| Frony AS | | 2019 |
| Fuglum Holding AS | | 2005 |
| Fun Music AS | Construction | 1987 |
| Furubo AS | Administrative & support | 2014 |
| Furuhallveien 8B AS | Real estate | 2008 |
| Furuspesialisten Eiendom AS | Real estate | 2012 |
| Fysioterapisenteret Hønefoss AS | Health & social care | 2005 |
| G-Utvikling AS | Real estate | 2022 |
| G.A.S. Holding AS | Real estate | 2005 |
| G.K.H Holding AS | | 2025 |
| G.R. Holding AS | Real estate | 2025 |
| G.S Bil AS | Wholesale & retail | 2022 |
| Gaarud Auto AS | Wholesale & retail | 2015 |
| Gabkri Invest AS | | 2026 |
| Gaia Investeringsselskap AS | | 2004 |
| Gamrik Invest AS | Real estate | 2025 |
| Gaot Eiendom AS | Construction | 1989 |
| Garås Gården AS | Construction | 1987 |
| Gasolin Hakadal AS | Real estate | 2010 |
| Gasolin Holding AS | Real estate | 2009 |
| Gasolin Mjøsa Vest AS | Real estate | 2010 |
| Gasolin Mjøsa Øst AS | Real estate | 2010 |
| Gasolin Molde AS | Real estate | 2010 |
| Gasolin Møre AS | Real estate | 2010 |
| Gasolin Nordland AS | Real estate | 2010 |
| Gasolin Ringerike AS | Real estate | 2010 |
| Gasolin Rykkin AS | Real estate | 2007 |
| Gasolin Sør AS | Real estate | 2010 |
| Gasolin Ullensaker AS | Real estate | 2010 |
| Gasolin Vestfold AS | Real estate | 2010 |
| Gasolin Østfold AS | Real estate | 2010 |
| Gaupeskarvegen SA | Real estate | 1953 |
| Gaute Guttormsen AS | Health & social care | 2014 |
| Gaø AS | Other services | 2021 |
| Gel Steinlegger AS | Construction | 2015 |
| Gepetto Holding AS | | 1984 |
| Gepro AS | Professional & scientific | 2015 |
| Geteve AS | Information & communication | 2024 |
| Gigstads Vei AS | Real estate | 2008 |
| Gjsr Holding AS | | 2019 |
| Gjøvik Nord AS | Real estate | 2010 |
| Glade Hjul Sykkel Og Skieksperten AS | Wholesale & retail | 2012 |
| Glade Hjul Sykkelverksted Da | Real estate | 1993 |
| Gladiator AS | Arts & recreation | 2014 |
| Glasslåven AS | Construction | 2011 |
| Gledeshuset Drift AS | Hospitality | 2017 |
| Gledeshuset Eiendom AS | Real estate | 2017 |
| Gledeshuset Holding AS | | 2014 |
| Glesne Logopedi AS | Health & social care | 2010 |
| Glimtstubben AS | Real estate | 2019 |
| Global Data Resources AS | Information & communication | 2020 |
| Glomma Butikkeiendom AS | Real estate | 2013 |
| Glyphflow AS | Information & communication | 2026 |
| GM Megling AS | | 2024 |
| Go Advice AS | Professional & scientific | 2023 |
| Go Dag Kaffe & Te Spesialen Ans | Wholesale & retail | 1990 |
| Go Labs AS | Information & communication | 2025 |
| Goa AS | Real estate | 2013 |
| God Hud Og Kropp AS | Other services | 2023 |
| Gog Holding AS | Wholesale & retail | 2008 |
| Goji Holding AS | | 2016 |
| Goldfox AS | Professional & scientific | 2024 |
| Golfmer AS | Wholesale & retail | 2025 |
| Golfservice 90 AS | Wholesale & retail | 2025 |
| Gomnes Asfalt & Utemiljø AS | Construction | 2023 |
| Gota AS | Real estate | 2022 |
| Gpng Holding AS | | 2026 |
| Gramm AS | Professional & scientific | 2026 |
| Gran Butikkeiendom AS | Real estate | 2014 |
| Gran Senter AS | Real estate | 2004 |
| Gran Spiritus AS | Manufacturing | 2017 |
| Gran Storhandel AS | Real estate | 2014 |
| Grand Hotell Hønefoss AS | Hospitality | 2000 |
| Gravdahl Invest AS | Administrative & support | 2025 |
| Grenland Handelspark AS | Real estate | 2015 |
| Grenland Handelspark Utvikling AS | Real estate | 2020 |
| Gress Service 90 AS | Wholesale & retail | 1994 |
| Gressvik Butikkeiendom AS | Real estate | 2008 |
| Grevik AS | Real estate | 2004 |
| Grimstad Butikkeiendom AS | Construction | 2009 |
| GRK Consulting AS | Professional & scientific | 2021 |
| Grom Invest AS | Financial services | 2005 |
| Grovtann AS | Health & social care | 2005 |
| Grua Sør AS | Real estate | 2008 |
| Grum Invest AS | Financial services | 2007 |
| Grøtåsen AS | Construction | 2018 |
| GS Glass AS | Wholesale & retail | 2020 |
| GS90AS AS | Wholesale & retail | 2023 |
| GSM Mobileservice AS | Other services | 2019 |
| Gtahi AS | | 2025 |
| Gulbrandsen Bil AS | Wholesale & retail | 2024 |
| Gulestø Holding AS | Wholesale & retail | 2005 |
| Gullborg Eiendom AS | Real estate | 2024 |
| Gummikrysset Eiendom AS | Real estate | 2019 |
| Gummiskogen AS | Real estate | 2019 |
| Guri Sætrang Thomassen Holding AS | Real estate | 2011 |
| Gustav Sport Norge Nuf | Wholesale & retail | 2014 |
| GV19 Invest AS | | 2024 |
| Gården Vår-Norge Da | Agriculture & fishing | 2004 |
| H. Berger Eiendom AS | Real estate | 2019 |