| RBL (JAL) Ltd | Financial services | 2024 |
| RBL (LRL) Ltd | Financial services | 2024 |
| RBL (MAL) Ltd | Financial services | 2024 |
| RBM Property Developments Ltd | Real estate | 2023 |
| RBM SUB Limited | Real estate | 2024 |
| RBT Service Direct LLP | | 2002 |
| RCG Enterprise Limited | Wholesale & retail | 2013 |
| RCM Properties Limited | Real estate | 2022 |
| RCS Roofing Limited | Construction | 2011 |
| RDG Developments Ltd | Real estate | 2014 |
| RDK Roofing Ltd | Construction | 2025 |
| RE Optical Ltd | Wholesale & retail | 2023 |
| Reaching Goals Limited | Manufacturing | 2019 |
| React Accountancy Limited | Professional & scientific | 2011 |
| Reactxr Limited | Information & communication | 2023 |
| Read Associates (North West) Limited | Wholesale & retail | 2003 |
| Ready Creation Ltd | Information & communication | 2025 |
| Ready for EAT Ltd | Hospitality | 2024 |
| Real Estate Legal Solutions Ltd | Professional & scientific | 2023 |
| Real Prestige Ladies Club Ltd | Professional & scientific | 2025 |
| Real to Reel Limited | Wholesale & retail | 2003 |
| Really Electronics Limited | Construction | 2013 |
| Realtouch Global Ventures Ltd | Wholesale & retail | 2025 |
| Realty Properties Ltd | Real estate | 2019 |
| Realyst Ltd | Information & communication | 2026 |
| REB Shayele Limited | Real estate | 2026 |
| Rebound and Aerial Centres of Excellence Limited | Education | 2017 |
| RECLAIMS4U Ltd. | Professional & scientific | 2008 |
| Recom Consultancy Ltd | Education | 2022 |
| Recom Fire Solutions Ltd | Construction | 2024 |
| Recom Solutions Holdings Ltd | Construction | 2023 |
| Recom Solutions Ltd | Construction | 2012 |
| Recommended School of Motoring Ltd | Other services | 2013 |
| Recovrd Ltd | Arts & recreation | 2025 |
| Rectory Greental Investment Ltd | Real estate | 2022 |
| Rectory M8 Ltd | Real estate | 2020 |
| Red OTG Bidco Limited | Administrative & support | 2021 |
| Red Pixel Limited | Information & communication | 2018 |
| Red Rock Realty Limited | Real estate | 2003 |
| Red Rose Construction Group Ltd | Construction | 2025 |
| Red Rose Freight Limited | Transport & logistics | 2022 |
| Red Tomato Electronics (UK) Limited | Wholesale & retail | 2016 |
| Redactus Limited | Information & communication | 2014 |
| Redbank Manchester Limited | Real estate | 2002 |
| Redcote Kirkstall Holdings Limited | Other services | 2024 |
| Reddew Limited | Professional & scientific | 2022 |
| Reddington 230 Ltd | Real estate | 2026 |
| Reddish Housing Ltd | Real estate | 2023 |
| Reddish Kozak Ltd | Real estate | 2021 |
| Redefine EDU Ltd | Education | 2020 |
| Redefine Reformer Pilates Ltd | Arts & recreation | 2026 |
| Redhawk Legal Ltd | Administrative & support | 2010 |
| Redlands Real Estates Limited | Real estate | 2000 |
| Redmore Environmental Holdings Ltd | Financial services | 2024 |
| Redmore Environmental Ltd | Professional & scientific | 2015 |
| Redpod Ltd | Other services | 2014 |
| Redrock Contractors Ltd | Administrative & support | 2017 |
| Redruth Mansfield SPV Limited | Real estate | 2024 |
| Reds Logistics LLC Ltd | Transport & logistics | 2024 |
| Redsd Limited | Administrative & support | 2017 |
| Reech - Tele Directory Ltd | Information & communication | 2021 |
| Reedfield Ltd | Real estate | 2004 |
| Reel Effect Limited | Information & communication | 2012 |
| Reel Impressions Ltd | Professional & scientific | 2026 |
| Reem Travels Limited | Hospitality | 2020 |
| Refind Limited | Other services | 2023 |
| Reflections Beauty Ltd | Wholesale & retail | 2020 |
| Reflections MCR Ltd | Wholesale & retail | 2018 |
| Reform Solutions Ltd | Manufacturing | 2023 |
| Regal Outlet Limited | Wholesale & retail | 2025 |
| Regeneration Coleshill Limited | Other services | 2023 |
| Regent Home Property Management Limited | Real estate | 2017 |
| Regentwood Nominees Ltd | Extraterritorial | 2022 |
| Regina Sales Ltd | Wholesale & retail | 2016 |
| Regional Flooring Company Limited | Construction | 1982 |
| Regional Nominees Limited | Extraterritorial | 2006 |
| Registration Nominees Limited | Real estate | 2001 |
| Regna Industries Limited | Wholesale & retail | 2025 |
| Regun's Ltd | Hospitality | 2025 |
| Rehably Ltd. | Information & communication | 2026 |
| Reich Insurance Brokers Limited | Financial services | 1999 |
| Reich Services Ltd | Administrative & support | 2025 |
| REK Estates Ltd | Real estate | 2023 |
| Rekkel Ltd | Hospitality | 2026 |
| Relaxbetta Beds Limited | | 2010 |
| Reliance Software Ltd | Information & communication | 2019 |
| Reliatech Properties Ltd | Information & communication | 2004 |
| Reliatech Systems Ltd | Construction | 2023 |
| Reljay Solutions Ltd | Real estate | 2013 |
| Remitsnap Ltd | Financial services | 2025 |
| Remko Holdings Limited | Real estate | 2020 |
| Remmytee Ltd | Information & communication | 2025 |
| Remotely Rhoda Ltd | Administrative & support | 2026 |
| Remztrimz Ltd | Other services | 2026 |
| REN Hong (UK) Ltd | Information & communication | 2022 |
| Renaisstay Ltd | Extraterritorial | 2023 |
| Rendad Ltd | Construction | 2020 |
| Renderall UK Ltd | Construction | 2020 |
| Rendiel Ltd | Real estate | 2017 |
| Rendob Holdings Limited | Other services | 2025 |