| Hviding & Kulleseid Maskin/Utleie Da | Kvernaland | 1996 |
| Hvit Drift AS | Tønsberg | 2020 |
| Hvitt & Grønt AS | Hønefoss | 2025 |
| Hvitvask AS | Bergen | 2018 |
| HVK Utleie AS | Skotselv | 2014 |
| HW Hotell & Restaurang AB | Se-871 53 Härnösand | 2022 |
| HW Utleie Ans | Sævelandsvik | 2011 |
| HXR Renholdsproffen AS | Alta | 2016 |
| Hydramech Solutions AS | Eiken | 2014 |
| Hydratight Ltd | West Midlands Ws10 8Ql | 2015 |
| Hydro Assets AS | Nyborg | 2026 |
| Hydro Building Systems Belgium N V | Be-3400 Landen | 2023 |
| Hydro Energy Group Ltd | London Ec1V 2Nx | 2019 |
| Hydro Rein Sweden AB Nuf | Se-111 57 Stockholm | 2026 |
| Hydro Service AS | Rørvik | 2023 |
| Hydro-X AS | Brumunddal | 2025 |
| Hydrocosmos | Se 62357 Hemse | 2010 |
| Hydrowise Ltd | Glasgow G31 2Lx Scotland | 2015 |
| Hyen Transport AS | Hyen | 2011 |
| Hygienegruppen AS | Arnatveit | 2009 |
| Hylland Utleie AS | Godvik | 2025 |
| Hymar AS | Brekke | 2017 |
| Hymec Solutions AS | Mandal | 2026 |
| Hyo AS | Kristiansand S | 2024 |
| Hypak AS | Son | 2026 |
| Hyperborea Ans | Alta | 1998 |
| Hyr AS | Harstad | 2021 |
| Hyr Helgeland AS | Mosjøen | 2026 |
| Hyr Nordland AS | Harstad | 2023 |
| Hyr Rekruttering AS | Harstad | 2016 |
| Hyre AS | Oslo | 2017 |
| Hyrox World GmbH Nuf | De-22765 Hamburg | 2025 |
| Hyrt AS | Stavanger | 2025 |
| Hyrt Holding AS | Stavanger | 2023 |
| Hysello AS | Birkeland | 2024 |
| Hysj AS | Kråkerøy | 2026 |
| Hytech AS | Klepp Stasjon | 2005 |
| Hytech Consultants AS | Sola | 2022 |
| Hytech Norse Offshore AS | Sola | 2000 |
| Hytech Personell AS | Sola | 2004 |
| Hytech Personnel DK | Sola | 2019 |
| Hytech Rental AS | Klepp Stasjon | 2013 |
| Hytte Og Eiendomsservice AS | Gålå | 2023 |
| Hytte- Og Eiendomservice AS | Halden | 2020 |
| Hytte- Og Friluftsmessen AS | Levanger | 2024 |
| Hyttehjørnet AS | Flå | 2026 |
| Hyttemessen AS | Sandefjord | 2013 |
| Hytteservice Da | Alvdal | 2002 |
| Hytteservice Rumker AS | Søndeled | 2019 |
| Hytteservice Vest AS | Lundegrend | 2013 |
| Hyttevakta AS | Rennebu | 2022 |
| Hyve AS | Ørje | 2025 |
| Hywind AS | Stavanger | 2010 |
| Hábmera Basse Hamarøy Renhold AS | Drag | 2022 |
| Häst & Sport Resor Sverige AB | 76010 Bergshamra | 2005 |
| Hågensen Drift Og Vedlikehold AS | Rypefjord | 2025 |
| Hågå Aktiv Ans | Averøy | 1999 |
| Håkensen Service AS | Gressvik | 2021 |
| Håkon Ims Produksjoner AS | Oslo | 2016 |
| Håkon Simonsen Og Knut Frøysaa Hageservice Ans | Vennesla | 1998 |
| Håkon Simonsen Utleie AS | Vennesla | 2011 |
| Håkonsen Og Sukke Landskapsentreprenør AS | Stokke | 2012 |
| Håkå Invest AS | Espa | 2017 |
| Håland Vaktmesterservice AS | Kristiansand S | 2020 |
| Hålogaland Bygg & Anlegg AS | Ankenes | 2015 |
| Hålogaland Festivalservice AS | Harstad | 2004 |
| Hålogaland Utleie AS | Sortland | 2020 |
| Håmsø Patentbyrå Holding AS | Stavanger | 2022 |
| Hån Vindpark AB | Se-653 40 Karlstad | 2023 |
| Håndtlangeren AS | Fagerstrand | 2019 |
| Håndverk & Hage AS | Fjellstrand | 2018 |
| Håndverkersentralen AS | Fyllingsdalen | 2024 |
| Håndverksspesialisten AS | Askim | 2004 |
| Håpets Katedral AS | Fredrikstad | 2018 |
| Håvask AS | Nærbø | 2018 |
| Hægeland Vei AS | Hægeland | 2021 |
| Hætta Maskin AS | Maze | 2024 |
| Hættas Opplevelser AS | Kautokeino | 2019 |
| Höegh Autliners K.K | Oslo | 2011 |
| Höegh Autoliners (India) PVT. Ltd | Oslo | 2011 |
| Hø Eigedom AS | Volda | 2025 |
| Hødal AS | Askim | 1999 |
| Høg Drift AS | Trondheim | 2012 |
| Høgesynvegen SA | Aurdal | 1970 |
| Høgkjølen Drift Og Vedlikehold Ans | Fannrem | 1987 |
| Høgnes Bygdeservice AS | Lunner | 2023 |
| Høgruta Jotunheimen/Haute Route Norge SA | Lom | 2015 |
| Høgseth Eiendomsservice AS | Mo I Rana | 2026 |
| Høgseth Maskin & Utleie AS | Arendal | 2022 |
| Høgås Driftsmidler AS | Tårstad | 2024 |
| Høien Rental AS | Egersund | 2024 |
| Høigilt Maskin Og Utleie AS | Tveit | 2022 |
| Høiseth Utleie AS | Krokelvdalen | 2024 |
| Høistad Invest AS | Hamar | 1998 |
| Høksås Kompetanse AS | Mandal | 2023 |
| Hølands Fest Utleie AS | Bjørkelangen | 2024 |
| Hølonda Utleieservice AS | Korsvegen | 2025 |
| Hønefoss by AS | Hønefoss | 2022 |
| Hønefoss Og Omegn Bygdeservice SA | Hønefoss | 2003 |
| Hønefoss Reisebyrå AS | Hønefoss | 1983 |