| Prosjekt Håndverk AS | Construction | 1995 |
| Prosjektbygg AS | Real estate | 2005 |
| Prosjektpilotene AS | | 2009 |
| Protec AS | Construction | 2022 |
| Protech Norge AS | Information & communication | 2006 |
| Protek Norge AS | Wholesale & retail | 2011 |
| Proton Norway AS | Information & communication | 2023 |
| Protrade AS | Wholesale & retail | 2003 |
| PS Press AS | Information & communication | 1991 |
| Ps-Con Ltd Nuf | Professional & scientific | 2011 |
| Psykolog Katrin Hovden Lemjan AS | Health & social care | 2013 |
| Pulsdietten AS | Wholesale & retail | 1990 |
| Punchline Studio AS | Information & communication | 2018 |
| Pura Glass AS | Wholesale & retail | 2020 |
| Push PR AS | Professional & scientific | 2022 |
| På Høyda Midt I Moss AS | Professional & scientific | 2018 |
| På Ramme Alvor AS | Manufacturing | 2017 |
| Pål Hesstvedt AS | Health & social care | 1993 |
| Pål Stenersrød Bygg Og Tømrerfirma AS | Construction | 2012 |
| Pål Øystein Carlsen AS | Financial services | 2011 |
| Quality Yachts Scandinavia Da | Wholesale & retail | 1998 |
| Queens Pub AS | Hospitality | 2004 |
| Quipd AS | Manufacturing | 1992 |
| R3 Utvikling AS | Real estate | 2018 |
| Raaneland AS | | 2024 |
| Rabekk Bil USA Ford Parts AS | Other services | 2000 |
| Rabekkporten AS | Real estate | 2021 |
| Rafimeta Norge AS | Wholesale & retail | 2021 |
| Ragnar AS | | 2023 |
| Ragnarok AS | Financial services | 2008 |
| Rainmakers Innovation AS | Information & communication | 2017 |
| Rakkestad Invest AS | Real estate | 2021 |
| Rakkestad Torg AS | Construction | 2012 |
| Ramos Frisør AS | Other services | 2026 |
| Rangur Madur AS | Hospitality | 2017 |
| Rase Investments AS | | 2024 |
| Rasjonell Elektro AS | Construction | 2004 |
| Rasjonell VVS AS | Construction | 2019 |
| Raufoss Butikkeiendom AS | Real estate | 2020 |
| Raymarine Norge AS | Professional & scientific | 2005 |
| Rbo Invest AS | Real estate | 2017 |
| Re Inspire AS | | 2018 |
| Rebik AS | Professional & scientific | 2019 |
| Recharge AS | Energy | 2019 |
| Reel in Motion AS | Information & communication | 2003 |
| Refsnes Barnehage SA | Education | 2002 |
| Refsnes Fritidshus SA | Real estate | 1975 |
| Refsnes Garasjelag I SA | Real estate | 2000 |
| Refsnes Garasjelag II SA | Real estate | 2002 |
| Regnskapsførern AS | Professional & scientific | 2006 |
| Regnskapssentralen AS | Professional & scientific | 2025 |
| Reier Gård Ans | Agriculture & fishing | 2003 |
| Reima Norway AS | Wholesale & retail | 2016 |
| Reinbakk Bredesen Cont Ans | Wholesale & retail | 1998 |
| Reinvent AS | | 2023 |
| Rekyl Shipping AS | Real estate | 2005 |
| Remon Eiendom AS | Real estate | 2019 |
| Renaissance Oil & Gas B.V. | Professional & scientific | 2009 |
| Reneflot Ans | Agriculture & fishing | 2011 |
| Reniu AS | Wholesale & retail | 2015 |
| Renolit Kiosk AS | Wholesale & retail | 2007 |
| Renty AS | Real estate | 2024 |
| Renvar AS | Wholesale & retail | 2021 |
| Rep-Tech AS | Manufacturing | 1996 |
| Resolveit AS | | 2024 |
| Restaurant Cage Ans | Hospitality | 2001 |
| Restaurant Ro Drift AS | Hospitality | 2018 |
| Restauranthuset Holtheløkka AS | Real estate | 2021 |
| Retrofit AS | Education | 2019 |
| Rgmt Eiendom AS | Real estate | 2006 |
| Rigfinder AS | Professional & scientific | 2022 |
| Riis Marine AS | Professional & scientific | 2008 |
| Riktig HMS AS | Health & social care | 2019 |
| Ringnes Invest AS | | 2026 |
| Ringstad Transport AS | Transport & logistics | 2003 |
| Risiko Respons AS | Administrative & support | 2015 |
| Ritorno AS | | 2020 |
| Riviera Hotelldrift AS | Hospitality | 2018 |
| RM Bilpleie Og Bilvask AS | Other services | 2014 |
| Robert Johanssons Byggnadsfirma | Construction | 2002 |
| Robert Søvik Living Quarters AS | Professional & scientific | 2026 |
| Rock & Fotball AS | Education | 2020 |
| Rocket T AS | Professional & scientific | 2018 |
| Roger Hansen Drift AS | Wholesale & retail | 1993 |
| Roine Holding AS | Information & communication | 2023 |
| Rolf Groth Invest AS | Financial services | 2005 |
| Romstad Klimateknikk AS | Construction | 2025 |
| Rondan AS | Hospitality | 2015 |
| Roomtorent AS | Real estate | 2019 |
| Rosello AS | Hospitality | 2020 |
| Roshill AS | | 2023 |
| Royal Thai Massasje AS | Health & social care | 2015 |
| Rozentrisk AS | Wholesale & retail | 2025 |
| RS Bilmegling AS | Wholesale & retail | 2013 |
| RS Forskaling AS | Construction | 2016 |
| Rsc-Elc Holding AS | Real estate | 2011 |
| Rudite Blindheim AS | Other services | 2023 |
| Rune Eden AS | Wholesale & retail | 1997 |
| Rune Hegstad AS | Professional & scientific | 2014 |
| Rune Torseth AS | Health & social care | 2005 |