| R&R Vehicles Ltd | Wholesale & retail | 2015 |
| R&R Workshop Ltd | Real estate | 2024 |
| R&S Property Management and Consultancy Ltd | Construction | 2023 |
| R&Z Brickwork Limited | Construction | 2016 |
| R-B Installations Limited | Construction | 2014 |
| R. E. D. Scaffolding Limited | Construction | 1999 |
| R. E. Dickinson Properties Limited | Real estate | 1997 |
| R.C.D Designs Limited | Information & communication | 2008 |
| R.J.A. Electrical Ltd. | Construction | 2002 |
| R.O'Rourke & SON Limited. | Construction | 1991 |
| R.S Britannia Costruction Ltd | Construction | 2023 |
| RA Construction and Design Limited | Construction | 2025 |
| RAA Construction Ltd | Construction | 2020 |
| Raac Consulting Solutions Ltd | Professional & scientific | 2023 |
| Rabaskincare Ltd | Wholesale & retail | 2026 |
| Rabboni Consulting Limited | Information & communication | 2024 |
| Racad Arabaca 8 Ltd | Financial services | 2026 |
| Rachel Heseltine Limited | Real estate | 2014 |
| Rachemma Limited | Wholesale & retail | 2024 |
| Racing Nineteen Ltd | Other services | 2025 |
| Radar Life Limited | Professional & scientific | 2010 |
| Radiant Riddles Day Care Ltd | Health & social care | 2024 |
| Radpid Diagnostics Ltd | Health & social care | 2017 |
| Radu/Trans Holding Ltd | Transport & logistics | 2018 |
| Radzevic Ltd | Administrative & support | 2026 |
| Raffe Burrell Studio Ltd. | Professional & scientific | 2015 |
| Raffles (GB) Limited | Hospitality | 2006 |
| Raffzet Ltd | Transport & logistics | 2013 |
| Rahat Munim & Co. Ltd | Real estate | 2025 |
| Rahbot Property Solutions Ltd | Construction | 2025 |
| Rahma Welfare UK Ltd | Other services | 2025 |
| Rahq Motors Ltd | Wholesale & retail | 2023 |
| Rail Check Ltd | Construction | 2019 |
| Rail Insight Limited | Professional & scientific | 2022 |
| Railwear Ltd | Wholesale & retail | 2025 |
| Rainbow Carpets (Welling) Limited | Wholesale & retail | 1997 |
| Rainbow Day Nursery (Early Years Centre) Limited | Education | 2003 |
| Rainbows of Hope Ltd | Wholesale & retail | 2021 |
| Raincorp Limited | Manufacturing | 2025 |
| RAJ Builders Ltd | Construction | 2026 |
| RAJ Nila Properties Ltd | Real estate | 2026 |
| Rajagopal Ltd | Real estate | 2012 |
| Rajagopal Properties Limited | Real estate | 2017 |
| RALPH24 Limited | Financial services | 2024 |
| RALPHMERCY1 Limited | Other services | 2026 |
| Raluk Beauty Ltd | Other services | 2023 |
| Rambat Limited | Construction | 2016 |
| Rambling Games Ltd | Manufacturing | 2023 |
| Ramdoot Foods Ltd | Hospitality | 2026 |
| Rameshwaram Limited | Other services | 2025 |
| Ramona Services London Ltd | Health & social care | 2021 |
| Rams Business Limited | Hospitality | 2022 |
| Rams Elevators Ltd | Construction | 2024 |
| RAN Perform Limited | Information & communication | 2017 |
| Rana Office Group Ltd | Administrative & support | 2019 |
| Range Electrical Ltd | Construction | 2023 |
| Range Investment Holdings Ltd | Real estate | 2024 |
| Rangeworth Place Management Company Limited | Households | 1986 |
| Ranjeet Clauneck Limited | Wholesale & retail | 2024 |
| Raphsym Consult Ltd | Professional & scientific | 2020 |
| Rapid Creative Limited | Professional & scientific | 2020 |
| Rapid Design and Build Ltd | Construction | 2023 |
| Rapid Rope Access Limited | Manufacturing | 2019 |
| Rapid Stock Trades Limited | Wholesale & retail | 2026 |
| Rapid Transit Limited | Transport & logistics | 2018 |
| Raptor Plant & Machinery Ltd | Wholesale & retail | 2026 |
| Rare Cave Limited | Extraterritorial | 2026 |
| Rase Leisure & Recreation Ltd | Construction | 2020 |
| Rastawood Designs Ltd | Construction | 2020 |
| RAW Suppliers Ltd | Wholesale & retail | 2024 |
| Rawmarsh Developments Limited | Real estate | 2017 |
| Rawson Properties Ltd | Real estate | 2021 |
| Ray&Marcopaulo Ltd | Health & social care | 2017 |
| Ray-Cay Holdings Ltd | Financial services | 2023 |
| Raya Electrical Ltd | Construction | 2024 |
| Rayner LOW Carbon Technologies Ltd | Professional & scientific | 2018 |
| Rayner Rayner Ltd | Information & communication | 2011 |
| Rayners Trainers Ltd | Administrative & support | 2016 |
| Razal Construction Ltd | Construction | 2019 |
| Razzberry Panda Agency LLP | | 2015 |
| RB Construction & Design Ltd | Construction | 2018 |
| RBI Rental Ltd | Construction | 2024 |
| RBV Fast Food Ltd | Hospitality | 2023 |
| RBV Supermarket Ltd | Wholesale & retail | 2023 |
| RC Market Ltd | Wholesale & retail | 2026 |
| RCB Design Ltd | Professional & scientific | 2021 |
| Rccg Grace Tabernacle Limited | Other services | 2016 |
| RCK Sensory Group Ltd | Wholesale & retail | 2025 |
| RCN Financial Planning Limited | Financial services | 2014 |
| RCS Specialist Contracting Ltd | Construction | 2025 |
| RCT Films Ltd | Professional & scientific | 2026 |
| RCT Trade Limited | Wholesale & retail | 2014 |
| RDA Construction Services Ltd | Construction | 2026 |
| RDK Management Limited | Real estate | 2021 |
| Rdtel Ltd | Information & communication | 2012 |
| Re-New Drives & Patios Ltd | Construction | 2021 |
| Reach Interiors Limited | Other services | 2020 |
| Reach International Consulting Ltd | Administrative & support | 2021 |
| Reachedin Limited | Information & communication | 2023 |
| Reactive Zero Two Limited | Administrative & support | 2002 |