| Godt Nok AS | Tufsingdalen | 2022 |
| Godt Tre AS | Ålesund | 2025 |
| Godt Voksne Karer AS | Larvik | 2019 |
| Godt. Elektro AS | Hægeland | 2023 |
| Godtfredsen Maskin AS | Sulitjelma | 2024 |
| Godtland Rør Og Industriservice AS | Dalen | 2015 |
| Godvik Bergen AS | Godvik | 2021 |
| Godøy Bygg AS | Godøya | 1996 |
| Godøy Mur & Entreprenør AS | Fana | 2019 |
| Goe Bygg AS | Oslo | 2014 |
| Goelektro AS | Hakadal | 2023 |
| Gogstad Byggentreprenør AS | Sandefjord | 2016 |
| Gol Grave- Og Barkservice AS | Gol | 2022 |
| Gol Kjøl Og Frys AS | Gol | 2006 |
| Gol Kommunale Eigedomar Boligdrift AS | Gol | 2019 |
| Gol Og Hallingdal Ventilasjon Service Og Blikkenslagerbedrift AS | Nesbyen | 1989 |
| Gol Rørleggerbedrift AS | Gol | 1992 |
| Golberg AS | Gol | 1992 |
| Gold Hand Handyman AS | Kløfta | 2020 |
| Golden Bygg 1 AS | Kalandseidet | 2020 |
| Golden Bygg AS | Kalandseidet | 2018 |
| Golden Maskin AS | Farsund | 2011 |
| Golden Ratio AS | Oslo | 2025 |
| Goldenhouse Oü | Ee-65608 Võru | 2020 |
| Golding Holding AS | Rolvsøy | 2006 |
| Golflagnir Ehf | 201 Kopavogur | 2009 |
| Golspie Electrical Contractor Ltd | Gb Eastleigh So50 9Dt | 2021 |
| Golubic Inzenjering D.O.O. | Hr-10450 Jastrebarsko | 2025 |
| Goluft AS | Trondheim | 2021 |
| Golvia Allservice | Asker | 1996 |
| Golvlyftarna I Sverige AB | Se-305 96 Eldsberga | 2025 |
| Goma Bygg AS | Kristiansund N | 2016 |
| Gomnes Asfalt & Utemiljø AS | Hønefoss | 2023 |
| Gonvarri Stålteknik AB Nuf | 691 37 Karlskoga | 1996 |
| Goodtime Rental AS | Bergen | 2023 |
| Goppion Norway Nuf | It-20090 Trezzano Sul Naviglio (Mi) | 2019 |
| Gor Entreprenør AS | Oslo | 2024 |
| Goran Bygg AS | Oslo | 2012 |
| Gorbygg AS | Sandefjord | 2021 |
| Gorilla VVS AS | Bønes | 2020 |
| Gorsetekra Installasjon AS | Oppdal | 2016 |
| Gosztyla Adam Adkar Remontowo-Budlowana | 35-082 Rzeszow | 2005 |
| Got Invest AS | Vadsø | 2008 |
| Got Products AS | Mandal | 2019 |
| Gotaas Invest AS | Arendal | 2020 |
| Gothia Eldfast AB Nuf | Se-47537 Bohus-Björkö | 2022 |
| Gotov Bad & Bygg AS | Sandnes | 2020 |
| Gots AS | Hakadal | 2003 |
| Gotteberge Holding AS | Raudeberg | 2023 |
| Gottenbygg AS | Fosnavåg | 2023 |
| Govi | Askim | 2003 |
| Govind Bygg AS | Ålesund | 2021 |
| GP Bygg AS | Oslo | 2021 |
| GP Bygg Invest AS | Fornebu | 2022 |
| GP Bygg Og Håndverkstjenester AS | Kråkerøy | 2023 |
| GP Earth Spolka Z Ograniczona Odpowiedzialnoscia Nuf | 00-867 Warszawa | 2026 |
| GP Elektro AS | Oslo | 2006 |
| GP Snekkerservice AS | Hallingby | 2022 |
| GP Vegdrift AS | Hammerfest | 2017 |
| Gp-Invest AS | Sortland | 2014 |
| GPD AS | Kristiansand S | 2014 |
| GPP Byggentreprenør AS | Oslo | 2016 |
| GPS Bygg Og Montasje AS | Kongsvinger | 2025 |
| GQ Service AS | Kristiansand S | 2017 |
| GR Anlegg AS | Vinje | 2023 |
| GR Bygg AS | Ål | 2012 |
| GR Byggentreprenør AS | Skarnes | 2021 |
| GR Construction Norway AS | Oslo | 2025 |
| GR Elektro AS | Kråkerøy | 2019 |
| GR Klima AS | Skarnes | 2023 |
| GR Maskin AS | Trondheim | 2009 |
| GR Sanering AB | Son | 2001 |
| GR Solid Bygg AS | Gjerdrum | 2025 |
| Gr-Gruppen AS | Skarnes | 2012 |
| GR. Holding AS | Alta | 2011 |
| Gra Invest AS | Kristiansund N | 2023 |
| Gra-Be AS | Florvåg | 2019 |
| Grabitel Holding AS | Mo I Rana | 2021 |
| Gracan AS | Oslo | 2005 |
| Grade Roofers & Flooring AS | Oslo | 2019 |
| Gradek AS | Frosta | 2026 |
| Gradjevinar D.O.O. | Oslo | 2012 |
| Gradus Limited | Cheshire Wa14 2Dt | 2016 |
| Graf Eiendom AS | Haugesund | 2020 |
| Grahams Byggservice AS | Vestby | 2025 |
| Gral Holding AS | Kristiansand S | 2024 |
| Gramod AS | Høvåg | 2023 |
| Gran Bygg & Elektro AS | Gran | 2012 |
| Gran Consult AS | Råholt | 1995 |
| Gran Elektro AS | Bergen | 1991 |
| Gran Ly AS | Stanghelle | 2000 |
| Gran Service AS | Blaker | 2021 |
| Gran Veisenter AS | Gran | 2010 |
| Gran VVS AS | Revetal | 2003 |
| Grana Maskin AS | Rennebu | 2011 |
| Granaas Eiendom AS | Sørumsand | 2008 |
| Granaune Maskin AS | Skogn | 2023 |
| Granberg Bygg AS | Brumunddal | 2025 |
| Granberg Installasjon AS | Bærums Verk | 2015 |
| Granbo AS | Trondheim | 2025 |