| R & G Invest AS | Brumunddal | 2019 |
| R Daaland AS | Trondheim | 1980 |
| R Flekkefjord AS | Stavanger | 2008 |
| R Færch Plast AS | 7500 Holstebro | 1998 |
| R Olaussen Maskinering AS | Skien | 1979 |
| R Watts Engineering Ltd | Aberdeen Ab10 1Xb Scotland | 2020 |
| R&J Graphic HB | Se-24635 Löddeköpinge | 2019 |
| R&M Ship Interior AS | Molde | 2005 |
| R-M Holding AS | Orkanger | 2020 |
| R-Profil AS | Oslo | 2024 |
| R. Isaksen Holding AS | Skien | 2005 |
| R. Knutsen Service AS | Kviby | 2016 |
| R. O. Holding AS | Grimstad | 2013 |
| R. Scheuchl GmbH | De-94496 Ortenburg | 2025 |
| R. Skretting AS | Varhaug | 2011 |
| R. Solberg Holding AS | Ski | 2011 |
| R. Stahl Norge AS | Stavanger | 2007 |
| R. Stahl Tranberg AS | Stavanger | 2004 |
| R. Tvedt Invest AS | Kleppestø | 2005 |
| R.A. Service & Vedlikehold AS | Borgenhaugen | 2020 |
| R.G Mekaniske AS | Homborsund | 2023 |
| R.J. Marin & Transport AS | Veavågen | 2017 |
| R.K-Service AS | Fjell | 2026 |
| R.O Multiservice AS | Sørreisa | 2023 |
| R.S Stål AS | Brekstad | 2017 |
| R11 Automation SP. Z.O.O. Nuf | Pl-40-246 Katowice | 2023 |
| R4ILING AS | Nyborg | 2023 |
| Ra Kvalitet Svets AB | Oslo | 2010 |
| Ra Turf Lighting Solutions AS | Stavanger | 1990 |
| Raa Brewing Company AS | Råde | 2018 |
| Raabakk Holding AS | Fredrikstad | 2013 |
| Raabakk Manufacturing AS | Fredrikstad | 2013 |
| Raaen Sider AS | Grimo | 2022 |
| Raaum Og Fjære AS | Tranby | 2005 |
| Raavaren Slakteri AS | Bangsund | 2026 |
| Rab Industri AS | Porsgrunn | 2025 |
| Rabalder Sideri AS | Skartveit | 2025 |
| Rabaldus Da | Tromsø | 2011 |
| Rabben Mekaniske AS | Dolmøy | 2025 |
| Rabbes Holding | Nesoddtangen | 2011 |
| Rac Invest AS | Skoppum | 2015 |
| Racell Saphire | Dk-2620 Albertslund | 2018 |
| Radia Mekaniske AS | Oslo | 1993 |
| Radiatorservice AS | Stavanger | 2025 |
| Radiatorservice Oslo AS | Sofiemyr | 1996 |
| Radiatorservice Trondheim AS | Trondheim | 1996 |
| Radiocompaniet AS | Fetsund | 1984 |
| Radionor Communications AS | Trondheim | 2000 |
| Radisens Diagnostics Limited | Ballincollig P31 Hf29 | 2017 |
| Radom Service AS | Kautokeino | 1989 |
| Radøy Holding AS | Sæbøvågen | 2017 |
| Radøy Steinindustri Ans | Manger | 1995 |
| Radøygruppen AS | Sæbøvågen | 1993 |
| Rafael Dybvik AS | Fiskarstrand | 2016 |
| Rafdal Våpen Da | Etne | 2006 |
| Raffles New Power AS | Oslo | 2022 |
| Raffles Shipping Projects AS | Oslo | 2019 |
| Rafmek AS | Lommedalen | 2017 |
| Rafnar Mundal | Sæbøvågen | 2003 |
| Ragasco AS | Raufoss | 1997 |
| Ragnars AS | Kragerø | 2009 |
| Ragnhilds Hjemmebakeri Jakobsen AS | Stjørdal | 2021 |
| Ragnvaldjord Holding AS | Kopervik | 2015 |
| Raidna AS | Kautokeino | 2022 |
| Railway Robotics AS | Ås | 2019 |
| Railway Robotics Services AS | Ås | 2021 |
| Rainbow Gin AS | Oslo | 2017 |
| Rakkestad Slangeservice AS | Rakkestad | 2015 |
| Rakvåg Glass AS | Molde | 2002 |
| Rakvåg Invest AS | Molde | 2005 |
| Ralle AS | Skien | 1988 |
| Ram Sveis Og Bemanning AS | Søgne | 2024 |
| Ramme Service Bergen AS | Bergen | 2013 |
| Rammeboden AS | Sandnes | 2022 |
| Rammegalleriet Elise Selj AS | Oslo | 2016 |
| Rammehjørnet AS | Sandnes | 2024 |
| Rammehuset L. a. Pedersen AS | Bryne | 2005 |
| Rammemesteren Sandefjord AS | Sandefjord | 2017 |
| Rammer 1-2-3 AS | Oslo | 2015 |
| Rammeriet AS | Haslum | 1990 |
| Rammeservice Sandvold Haugerud Ans | Snertingdal | 1984 |
| Rammeverket AS | Oslo | 2011 |
| Rammeverkstedet AS | Bergen | 2022 |
| Rammsalt AS | Vettre | 2014 |
| Ramp Brygg AS | Vihals | 2017 |
| Ramsjø AS | Rolvsøy | 2023 |
| Ramstadbaker AS | Skien | 2024 |
| Ramstadløkka 3 AS | Mysen | 2023 |
| Rana Mek AS | Mo I Rana | 2009 |
| Rana Rebruk AS | Mo I Rana | 2025 |
| Rana Tannteknikk AS | Mo I Rana | 1976 |
| Rana Tig Og Multi Service AS | Mo I Rana | 2025 |
| Ranahytta AS | Mo I Rana | 2020 |
| Randaberg Coating AS | Randaberg | 1998 |
| Randaberg Group AS | Randaberg | 2017 |
| Randaberg Hjemmebakeri Og Konditori Ans | Randaberg | 1974 |
| Randaberg Industries AS | Randaberg | 1987 |
| Randaberg Trykk AS | Randaberg | 1992 |
| Randen Teknikk AS | Egersund | 2019 |
| Randesund Båtsenter AS | Kristiansand S | 2020 |