| RH Inv. AS | Sandnes | 2012 |
| RH Kvalitetsbygg AS | Fåberg | 2020 |
| RH Landbruksservice Da | Bokn | 2015 |
| RH Malerservice AS | Gressvik | 2025 |
| RH Vedlikehold AS | Evenskjer | 2015 |
| RH VVS AS | Hønefoss | 2026 |
| Rh-Bygg AS | Staubø | 2018 |
| Rha 230389 AS | Bru | 2023 |
| Rheinmetall Electronics GmbH | Duken | 2005 |
| RHG Entreprenør & Eiendom AS | Gjøvik | 2016 |
| RHG Holding AS | Larvik | 2024 |
| RHH Invest AS | Dokka | 2022 |
| Rhi Magnesita GmbH Nuf | At-1120 Vienna | 2018 |
| Rhino Bygg AS | Valderøya | 2024 |
| RHK Bygg AS | Meråker | 2018 |
| RHM Rørservice AS | Sandstad | 2026 |
| RHS Invest AS | Råholt | 2024 |
| RHS Maskin AS | Rørvik | 2024 |
| Rhta Måleri Nuf | S-125 50 Alvsjo | 2008 |
| Rhå Bygg-Holding AS | Roa | 2020 |
| Ri Total Bygg AS | Mogreina | 2023 |
| Ri.Al.Bygg AS | Ytre Arna | 2022 |
| Rial Holding AS | Fredrikstad | 2017 |
| Rian Blikk AS | Trondheim | 2024 |
| Rias Holding AS | Figgjo | 2018 |
| Rib Nor Anlegg AS | Kjøllefjord | 2023 |
| Ribe Entreprenør AS | Lillesand | 2023 |
| Ribes Elektro AS | Høvåg | 1998 |
| Ribi Eiendom AS | Aureosen | 2008 |
| Ricana Concept I Norge | Se-335 73 Hillerstorp | 2022 |
| Richard Andersen AS | Mosby | 2021 |
| Richard Andersen Elektro AS | Arendal | 1982 |
| Richard Strømme Holding AS | Kristiansand S | 2005 |
| Richard's Malerservice AS | Oslo | 2021 |
| Richardsen AS | Silsand | 2026 |
| Richardt Thomsen Aps | Oslo | 2013 |
| Richert Bygg AS | Sandnes | 2023 |
| Richter Laborkundendienst | De-23974 Neuburg | 2017 |
| Rickard Moberg Bygg Trading AB Nuf | Se-13025 Ingmarsö, Stockholms Län | 2026 |
| Riddervold Holding AS | Røros | 2021 |
| Ridson Sp.Z.O.O | 71-750 Szczecin | 2016 |
| Riebensahm GmbH | De-64625 Bensheim | 2007 |
| Riform AS | Sandnes | 2015 |
| Rig Og Drilling Service AS | Hjelmeland | 2025 |
| Rigedalen 45D AS | Kristiansand S | 2006 |
| Rigetjønnveien 2 AS | Kristiansand S | 2018 |
| RIGFIT7SEAS Limited Nuf | Inverness Iv2 5Na | 2020 |
| Rigg & Logistikk AS | Verdal | 2015 |
| Rigg Tech Ltd | Manchester M35 0Ga England | 2023 |
| Riggmann AS | Oslo | 2019 |
| Riggområde Stange Af Ans | Furnes | 2025 |
| Riggpartneren AS | Kristiansand S | 2019 |
| Riggtech Entreprenad AB Nuf | Se-827 35 Ljusdal | 2018 |
| Right Bygg Og Vaktmestertjenester AS | Rolvsøy | 2023 |
| Rigtek Nord AS | Trofors | 2012 |
| Riiber Drift Og Vedlikehold AS | Hamarvik | 2024 |
| Riik AS | Bjørnevatn | 2021 |
| Riis Bygg Trøndelag AS | Trondheim | 2023 |
| Riis Construction GmbH | D-24937 Flensburg | 2013 |
| Riis Eiendom AS | Trondheim | 1985 |
| Riis Elektro AS | Halden | 1993 |
| Riis Glass Og Fasade AS | Tiller | 1994 |
| Riis-Smaadal Rørleggerbedrift SA | Nannestad | 2022 |
| Riise & Paulsen Eiendom AS | Odda | 2017 |
| Rika Holdingselskap AS | Lillehammer | 2012 |
| Rikelektro AS | Halden | 2007 |
| Riko Bobner Pearl | Pl-81-061 Gdynia | 2020 |
| Riko Entreprenør AS | Mjøndalen | 2026 |
| Riksbygg AS | Selje | 2014 |
| Riksvold AS | Verdal | 2006 |
| Rikter Bygg AS | Oslo | 2015 |
| Riktig Byggservice AS | Hansnes | 2021 |
| Riktig Stein AS | Oslo | 2019 |
| Rilus AS | Bodø | 2022 |
| Rimas Holding AS | Mo I Rana | 2021 |
| Rimkus AS | Sør-Fron | 2014 |
| Rimstad VVS AS | Larvik | 2018 |
| Rind Handverk AS | Bjørnevatn | 2011 |
| Rindal Maskin AS | Rindal | 1990 |
| Rindal Mur Og Betong AS | Rindalsskogen | 2018 |
| Rindals-Tre AS | Rindal | 2001 |
| Rinde Anlegg AS | Leikanger | 2012 |
| Rindhølen Fjellsprenging AS | Vågå | 2021 |
| Ring & Fiks AS | Oslo | 2023 |
| Ring 91107440 AS | Søgne | 2012 |
| Ring Blikk & Kobberslageri Ans | Krokkleiva | 1989 |
| Ring Bygg Og Maler Entreprenør AS | Hønefoss | 2019 |
| Ring Elektroservice AS | Øyer | 2020 |
| Ring Forskaling AS | Hønefoss | 2021 |
| Ring Olav AS | Sandefjord | 2024 |
| Ringbolig Hønefoss AS | Hønefoss | 2014 |
| Ringebu Anleggsdrift AS | Ringebu | 2003 |
| Ringebu Graveservice AS | Ringebu | 1993 |
| Ringebu Maskin AS | Sør-Fron | 2007 |
| Ringebu Rørleggerservice AS | Ringebu | 2020 |
| Ringen Rørservice AS | Oslo | 2018 |
| Ringen Skogsdrift AS | Kolbu | 2018 |
| Ringerike & Hadeland Betongsaging AS | Jevnaker | 2014 |
| Ringerike Anleggsservice AS | Hønefoss | 1998 |
| Ringerike B&T Holding AS | Hønefoss | 2025 |