| Hvaler Tak & Membran AS | Construction | 2016 |
| Hvaler Utvikling AS | Real estate | 2024 |
| Hvaler VVS AS | Real estate | 2007 |
| Hvaler Øl AS | Real estate | 2017 |
| Hvalstrand Marina AS | Real estate | 2001 |
| Hvalungen Vann Og Avløp SA | Water & waste | 2009 |
| Hydrotopia Global Oceans AS | Professional & scientific | 2024 |
| Høiaasgruppen AS | Information & communication | 2026 |
| Ifore AS | Information & communication | 2024 |
| Ila Invest AS | Real estate | 2004 |
| Informasjonssenteret AS | Information & communication | 1994 |
| Jojo Eiendomsutvikling AS | Real estate | 2016 |
| Jro Holding AS | | 2025 |
| Juba Kiosk Ans | Wholesale & retail | 1992 |
| Julle Mu Vann Og Avløp SA | Water & waste | 2023 |
| Kajakklykke Da | Administrative & support | 2022 |
| Kajola AS | Construction | 2018 |
| Kalvehagen 1 AS | Real estate | 2020 |
| Karella AS | Agriculture & fishing | 2011 |
| Keag Holding AS | Health & social care | 2011 |
| KG Byggkonsult AS | Construction | 2013 |
| Knektemoen Helse AS | Health & social care | 2025 |
| Kolborg AS | Information & communication | 1973 |
| Kulturleveranser AS | Arts & recreation | 2013 |
| Kuvauen Kapital AS | | 2026 |
| Kystmiljø AS | Real estate | 1992 |
| Laenga Hyttegrend AS | Real estate | 1987 |
| Laenga Vann- Og Avløpslag SA | Water & waste | 2017 |
| Lars Egil Lande Mek Og Sveis AS | Manufacturing | 2015 |
| Larvesen Invest AS | Financial services | 2018 |
| Lederskapet AS | Administrative & support | 2020 |
| Leiko AS | Real estate | 1999 |
| Liefjellet Vann- Og Avløpslag SA | Water & waste | 2009 |
| Lille Special AS | Wholesale & retail | 2004 |
| Lillemy Invest AS | | 2022 |
| Lindbeck Invest AS | Financial services | 2015 |
| Line P Holding AS | | 2021 |
| Lineus Holding AS | Wholesale & retail | 2021 |
| LJ Maskin AS | Construction | 2018 |
| Lunch Huset Ans | Hospitality | 2002 |
| Lykkos Invest AS | | 2024 |
| Løkken Gård AS | Real estate | 2004 |
| Løkken Gård Hvaler AS | Agriculture & fishing | 2024 |
| M/S Maja AS | Agriculture & fishing | 1996 |
| Magne Kaspersen Holding AS | Agriculture & fishing | 2024 |
| Malstrøm Ans | Professional & scientific | 2003 |
| Maria Skarning AS | Other services | 2013 |
| Marin Two Invest AS | Transport & logistics | 2007 |
| Marine One Invest A/S | Transport & logistics | 2008 |
| Martin J. Holter AS | Administrative & support | 2008 |
| Mechanix Film AS | Information & communication | 2009 |
| Memek AS | Construction | 2023 |
| Midtre Holmetangen Vann Og Avløp SA | Construction | 2023 |
| Min AS | Arts & recreation | 2024 |
| Mina Milanda AS | Wholesale & retail | 1995 |
| Monoco AS | Information & communication | 2019 |
| Moss Atpp AS | Manufacturing | 2019 |
| MS Saga AS | Agriculture & fishing | 2023 |
| N.O.A.H Holding AS | | 2022 |
| Nesebakken AS | Real estate | 2016 |
| Nesebukta Brygge AS | Arts & recreation | 2022 |
| Never Ending Story AS | Information & communication | 2021 |
| Nordmar Båt Avd. Øst AS | Wholesale & retail | 2024 |
| Nordmar Øst Eiendom AS | Real estate | 2026 |
| Nordtug Eiendom Service AS | Administrative & support | 2020 |
| Norheim Transport Og Anlegg AS | Transport & logistics | 2019 |
| North Harbor AS | Professional & scientific | 2026 |
| Nye Adm Holding AS | | 2025 |
| Nyt Hvaler SA | Professional & scientific | 2025 |
| Opplev Solbakke AS | Administrative & support | 2022 |
| Opplæringskontor for Fiske Og Fangst Hvaler SA | Education | 2021 |
| Palm Tree Eiendom AS | Real estate | 2023 |
| Pan Holding AS | Construction | 2014 |
| Papper Utvikling AS | Real estate | 2022 |
| Peta Invest AS | Financial services | 2018 |
| Petter a Olsen AS | Construction | 2005 |
| Petter a Olsen Holding AS | Real estate | 2005 |
| Petter a Olsen Maskinutleie AS | Administrative & support | 2015 |
| Petter a Olsen Transport AS | Transport & logistics | 2007 |
| Phosri Thaimat AS | Hospitality | 2024 |
| Pirken Ans | Wholesale & retail | 1988 |
| Pra AS | Professional & scientific | 2021 |
| På Låven AS | Wholesale & retail | 2008 |
| Radical Fly Design AS | Professional & scientific | 2024 |
| Rega Holding AS | Real estate | 2005 |
| Resolutt AS | Professional & scientific | 2005 |
| Restaurant Havkatten AS | Wholesale & retail | 1995 |
| Retail Design Group Norway AS | Professional & scientific | 1998 |
| Rognli Bygg AS | Construction | 2017 |
| Rs-Invest AS | Construction | 2005 |
| Røa Vann- Og Avløpslag SA | Water & waste | 2017 |
| Rød Båthavnservice AS | Transport & logistics | 2017 |
| Rørleggermester Brødremoen AS | Construction | 2026 |
| Sagen Kolonial AS | Wholesale & retail | 2023 |
| Sand Bar Og Restaurant AS | Hospitality | 2019 |
| Sand Brygge AS | Real estate | 1991 |
| Saxegård Holding AS | Financial services | 2005 |
| Scandinavian Tug Service AS | Transport & logistics | 2013 |
| SG Reketrål AS | Agriculture & fishing | 2014 |
| Sjøbua Utgårdskilen AS | Real estate | 2020 |