| Ride Wave Ltd | Transport & logistics | 2026 |
| Rider's 1ST Choice Ltd | Manufacturing | 2021 |
| Ridgetech Global Trading Limited | Construction | 2012 |
| Ridhwaan Investments Ltd | Extraterritorial | 2024 |
| Ridings Coffee House Ltd | Hospitality | 2023 |
| Riffa Rose Ltd | Wholesale & retail | 2025 |
| Riffta Ltd | Information & communication | 2017 |
| Right Advice Centre Limited | Financial services | 2003 |
| Right Concrete Pump Limited | Construction | 2021 |
| Right Cover Security Limited | Administrative & support | 2021 |
| Right Floors Limited | Wholesale & retail | 2007 |
| Right Guard Ltd | Administrative & support | 2018 |
| Right Homes Sales & Lettings Agents Ltd | Real estate | 2025 |
| Right Maintenance Services Ltd | Construction | 2019 |
| Right Move Real Estate Ltd | Real estate | 2023 |
| Right Point London Limited | Information & communication | 2018 |
| Rightprice Landscaping Ltd | Administrative & support | 2026 |
| Rigmi Ltd | Wholesale & retail | 2024 |
| Rihaa Limited | Wholesale & retail | 2026 |
| Rihlat AL OUD Limited | Wholesale & retail | 2025 |
| RIK Holdings Ltd | Real estate | 2020 |
| Rikmart Ltd | Wholesale & retail | 2019 |
| Rimmy's by AM Limited | Wholesale & retail | 2019 |
| Rimpoche Limited | Information & communication | 2013 |
| Rimsha Locum Ltd | Health & social care | 2023 |
| Rimshify Ltd | Wholesale & retail | 2025 |
| Rinbale Carpets & Flooring Limited | Construction | 2009 |
| Rinbale Holdings Ltd | Real estate | 2019 |
| Rindi Barber Shop 2 Ltd | Other services | 2023 |
| Rindord Sentinel Security 2 Ltd | Financial services | 2026 |
| Rino Retail Ltd | Wholesale & retail | 2024 |
| Riotworx Sports Consultancy Ltd | Arts & recreation | 2021 |
| Ripe NOW Investments Ltd | Financial services | 2015 |
| Ripple Insights Ltd | Professional & scientific | 2024 |
| Rise & Shine Nursery Ltd | Education | 2014 |
| Rise and Go Cafe CIC | Hospitality | 2023 |
| Rise Tutoring Ltd | Education | 2024 |
| Riseinuk Infotech Limited | Information & communication | 2024 |
| Riseinuk Recruitment Ltd | Wholesale & retail | 2024 |
| Riseup Housing CIC | Hospitality | 2025 |
| Rishta Network Limited | Other services | 2026 |
| Rishtani Technologies Ltd | Information & communication | 2010 |
| Rising Hatters Youth Club Community Interest Company | Arts & recreation | 2024 |
| Risora Ltd | Wholesale & retail | 2026 |
| Rispro Ltd | Construction | 2026 |
| Ristra Limited | Professional & scientific | 2007 |
| Ritarose Beauty London Limited | Other services | 2025 |
| Rite Click Properties Ltd | Households | 2020 |
| Ritecare Hub Ltd | Health & social care | 2025 |
| Rits Consulting Limited | Information & communication | 2024 |
| Rivaaj Designs Ltd | Wholesale & retail | 2020 |
| Rivaaj Group Ltd | Real estate | 2026 |
| Rivacare Limited | Health & social care | 2015 |
| River Court Luton Limited | Households | 1996 |
| River Way Tech Limited | Information & communication | 2017 |
| Riverbirch Investments Limited | Real estate | 2011 |
| Riviera International Consultant Ltd | Wholesale & retail | 2023 |
| Rivo Luton Airport Cars Ltd | Transport & logistics | 2026 |
| Rivulet Limited | Health & social care | 2022 |
| Rivulets Enterprise Ltd | Information & communication | 2012 |
| Rivya Ltd | Wholesale & retail | 2024 |
| Riya & Josh Co Ltd | Health & social care | 2018 |
| Riya Business Enterprises Ltd | Wholesale & retail | 2021 |
| Riyadh Properties Ltd | Real estate | 2024 |
| RIZ and FIZ Limited | Wholesale & retail | 2018 |
| Rizon Growth Ltd | Administrative & support | 2026 |
| Rizvi Business Consultants Limited | Professional & scientific | 2022 |
| Rizvi Medics Ltd | Health & social care | 2015 |
| Rizwan Ashraf Limited | Wholesale & retail | 2024 |
| RJ Convenience Store Ltd | Wholesale & retail | 2019 |
| RJ Medical Consultants Limited | Health & social care | 2007 |
| RJ Property Investments Limited | Real estate | 2007 |
| RJ Textile Trade Ltd | Manufacturing | 2026 |
| RJA Consultancy Solutions Limited | Information & communication | 2025 |
| Rjan Properties Ltd | Real estate | 2023 |
| RJB Express Limited | Transport & logistics | 2020 |
| RJB Group Partners Ltd | Transport & logistics | 2026 |
| RJB Mechanical & Plant Hire Ltd | Construction | 2016 |
| RJB Sales Limited | Wholesale & retail | 2006 |
| RJK Couriers Ltd | Transport & logistics | 2023 |
| RJK Development Consulting Ltd | Professional & scientific | 2026 |
| RJK Management Limited | Construction | 2011 |
| RJM Aesthetics Ltd | Health & social care | 2026 |
| RJN Care Limited | Administrative & support | 2022 |
| RK Careplus Limited | Health & social care | 2025 |
| RK Desserts Limited | Hospitality | 2026 |
| RK Garage Services Ltd | Wholesale & retail | 2026 |
| RK Groups of Holdings Ltd | Administrative & support | 2024 |
| RK Property Pro Ltd | Real estate | 2024 |
| RK Safety Consultants Ltd | Professional & scientific | 2024 |
| RK Soft Limited | Information & communication | 2013 |
| RKB Distribution Limited | Transport & logistics | 2026 |
| RKF Building & Developments Ltd | Construction | 2021 |
| Rkhanfood Limited | Hospitality | 2025 |
| Rkho Consultancy Limited | Administrative & support | 2018 |
| Rkho Holdings Limited | Financial services | 2023 |
| Rkho Investments Limited | Administrative & support | 2023 |
| RKJ Logistics UK Limited | Transport & logistics | 2026 |
| RKP IT Ltd | Information & communication | 2025 |
| RKP Tuition Ltd | Education | 2025 |