| Revitalise Solutions Limited | Information & communication | 2013 |
| Revive Plus Ltd. | Health & social care | 2017 |
| Revola Estate Ltd | Real estate | 2022 |
| Revolution Roof Boxes Ltd | Wholesale & retail | 2023 |
| Revolve Management Systems Ltd | Professional & scientific | 2010 |
| Revolvify Limited | Wholesale & retail | 2024 |
| Revvlab Ltd | Wholesale & retail | 2025 |
| REX Walters Property Management Ltd | Real estate | 2025 |
| RF GAS and Heating Services Limited | Construction | 2025 |
| Rfoodkhan Ltd | Hospitality | 2025 |
| RG Carpentry & Joinery Ltd | Information & communication | 2019 |
| RG Construct Ltd | Construction | 2024 |
| RG Masette Limited | Wholesale & retail | 2020 |
| RGB Residential Limited | Real estate | 2025 |
| Rgcm UK Altar CIC | Other services | 2026 |
| RGH GAS Limited | Construction | 2015 |
| RGR Estates Limited | Real estate | 2025 |
| Rgsh Consulting Ltd | Information & communication | 2018 |
| RGZ Ltd | Professional & scientific | 2018 |
| RH TEK Limited | Administrative & support | 2024 |
| Rhinog Limited | Administrative & support | 2018 |
| Rhoda Construction Ltd | Professional & scientific | 2016 |
| Riaz Group Limited | Real estate | 2022 |
| Riaz Property Group Limited | Real estate | 2025 |
| Riccitbarber Ltd | Administrative & support | 2017 |
| Rice N Curry Limited | Hospitality | 2016 |
| Rice Rebel Limited | Hospitality | 2024 |
| Richard AXE Developments Ltd | Construction | 2025 |
| Richard Barcock Limited | Construction | 2021 |
| Richard Biffa (Reclamation) Limited | Extraterritorial | 1968 |
| Richard Church Associates Limited | Professional & scientific | 2012 |
| Richard Churches Ltd | Professional & scientific | 2026 |
| Richard Mullins Dental Laboratory Limited | Health & social care | 2008 |
| Ricketts Plumbing & Heating Limited | Construction | 2009 |
| Ride on! Entertainment (UK) Limited | Administrative & support | 2001 |
| Rider Property Services (HW) Limited | Administrative & support | 2011 |
| Ridgeline Print Ltd | Manufacturing | 2026 |
| Ridgepoint Homes (Marley Lane) Limited | Construction | 2020 |
| Ridgepoint Homes Limited | Construction | 2006 |
| Ridgeway Biologicals Limited | Professional & scientific | 2003 |
| Rifiuti Ltd | Professional & scientific | 2024 |
| Right Heads Ltd | Administrative & support | 2024 |
| Right Signs (High Wycombe) Ltd | Professional & scientific | 2023 |
| Rightcall Construction Ltd | Construction | 2024 |
| RIJ Consulting Limited | Information & communication | 2021 |
| RIK Orts-Hansen Design Limited | Professional & scientific | 2011 |
| Rimm Transport Ltd | Transport & logistics | 2026 |
| RIN Infinite Solutions Limited | Information & communication | 2024 |
| RIO Accounting Services Ltd | Professional & scientific | 2022 |
| Ripley Developments Ltd | Construction | 2016 |
| Ripple Trading Ltd | Wholesale & retail | 2023 |
| Ripslix Limited | Information & communication | 2010 |
| Rise and Dine Limited | Hospitality | 2024 |
| Rishi Property Management Limited | Real estate | 2022 |
| Rishlanka PVT Ltd | Wholesale & retail | 2024 |
| Risk Management Security Services Ltd | Administrative & support | 2010 |
| Risk Management Services (Chiltern) Limited | Administrative & support | 1981 |
| Risk Management Services (Holdings) Ltd | Real estate | 1993 |
| Risk Promotions Limited | Professional & scientific | 2003 |
| Risq Solutions Ltd | Construction | 2026 |
| River Court Residents (High Wycombe) Limited | Households | 1988 |
| River Farm Developments Limited | Extraterritorial | 1963 |
| Riverdell Services Ltd | Construction | 2023 |
| Riverside Equities Limited | Real estate | 2021 |
| Riverside Gardens Residents Association Limited | Households | 1997 |
| Riverston Repertoire Ltd | Other services | 2017 |
| Rivotek Ltd | Wholesale & retail | 2025 |
| Riya Construction Limited | Construction | 2014 |
| Riya Glass & Glazing Ltd | Manufacturing | 2021 |
| Rize Protection Limited | Manufacturing | 2025 |
| RJ Fashions Limited | Wholesale & retail | 2020 |
| RJB Electrical Solutions Ltd | Construction | 2023 |
| RJB Invest IQ Limited | Construction | 2024 |
| RJB Partners Limited | Professional & scientific | 2008 |
| Rjct Investments Ltd | Real estate | 2023 |
| RJG Group Ltd | Professional & scientific | 2020 |
| Rjgp Ltd | Real estate | 2026 |
| RJM Property Management & Technical Limited | Real estate | 2015 |
| RJR Autos Ltd | Wholesale & retail | 2019 |
| RK Contractors Ltd | Construction | 2020 |
| Rkdh Limited | Real estate | 2025 |
| RKH Properties Limited | Real estate | 2018 |
| RKH Services Ltd | Administrative & support | 2021 |
| Rknt Consultancy Ltd | Professional & scientific | 2025 |
| RKOUK01 Ltd | Wholesale & retail | 2016 |
| RLD Productions Ltd | Professional & scientific | 2024 |
| RLP Contracting Ltd | Other services | 2018 |
| RM Contracting Services Ltd | Information & communication | 2015 |
| Rmaa Clinical Supplies Limited | Wholesale & retail | 2023 |
| RMN Property Maintenance Ltd | Manufacturing | 2026 |
| RMR Accommodations Ltd | Hospitality | 2023 |
| RMR Group Ltd | Financial services | 2023 |
| RMS Solutions Ltd | Professional & scientific | 2024 |
| RN Canine Services Ltd | Other services | 2025 |
| RNE Solutions Limited | Energy | 2012 |
| RNG Homes Ltd | Real estate | 2023 |
| RNV Properties Ltd | Real estate | 2018 |
| RO Accountancy Limited | Professional & scientific | 2022 |
| Road Brushes Ltd | Manufacturing | 2020 |
| Road Runner Recovery Ltd | Wholesale & retail | 2025 |