| Rica Holdings Ltd | Real estate | 2024 |
| Rice Construction Services Limited | Construction | 2015 |
| Richard Burnell Ltd | Professional & scientific | 2021 |
| Richard Cassidy Limited | Wholesale & retail | 2005 |
| Richard Hardy Construction Limited | Construction | 2004 |
| Richard Kiely Limited | Professional & scientific | 2017 |
| Richard Martin Design Limited | Professional & scientific | 2019 |
| Richard Plumb Creative Ltd | Professional & scientific | 2020 |
| Richmond Gate Mortgages Limited | Financial services | 2007 |
| Rickard & Lunn Limited | Professional & scientific | 2013 |
| Ricketts Earthworks Limited | Construction | 2026 |
| Ricksan Homes Ltd | Construction | 2020 |
| Ricky Bhandal Ltd | Health & social care | 2016 |
| Ricla Ltd | Real estate | 2021 |
| Riell Homes Ltd | Real estate | 2024 |
| Right Addition Recruitment Ltd | Professional & scientific | 2026 |
| Right Click Network Limited | Information & communication | 2016 |
| Right Door Solutions Ltd | Construction | 2015 |
| Right Drylining Ltd | Construction | 2018 |
| Rightbiz Ltd | Information & communication | 2010 |
| Rightway UP Limited | Information & communication | 1990 |
| Rika Global Ltd | Professional & scientific | 2019 |
| Rim-Technic Ltd | Wholesale & retail | 2024 |
| Ringway House Developments Ltd | Construction | 2017 |
| Ringway House Management Ltd | Households | 2019 |
| Rio's Piri Piri Healthy Ltd | Hospitality | 2024 |
| Rionis Pizza Limited | Wholesale & retail | 2024 |
| Ripachu Ltd | Wholesale & retail | 2025 |
| Riseboon Limited | Professional & scientific | 1982 |
| Riseup Online Limited | Education | 2025 |
| Risi Flooring Ltd | Construction | 2026 |
| Rising Spirit Ltd | Wholesale & retail | 2024 |
| Risio Limited | Professional & scientific | 2020 |
| Rita's Developments & Lettings Limited | Real estate | 2024 |
| Rivendell and Lighthouse Limited | Real estate | 2017 |
| Riverside Development Northampton Ltd | Construction | 2018 |
| Riverside Machinery Holdings Ltd | Wholesale & retail | 2021 |
| Riverside Northampton Holdings Limited | Financial services | 2019 |
| Rivici Limited | Wholesale & retail | 2019 |
| Riviera Lets Ltd | Real estate | 2025 |
| RJ Energy Consultants Ltd | Other services | 2019 |
| RJ Legal Limited | Professional & scientific | 2013 |
| Rj's Ultimate Properties Ltd | Real estate | 2024 |
| Rjcj Financial Limited | Financial services | 2017 |
| Rjcj Investments Limited | Real estate | 2021 |
| Rjcj LLP | | 2024 |
| RJM Accountants Limited | Professional & scientific | 2010 |
| Rjms Properties Limited | Real estate | 2019 |
| RJO Consultancy Limited | Professional & scientific | 2015 |
| RJR Group Holdings Ltd | Information & communication | 2026 |
| RJW Electrical Limited | Construction | 2014 |
| RK Takeaway Services Ltd | Hospitality | 2023 |
| RKK Property Ltd | Real estate | 2017 |
| RLC Properties Ltd | Hospitality | 2021 |
| Rllw Properties Ltd | Real estate | 2025 |
| RLW Training Limited | Professional & scientific | 2009 |
| RM Holdings (Mids) Limited | Financial services | 2024 |
| Rmcomms FBA LP | | 2023 |
| RMN Limited | Administrative & support | 2007 |
| RMT Ventures Private Limited | Real estate | 2018 |
| RNG Medical Ltd | Health & social care | 2020 |
| RNG Property Ltd | Real estate | 2019 |
| RNJ Properties Limited | Real estate | 2020 |
| RNK Real Estate Ltd | Real estate | 2024 |
| Roamtrip Ltd | Information & communication | 2024 |
| Roar Grills Ltd | Manufacturing | 2018 |
| ROB Butler Studio Ltd | Professional & scientific | 2019 |
| Robb & Co Limited | Professional & scientific | 1995 |
| Robemanor Limited | Extraterritorial | 2009 |
| Robert Bracher Renovations Ltd | Construction | 2024 |
| Robert Nicholls Funeral Directors Limited | Extraterritorial | 2009 |
| Roberts & Brain Limited | Extraterritorial | 1946 |
| Robson Mason Property Limited | Professional & scientific | 2018 |
| Rocennil Developments Limited | Construction | 1964 |
| Roche Construction Services Ltd | Professional & scientific | 2025 |
| Rockfine Group Limited | Professional & scientific | 2016 |
| Rocktop Properties Limited | Real estate | 2017 |
| ROE Consultancy Ltd | Professional & scientific | 2024 |
| Rohan Goswami Ltd | Health & social care | 2025 |
| Roji Consultant Ltd | Hospitality | 2024 |
| Rokcorp Solutions Limited | Information & communication | 2006 |
| Rokibo Limited | Real estate | 2014 |
| Rokitu Limited | Construction | 2019 |
| Rolfe Property Investments Ltd | Real estate | 2020 |
| Rollers Roller Discos & Skating Ltd | Arts & recreation | 2024 |
| Roman D&B Limited | Construction | 2026 |
| Roman Gardens (Streetly) Management Limited | Households | 2007 |
| Romantina Estate Ltd | Real estate | 2025 |
| Romney Marsh Funeral Services Limited | Extraterritorial | 1982 |
| Ronsorola Limited | Households | 2023 |
| Roof a Tech UK Limited | Construction | 2024 |
| Room 61 LLP | | 2010 |
| Roomico Ltd | Real estate | 2025 |
| Root of David Enterprises Ltd | Transport & logistics | 2022 |
| Roots and Rhythm Ltd | Other services | 2024 |
| Ropework Limited | Professional & scientific | 1988 |
| Rose Bay Furniture Limited | Wholesale & retail | 2004 |
| Rose Desserts Ltd | Manufacturing | 2020 |
| Rose John Construction Ltd | Construction | 2025 |
| Rose Psychotherapy Ltd | Health & social care | 2025 |