| PST AS | Professional & scientific | 2004 |
| Psykisk Helse AS | Health & social care | 2026 |
| PV Arkitekter AS | Professional & scientific | 1993 |
| PVC Import AS | Wholesale & retail | 2016 |
| Pyramiden Legekontor AS | Health & social care | 2000 |
| Pyramiden Tannlegekontor AS | Health & social care | 2007 |
| Pro Anno A/S | Information & communication | 1988 |
| På Lager AS | Real estate | 2017 |
| På Sporet AS | Hospitality | 2019 |
| Pøbo Eiendom Holding AS | Real estate | 2019 |
| QB Rørservice AS | Construction | 2021 |
| Qbator AS | | 2003 |
| Qonnectech AS | Information & communication | 2022 |
| R Sætre Sykepleierklinikken AS | Wholesale & retail | 2024 |
| R.A Dreng Invest AS | | 2020 |
| R.T.M. Invest AS | Real estate | 2019 |
| R2 Holding AS | Real estate | 2017 |
| Raastad Holding AS | Wholesale & retail | 2022 |
| Race Holding AS | Construction | 2005 |
| Rakke Multimedia AS | Professional & scientific | 2011 |
| Rakkeveien Bolig AS | Real estate | 2005 |
| Rammo AS | Transport & logistics | 2022 |
| Ramstad Med AS | Health & social care | 2026 |
| Rask 202601 AS | | 2026 |
| Rask 202602 AS | | 2026 |
| Rask 202603 AS | | 2026 |
| Rask 202604 AS | | 2026 |
| Rask 202605 AS | | 2026 |
| Raskt-Levert AS | Transport & logistics | 2003 |
| Rastad Holding AS | Information & communication | 2021 |
| Rauan Eiendom AS | Real estate | 2001 |
| Rauan Invest AS | Real estate | 2005 |
| Rauan Jern Mek Verksted Ans | Manufacturing | 2002 |
| Raus Design Studio AS | Professional & scientific | 2024 |
| RB Industritjenester AS | Wholesale & retail | 2014 |
| Rb-Bygg AS | Construction | 2021 |
| RDL AS | Hospitality | 2020 |
| Re-El AS | Wholesale & retail | 2022 |
| Realbygg Larvik AS | Construction | 2015 |
| Reality AS | | 2020 |
| Realt Bygg & Anlegg AS | Construction | 2023 |
| Realt Bygg & Anlegg Holding AS | Construction | 2023 |
| Recycls AS | Financial services | 2019 |
| Redcap AS | Real estate | 2022 |
| Reed Holding AS | | 2020 |
| Reen AS | Wholesale & retail | 2019 |
| Regal Kjeks Og Kakefabrikk AS | Manufacturing | 1961 |
| Regeneri AS | Other services | 2023 |
| Regnskapsfirmaet Roy Ramm AS | Professional & scientific | 1989 |
| Regorknaus AS | | 2022 |
| Reguline AS | Health & social care | 1998 |
| Reia AS | Financial services | 2008 |
| Reiers AS | | 2024 |
| Reipbanegata 10 Og 12 AS | Real estate | 2018 |
| Reis Anlegg AS | Construction | 2023 |
| Reis AS | Professional & scientific | 2023 |
| Reis Bygg AS | Construction | 2023 |
| Reis Elektro AS | Construction | 2019 |
| Reis Energi AS | Construction | 2024 |
| Reis FM AS | Administrative & support | 2025 |
| Reis Håndverk AS | Professional & scientific | 2025 |
| Reis Infra AS | | 2025 |
| Reis Næring H4 Og H6B Holding AS | Real estate | 2024 |
| Reis Næring N30 AS | Real estate | 2024 |
| Reis Næringseiendom AS | | 2025 |
| Reis Regnskap AS | Professional & scientific | 2023 |
| Reis Renhold AS | Administrative & support | 2025 |
| Reis VVS AS | Construction | 2020 |
| Reis Økonomi AS | | 2025 |
| Rekkevik Holding AS | Financial services | 2013 |
| Rekkevikhågan 18 AS | Real estate | 2022 |
| Remi Eiendom AS | Real estate | 2025 |
| Ren Tann AS | Health & social care | 2012 |
| Renat Holding AS | Real estate | 2012 |
| Renee AS | Education | 2025 |
| Renewgen AS | Wholesale & retail | 2013 |
| Renovera Bygg Og Håndverk AS | Construction | 2019 |
| Rensa AS | Administrative & support | 2023 |
| Renti Renhold AS | Administrative & support | 2026 |
| Resonner AS | Information & communication | 2014 |
| Respons-Media AS | Wholesale & retail | 2007 |
| Restart Larvik AS | Education | 2023 |
| Restaurant Attraa AS | Information & communication | 2022 |
| Restaurant Kalvefjøset Ans | Hospitality | 1996 |
| Restaurant Vadskjæret AS | Hospitality | 2021 |
| Restauranthuset Eiendom AS | Real estate | 2023 |
| Restauranthuset Holding AS | Hospitality | 2023 |
| Resultatfokus AS | Administrative & support | 2006 |
| Rettshjelp for Brukere Av Nav AS | Professional & scientific | 2019 |
| Rettvvs AS | Construction | 2026 |
| Reused Design AS | Real estate | 2024 |
| Revet Holding AS | Real estate | 2017 |
| Revisjonsfirmaet Schumacher & Hammer AS | Professional & scientific | 2005 |
| Rewest Holding AS | | 2024 |
| Rexius AS | Real estate | 2025 |
| RG Fjellsikring AS | Construction | 2020 |
| RHG Holding AS | Construction | 2024 |
| Rib Works AS | Manufacturing | 2011 |
| Rich. Thjømøe AS | Wholesale & retail | 2005 |
| Richard Holding AS | Real estate | 2006 |