| Holding 1 AS | Oslo | 2022 |
| Holding Eiendom 1 AS | Klavestadhaugen | 2019 |
| Holding Investment AS | Tertnes | 2017 |
| Holding Mur Og Flis AS | Eidsvoll | 2017 |
| Holding of Oiled Slade AS | Florø | 2017 |
| HOLDING19 AS | Vaksdal | 2023 |
| Holdø Tak Og Membran AS | Svolvær | 2010 |
| Hole Anlegg AS | Straumgjerde | 2023 |
| Hole Bygg AS | Krokkleiva | 2021 |
| Hole Glass AS | Bergen | 2019 |
| Hole Graveservice AS | Røyse | 2019 |
| Hole Kjerneboring & Betongsaging AS | Røyse | 2020 |
| Hole Nielsen Bygg AS | Sandsli | 2020 |
| Hole VVS AS | Sæbøvågen | 2013 |
| Holen Bygg AS | Langevåg | 1981 |
| Holen Bygg Og Vedlikehold AS | Fredrikstad | 2020 |
| Holen Installasjon AS | Sogndal | 1989 |
| Holen Maskin AS | Sandnes | 2016 |
| Holen Mur & Puss AS | Langevåg | 1976 |
| Holen Naturstein AS | Lye | 2020 |
| Holen Rørleggerservice AS | Gan | 2006 |
| HOLGERS1 AS | Bergen | 2022 |
| Holgersen Mur Og Fliser AS | Rong | 2004 |
| Holland Aqua Sight | 1724 Bg Oudkarspel | 2026 |
| Holland Scherming BV | Oslo | 2010 |
| Holland Ship Electric B.V. | 3088 Hj Rotterdam | 2023 |
| Hollandia Structures BV | 4794 Sn Heijninhen | 2015 |
| Hollensen Energy | Fagerstrand | 2006 |
| Holleviken AS | Gol | 2017 |
| Holm Andersen Service AS | Steinsland | 2012 |
| Holm AS | Flekkefjord | 1989 |
| Holm Bygg Og Maskin AS | Nesbyen | 2002 |
| Holm Bygg Og Montasje AS | Kristiansund N | 2023 |
| Holm Byggpartner AS | Hommersåk | 2025 |
| Holm Byggservice AS | Trondheim | 2019 |
| Holm Co Bygg AS | Kristiansand S | 2025 |
| Holm Eiendom AS | Flekkefjord | 1979 |
| Holm Elektro AS | Molde | 1993 |
| Holm Entreprenør AS | Alta | 2012 |
| Holm Grunn Og Eiendom AS | Ytre Enebakk | 2025 |
| Holm Invest Holding AS | Trondheim | 2019 |
| Holm Maskinstasjon AS | Kvelde | 2021 |
| Holm VVS AS | Fjerdingby | 2015 |
| Holm-Larsen Holding AS | Åsgårdstrand | 2022 |
| Holmaas Invest AS | Os | 2026 |
| Holmberg Og Eide AS | Borgenhaugen | 2015 |
| Holmboe Multiservice AS | Stadlandet | 2018 |
| Holmedal Elektriske AS | Holmedal | 2023 |
| Holmeide Maskintjenester AS | Tingvoll | 2015 |
| Holmen Bygg AS | Etne | 2025 |
| Holmen Hage Og Anlegg AS | Hauge I Dalane | 2022 |
| Holmen Investering AS | Hebnes | 2009 |
| Holmen Maskin AS | Hebnes | 2017 |
| Holmerud Flis Og Membran AS | Nordby | 2017 |
| Holmeset Bygg AS | Vatne | 1998 |
| Holmestad Vedlikehold Og Rådgivning AS | Tverrelvdalen | 2024 |
| Holmestrand Bygg AS | Sande I Vestfold | 2022 |
| Holmestrand Fjellsprenging AS | Sundbyfoss | 2003 |
| Holmestrand Rørleggerbedrift AS | Holmestrand | 1971 |
| Holmestrand Rørservice AS | Sande I Vestfold | 2025 |
| Holmium Eiendom AS | Larvik | 2013 |
| Holmko Bygg AS | Kongsberg | 2025 |
| Holms Elektro AS | Namsos | 2019 |
| Holms Rør AS | Kløfta | 2022 |
| Holmsbu Drift AS | Holmsbu | 2025 |
| Holmsbu Haandverk AS | Holmsbu | 2013 |
| Holmsens Elektro AS | Oslo | 2013 |
| Holmskau Tre Og Betong AS | Fredrikstad | 2024 |
| Holmskog Holding AS | Rolvsøy | 2005 |
| Holmstrand Subsea AS | Vormedal | 2025 |
| Holmstranda AS | Bjerka | 2013 |
| Holsen Snikkarverkstad AS | Førde | 2025 |
| Holsjø AS | Tromsø | 2025 |
| Holst Bygg Og Service AS | Kristiansand S | 2025 |
| Holst Service & Montering AS | Fjellstrand | 2016 |
| Holstad Maskin AS | Hareid | 2022 |
| Holstad Maskin Holding AS | Hareid | 2022 |
| Holstad Vedlikehold Ans | Oslo | 2013 |
| Holsten Holding AS | Oslo | 2020 |
| Holsæter Bygg Og Anleggsgartnar AS | Førde | 2025 |
| Holt & Ikon Ans | Lillestrøm | 2026 |
| Holt / Gjøen AS | Norheimsund | 2021 |
| Holt Byggservice AS | Ramnes | 2026 |
| Holta & Helgeland Ans | Jørpeland | 2006 |
| Holtan Entreprenør AS | Larvik | 2021 |
| Holtan Industrier AS | Sandefjord | 1991 |
| Holte Bygg AS | Gjøvik | 2006 |
| Holte Entreprenør AS | Fevåg | 2023 |
| Holte Ildsted Og Piperehabilitering AS | Hvitsten | 2022 |
| Holtebu VVS AS | Værøy | 2025 |
| Holtefjell AS | Hokksund | 1982 |
| Holtefjell Laft AS | Skotselv | 2011 |
| Holtefjell Maskin AS | Hokksund | 2018 |
| Holten Maskin AS | Surnadal | 1999 |
| Holten Montasje AS | Molde | 2020 |
| Holtenborg AS | Haugesund | 2021 |
| Holtengruppen AS | Nordby | 2020 |
| Holter Regelarmaturen GmbH & Co KG | De-33758 Schloss Holthe-Stukenbrock | 2018 |
| Holter VVS AS | Frogner | 2014 |
| Holterbygg AS | Grong | 2016 |