| RJP Property Solutions Ltd | Real estate | 2024 |
| RJR Contracts Ltd | Construction | 2017 |
| RJR Solutions 24 Limited | Construction | 2024 |
| RJR Solutions Limited | Information & communication | 2023 |
| RK Asset Holdings Ltd | Real estate | 2025 |
| RK Freehold Ltd | Real estate | 2025 |
| RK Investors Ltd | Real estate | 2016 |
| RK Legal Services Ltd. | Professional & scientific | 2018 |
| RK Logistics Solution Ltd | Transport & logistics | 2025 |
| RK Spin Properties Ltd | Real estate | 2025 |
| RKB Solutions International Ltd | Manufacturing | 2026 |
| Rket Limited | Information & communication | 2016 |
| RKH Agencies Limited | Administrative & support | 2005 |
| Rkrareservices Limited | Health & social care | 2022 |
| Rktj Developments Ltd | Real estate | 2020 |
| Rktj Properties Ltd | Construction | 2024 |
| RLC Developments Limited | Construction | 2024 |
| Rlectrical Ltd | Construction | 2026 |
| RM & CT Transport Services Ltd | Wholesale & retail | 2020 |
| RM & SON Express Ltd | Construction | 2024 |
| RM Carz Limited | Wholesale & retail | 2026 |
| RM GAS Solutions Limited | Construction | 2016 |
| RM General Buildings Limited | Construction | 2018 |
| RM Holdings (Europe) Limited | Administrative & support | 2010 |
| RM Homes Limited | Real estate | 2023 |
| RM Property Management Ltd | Real estate | 2022 |
| RM Surgical Ltd | Health & social care | 2016 |
| Rmar Construction Ltd | Construction | 2025 |
| RMD Global Development Limited | Construction | 2024 |
| RMD Global Holdings Limited | Professional & scientific | 2017 |
| RMD Global Investments Ltd | Real estate | 2021 |
| RMD Global Marketing Limited | Wholesale & retail | 2018 |
| RMD Global OYB Limited | Wholesale & retail | 2018 |
| RMD Global Software Ltd | Information & communication | 2026 |
| RMD Global Wholesale Limited | Wholesale & retail | 2017 |
| Rmfc Limited | Financial services | 2015 |
| RMG Contracts Ltd | Construction | 2023 |
| RMI Finance Ltd | Financial services | 2011 |
| RMJ Commercial Properties Ltd | Real estate | 2022 |
| RML Network Limited | Wholesale & retail | 2022 |
| Rmla Property Limited | Real estate | 2025 |
| Rmnl Investments Ltd | Real estate | 2016 |
| RMW Investments Ltd | Financial services | 2019 |
| RMZ Consultancy Limited | Health & social care | 2025 |
| Rmzs Holding Limited | Professional & scientific | 2026 |
| RN Carpenter Ltd | Construction | 2025 |
| RN Fastview Construction Ltd | Construction | 2024 |
| RN Travel Ltd | Transport & logistics | 2023 |
| RNK Developments Ltd | Construction | 2017 |
| RNK London Limited | Wholesale & retail | 2022 |
| RNK Properties Limited | Real estate | 2025 |
| RO Dumi Ltd | Transport & logistics | 2020 |
| Road Haul Ltd | Transport & logistics | 2019 |
| Road Haulage Association Limited | Other services | 1944 |
| Road to Rail (Waste Management) Limited | Extraterritorial | 1998 |
| Road Train Transport (UK) Ltd | Transport & logistics | 2026 |
| Road Transport Solutions Ltd | Transport & logistics | 2019 |
| Roast & Brew Ltd | Wholesale & retail | 2025 |
| ROB Jackson Consulting Limited | Administrative & support | 2011 |
| Rob's Coffee Ltd | Hospitality | 2025 |
| Robellion Limited | Financial services | 1998 |
| Robert Brothers Famous Circus Limited | Extraterritorial | 2012 |
| Robert Darcie Ltd | Administrative & support | 2023 |
| Robert Ding Independent Agronomy Ltd | Agriculture & fishing | 2003 |
| Robert Eric Ltd | Transport & logistics | 2025 |
| Robert Haulage Ltd | Transport & logistics | 2020 |
| Robertica Ltd | Construction | 2020 |
| Roberts Build Group Limited | Construction | 2023 |
| Robin and Renovations Ltd | Construction | 2020 |
| Robin Clarke Limited | Real estate | 2014 |
| Robin Miller Consultants Limited | Professional & scientific | 2005 |
| Robin Road Limited | Transport & logistics | 1998 |
| Robin Security Services Limited | Administrative & support | 2024 |
| Robinski Ltd | Transport & logistics | 2019 |
| Robinson Consultants Ltd | Professional & scientific | 2012 |
| Robinson Property Management Limited | Real estate | 2015 |
| Robinsons Car Sales UK Limited | Wholesale & retail | 2018 |
| Robinsons Garage (UK) Limited | Wholesale & retail | 2013 |
| Robinsons of Stilton Limited | Manufacturing | 1960 |
| Robowerkz Ltd | Information & communication | 2023 |
| Robson & Co Couriers Ltd. | Transport & logistics | 2011 |
| Robsonik Limited | Transport & logistics | 2020 |
| Robyson's Limited | Wholesale & retail | 2015 |
| Robyson's Transport Limited | Transport & logistics | 2016 |
| Rochford Management Solutions Limited | Extraterritorial | 2014 |
| Rock and Roll Enterprises Ltd | Extraterritorial | 2018 |
| Rock Business Solutions Ltd | Professional & scientific | 2023 |
| Rock Fact Ltd | Wholesale & retail | 2025 |
| Rock House Development (Stamford) Limited | Construction | 2022 |
| Rocket Brands Ltd | Wholesale & retail | 2025 |
| Rockingham Alternative Education Ltd | Education | 2024 |
| Rockingham Editorial Ltd | Other services | 2021 |
| Rockingham Educational Services Holdings Ltd | Financial services | 2023 |
| Rockingham Educational Services Ltd | Education | 2022 |
| Rockingham Fender Seats Limited | Manufacturing | 2011 |
| Rocklobster Publishing Limited | Information & communication | 1993 |
| Rockwell Music Ltd | Information & communication | 2013 |
| Rockyan Limited | Wholesale & retail | 2026 |
| Rodaisy Ltd | Transport & logistics | 2025 |
| ROE Bros. & Co Ltd. | Manufacturing | 1981 |