| Renaissance Parfums Limited | Wholesale & retail | 2023 |
| Renew Drycleaners PVT Ltd | Other services | 2021 |
| Reng Capital Limited | Financial services | 2017 |
| Reni Cleaning Limited | Administrative & support | 2019 |
| Renjas Hope Ltd | Health & social care | 2010 |
| Reno Handlings Limited | Real estate | 2021 |
| Reno-Mate Holdings Ltd | Real estate | 2023 |
| Rent Logger Ltd | Professional & scientific | 2026 |
| Rent Plan Limited | Real estate | 2025 |
| Rentbuddy Limited | Real estate | 2021 |
| Repimg RTM Company Limited | Households | 2025 |
| Reru Healthcare Ltd | Health & social care | 2022 |
| RES Consult Ltd | Professional & scientific | 2021 |
| Research Plus Ltd | Professional & scientific | 2008 |
| Reseda Holdings UK Limited | Financial services | 2023 |
| Reseda Lifesciences Ltd. | Wholesale & retail | 2021 |
| Reset Living Ltd | Hospitality | 2021 |
| Reset Medical Aesthetic Clinic Ltd | Health & social care | 2023 |
| Reshape Finance Limited | Professional & scientific | 2024 |
| Reshay Estates Ltd | Real estate | 2020 |
| Residential Rents Group Ltd | Real estate | 2025 |
| Residents of 34 Bromley Grove Limited | Administrative & support | 2001 |
| Resilient Mothers Ltd | Education | 2025 |
| Resital Ltd | Extraterritorial | 2023 |
| Resolvd Ltd | Information & communication | 2025 |
| Resonosys Ltd | Professional & scientific | 2014 |
| Respawn Entertainment Ltd | Information & communication | 2026 |
| Restore Reflexology Limited | Other services | 2022 |
| Retail & Asset Solutions Group Ltd | Administrative & support | 2022 |
| Retail & Asset Solutions Ltd | Administrative & support | 2018 |
| Retail Property Management and Consultancy Ltd | Wholesale & retail | 2022 |
| Retail Wallet Ltd | Professional & scientific | 2015 |
| Retailology Limited | Professional & scientific | 2024 |
| Retrac Limited | Professional & scientific | 2012 |
| Retreat Beauty Clinic Ltd | Other services | 2026 |
| Retreat Yoga Ltd | Arts & recreation | 2020 |
| Return on Advertising Spend Limited | Professional & scientific | 2019 |
| Revive Hydration Ltd | Wholesale & retail | 2023 |
| Revive Your Rental Limited | Administrative & support | 2022 |
| Revolutions Media Limited | Arts & recreation | 2021 |
| Rewire Insights Ltd | Professional & scientific | 2025 |
| Reworking Ltd | Professional & scientific | 2023 |
| Rewthink Limited | Manufacturing | 2014 |
| Rexha Solutions Ltd | Construction | 2023 |
| REY Enterprises Limited | Real estate | 2016 |
| RG Habitat Limited | Real estate | 2025 |
| Rg&Rg Patel & Sons Limited | Real estate | 2015 |
| RGA Retail Ltd | Wholesale & retail | 2025 |
| RGL Construction Ltd | Construction | 2017 |
| Rhana Properties Ltd | Real estate | 2024 |
| RHD Yachting Ltd | Extraterritorial | 2024 |
| Rhentech IT Services Limited | Information & communication | 2021 |
| Rhodium Creative Ltd | Professional & scientific | 2020 |
| Rhodium Digital Technologies Ltd | Information & communication | 2026 |
| Rhonda Thom Consultancy Ltd | Health & social care | 2023 |
| RHP Heating and Plumbing Ltd | Construction | 2023 |
| RHT Trading Limited | Wholesale & retail | 2021 |
| Rhule's Engineering Ltd | Wholesale & retail | 2024 |
| RI Brickwork and Construction Limited | Construction | 2019 |
| Ria.Adekunle Healthcare Ltd | Health & social care | 2022 |
| Riamay Limited | Wholesale & retail | 2020 |
| Ribbans Consulting Limited | Professional & scientific | 2023 |
| Ribbon Counselling & Psychotherapy Ltd | Other services | 2019 |
| Rich & Lucky Limited | Construction | 2013 |
| Rich Brother Accountants Ltd. | Professional & scientific | 2013 |
| Rich Financial Consulting Ltd | Professional & scientific | 2022 |
| Rich Stirling Ltd | Arts & recreation | 2020 |
| Richaccurate Accountants Ltd | Professional & scientific | 2018 |
| Richard Hills Consulting Limited | Professional & scientific | 2019 |
| Richard R. Thomas Limited | Financial services | 2003 |
| RICHARD99 Ltd | Construction | 2019 |
| Richardsonlee Ltd | Construction | 2024 |
| Richbandit Ltd | Wholesale & retail | 2019 |
| Richfield Court (Beckenham) Management Company Limited | Real estate | 1989 |
| Richmond Aviation Ltd | Professional & scientific | 2025 |
| Richstone Renovations Ltd | Construction | 2024 |
| Rick Baker Limited | Manufacturing | 2006 |
| Riddle Court RTM Company Limited | Households | 2024 |
| Rideswap Ltd | Information & communication | 2016 |
| Ridley Estates | Real estate | 1946 |
| RIG Locums Limited | Administrative & support | 2011 |
| RIG Medical Recruit Limited | Administrative & support | 2002 |
| Riggindale RTM Company Ltd | Households | 2013 |
| Right Decision Ltd | Extraterritorial | 2025 |
| Rigo Shipping Limited | Transport & logistics | 2020 |
| RIM Drinks Ltd | Manufacturing | 2025 |
| Rimartz Limited | Information & communication | 2017 |
| Rinahli Consulting Limited | Financial services | 2011 |
| Ringers Court Residents Association Limited | Real estate | 1994 |
| Ripley Arts Centre Limited | Arts & recreation | 2021 |
| Rise 'N' Shine After School Club Limited | Education | 2012 |
| Rise 2 Recruit Ltd | Administrative & support | 2024 |
| Rise Search and Talent Consulting Ltd | Administrative & support | 2013 |
| Riser Ltd | Information & communication | 2011 |
| Risho Games Ltd | Information & communication | 2025 |
| Risk Business Advisory & Consulting Ltd | Real estate | 2015 |
| Risk Capital Advisors Limited | Financial services | 2011 |
| Riso Cleaning Company Ltd | Administrative & support | 2023 |
| Rita's Bakehouse Ltd | Hospitality | 2024 |
| RIV Express Limited | Transport & logistics | 2023 |