| Reggie Dubb Ltd | Manufacturing | 2020 |
| Regiis 121 Ltd | Real estate | 2023 |
| Regiis Consultants Ltd | Wholesale & retail | 2025 |
| Regiis Group Ltd | Wholesale & retail | 2023 |
| Regional Properties Investments Ltd | Real estate | 2012 |
| Regis Development Ltd | Real estate | 2023 |
| Regulatory Intelligence Limited | Professional & scientific | 2010 |
| Reguloop Ltd | Public administration | 2025 |
| Regus Kapital Ltd | Real estate | 2022 |
| Regusure Ltd | Professional & scientific | 2025 |
| Rehan&Subhan Ltd | Construction | 2026 |
| Rehiat Ltd | Real estate | 2022 |
| Rehmanbva Limited | Wholesale & retail | 2019 |
| Rehmantech Ltd | Wholesale & retail | 2026 |
| Rehobot 75 Ltd | Health & social care | 2023 |
| Rehoboth Accommodation Ltd | Real estate | 2023 |
| Rehoboth Education Clinic & Consulting Services Limited | Education | 2012 |
| Rehoboth Homecare Limited | Education | 2016 |
| Rehoboth Removals Ltd | Transport & logistics | 2026 |
| Rehraj Ltd | Wholesale & retail | 2024 |
| Reian Construction Ltd | Construction | 2020 |
| Reian Properties Ltd | Real estate | 2026 |
| Reidro Consulting Ltd | Information & communication | 2020 |
| Reimer Limited | Transport & logistics | 2023 |
| Reise Support Solutions Ltd | Real estate | 2024 |
| Reksio K9 Care&Travel Limited | Agriculture & fishing | 2018 |
| Relaibaality Ltd | Wholesale & retail | 2024 |
| Relanda Court Management Limited | Administrative & support | 1987 |
| Relate Property Services Ltd | Real estate | 2023 |
| Relaxed Move Ltd | Real estate | 2026 |
| Reldox Ltd | Wholesale & retail | 2021 |
| Reliable and Reasonable Moves Ltd | Transport & logistics | 2022 |
| Reliable Gardening Services Limited | Administrative & support | 2024 |
| Reliable Hands UK Ltd | Transport & logistics | 2025 |
| Reliable Market Ltd | Wholesale & retail | 2024 |
| Reliable Roofers Ltd | Construction | 2025 |
| Reliable Traders Ltd | Wholesale & retail | 2014 |
| Reliance Property Lets Ltd | Real estate | 2024 |
| Reliance Wholesale Limited | Wholesale & retail | 2011 |
| Rellab Ltd | Information & communication | 2026 |
| Relu Transport Ltd | Transport & logistics | 2025 |
| Rema Services Ltd | Professional & scientific | 2024 |
| Remanufacture Injectors Ltd | Manufacturing | 2025 |
| Remarco Limited | Information & communication | 2019 |
| Remat Properties Ltd | Financial services | 2025 |
| Remedium Investments Ltd | Other services | 2017 |
| Remedium Medical Solutions Ltd | Administrative & support | 2017 |
| Remedy Sound Limited | Information & communication | 2012 |
| Remus Ericone Limited | Administrative & support | 2020 |
| REN - Pro Services Ltd | Transport & logistics | 2018 |
| Renaissance Widows AID Foundation UK | Health & social care | 2024 |
| Renaldo Stefan Transportation Ltd | Transport & logistics | 2020 |
| Rence Health Consult Limited | Health & social care | 2023 |
| Rendlesham Development Limited | Construction | 2021 |
| Rene Roux Limited | Health & social care | 2021 |
| Renegade Autos Ltd | Wholesale & retail | 2025 |
| Renevatio Motor Cars Limited | Professional & scientific | 2018 |
| Renew Healthcare Limited | Health & social care | 2022 |
| Rennew Ltd | Wholesale & retail | 2020 |
| Renouveau Ltd | Health & social care | 2023 |
| Renown Construction Services Ltd | Construction | 2024 |
| Renowork Ltd | Real estate | 2024 |
| Rent Connect Housing Limited | Real estate | 2011 |
| Rent Connect Properties Limited | Real estate | 2017 |
| Rent for JD Ltd | Real estate | 2019 |
| Rent Hire Go Ltd | Transport & logistics | 2026 |
| Rent My Block Limited | Real estate | 2025 |
| Rent Radar Ltd | Information & communication | 2025 |
| Rental Connect Ltd | Real estate | 2025 |
| Rentanest Ltd | Real estate | 2021 |
| Rentsro Ltd | Construction | 2020 |
| Renvox Ltd | Construction | 2025 |
| Renza Goods Limited | Wholesale & retail | 2026 |
| Reoch Florence Limited | Health & social care | 2021 |
| Repaid Maintenance Ltd | Other services | 2021 |
| Repair Zone Limited | Professional & scientific | 2017 |
| Reqruit Ltd | Administrative & support | 2025 |
| Rerum Villas International Limited | Real estate | 2017 |
| Rescue My Tyre Ltd | Wholesale & retail | 2022 |
| Research Supplies Ltd | Wholesale & retail | 2025 |
| Research Technology Consultant Limited | Hospitality | 2020 |
| Reseller Hub 121 Limited | Wholesale & retail | 2025 |
| Reset Revolution Ltd | Arts & recreation | 2025 |
| Resetplanet Ltd | Water & waste | 2021 |
| Reshape (Luton) Ltd | Arts & recreation | 2020 |
| Reshape at Ltd | Health & social care | 2023 |
| Reshika Residentials Limited | Real estate | 2021 |
| Residential Park Homes Dorset Ltd | Real estate | 2023 |
| Resist Ltd | Wholesale & retail | 2013 |
| Resolute Financial Solutions Limited | Professional & scientific | 2026 |
| Resolve Electrical Ltd | Manufacturing | 2024 |
| Resolve Plumbing, GAS and Electrical Ltd | Construction | 2026 |
| Resource Gate Ltd | Administrative & support | 2016 |
| Response Personnel Limited | Administrative & support | 1997 |
| Responsive QA Ltd | Information & communication | 2013 |
| Restorative Health Ltd | Health & social care | 2024 |
| Results International Consultancy Limited | Education | 2019 |
| Retail Nexus Ltd | Wholesale & retail | 2025 |
| RETAIL360 Limited | Wholesale & retail | 2015 |
| Retailisto Limited | Wholesale & retail | 2022 |