| Reiki Surrey Limited | Health & social care | 2023 |
| REJ Services Ltd | Professional & scientific | 2019 |
| Reliance Heating Ltd | Construction | 2021 |
| Rellium Ltd | Construction | 2010 |
| Relmm Ltd | Real estate | 2026 |
| Remedi Finance Limited | Financial services | 2024 |
| Remida Limited | Administrative & support | 2024 |
| Remora Services Ltd | Real estate | 2009 |
| Remy Lyse Consultancy Ltd | Professional & scientific | 2025 |
| Renal Digital Health Ltd. | Manufacturing | 2025 |
| Renas L Limited | Hospitality | 2018 |
| Renatus Property Management Limited | Real estate | 2011 |
| Renovar Homes Ltd | Real estate | 2021 |
| Renovatio Limited | Extraterritorial | 2022 |
| RENOWN-12 Ltd | Real estate | 2026 |
| Repreadyai Ltd | Information & communication | 2026 |
| Repro Software Ltd | Information & communication | 2025 |
| Repsuite Limited | Administrative & support | 1990 |
| Reputable Electrical Ltd | Construction | 2020 |
| Rescue Mums Companion Care Ltd | Health & social care | 2023 |
| Rescue Mums Limited | Administrative & support | 2019 |
| Resolute Claims Partnership Limited | Administrative & support | 2011 |
| Resolution Connect Ltd | Professional & scientific | 2026 |
| Responsible Data Services Limited | Information & communication | 2024 |
| Responsive Consultants Limited | Health & social care | 2017 |
| Restbay Geoscience Ltd | Mining & quarrying | 2025 |
| Rested Vitamins Ltd | Professional & scientific | 2026 |
| Restless Ferret Ltd | Information & communication | 2018 |
| Results Management Services (GB) Limited | Financial services | 1995 |
| Results Management Services Limited | Wholesale & retail | 1992 |
| Retail Point Services Limited | Wholesale & retail | 1994 |
| Retro Build Ltd | Construction | 2022 |
| Retro Underfloor Heating Limited | Construction | 2020 |
| Return Well Limited | Health & social care | 2026 |
| Reucob Limited | Construction | 2007 |
| Reval Solutions Ltd | Professional & scientific | 2019 |
| Revelstoke Road Management Company Limited | Households | 2002 |
| Revered Capital Ltd | Information & communication | 2025 |
| Revjuvenate Ltd | Wholesale & retail | 2018 |
| Revleap Limited | Other services | 2025 |
| Reymar Limited | Information & communication | 2026 |
| RH19 Ltd | Wholesale & retail | 2014 |
| Rhona Properties Ltd | Real estate | 2023 |
| Rhyk Property Ltd | Real estate | 2021 |
| Rial Risk Services Ltd | Financial services | 2019 |
| Rich PAL Ltd | Transport & logistics | 2023 |
| Richard Gough Limited | Wholesale & retail | 2007 |
| Richard Sale Limited | Information & communication | 2010 |
| Richardson Nova Limited | Professional & scientific | 2025 |
| Riches Wealth Ltd | Financial services | 2016 |
| Richmond Investment Group Ltd | Transport & logistics | 2024 |
| Richmond Partners Limited | Administrative & support | 2009 |
| Richmond Pictures Ltd | Administrative & support | 2015 |
| Richmond Road Management Limited | Households | 1974 |
| Richson Realty Ltd | Real estate | 2025 |
| Rider Press Limited | Manufacturing | 1981 |
| Ridgeway (Oxshott) Management Limited(The) | Real estate | 1987 |
| Riding Technology Services Ltd | Other services | 2020 |
| Ridrx Limited | Transport & logistics | 2022 |
| Righ Capital Ltd | Real estate | 2012 |
| Right Vision Investment Limited | Real estate | 2020 |
| Rina's Cleaning Services Limited | Administrative & support | 2024 |
| RIO Grill Limited | Hospitality | 2024 |
| Riposte Pictures Limited | Information & communication | 2008 |
| Ripplearch Ltd | Information & communication | 2017 |
| Rise Limited | Professional & scientific | 1992 |
| Riser Systems Limited | Information & communication | 2026 |
| Ristorante Amalfi Ltd | Hospitality | 2023 |
| Rita DON Pilates Ltd | Arts & recreation | 2024 |
| Ritecote IEA Limited | Construction | 2015 |
| Ritmo Sports Ltd | Manufacturing | 2018 |
| Rivendell Associates Limited | Professional & scientific | 2013 |
| River ABS Ltd | Professional & scientific | 2016 |
| River Road Management (1992) Limited | Real estate | 1992 |
| Riverdene Court (Management) Limited | Households | 1976 |
| Rivermead House (Sunbury-On-Thames) Management Company Limited | Households | 1973 |
| Rivermoon Consultancy Limited | Professional & scientific | 2008 |
| Riverside Court Management Company Limited | Households | 1973 |
| Riverstone Therapy CIC | Health & social care | 2026 |
| Riverview Business & Consultancy Limited | Real estate | 2019 |
| Riverview Road House Ltd | Households | 2019 |
| Riviera Property Services Ltd | Construction | 2024 |
| Riwayat Ltd | Arts & recreation | 2011 |
| Rixm Limited | Information & communication | 2019 |
| Riyad Paradise Estates Ltd. | Real estate | 2025 |
| RJ47 Holdings Ltd | Financial services | 2024 |
| RJW Consulting Ltd | Construction | 2019 |
| Rjwcontrols Ltd | Professional & scientific | 2018 |
| RK Ceiling Ltd | Construction | 2011 |
| RK Controls Ltd | Administrative & support | 2019 |
| RKH Design Ltd | Information & communication | 2006 |
| RKT Project Limited | Information & communication | 2013 |
| RL Payroll Services Ltd | Administrative & support | 2025 |
| Rlth Services Limited | Professional & scientific | 2023 |
| RMC Consultants Limited | Professional & scientific | 2017 |
| RMD Building Ltd | Construction | 2023 |
| Rmdo Ltd | Health & social care | 2017 |
| RMH Builders Limited | Construction | 2009 |
| RN Holding LLP | | 2025 |
| RN Homes UK Ltd | Construction | 2021 |