| Razar Family Partnership LLP | | 2018 |
| RBN Retail Ltd | Wholesale & retail | 2025 |
| Rbre Investments Limited | Financial services | 2014 |
| Rbutler Healthcare & Pharma Services Ltd | Wholesale & retail | 2018 |
| Rcnl Properties Ltd | Real estate | 2020 |
| Rcnl Properties Partnership LLP | | 2020 |
| RDA and L Services Limited | Public administration | 2020 |
| RDS Driving Services Limited | Education | 2010 |
| Real Properties Holding Ltd | Financial services | 2020 |
| Real Properties Partnership LLP | | 2019 |
| Real Properties South Ltd | Real estate | 2019 |
| Realm London Ltd | Real estate | 2013 |
| Red 4 Investments Limited | Real estate | 2019 |
| Red Driving School Limited | Education | 2010 |
| Red DRM Limited | Education | 2011 |
| Red Instructor Training Limited | Professional & scientific | 2011 |
| Redmond Family Partnership LLP | | 2023 |
| Reel Construction Limited | Construction | 2022 |
| Reform Strength and Conditioning Ltd | Arts & recreation | 2022 |
| Refurb NE Limited | Construction | 2022 |
| Regional Training Partners Limited | Education | 2007 |
| Remarkable Ventures (LT) Ltd | Real estate | 2024 |
| Renova Nexus Limited | Administrative & support | 2025 |
| Repairwise Limited | Other services | 2022 |
| Requisite Consultancy Services Ltd | Professional & scientific | 2016 |
| Resida Property Services Limited | Real estate | 2007 |
| Residential Group LLP | | 2020 |
| Reva Capital Ltd | Professional & scientific | 2012 |
| Rexille Services Limited | Manufacturing | 2016 |
| Reynard Transport Limited | Transport & logistics | 2015 |
| RFT Compliance Support Ltd | Professional & scientific | 2022 |
| RFW NE Ltd | Wholesale & retail | 2026 |
| RG Advisory Services Limited | Professional & scientific | 2025 |
| RG International Ltd | Professional & scientific | 2026 |
| Rgsr Ltd | Construction | 2025 |
| Rheumacare Ltd | Health & social care | 2022 |
| Rhodes DE Beers Property Company Ltd | Real estate | 2021 |
| Rhodes DE Beers Property Partnership LLP | | 2021 |
| Richardson Safety Consultancy Limited | Professional & scientific | 2013 |
| Richon Properties LLP | | 2010 |
| Riddington Cook Family Partnership LLP | | 2023 |
| Riddington Cook Limited | Administrative & support | 2016 |
| Right Rent 4 YOU LLP | | 2019 |
| Rikama PAY Limited | Administrative & support | 2019 |
| Riley FOX Company Limited | Construction | 2020 |
| Rise Consulting Ltd | Professional & scientific | 2025 |
| Risk Audit and Control Ltd | Professional & scientific | 2025 |
| Ritzy Regal Ltd | Other services | 2023 |
| Riverside Resin Ltd | Construction | 2017 |
| Rizq City Private Limited | Administrative & support | 2023 |
| Rizzo-Singh Family Investments Ltd | Financial services | 2025 |
| RKM Homes Ltd | Real estate | 2021 |
| Rkrk LLP | | 2017 |
| Rksw Investments Limited | Real estate | 2020 |
| Rlsh Risk Management Ltd | Public administration | 2017 |
| RNG Smiles Limited | Health & social care | 2025 |
| RO Beauty Ltd | Other services | 2025 |
| Roar Consulting Ltd | Administrative & support | 2018 |
| Roar Property Partnership LLP | | 2021 |
| Roath Niwas Limited | Real estate | 2018 |
| ROB Midgley E&I Limited | Construction | 2015 |
| Rock Rental Ltd | Administrative & support | 2023 |
| Rockwill Homes Ltd | Construction | 2012 |
| Roding Lane Accommodation Ltd | Real estate | 2022 |
| Rogers Estates Partnership LLP | | 2020 |
| Roka Rentals UK LLP | | 2023 |
| Roofers Ltd | Construction | 2026 |
| Rooplal Family Holdings Limited | Real estate | 2019 |
| Rooplal Family Partnership LLP | | 2019 |
| Rose Property Partnership LLP | | 2020 |
| Roseberry Hill Farm & Country Ltd | Agriculture & fishing | 2022 |
| Roseberry Three Limited | Hospitality | 2025 |
| Rosewoodco Limited | Other services | 2014 |
| Rosewyke LLP | | 2021 |
| Ross Homes Holdings Ltd | Real estate | 2019 |
| Ross Homes Partnership LLP | | 2019 |
| Rossington Hall Investments Limited | Other services | 1990 |
| Rotary Building Services Ltd | Construction | 1979 |
| Rothman Property Holdings Ltd | Real estate | 2022 |
| Rothman Property LLP | | 2022 |
| Rotocombine Ltd | Professional & scientific | 2019 |
| Rotometry Ltd | Professional & scientific | 2011 |
| Roughton Holdings Limited | Real estate | 2022 |
| Roughton Holdings Partnership LLP | | 2022 |
| Roxbrows Limited | Professional & scientific | 2024 |
| Roxby Engineering International Limited | Professional & scientific | 1962 |
| Royce Services (Cleveland) Limited | | 1988 |
| RPG Property Ltd | Real estate | 2019 |
| RPL Commissioning Ltd | Construction | 2023 |
| RR Ortho Ltd | Health & social care | 2023 |
| RSI Bidco Limited | Professional & scientific | 2023 |
| RSP Commercial & Residential Ltd | Real estate | 2024 |
| Rspd Property Limited | Real estate | 2024 |
| RTC Catering Ltd | Hospitality | 2024 |
| RTR Resources Limited | Other services | 2019 |
| Rtsy Homes LLP | | 2021 |
| Ruby Friday Limited | Wholesale & retail | 2019 |
| Rudby Estates Limited | Hospitality | 2012 |
| Rudd Planning Services Ltd | Professional & scientific | 2023 |
| Ruiz Limited | Construction | 2023 |