| RDS Developments Ltd | Construction | 2015 |
| Rdsmith Ltd | Health & social care | 2025 |
| RDT Build Ltd | Construction | 2003 |
| RDW Railworkers Ltd | Construction | 2018 |
| RDX Property Services Limited | Real estate | 2024 |
| RE Cucina Limited | Hospitality | 2023 |
| Re-Fresh Consultancy Limited | Financial services | 2008 |
| Re-Imagineers Limited | Information & communication | 2016 |
| Re-List Limited | Wholesale & retail | 2017 |
| Re-Scene Ltd | Information & communication | 2019 |
| Re-Tek (UK) Limited | Administrative & support | 1996 |
| Re-Thrive Ventures Ltd | Professional & scientific | 2024 |
| Re:Light Limited | Professional & scientific | 2002 |
| Re:Right Design Ltd | Professional & scientific | 2023 |
| Re:Store Congresbury Ltd | Wholesale & retail | 2020 |
| Reaal Ltd | Arts & recreation | 2018 |
| Reability Ltd | Health & social care | 2011 |
| Reable Energy Limited | Professional & scientific | 2023 |
| Reacc Group Ltd | Information & communication | 2022 |
| Reach Biotech C.I.C. | Education | 2024 |
| Reach Brands Limited | Administrative & support | 2015 |
| Reach OUT Investments Limited | Extraterritorial | 2017 |
| Reach OUT Property Limited | Real estate | 2016 |
| Reach Scaffolding (Bristol) Limited | Construction | 2012 |
| Reach Software Ltd | Information & communication | 2026 |
| React Events Ltd | Arts & recreation | 2018 |
| React Live Ltd | Arts & recreation | 2018 |
| React Properties Ltd | Real estate | 2025 |
| React Property Management Ltd | Real estate | 2021 |
| Reactive Building Services (South West) Limited | Construction | 2019 |
| Reactive IT Solutions Limited | Other services | 2014 |
| Reactive Maintenance Services Limited | Other services | 1999 |
| Reactive Properties Limited | Real estate | 2015 |
| Reactive Sports Media UK Limited | Education | 2014 |
| Reactvision AR Limited | Extraterritorial | 2025 |
| Reading Air Conditioning Ltd | Energy | 2025 |
| Reading Security Ltd | Administrative & support | 2026 |
| Readit Limited | Households | 1983 |
| Ready Rags UK Limited | Administrative & support | 1995 |
| Ready Solutions (Europe) Limited | Administrative & support | 2017 |
| Ready Steadi Go Ltd | Information & communication | 2008 |
| Ready to Go Driving School Ltd | Extraterritorial | 2019 |
| Ready to Work Online Limited | Administrative & support | 2018 |
| Readyrevision Ltd | Information & communication | 2024 |
| Reagan Management Limited | Households | 1982 |
| Real Accessories Ltd | Wholesale & retail | 2017 |
| Real ALE Developments Limited | Construction | 2014 |
| Real Brasil Store Ltd | Wholesale & retail | 2020 |
| Real Bristol Limited | Other services | 2025 |
| Real Bristol News Limited | Extraterritorial | 2014 |
| Real Cafe Ltd | Hospitality | 2019 |
| Real Clothing Brand Ltd | Wholesale & retail | 2023 |
| Real Coffee Outdoors Limited | Hospitality | 2007 |
| Real Commercial Kitchen Solutions Ltd | Manufacturing | 2021 |
| Real Escape Travel Limited | Administrative & support | 2016 |
| Real Estate Andrei Limited | Real estate | 2023 |
| Real Estate Asset Development Limited | Real estate | 2017 |
| Real Estate Resolve Ltd | Extraterritorial | 2023 |
| Real Future Media Limited | Information & communication | 2025 |
| Real Good Fitness Ltd | Health & social care | 2020 |
| Real Habesha UK Limited | Hospitality | 2025 |
| Real Innovative Solutions Ltd | Information & communication | 2025 |
| Real Photography CIC | Arts & recreation | 2017 |
| Real Render Ltd | Construction | 2022 |
| Real Roar Ltd | Wholesale & retail | 2025 |
| Real SC Consultancy Limited | Real estate | 2013 |
| Real Secure Security Limited | Hospitality | 2025 |
| Real-Time Africa Limited | Extraterritorial | 2013 |
| Real-Time Magic Limited | Information & communication | 1998 |
| REAL2REEL Solutions Ltd | Information & communication | 2015 |
| Realise Design Ltd | Professional & scientific | 2008 |
| Realise Property Maintenance Ltd | Construction | 2024 |
| Realised Solutions Limited | Professional & scientific | 2017 |
| Reality Checked Ltd | Information & communication | 2020 |
| Reality Sailing Ltd | Professional & scientific | 2020 |
| Really Good Kitchens Ltd | Hospitality | 2020 |
| Really Good Solutions Limited | Information & communication | 2025 |
| Really Good Wine Bars Limited | Hospitality | 2018 |
| Really Nice Steel Ltd | Professional & scientific | 2019 |
| Realm Investment Management Limited | Professional & scientific | 2018 |
| Realms of Tiberium Ltd | Extraterritorial | 2022 |
| Realsounds Music Ltd | Information & communication | 2014 |
| Realtime Foundry Limited | Information & communication | 2025 |
| Realtime Synergy Limited | Information & communication | 2021 |
| Reanne Morgan Ltd | Wholesale & retail | 2026 |
| Reason Interiors Limited | Wholesale & retail | 2010 |
| REASON19 Holdings Ltd | Financial services | 2025 |
| REASON19 Investments Ltd | Real estate | 2025 |
| Reata UK Limited | Professional & scientific | 2009 |
| Rebecca Beauty Spa Ltd | Other services | 2019 |
| Rebecca Cook Creative Limited | Wholesale & retail | 2025 |
| Rebecca Jago Limited | Professional & scientific | 2025 |
| Rebecca Knott PA Limited | Administrative & support | 2025 |
| Rebecca Larpent Ltd | Administrative & support | 2025 |
| Rebecca Saunders Hairdressing Limited | Other services | 2024 |
| Rebecca Sherman Ltd | Professional & scientific | 2020 |
| Rebel and Slaughter Ltd | Professional & scientific | 2014 |
| Rebel Bars Ltd | Hospitality | 2025 |
| Rebel Beauty Bristol Limited | Other services | 2025 |
| Rebel Roast Coffee Ltd | Manufacturing | 2025 |