| Hagfors Holding AS | Tromsø | 2018 |
| Haglebu Hytteservice AS | Eggedal | 2004 |
| Hagnes Gass Og Varme AS | Tiller | 2024 |
| Hagri Entreprenør AS | Skjeberg | 2026 |
| Hagströms Entreprenad I Sunne AB | Se-686 31 Sunne | 2020 |
| Hahe Holding AS | Ostereidet | 2015 |
| Hahe Invest AS | Rørvik | 2024 |
| Hahva Anlegg AS | Raufoss | 2024 |
| Hahva Holding AS | Raufoss | 2024 |
| Hai Maling Og Vedlikehold AS | Oslo | 2022 |
| Hailo Werk Rudolf Loh GmbH & Co KG | 35705 Haiger | 2008 |
| Hailo Wind Systems GmbH & Co.Kg Nuf | De-35708 Haiger | 2026 |
| Hajba Robert | 1184 Budapest | 2010 |
| Hajwam Jerzy Wroblewski | 84-240 Reda | 2007 |
| Hak Entreprenør AS | Alta | 2012 |
| Hakadal Bygg AS | Hakadal | 2004 |
| Hakein AS | Fetsund | 2012 |
| Haket Handelsonderneming B.V. | 2291Nr Wateringen | 2014 |
| Hakkespetten AS | Trondheim | 2017 |
| Hako Elektro AS | Oslo | 1992 |
| Hako Invest AS | Finnsnes | 2006 |
| Hako Total AS | Varhaug | 2016 |
| Hakwood Norge AS | Oslo | 2011 |
| Hal-Dach Beata Wrona | 11-430 Poczta | 2018 |
| Hala Bygg AS | Trondheim | 2015 |
| Halberg Rørleggerfirma AS | Kongshavn | 1993 |
| Halcom AS | Nittedal | 2006 |
| Halden Entreprenør AS | Halden | 2019 |
| Halden Graving & Transport AS | Halden | 2023 |
| Halden Grunn Og Anlegg AS | Halden | 1996 |
| Halden Håndverkstjenester AS | Halden | 2008 |
| Halden Rørleggerservice AS | Halden | 2010 |
| Halden Tømrerfirma AS | Tistedal | 2014 |
| Halden Varmepumpeservice AS | Halden | 2025 |
| Halden Ventilasjon AS | Fredrikstad | 2025 |
| Halden VVS AS | Halden | 2026 |
| Haldo Volla AS | Rognes | 2001 |
| Haldorsens Maskinstasjon AS | Bugøynes | 2005 |
| Haldås AS | Rykkinn | 2012 |
| Halfdan Soleim AS | Smøla | 1991 |
| Halil Serdar Sunay AS | Skien | 2019 |
| Halimi Holding AS | Oslo | 2012 |
| Hall Montasje AS | Sandefjord | 2017 |
| Hallan Maskin Og Transport AS | Skatval | 2020 |
| Halland & Fosse AS | Førde I Hordaland | 2020 |
| Hallangen Bygg & Eiendom AS | Båstad | 2014 |
| Hallberg Bygg AS | Flekkerøy | 2023 |
| Hallco AS | Algarheim | 2020 |
| Halle Holding AS | Stjørdal | 2002 |
| Hallen Aasen Rør Da | Tingvoll | 2000 |
| Halleraker Rør AS | Vikedal | 2010 |
| Hallgeir Lekven Holding AS | Os | 2022 |
| Hallgeir Sagmo AS | Steinkjer | 2007 |
| Hallgeir Tangen Anlegg AS | Oslo | 2022 |
| Hallgeir Vingen AS | Åfjord | 2016 |
| Hallin AS | Vinterbro | 2017 |
| Hallingard AS | Hemsedal | 2023 |
| Hallingard Maskin AS | Hemsedal | 2021 |
| Hallingbygg AS | Gol | 1995 |
| Hallingdal Betongsliping AS | Nesbyen | 2021 |
| Hallingdal Blikk Og Tak AS | Ål | 2021 |
| Hallingdal Brønn Og Graveservice AS | Ål | 2006 |
| Hallingdal Entreprenør AS | Nittedal | 2013 |
| Hallingdal Hyttebygg AS | Nesbyen | 2018 |
| Hallingdal Hytteservice AS | Torpo | 1987 |
| Hallingdal Hytteutvikling AS | Nesbyen | 2011 |
| Hallingdal Kjøl & Frys AS | Nesbyen | 2020 |
| Hallingdal Klima AS | Gol | 2017 |
| Hallingdal Maskinutleie AS | Nittedal | 2010 |
| Hallingdal Murerforretning AS | Nesbyen | 2002 |
| Hallingdal Peis Og Pipe AS | Gol | 2025 |
| Hallingdal Stein Og Stender AS | Flå | 2025 |
| Hallingdal Tømrerlaug AS | Nesbyen | 2020 |
| Hallingdal Varme & Sanitær AS | Nesbyen | 2001 |
| Hallingdal Varmepumpeservice AS | Nesbyen | 2025 |
| Hallingdal Ved & Kubbestolmakarlag AS | Nesbyen | 2026 |
| Hallinggruppen AS | Oslo | 2020 |
| Hallinghytter AS | Nesbyen | 2020 |
| Hallinglaft AS | Gol | 2015 |
| Hallingmast AS | Nesbyen | 1997 |
| Hallingskigard AS | Nesbyen | 2016 |
| Hallingstad Dykk AS | Finstadjordet | 2020 |
| Hallingstad Elektro AS | Gol | 2022 |
| Hallingstad Maskin & Utleie AS | Førresfjorden | 2020 |
| Hallingsveis AS | Ål | 2025 |
| Hallmaker AS | Lysaker | 1986 |
| Hallmek I Lysekil AB | 453 040 Lysekil | 2017 |
| Hallonen Invest AS | Vardø | 2021 |
| Hallstein Nortun AS | Tennfjord | 2013 |
| Hallstein Nortun Installasjon AS | Tennfjord | 2022 |
| Hallstrøm Og Skåle Malerservice Ans | Sørli | 2002 |
| Hallum Tak Og Blikk AS | Fåvang | 2014 |
| Hallvard Johansen AS | Inndyr | 2021 |
| Hallvard Olsen AS | Løvenstad | 2016 |
| Halm AS | Rykene | 2020 |
| Halonen Elektro AS | Tana | 2025 |
| Halos Eiendom AS | Oslo | 2013 |
| Hals Bygg AS | Raudeberg | 2024 |
| Halsa Biogass AS | Stord | 2024 |
| Halsa Bygg AS | Halsa | 2019 |