| Acp Holding AS | Wholesale & retail | 2005 |
| Acp Kongshavn AS | Real estate | 2014 |
| Aduana AS | Hospitality | 2025 |
| Aktiv Rørpartner AS | Construction | 2005 |
| Alu Og Glass System AS. | Wholesale & retail | 2020 |
| Anne Lauvstad Holding AS | | 2025 |
| Apotekergaarden 1775 AS | Real estate | 2019 |
| Arch Eiendom AS | Real estate | 2009 |
| Bamble Ambulanse AS | Real estate | 1995 |
| Bambleveien 119 AS | Real estate | 2021 |
| Barfod Gårdsdrift Ans | Real estate | 2009 |
| Bergsland Entreprenør AS | Construction | 2019 |
| Big Kahuna Holding AS | Wholesale & retail | 2017 |
| Bislet Video AS | Information & communication | 2023 |
| Bjønnes Charter Rederi AS | Transport & logistics | 1998 |
| Bjønnes Invest & Eiendom AS | Real estate | 2000 |
| Bobben Gatekjøkken Og Pizzeria AS | Hospitality | 2018 |
| Bobben Spiseri Og Vinbar AS | Hospitality | 2022 |
| Bobbens Invest AS | Hospitality | 2021 |
| BR. Nilsen Byggmesterfirma AS | Construction | 2021 |
| BR. Nilsen Eiendom AS | Real estate | 2018 |
| Bryggakiosken AS | Wholesale & retail | 2014 |
| Bryggekanten Kafe Og Bistro Langesund AS | Hospitality | 2023 |
| Butikkdrift Langesund AS | Wholesale & retail | 2015 |
| Byggmester Ellingsen AS | Construction | 2019 |
| Børres Invest AS | Real estate | 2020 |
| Calma Holding AS | Professional & scientific | 2022 |
| Canem AS | Information & communication | 2020 |
| Carls Lille Snekkeri AS | Construction | 2020 |
| Cathwell AS | Wholesale & retail | 2003 |
| Cave Holding AS | Information & communication | 2020 |
| Cito Holding AS | Real estate | 2005 |
| Clara Transport AS | Transport & logistics | 2023 |
| Clarks Gate 5 AS | Real estate | 2019 |
| Complete Partner Grenland AS | Administrative & support | 2009 |
| Dekk & Service Da | Wholesale & retail | 2007 |
| Dr.Ing Knut Wiik AS | Professional & scientific | 2017 |
| Ee-Eiendom AS | Real estate | 2015 |
| Eiendomselskapet Wrightegaarden AS | Real estate | 1992 |
| Eik-Eiendom AS | Real estate | 2021 |
| Eik-Holding AS | Real estate | 2020 |
| Eikelunden Invest AS | | 2020 |
| Elko Laft AS | Construction | 2012 |
| Emisys Holding AS | | 2024 |
| Engelstad Marine AS | Education | 2019 |
| Espen Ommundsen AS | | 2022 |
| Extreme Work AS | Wholesale & retail | 2004 |
| Fareid Holding AS | Real estate | 2016 |
| Fareid Tecnology AS | Professional & scientific | 2017 |
| Fasadevask, Grenland AS | Administrative & support | 2024 |
| Fikkjebakke Eiendom AS | Real estate | 2016 |
| Findal & Findal Holding AS | Professional & scientific | 2005 |
| Firestarter AS | Information & communication | 2023 |
| Firma Uslugowa Marcin Szalbot | Construction | 2006 |
| Flex Langesund AS | Arts & recreation | 2023 |
| Frier Project Solutions AS | Professional & scientific | 2026 |
| Frode a. V Holding AS | | 2026 |
| Fundel AS | Information & communication | 2022 |
| Gardo Invest AS | Financial services | 2005 |
| Glittum Consulting AS | Professional & scientific | 2005 |
| Good Time AS | Arts & recreation | 2009 |
| Grasmyrhallen AS | Real estate | 2025 |
| Grenland Betong Og Sanering AS | Construction | 2022 |
| Grenland Førstehjelpundervisning Da | Education | 2001 |
| Gym Service AS | Other services | 2026 |
| H.O.M.E. Hjelp AS | Administrative & support | 2023 |
| H.O.M.E. Holding AS | Administrative & support | 2023 |
| Haki 2 Holding AS | | 2023 |
| Harald Lyngberg AS | Information & communication | 2008 |
| Hegge AS | Real estate | 2006 |
| Helgestad Invest AS | | 2024 |
| Helleberg Holding AS | Wholesale & retail | 2006 |
| Helsepasset AS | Health & social care | 2014 |
| HMS Olsen AS | | 2020 |
| Hogstad VVS AS | Construction | 2025 |
| Hpyfoot AS | Professional & scientific | 2018 |
| HQ Invest AS | Professional & scientific | 2012 |
| Idea Engineering AS | Professional & scientific | 2012 |
| Idea Solutions AS | Professional & scientific | 2014 |
| Impro X AS | Professional & scientific | 1999 |
| Instalatorstwo Sanitarne Co I Gaz Krzysztof Nowak | Construction | 2006 |
| Jb-Invest Da | | 2022 |
| Jfe Holding AS | | 2022 |
| JGS Retail AS | Professional & scientific | 2014 |
| Job Kapital AS | | 2021 |
| Jobet AS | | 2023 |
| John Bråthen Invest AS | Financial services | 2005 |
| Jonar AS | Professional & scientific | 2019 |
| Jowill Holding AS | | 2023 |
| JP Aasen AS | Financial services | 2017 |
| JR Prosjekt AS | Professional & scientific | 2017 |
| K. Nordengen Holding AS | | 2020 |
| K. Wæhle Avenir AS | Real estate | 1998 |
| Karaldenuten Holding AS | | 2024 |
| Knut Halfdan Svendsen AS | Health & social care | 2017 |
| Kongsgaarden Instrument AS | Manufacturing | 2005 |
| Krabberødveien 6 AS | Real estate | 1994 |
| Krogshavn Holding AS | Wholesale & retail | 2005 |
| Lager 167 AS | Real estate | 2025 |
| Lager 168 AS | Real estate | 2025 |