| Ringerike Bad Og Bygg AS | Sokna | 2017 |
| Ringerike Blikk Og Tak AS | Hønefoss | 2025 |
| Ringerike Drift Og Mat AS | Hønefoss | 2018 |
| Ringerike Elektro AS | Hønefoss | 2018 |
| Ringerike Kjøle & Fryseservice AS | Hønefoss | 2014 |
| Ringerike Landskap AS | Røyse | 2020 |
| Ringerike Oppussing AS | Hallingby | 2021 |
| Ringerike VVS AS | Hønefoss | 2024 |
| Ringerikshus AS | Hønefoss | 2006 |
| Ringerud Drift AS | Hønefoss | 1992 |
| Ringhagen Bygg & Service AS | Saudasjøen | 2023 |
| Ringheim & Ure Byggmeisterfirma Ans | Voss | 1989 |
| Ringhus Skifer-Mur Og Flis AS | Rauland | 2015 |
| Ringi KFT. | Hu-1071 Budapest | 2011 |
| Ringjord Elektro AS | Kvaløya | 2020 |
| Ringli Bygg AS | Rogne | 2020 |
| Ringsaker Blikk Og Ventilasjon AS | Brumunddal | 1990 |
| Ringsaker Bygg AS | Moelv | 2002 |
| Ringsaker Elektro AS | Moelv | 2013 |
| Ringsaker Håndlaft Da | Rudshøgda | 1997 |
| Ringsakfjellet Drift AS | Sjusjøen | 2007 |
| Ringshaug Oppussing Kowalski AS | Tolvsrød | 2018 |
| Ringside AS | Oslo | 1970 |
| Ringstad Bygg AS | Årnes | 2001 |
| Ringtunveien 9 Eiendom AS | Grålum | 2014 |
| Ringvold Invest AS | Aurdal | 2009 |
| Ringvoll VVS Og Varmepumpeteknisk AS | Dilling | 2011 |
| Ringø Bygg | Slemmestad | 1999 |
| Rinheat OY | 02150 Espoo | 2011 |
| Rino Borgersen AS | Solbergelva | 1987 |
| Rino Bråthen Graving Og Transport AS | Halden | 2014 |
| Rino Bråthen Graving Og Transport Da | Halden | 1992 |
| Rinor AS | Mo I Rana | 2023 |
| Rints AS | Brandval | 2018 |
| Ripel Bygg AS | Krokstadelva | 2014 |
| Riple Maskin AS | Nesttun | 2024 |
| Ripo Fabrika | Oslo | 2013 |
| Ripo Fabrika AS | Oslo | 2014 |
| Ripu AS | Hønefoss | 2016 |
| Risa AS | Nærbø | 1998 |
| Risanger & Sønn AS | Haugesund | 2000 |
| Risbergsæter Og Beitnes Ans | Arneberg | 1994 |
| Risdal AS | Skåbu | 2014 |
| Risdal Service AS | Fyresdal | 2017 |
| Rise Byggelag Ans | Hareid | 1987 |
| Riseberg Dykkertjeneste AS | Eidsberg | 2023 |
| Riset Flisdesign AS | Melhus | 2024 |
| Rismer | Ee-61406 Tartu Linn | 2018 |
| Risnes Elektro AS | Sæbøvågen | 1981 |
| Risnes Rør AS | Bergen | 2022 |
| Rispeleitet SA | Hauglandshella | 2014 |
| Rist Aslaksen Holding AS | Skoppum | 2022 |
| Rist Maskin AS | Leinesfjord | 2011 |
| Ristic Electronic AS | Oslo | 2018 |
| Risum Service AS | Halden | 2015 |
| Risør Byggservice AS | Færvik | 2018 |
| Risør Eiendom AS | Risør | 2011 |
| Risør Heis Og Elektroservice AS | Risør | 2009 |
| Risør Rør AS | Risør | 2006 |
| Risøy Bygg AS | Ågotnes | 2005 |
| Ritbet Useugi Remontowo- Budowlane Janiszewski Rafal | Kristiansand S | 2015 |
| Riv Og Bygg AS | Oslo | 2013 |
| Riv Og Røsk AS | Skedsmokorset | 2022 |
| Rivas Bygg AS | Sjetnemarka | 2024 |
| Rive Robert/Rcd Invest AS | Frekhaug | 2014 |
| Rive- Og Knuseservice AS | Tveit | 1998 |
| Rivendellis | Kristiansund N | 2008 |
| Rivetjenester AS | Hernes | 2015 |
| Rivi AS | Sandnes | 2014 |
| Riviere AS | Nesttun | 2007 |
| Riving Og Sjauing AS | Torp | 2024 |
| Rivings Kompetanse AS | Holmsbu | 2015 |
| Rivingsspesialistene AS | Bodø | 2022 |
| Rivingsteknikk AS | Torp | 2014 |
| Rivit AS | Høvik | 2012 |
| Rivningsgruppen AS | Bøn | 2015 |
| Rivtema AS | Drøbak | 2024 |
| Riwo AS | Kleppestø | 2015 |
| Rix AS | Selje | 2020 |
| RJ Anlegg AS | Sarpsborg | 2021 |
| RJ Bygg AS | Åmot | 2024 |
| RJ Byggtjenester AS | Kløfta | 2021 |
| RJ Gruppen AS | Porsgrunn | 2024 |
| RJ Multiservice AS | Austrheim | 2022 |
| Rjo Holding AS | Rypefjord | 2023 |
| Rjt-Service AS | Hosteland | 2016 |
| Rjukan Mur & Flis AS | Rjukan | 2015 |
| Rjukan VVS & Elektro AS | Rjukan | 2000 |
| RK & Crue AS | Vennesla | 2020 |
| RK Bygg AS | Naustdal | 2007 |
| RK Bygg Oslo AS | Oslo | 2020 |
| RK Elektro AS | Rissa | 2024 |
| RK Heistad Bolig AS | Porsgrunn | 2022 |
| RK Invest AS | Vassenden | 2012 |
| RK Maskin & Transport AS | Storsteinnes | 2018 |
| RK Maskin AS | Førde | 2008 |
| RK Montasje Og Services AS | Lørenskog | 2026 |
| RK Montering & Eiendomsservice AS | Trondheim | 2015 |
| RK Mur AS | Sande I Vestfold | 2011 |
| RK Mur Og Flis AS | Storsteinnes | 2016 |