| Cajul Holding AS | Professional & scientific | 2020 |
| Carl Hansens Brygge AS | Real estate | 2008 |
| Carwash.No AS | Other services | 2017 |
| Ce Pontoppidan AS | Construction | 2014 |
| Ce Pontoppidan Eiendom AS | Real estate | 2020 |
| Cello Håndverk AS | Construction | 2023 |
| Centralen Kragerø AS | Hospitality | 2024 |
| Champions Travel AS | Administrative & support | 2025 |
| Chriscornelli AS | Wholesale & retail | 2020 |
| CIRKA1984 AS | Information & communication | 2022 |
| Classique AS | Wholesale & retail | 1992 |
| Cocktail Brasseri Og Bar AS | Hospitality | 2025 |
| Con Anima Ans | Wholesale & retail | 2003 |
| Dahli Consulting AS | Professional & scientific | 2023 |
| Dahlia AS | Wholesale & retail | 2022 |
| Dalane AS | Real estate | 2019 |
| Dalane Bygg AS | Real estate | 1984 |
| Dalane Eiendom AS | Real estate | 2000 |
| Dalaneveien 11B | Real estate | 2004 |
| Dalaneveien 9 AS | Real estate | 2012 |
| Delecto Arbeidsinkludering AS | Health & social care | 2021 |
| Delecto Kompetanse AS | Health & social care | 2002 |
| Delecto Leverer AS | Manufacturing | 2026 |
| Denkra AS | Manufacturing | 2022 |
| Det Skjer I Kragerø Magasinproduksjon AS | Information & communication | 2016 |
| Det Skjer I Kragerø Profil Og Event AS | Arts & recreation | 2011 |
| Det Tropiske Grammofonselskab AS | Arts & recreation | 2016 |
| Digimark AS | Information & communication | 2022 |
| DNH A/S Den Norske Høyttalerfabrikk A/S | Manufacturing | 1946 |
| Dobbel Margherita AS | Hospitality | 2024 |
| Dose AS | Hospitality | 2006 |
| Dykk Og Betong AS | Construction | 2017 |
| Dyrehelse AS | Professional & scientific | 2004 |
| Easyplug AS | Manufacturing | 2023 |
| Edgar Kampers Beheer B.V. | Professional & scientific | 2008 |
| Eiendomsvask AS | Administrative & support | 2025 |
| Eita Consult AS | Professional & scientific | 2021 |
| Eke AS | Wholesale & retail | 1975 |
| Elektroinstallatør Terje Jørgensen AS | Construction | 2008 |
| Empresa Holding AS | Real estate | 2018 |
| Endresen Holding AS | Real estate | 2005 |
| Engedahl Bygg AS | Construction | 2014 |
| Epi Gym Da | Arts & recreation | 1991 |
| Espomar Services AS | Manufacturing | 2004 |
| Evas Hage AS | Wholesale & retail | 2012 |
| Family Fitness AS | Arts & recreation | 1997 |
| Fellesskapet AS | | 2011 |
| Fiber Tech AS | Information & communication | 2025 |
| Finn Mehlum Eiendom AS | Real estate | 1999 |
| Firkløver Eiendom Kragerø AS | Real estate | 2006 |
| Fiskerne Nilsen AS | Agriculture & fishing | 2005 |
| FJ Eiendom Kragerø AS | Wholesale & retail | 2014 |
| Fjeldli Holding AS | Real estate | 2015 |
| Fjellheim & Co AS | | 2026 |
| Flintstone-Holding AS | | 2025 |
| Flott Eiendom AS | Real estate | 2019 |
| FM Entreprenør AS | Construction | 2021 |
| FMB Privat Invest AS | Financial services | 2005 |
| FMG AS | Other services | 2020 |
| Folkets Hus Kragerø SA | Real estate | 2015 |
| Fonnafrakt AS | Administrative & support | 2023 |
| Fossen Trelast Eiendom AS | Real estate | 2008 |
| Fredensborg 11 AS | Real estate | 2017 |
| Fredensborg Kragerø AS | Real estate | 2018 |
| Frithjof Johnsens Eftf AS | Wholesale & retail | 1974 |
| Frode Øygarden AS | Construction | 2018 |
| Fryd Kragerø AS | Health & social care | 2023 |
| Frydensborg Gård Barnehage AS | Education | 2015 |
| Frydensborg Gård Holding AS | Education | 2015 |
| Frydensborgveien 1 Kragerø AS | Real estate | 2021 |
| Fsys AS | Information & communication | 2007 |
| Fut AS | Real estate | 2018 |
| Futurexchange AS | Information & communication | 2020 |
| Galleri Nicolines Hus AS | Wholesale & retail | 2007 |
| Gamle Meieriet AS | Real estate | 1973 |
| Ganitt Entreprenør AS | Construction | 1990 |
| Garatunet AS | Real estate | 2021 |
| GB Auto AS | Other services | 2010 |
| GB Eiendom Kragerø AS | Real estate | 2019 |
| George Dahlls Arvinger Da | Real estate | 1999 |
| Gia Holding AS | Administrative & support | 2020 |
| Gka Holding AS | Real estate | 2020 |
| Glød Holding Kragerø AS | Manufacturing | 2018 |
| Golfgarasjen AS | Administrative & support | 2023 |
| Gossa Invest AS | Financial services | 2004 |
| Grapefruit AS | Administrative & support | 2017 |
| Gromstad Bil & Båt AS | Wholesale & retail | 2001 |
| Gromstad Båtservice AS | Manufacturing | 2005 |
| Grønaasen AS | Transport & logistics | 2005 |
| Gundersen Eiendom Kragerø AS | Real estate | 2025 |
| H K Glass-Sikring Ans | | 1989 |
| H R Byggservice AS | Construction | 2009 |
| H24 Holding AS | | 2018 |
| Hage & Skifer AS | Administrative & support | 2023 |
| Handmade Event AS | Administrative & support | 2025 |
| Hansen Fjellsprengning AS | Construction | 2022 |
| Hardanger Chips AS | Transport & logistics | 1994 |
| Havbris Bygg Og Vedlikehold AS | Construction | 2022 |
| HBH Eiendom AS | Real estate | 2019 |
| He Butikk AS | Wholesale & retail | 2024 |