| Royal Subsea AS | Kopervik | 2020 |
| Royal Travel AS | Oslo | 1998 |
| Royale Nordic AS | Kløfta | 2022 |
| Royaltjenester AS | Drammen | 2023 |
| Royazain Ltd | Windsor Sl4 4Bq England | 2023 |
| Roykon | Dk-7000 Fredericia | 2020 |
| Roza Vision AS | Langhus | 2025 |
| Roåker Utmarkslag SA | Tretten | 1995 |
| RP Personell AS | Mosjøen | 2019 |
| RP Teknikk AS | Skien | 2021 |
| Rpov - Renholdspartner Oslo Og Viken AS | Borgenhaugen | 2022 |
| RR Eiendomsservice AS | Nesttun | 2024 |
| RR I Norr AB | Se-945 92 Altersbruk | 2024 |
| Rr-G Holding AS | Geithus | 2018 |
| RRB AS | Tau | 2010 |
| Rrsig Record 16 Ltd Nuf | N146Qh, London, Southgate | 2008 |
| Rrsig Validator 61 Ltd Nuf | London Southgate N14 6Qh England | 2025 |
| RS Autoservice AS | Leinstrand | 2006 |
| RS Experience AS | Risør | 2021 |
| RS Holdingselskap AS | Horten | 2004 |
| RS Jobb AS | Løvenstad | 2019 |
| RS Panel Service AS | Kolbu | 2023 |
| RS Platou AS | Oslo | 2013 |
| RS Shero AS | Oslo | 2026 |
| RS Sikkerhet AS | Blomsterdalen | 2012 |
| RS Stillas & Rigg AS | Sauda | 2016 |
| Rs-Agenturer AS | Bjerkvik | 2012 |
| Rsa Bilutleie AS | Drammen | 1974 |
| Rse AS | Ålesund | 2024 |
| RSG Invest AS | Son | 2005 |
| RSG Maskinteknikk AS | Våler I Østfold | 2018 |
| Rsi Tunnelpersonal GmbH | Asker | 2014 |
| Rsst AS | Hønefoss | 2022 |
| Rssw Limited Nuf | Cf24 5Ea Cardiff | 2026 |
| RSV AS | Fredrikstad | 2012 |
| RSV Gruppen AS | Nyborg | 2000 |
| RT Entreprenørservice AS | Risør | 2017 |
| RT Sea Limited | Bridge Of Altan Stirling Fk9 Av | 2019 |
| RT Utleie Service 2 AS | Grimstad | 2026 |
| RTB Maskinutleie AS | Raufoss | 2025 |
| Rtbc Rigg Og Renhold AS | Fjell | 2015 |
| RTC Consultancy AS | Skien | 2017 |
| RTC Maintenance AS | Skien | 2026 |
| RTC Offshore AS | Skien | 2013 |
| RTC Renewables AS | Skien | 2023 |
| Rti Sea AS | Leksvik | 2020 |
| Rti Tjenester AS | Hakkstabben | 2019 |
| Rtiq AS | Tromsø | 2018 |
| Rtjen Invest AS | Arendal | 2017 |
| Rttm Holding AS | Snarøya | 2021 |
| Ruben Solheim AS | Florø | 2017 |
| Rubicon Oilfield International UK Ltd | Gb - Ab12 3Sn Aberdeen | 2012 |
| Ruby Rejser Aps | Dk-8000 Aarhus C | 2020 |
| Ruden Nordic Well Logging Services AS | Engelsviken | 2021 |
| Rudsflata 3 AS | Rudshøgda | 2010 |
| Ruge&Klekke AS | Oslo | 2015 |
| Rulle AS | Nannestad | 2023 |
| Rumex Ekonomiupplysning KB | Oslo | 2006 |
| Rumin Invest AS | Verdal | 2010 |
| Rumo Invest AS | Solbergelva | 2020 |
| Run Romsdal Ans | Isfjorden | 2019 |
| Runar AS | Hokksund | 2005 |
| Rundballelaget AS | Guddal | 2024 |
| Rundereim Brygge AS | Selje | 2025 |
| Rundt Bordet AS | Oslo | 2022 |
| Rundtom AS | Stabekk | 2024 |
| Rune Dahl AS | Kvam | 2017 |
| Rune Enstad AS | Brekstad | 2024 |
| Rune Helleland Holding AS | Kleppe | 2005 |
| Rune Holthe Holding AS | Skotselv | 2013 |
| Rune Midtkandal Maritim Konsulent Ans | Eidsnes | 1993 |
| Rungu AS | Tennevoll | 2020 |
| Runnok Holding AS | Hommersåk | 1999 |
| Runster AS | Sandnes | 2024 |
| Runway Rock Fest AS | Hosle | 2026 |
| Runway-Norway AS | Bergen | 2017 |
| Ruraence Limited | Middlesborough Ts7 0Bs England | 2024 |
| Russebuss AS | Ytre Arna | 2020 |
| Russebusservice.No AS | Oppaker | 2009 |
| Russell Publishing Limited | Tn16 1Nu Kent | 2014 |
| Russell Reynolds Associates AS | Oslo | 2011 |
| Russelyd AS | Porsgrunn | 2021 |
| Russland Eventyr Da | Vågå | 2006 |
| Russmo AS | Lakselv | 2022 |
| Rusta Vrak Bilutleige Nuf | Vassenden | 2013 |
| Rustad Gård AS | Gjerdrum | 2012 |
| Rutter Transport AS | Bjørkelangen | 2020 |
| Ruttos Network (Norway) Limited | London Ec1V 2Nx England | 2024 |
| Ruud AS | Fagerstrand | 2021 |
| Ruud Smooth AS | Snarøya | 2021 |
| RV Bobil AS | Lørenskog | 2021 |
| RV Invest AS | Mongstad | 2009 |
| RV Maskin AS | Sola | 2019 |
| RV Service AS | Mongstad | 2007 |
| Rvbuilding & Recruitment Oü Nuf | Ee-11415 Tallinn | 2025 |
| RVS Eiendomsdrift AS | Moss | 1994 |
| RW Drift AS | Arneberg | 2022 |
| RW3 II AS | Gardermoen | 2025 |
| RW3 Invest AS | Vollen | 2023 |
| RWR Probuild Group | 81-831 Sopot | 2016 |