| Reignsotstore Ltd | Wholesale & retail | 2026 |
| Reikai Group Ltd | Wholesale & retail | 2026 |
| Reinfo DEV Ltd | Professional & scientific | 2019 |
| Reinforce IT Solutions Ltd | Information & communication | 2024 |
| Rejs UK INT Ltd | Wholesale & retail | 2016 |
| Relax Constructions Ltd | Construction | 2021 |
| Relevant House Ltd | Construction | 2023 |
| Relia Cars Ltd | Wholesale & retail | 2023 |
| Reliable Cars Berkshire Limited | Wholesale & retail | 2009 |
| Reliable Logistics UK Ltd | Transport & logistics | 2025 |
| Reliable Network Technologies Ltd | Information & communication | 2010 |
| Reliable Roofcare Ltd | Construction | 2026 |
| Reliable Workforce Solutions Ltd | Administrative & support | 2025 |
| Reliablyclean Ltd | Administrative & support | 2024 |
| Reliance Auto Test Slough Ltd | Wholesale & retail | 2014 |
| Reliance Cleaning & Property Renovations Ltd | Construction | 2024 |
| Reliance Industries UK Ltd | Wholesale & retail | 2006 |
| Relife Physiotherapy UK Ltd | Health & social care | 2023 |
| Relocatepro Ltd | Transport & logistics | 2025 |
| Relux Shop Ltd | Wholesale & retail | 2024 |
| Remedics Limited | Other services | 2025 |
| Remel-Trans Ltd | Transport & logistics | 2022 |
| Remotebuddy Limited | Information & communication | 2024 |
| Remowork Ltd | Wholesale & retail | 2021 |
| Renaissance Retail Limited | Wholesale & retail | 1991 |
| Renascience Pharma Limited | Manufacturing | 2015 |
| Renat Consultancy Ltd | Administrative & support | 2016 |
| RENDER1 Ltd | Construction | 2025 |
| Rene-Bed Business System Limited | Health & social care | 2018 |
| Renew for YOU Limited | Energy | 2016 |
| Renew Office Limited | Wholesale & retail | 2026 |
| Renew Power International Limited | Financial services | 2018 |
| Renopro Ltd | Construction | 2025 |
| Renovate Real Estate Ltd | Real estate | 2024 |
| Renovationspro Ltd | Construction | 2025 |
| Renshaw Systems Limited | Professional & scientific | 1989 |
| Rent a Space (Self-Storage) Limited | Real estate | 2015 |
| Rent IT OUT Ltd | Real estate | 2025 |
| Rent UK Property Limited | Real estate | 2012 |
| Rental Lane Properties Ltd | Real estate | 2023 |
| Rentals Timeshare Ltd | Real estate | 2023 |
| Rentkey Ltd | Real estate | 2025 |
| Rento Homes Ltd | Real estate | 2018 |
| Rentradeuk Limited | Construction | 2025 |
| REP Rubber Injection Limited | Wholesale & retail | 2005 |
| Replay Products Ltd | Wholesale & retail | 2021 |
| Replay Sports Limited | Wholesale & retail | 1989 |
| Reri Ltd | Real estate | 2023 |
| Reshape U Clinic Ltd | Health & social care | 2021 |
| Resi-Pave London Limited | Administrative & support | 2013 |
| RESIDENCE4U Limited | Real estate | 2018 |
| Resilient Culture Co Ltd | Education | 2021 |
| Resilient Healthcare International Ltd | Health & social care | 2024 |
| Resilius Ltd | Administrative & support | 2015 |
| Resource Productions CIC | Information & communication | 2018 |
| Resourcepharm Limited | Other services | 2010 |
| Restorative Homes Ltd | Hospitality | 2022 |
| Restorative Property Ltd | Real estate | 2024 |
| Restore Plumbing Ltd | Construction | 2025 |
| Restoring Gate Security Services Ltd | Administrative & support | 2025 |
| Retail Development GB Limited | Wholesale & retail | 2026 |
| Retail Optimisation Ltd | Professional & scientific | 2026 |
| Retail Specialist Services Limited | Administrative & support | 2025 |
| Retail Support Solutions Ltd | Manufacturing | 2015 |
| Retech Cycle Limited | Wholesale & retail | 2025 |
| Retriever Property Ltd | Real estate | 2026 |
| Retriever Sports Limited | Manufacturing | 1978 |
| Retrofit Clicks Ltd | Professional & scientific | 2014 |
| Retrofit Experts Ltd | Other services | 2021 |
| Retroflex Limited | Real estate | 2007 |
| Retrotech Home Installations Ltd | Construction | 2019 |
| Reuben Investments Limited | Real estate | 2024 |
| Reva Property Holdings Ltd | Real estate | 2009 |
| Revacc Ltd | Professional & scientific | 2013 |
| Revive Carpentry Ltd | Construction | 2017 |
| Revive Mattresses Limited | Manufacturing | 2025 |
| Reward Car Hire Ltd | Administrative & support | 2019 |
| Rewired Consultancy Services Ltd | Information & communication | 2024 |
| Rewound Clothing Ltd | Wholesale & retail | 2022 |
| Rexa Wholesale Limited | Wholesale & retail | 2025 |
| Rexigen Ltd | Manufacturing | 2018 |
| Reyan Trading Ltd | Wholesale & retail | 2025 |
| Reyman Studio Limited | Professional & scientific | 2019 |
| Reytan PVT Ltd | Real estate | 2025 |
| Rfaa Limited | Hospitality | 2020 |
| Rfaqk Ltd | Construction | 2018 |
| RFR Recruitment Ltd | Administrative & support | 2025 |
| RG Mioto Ltd | Transport & logistics | 2020 |
| RG Structural Engineering Services Limited | Construction | 2024 |
| Rgb&D Ltd | Construction | 2019 |
| RGS Courier Ltd | Transport & logistics | 2025 |
| RGV Property Services Ltd | Construction | 2026 |
| RGZ Marketing Agency Limited | Manufacturing | 2026 |
| RH Health Group Ltd | Health & social care | 2026 |
| Rhodes Freight Services Limited | Transport & logistics | 2009 |
| Rhsu Removals Limited | Transport & logistics | 2026 |
| Rhythm of Events Limited | Hospitality | 2025 |
| Rhythmic Moments Limited | Arts & recreation | 2024 |
| Rhyzon Ltd | Wholesale & retail | 2025 |
| RHZ Estates Limited | Real estate | 2025 |