand | 2022 |
| Hostvedt Maskin & Utleie AS | Hof | 2025 |