| Holtet Pukk & Betong AS | Krøderen | 2019 |
| Holtet Pukk & Betong Holding AS | Krøderen | 2018 |
| Holtet Sag Og Myr AS | Magnor | 2019 |
| Holth Produkter AS | Sande I Vestfold | 2023 |
| Holth Rep. & Metall AS | Hønefoss | 2012 |
| Holthe Eiendom AS | Kolvereid | 1985 |
| Holtop Snekkeri AS | Enebakk | 2025 |
| Holtskog Nyhuus Design Ans | Gvarv | 1982 |
| Holven Mekaniske AS | Granvin | 2002 |
| Holy Donuts AS | Valnesfjord | 2024 |
| Holzweiler Holding AS | Lysaker | 2014 |
| Holzweiler Items AS | Lysaker | 2014 |
| Homag Plattenaufteiltechnik GmbH | De-75365 Calw | 2019 |
| Homdrum Holding AS | Grendi | 2023 |
| Homdrum Welding AS | Grendi | 2023 |
| Homlagarden AS | Norheimsund | 2024 |
| Homlagarden Invest AS | Norheimsund | 2024 |
| Honeywell AB (Stockholm SE) | Se-16751 Bromma | 2014 |
| Honeywell AS | Asker | 1972 |
| Honeywell S.R.L | It- Cap 20093 Cologno Monzese (Mi) | 2023 |
| Honndalshytta AS | Hornindal | 1992 |
| Honningbonden AS | Konsmo | 2011 |
| Honningcentralen SA | Kløfta | 1927 |
| Honninglys.No AS | Kristiansand S | 2021 |
| Honningsvåg Mek Verksted AS | Honningsvåg | 1990 |
| Honningsvåg Rør Verksted AS | Honningsvåg | 2007 |
| Hooks Belysnings AB | Asker | 1995 |
| Hopen Fisk AS | Kabelvåg | 2008 |
| Hopes Tradisjonsmat AS | Skien | 2023 |
| Hophav AS | Eggkleiva | 2022 |
| Hophav Service AS | Skaun | 2021 |
| Hopmark Fisk AS | Smøla | 2023 |
| Horda Tre AS | Omastrand | 2016 |
| Hordaland Sveis & Montasje AS | Laksevåg | 2017 |
| Hordaland Trykk Og Distribusjon AS | Voss | 2017 |
| Hordasmia AS | Isdalstø | 1991 |
| Horeca Service AS | Moss | 2017 |
| Horgadalen AS | Voss | 2020 |
| Horizonte Holding AS | Mjøndalen | 2005 |
| Hornmoen Bruk AS | Elverum | 1965 |
| Horns Slakteri AS | Leknes | 1988 |
| Hornset Gård AS | Rotsund | 2025 |
| Horpestad AS | Voll | 1984 |
| Horsch Maschinen SE & Co. KG Nuf | De-92421 Schwandorf | 2022 |
| Horse Equipment Da | Holmestrand | 1992 |
| Horten Bryggeri AS | Horten | 1992 |
| Horten Mikrobryggeri AS | Horten | 2015 |
| Horten Skipsreparasjoner AS | Horten | 1988 |
| Horten Søm & Salmakerverksted AS | Horten | 2015 |
| Hosanger Mikrotrykkeri AS | Lonevåg | 2021 |
| Hosanger Trikotasjefabrikk AS | Lonevåg | 2025 |
| Hosch Norway Nuf | De-45649 Recklinghausen | 2015 |
| Hoseth Holding AS | Kristiansund N | 2004 |
| Hoseth Technology AS | Kristiansund N | 2022 |
| Hosokawa Solids Solutions GmbH | De-86830 Schwabmünchen | 2023 |
| Host Latvia Sia Nuf | Lv-1058 Riga | 2026 |
| Hostvedt Sveis Og Reparasjon AS | Skollenborg | 2019 |
| Hot Bolting AS | Nesøya | 2013 |
| Hot Nok AS | Solbergelva | 2006 |
| Hot Pot AS | Flåm | 2023 |
| House of Good People AS | Oslo | 2020 |
| House of Holmedal AS | Oslo | 2021 |
| House of Print AS | Trollåsen | 1991 |
| Houseofhopen AS | Lommedalen | 2023 |
| Hov Tre & Glass AS | Sandnes | 2004 |
| Hovdan Seil AS | Oslo | 1998 |
| Hovde Consulting AS | Henningsvær | 2011 |
| Hovde Factory Solutions AS | Stranda | 2026 |
| Hovde Maritim AS | Henningsvær | 2023 |
| Hovde Spikeri AS | Kolbu | 2018 |
| Hovde-Drangsholt Holding AS | Kristiansand S | 1992 |
| Hovden Pizzadrift AS | Kristiansand S | 2023 |
| Hovden Ved AS | Bykle | 2005 |
| Hovdenakk Maskinering AS | Ørsta | 2014 |
| Hovelsen AS | Halden | 2014 |
| Hovenga Rep Service AS | Porsgrunn | 2016 |
| Hovin Eiendom AS | Tyristrand | 2010 |
| Hovin Industritjenester AS | Støren | 2024 |
| Hovin Trevare & Jessheim Glasservice AS | Jessheim | 1998 |
| Hovland AS | Jørpeland | 2000 |
| Hovland Båt AS | Egersund | 1991 |
| Hovland Båthotell AS | Egersund | 2008 |
| Hovland Maskinservice AS | Sperrebotn | 2014 |
| Hovland Trevarefabrikk AS | Hellvik | 1972 |
| Hovtun Invest AS | Vik I Sogn | 2018 |
| Howden Maintenance Partners Belgium | Be-2070 Zwijndrecht | 2022 |
| Howden Process Compressors | Renfrew Pa4 8Xj | 2013 |
| HP Halden Pharma AS | Halden | 2023 |
| HP Rammer AS | Ørskog | 2012 |
| HP Trading Da | Hagan | 2008 |
| Hpack AS | Kristiansund N | 2024 |
| Hpi Energy Services Ltd | Lincoln Ln2 4Us | 2011 |
| HPR AS | Torvastad | 2020 |
| Hptech Spolka Z.O.O. Nuf | Pl-80-612 Gdansk | 2012 |
| HR Mekanisk AS | Stathelle | 2021 |
| HR Service Spolka Z Ograniczona Odpowiedzialnoscia Nuf | 70-030 Szczecin | 2007 |
| Hrauk AS | Røyken | 2024 |
| HRC Europe AS | Lierstranda | 1979 |
| HRH Finans AS | Bokn | 2008 |
| HRH I AS | Haugesund | 2013 |