| Exoinsight AS | Information & communication | 2015 |
| Ellen og Peters Nærkjøp ANS | Wholesale & retail | 1988 |
| Facere Invest AS | Information & communication | 2004 |
| Fagernæs Eiendom Da | Real estate | 2026 |
| Fasan Holding AS | | 2024 |
| Fauma Energi AS | Real estate | 2021 |
| Festivalfabrikken AS | Construction | 2018 |
| Fin Form AS | Professional & scientific | 2024 |
| Fjeldstad Service AS | Wholesale & retail | 2011 |
| FNR Holding AS | | 2024 |
| Foldvik AS | Agriculture & fishing | 2019 |
| Foldvik Familiepark AS | Arts & recreation | 2006 |
| Foldvikveien 119 AS | Real estate | 2026 |
| Fortem Boligutleie AS | Real estate | 2024 |
| Fortem Invest AS | Real estate | 2024 |
| Fos Eiendom AS | Real estate | 2009 |
| Fossen Group AS | Wholesale & retail | 2026 |
| Fredrik Rist Holding AS | | 2022 |
| Fredrik Østberg AS | Real estate | 2005 |
| Fredriksvern Eiendom AS | Real estate | 2014 |
| Fredriksvern Fisk AS | Real estate | 1999 |
| Fremo AS | Manufacturing | 1988 |
| Friberg Holding AS | Financial services | 2012 |
| Fridlund Plast Og Båt AS | Manufacturing | 1991 |
| Fritidsmotor AS | Wholesale & retail | 2025 |
| Fritzøe Planteskole AS | Agriculture & fishing | 2019 |
| Front Solutions AS | Professional & scientific | 2024 |
| Fryyd AS | | 2021 |
| Frøimport Norge AS | Wholesale & retail | 2019 |
| Fredriksvern Motorverksted A/S | Real estate | 1944 |
| G.T Snekkerfirma AS | Construction | 2013 |
| Gent Import AS | Wholesale & retail | 2026 |
| Gether AS | Professional & scientific | 1994 |
| Gether Botanisk AS | Professional & scientific | 2019 |
| Glimt Stavern AS | Manufacturing | 2005 |
| Gmo Invest Larvik AS | | 2020 |
| Goebel AS | Real estate | 2000 |
| Gonveien 65 AS | Real estate | 2023 |
| Goodplace AS | Professional & scientific | 2025 |
| Grevle Vann- Og Avløp AS | Water & waste | 2024 |
| Grevle Vann- Og Avløpslag SA | Water & waste | 2023 |
| Grevlelunden Vann Og Avløpslag SA | Water & waste | 2026 |
| Grill Dress AS | Hospitality | 2020 |
| Grønn Eiendom AS | Real estate | 2008 |
| Gul Eiendom AS | Real estate | 2005 |
| Gumserød Fritidsgård AS | Arts & recreation | 2024 |
| Gusland Holding AS | | 2019 |
| Gustav Piene AS | Real estate | 1998 |
| H. Sannes Holding AS | | 2023 |
| Harrington Holding AS | Wholesale & retail | 2005 |
| Haugene Holding AS | Real estate | 1998 |
| Havfuglen AS | Real estate | 2023 |
| Havfuglen Café AS | Hospitality | 2024 |
| Hegdalbakken 7 AS | Construction | 2015 |
| Heiba AS | Wholesale & retail | 2024 |
| Herma AS | Professional & scientific | 2010 |
| Herol Miljø AS | Administrative & support | 2018 |
| Hijo Invest AS | Professional & scientific | 2022 |
| Hildes Renhold AS | Administrative & support | 2009 |
| Hines Holding AS | | 2025 |
| HKS Entreprenør AS | Construction | 2022 |
| HNG Holding AS | | 2025 |
| Holmene AS | Education | 2012 |
| Holtens AS | Manufacturing | 2012 |
| Honningfall AS | | 2024 |
| Horst Holding AS | | 2025 |
| Houlberg Holding AS | | 2017 |
| Hummerbakken AS | Real estate | 2016 |
| Hummerbakken Holding AS | Professional & scientific | 2017 |
| Hushjelpen Da | Administrative & support | 1997 |
| Husvik Hugin AS | Transport & logistics | 2014 |
| Husvik Munin AS | Wholesale & retail | 2014 |
| Hvvin AS | Professional & scientific | 2023 |
| Højd AS | Professional & scientific | 2025 |
| Ibag AS | | 2017 |
| Il Monte AS | Financial services | 2005 |
| Image Press AS | Professional & scientific | 1985 |
| Indie Bazaar AS | Other services | 2026 |
| Infotavle-Mediscreen AS | Administrative & support | 2010 |
| Ing. Carl B. Hagen AS | Wholesale & retail | 2025 |
| Ingunnshage AS | Professional & scientific | 2022 |
| Inotek AS | Professional & scientific | 2022 |
| Inotek Solar AS | Administrative & support | 2022 |
| Inotek Unmanned Solutions AS | Professional & scientific | 2022 |
| Inovamares AS | Professional & scientific | 2016 |
| Insekta AS | Administrative & support | 1992 |
| Interiør Vestfold AS | Wholesale & retail | 1994 |
| Intra AS | Wholesale & retail | 1986 |
| Intra Holding AS | Wholesale & retail | 1986 |
| Ischael AS | Arts & recreation | 2022 |
| Iver AS | Professional & scientific | 2024 |
| Jaa Investering AS | | 2026 |
| Jannes AS | Wholesale & retail | 2014 |
| Jaran Mathisen & Sønner AS | Construction | 1989 |
| Jensen Group AS | Manufacturing | 2012 |
| JG Eiendom AS | Real estate | 2025 |
| JG Kapital AS | | 2025 |
| JM2 Invest AS | | 2021 |
| Johnny Friberg AS | | 2019 |
| Jordmarken AS | Real estate | 2021 |