| Haugaland Byggespesialisten AS | Skjoldastraumen | 2020 |
| Haugaland Byggpartner AS | Kolnes | 2025 |
| Haugaland Elektro AS | Karmsund | 2025 |
| Haugaland Fjellboring AS | Skjold | 2012 |
| Haugaland Hus AS | Kopervik | 2018 |
| Haugaland Kjøleservice AS | Ølen | 1997 |
| Haugaland Klimateknikk AS | Haugesund | 2026 |
| Haugaland Kystservice AS | Kopervik | 2020 |
| Haugaland Malerproff AS | Aksdal | 2022 |
| Haugaland Malerservice AS | Haugesund | 2018 |
| Haugaland Mesterbygg AS | Skjold | 2020 |
| Haugaland Mur & Flis AS | Karmsund | 2023 |
| Haugaland Rørleggertjenester AS | Kopervik | 2016 |
| Haugaland Rørspyling AS | Haugesund | 2021 |
| Haugaland Tregulvservice AS | Haugesund | 2021 |
| Haugaland Varmepumper AS | Aksdal | 2026 |
| Haugalandsveggen AS | Haugesund | 2014 |
| Haugamoen AS | Vågå | 2021 |
| Haugan Bygg & Maskin AS | Mosjøen | 2013 |
| Haugan Elektro AS | Sætre | 2005 |
| Haugan Entreprenør AS | Uvdal | 2021 |
| Haugansvekst AS | Tolvsrød | 2026 |
| Hauge & Bryplass Entreprenør AS | Stavanger | 2025 |
| Hauge Asfalt AS | Haukeland | 2009 |
| Hauge Byggteknikk AS | Oslo | 2014 |
| Hauge Elektro AS | Oslo | 1987 |
| Hauge Forskaling AS | Husnes | 2008 |
| Hauge Forvaltning AS | Husnes | 2016 |
| Hauge Maskin AS | Eiken | 1982 |
| Hauge Service AS | Hylkje | 2026 |
| Haugebo Maskin AS | Gjerstad | 2019 |
| Haugelihus AS | Grålum | 1989 |
| Haugen & Reitan AS | Molde | 2003 |
| Haugen & Svendsen Invest AS | Skien | 2003 |
| Haugen & Øien Da | Vikhammer | 2005 |
| Haugen Anlegg Og Transport AS | Sørkjosen | 2024 |
| Haugen Betong AS | Finsland | 2025 |
| Haugen Bygg & Service AS | Stavanger | 2013 |
| Haugen Bygg AS | Stathelle | 2006 |
| Haugen Bygg-Service AS | Valle | 2006 |
| Haugen Elektro AS | Melhus | 2019 |
| Haugen Elektro Automasjon AS | Sola | 2022 |
| Haugen Elektroservice Nuf | Sandefjord | 2004 |
| Haugen Entreprenør AS | Gaupne | 2023 |
| Haugen Installasjon AS | Trondheim | 2009 |
| Haugen Isolering AS | Moss | 2017 |
| Haugen Kjøletekniske AS | Hjellestad | 1993 |
| Haugen Maskin & Transport Da | Konsvikosen | 2005 |
| Haugen Montasje AS | Oslo | 2023 |
| Haugen Sprengningsservice AS | Fana | 1993 |
| Haugen VVS AS | Andebu | 2021 |
| Haugen&Karlsen Holding AS | Geithus | 2024 |
| Haugen-Bygg AS | Hjartdal | 2021 |
| Haugenbakken AS | Sætre | 2020 |
| Haugenes Bygg AS | Færvik | 2024 |
| Haugens Rør AS | Alta | 2011 |
| Haugenstua Bygg AS | Oslo | 2024 |
| Haugenveien 1 AS | Vinterbro | 2011 |
| Hauger Bygg & Eiendom AS | Drammen | 2012 |
| Haugerud VVS AS | Oslo | 2024 |
| Hauges Venner AS | Straume | 2025 |
| Haugestøl VVS AS | Bø I Telemark | 1999 |
| Haugesund Automasjon AS | Avaldsnes | 1998 |
| Haugesund Blikk AS | Førresfjorden | 2022 |
| Haugesund Bygg & Eiendom AS | Haugesund | 2020 |
| Haugesund Elektriske Forretning AS | Haugesund | 1925 |
| Haugesund Gulvservice AS | Haugesund | 2025 |
| Haugesund Malerservice AS | Haugesund | 2019 |
| Haugesund Maling Og Tapetsering AS | Haugesund | 2022 |
| Haugesund Rep AS | Aksdal | 2022 |
| Haugesund Tak & Terrasse AS | Haugesund | 2020 |
| Haugesund Takservice AS | Karmsund | 2004 |
| Haugesund Ventilasjon Service AS | Avaldsnes | 1994 |
| Haughom Maskin AS | Tonstad | 2014 |
| Haugland Bygg AS | Gvarv | 2018 |
| Haugland Byggteknikk AS | Stokke | 2020 |
| Haugland Maskin AS | Hestvika | 2017 |
| Haugland VVS AS | Vennesla | 1998 |
| Haugland-Byggservice AS | Kalandseidet | 2022 |
| Haugnæss Rør AS | Melhus | 1970 |
| Haugnæss VVS AS | Melhus | 2026 |
| Haugo Entreprenør AS | Kviteseid | 2016 |
| Haugo Invest AS | Kviteseid | 2021 |
| Haugo Spesialoppdrag AS | Dalen | 2021 |
| Haugrud Brønnboring AS | Leira I Valdres | 2012 |
| Haugrudbygg AS | Røn | 2008 |
| Haugs Håndlaft AS | Fyresdal | 2020 |
| Haugsgardane Maskinlag AS | Granvin | 2012 |
| Haugsnes Eiendom AS | Båtsfjord | 2016 |
| Haugsnes Elektro AS | Båtsfjord | 1995 |
| Haugsnes Holding AS | Åfjord | 2022 |
| Haugstad Holding AS | Gol | 2005 |
| Haugstad Invest AS | Gol | 2005 |
| Haugsøen Sjø & Maskin AS | Søreidgrend | 2025 |
| Haugåsstubben 14 AS | Stavanger | 2009 |
| Hauk Sveinsson AS | Skien | 1996 |
| Hauk Sveinsson Gruppen AS | Skien | 2020 |
| Haukaas Elektro AS | Tinn Austbygd | 2020 |
| Haukaas Utvikling AS | Tinn Austbygd | 2020 |
| Haukalid Bygg AS | Sandnes | 2005 |