| Flekkefjord Bytelt AS | Arts & recreation | 2004 |
| Flekkefjord Båt Og Motor AS | Wholesale & retail | 2021 |
| Flekkefjord Eiendom AS | Real estate | 2020 |
| Flekkefjord Elektro AS | Construction | 1990 |
| Flekkefjord Golins Trafikkskole AS | Education | 2023 |
| Flekkefjord Hage Og Anlegg AS | Construction | 2014 |
| Flekkefjord Havn Abelnes AS | Transport & logistics | 2010 |
| Flekkefjord Housing AS | Real estate | 2020 |
| Flekkefjord Hudpleieklinikk Da | Other services | 2008 |
| Flekkefjord Kaffebrenneri AS | Manufacturing | 2022 |
| Flekkefjord Kiropraktorklinikk AS | Health & social care | 2020 |
| Flekkefjord Kommunebygg AS | Real estate | 1979 |
| Flekkefjord Kranbil & Transport AS | Transport & logistics | 2005 |
| Flekkefjord Landhandel SA | Wholesale & retail | 2026 |
| Flekkefjord Legesenter AS | Health & social care | 2016 |
| Flekkefjord Marina AS | Wholesale & retail | 2016 |
| Flekkefjord Minilager AS | Construction | 2023 |
| Flekkefjord Næringspark SA | Administrative & support | 2024 |
| Flekkefjord Og Omegn Drosjesentral Da | Transport & logistics | 2003 |
| Flekkefjord Og Omegn Skogplantelag AS | Agriculture & fishing | 1952 |
| Flekkefjord Opplæringssenter AS | Education | 2012 |
| Flekkefjord Parkeringsselskap AS | Transport & logistics | 1999 |
| Flekkefjord Polstring AS | Construction | 2024 |
| Flekkefjord Rør & Varme AS | Construction | 2014 |
| Flekkefjord Searaft AS | Arts & recreation | 2024 |
| Flekkefjord Shipping AS | Transport & logistics | 1995 |
| Flekkefjord Slipp AS | Real estate | 2004 |
| Flekkefjord Sparebank | Financial services | 1837 |
| Flekkefjord Trafikkskole AS | Education | 2013 |
| Flekkefjord Utleie AS | Administrative & support | 2026 |
| Flekkefjord Utstyrshandel AS | Wholesale & retail | 2012 |
| Flekkefjord Øyeklinikk AS | Health & social care | 2023 |
| Flekkefjordbanen AS | Transport & logistics | 2016 |
| Flekkefjordsklinikken AS | Health & social care | 2017 |
| Flikka Holding AS | | 2012 |
| Flikke AS | Real estate | 2010 |
| Fodnestøl Holding AS | Administrative & support | 2021 |
| Formidling AS | Real estate | 2024 |
| Fraril AS | Real estate | 2012 |
| Frisk Fisk AS | Agriculture & fishing | 2016 |
| Froland Eiendomsutvikling AS | Real estate | 2013 |
| FSB 1 AS | | 2025 |
| Fuglehuset Interiør AS | Wholesale & retail | 2011 |
| Futurum Holding AS | Real estate | 2012 |
| Fø Eiendom AS | Real estate | 2013 |
| Fø Utvikling AS | Real estate | 2010 |
| G Holm Holding AS | | 2022 |
| Gaus Bygg AS | Construction | 2019 |
| Gaus Eiendom AS | Real estate | 2025 |
| Gausdal Holding AS | | 2023 |
| Gilje Holding AS | Construction | 2013 |
| GLG Holding AS | Real estate | 2025 |
| Gmhk Invest AS | Real estate | 2006 |
| Gmy AS | Professional & scientific | 1992 |
| Gnizt Strategisk Design AS | Professional & scientific | 2009 |
| Golden Cheetah AS | | 2018 |
| Golins Trafikkskole AS | Education | 2005 |
| Goll Og Penga AS | | 2021 |
| Grand Hotell Eiendom AS | Real estate | 2001 |
| Grand Hotell Flekkefjord AS | Hospitality | 2013 |
| Grov Solution AS | Professional & scientific | 2024 |
| Grønnes Barnehage SA | Education | 1989 |
| Grønnes Brygge AS | Real estate | 2000 |
| Grøtteland Veilag SA | Real estate | 2003 |
| GS Sag Og Maskin AS | Manufacturing | 2021 |
| H K Åsly AS | Real estate | 2007 |
| H2KST AS | | 2025 |
| Halvor Invest AS | Financial services | 2005 |
| Halvorsen Rør AS | Construction | 1995 |
| Hameo Invest AS | Real estate | 2005 |
| Hath Invest AS | Construction | 2008 |
| Hedinn HF | Wholesale & retail | 2002 |
| Hest Eiendom AS | Real estate | 2023 |
| Hetland Eiendom Flekkefjord AS | Real estate | 2005 |
| Hevreka Invest AS | Financial services | 2005 |
| HG Eiendom AS | Real estate | 2004 |
| Hidra Havbruk AS | Agriculture & fishing | 2016 |
| Hjelleset Klima AS | Construction | 2011 |
| Hjertebakst AS | Manufacturing | 2024 |
| Hjerterom Flekkefjord AS | Real estate | 2018 |
| HMS Konsulenten AS | Health & social care | 2016 |
| Hobby Og Ting AS | Wholesale & retail | 2020 |
| Holm AS | Construction | 1989 |
| Holm Eiendom AS | Construction | 1979 |
| Hope 1 AS | | 2026 |
| Hope 2 AS | | 2026 |
| Horjen AS | Wholesale & retail | 1990 |
| Horjen Eiendom AS | Real estate | 1969 |
| Hos Mona Garnbutikk AS | Wholesale & retail | 2021 |
| Hos Åkke AS | Hospitality | 2026 |
| Hud Og Spa-Klinikken AS | Other services | 2008 |
| Husebø Eiendom Flekkefjord AS | Real estate | 2004 |
| Husebø Holding AS | Real estate | 2005 |
| Hybrid Systemdesign AS | Professional & scientific | 2026 |
| Hyndla AS | Professional & scientific | 2019 |
| Hystad Shipping AS | Transport & logistics | 2004 |
| Ide Film & Videoproduksjon Ans | Information & communication | 1989 |
| Idé Holding Flekkefjord AS | Real estate | 2005 |
| Imotek AS | Professional & scientific | 2011 |
| Impetus Advanced Finite Element Analyses AS | Professional & scientific | 2006 |