| R & M Capital Partners Limited | Real estate | 2016 |
| R & P Entertainment Limited | Information & communication | 2025 |
| R Hamandi Limited | Construction | 2010 |
| R K Supermarket Ltd | Wholesale & retail | 2018 |
| R L Transport Services Ltd | Transport & logistics | 2020 |
| R Murgai Holdings Limited | Construction | 2025 |
| R N Catering London LLP | | 2016 |
| R N Restaurant (Perivale) Limited | Hospitality | 2013 |
| R Nathan Limited | Professional & scientific | 2009 |
| R&F Construction Ltd | Construction | 2025 |
| R&K Amazon Ltd | Wholesale & retail | 2025 |
| R&K Medical Limited | Health & social care | 2021 |
| R&R (Greenford) Ltd | Real estate | 2018 |
| R&R (Luton) Ltd | Real estate | 2022 |
| R&R (Mayfair) Ltd | Real estate | 2018 |
| R&R (Southall) Ltd | Real estate | 2019 |
| R&R (Watford) Ltd | Real estate | 2019 |
| R&R Asset Management Limited | Financial services | 2014 |
| R&R International Ltd | Financial services | 2018 |
| R&T Construction Management Ltd | Construction | 2022 |
| R.S.C.K. Homes Ltd | Health & social care | 2007 |
| R2H Enterprises Limited | Construction | 2024 |
| R3 Carpentry Ltd | Construction | 2026 |
| R8 Motors Ltd | Wholesale & retail | 2022 |
| Racal Electronics Ltd | Manufacturing | 2014 |
| Race Wars (Slot Car Racing Centres) Ltd | Arts & recreation | 2016 |
| Rachel Trading Company Limited | Construction | 2000 |
| Raco-Deco Ltd | Construction | 2021 |
| Radek Electrical Ltd | Construction | 2015 |
| Radfre Ltd | Other services | 2025 |
| Radville Trading Limited | Wholesale & retail | 2015 |
| RAF Construction Services Ltd | Construction | 2024 |
| Rafal Bespoke Renovations Ltd | Construction | 2026 |
| Rafzak Property Management Ltd | Households | 2020 |
| Ragab Properties Limited | Real estate | 2026 |
| Ragusa Associates Limited | Extraterritorial | 2004 |
| Railmuk Limited | Water & waste | 2026 |
| Rainberg Limited | Real estate | 2023 |
| Rainbow Sparks Ltd | Education | 2025 |
| Raincall Limited | Hospitality | 2019 |
| Raja Renovations Ltd | Construction | 2020 |
| Raja&Co Builders Limited | Construction | 2025 |
| Rajan Foods Ltd | Wholesale & retail | 2018 |
| Rajput Elite Limited | Wholesale & retail | 2026 |
| Rajwanshi Co. Limited | Wholesale & retail | 2025 |
| Rakes Pasta Project Ltd | Hospitality | 2023 |
| RAL16 UK Ltd | Wholesale & retail | 2025 |
| RAM Haulage Services Limited | Transport & logistics | 2021 |
| Ramsey Flats Ltd | Construction | 2020 |
| Ramzi Autos Ltd | Wholesale & retail | 2019 |
| RAN Holdings Limited | Financial services | 2025 |
| RAN Residential Homes Ltd | Real estate | 2025 |
| RAN Residential Properties 2 Limited | Real estate | 2026 |
| RAN Residential Properties 3 Limited | Real estate | 2026 |
| RAN Residential Properties 4 Limited | Real estate | 2026 |
| RAN Residential Properties Limited | Real estate | 2025 |
| Ranco Kitchens & Bedrooms Limited | Manufacturing | 2014 |
| Rancom UK Limited | Wholesale & retail | 2002 |
| Randen Group Limited | Real estate | 2022 |
| Rani & Sons Ltd | Wholesale & retail | 2026 |
| Rank Property Investments Limited | Real estate | 2021 |
| Rank Securities Limited | Real estate | 2005 |
| Rapid Properties London Ltd | Real estate | 2023 |
| Rapid Removals & Collections Limited | Transport & logistics | 2006 |
| Rapid Rise Construction Limited | Real estate | 2025 |
| RAPIDFIX247 Ltd | Construction | 2025 |
| RAR Assets Ltd | Real estate | 2021 |
| Rara Blue Carpet Cleaning Services Limited | Administrative & support | 2022 |
| Rara Blue Inventory Services Limited | Administrative & support | 2019 |
| Rara Blue Online Solutions Limited | Professional & scientific | 2022 |
| Rara Blue Real Estate Limited | Real estate | 2020 |
| Rara Blue Recruitment Services Limited | Other services | 2019 |
| Rara Blue Window Cleaning Services Limited | Administrative & support | 2022 |
| Rare Computers Ltd | Wholesale & retail | 2019 |
| Rasoi Junction Limited | Wholesale & retail | 2026 |
| Rathmullan Developments Limited | Real estate | 2015 |
| Raval Properties Limited | Real estate | 2020 |
| Ravenholt Group Limited | Construction | 2025 |
| Ravenor Builders Ltd | Real estate | 2022 |
| Ravenor Farm Studios Limited | Information & communication | 2022 |
| Rawthentic Ltd | Wholesale & retail | 2025 |
| Rayanlit Ltd | Information & communication | 2024 |
| Rayat Properties Limited | Real estate | 2019 |
| Raylion Limited | Construction | 2002 |
| Raymond Taghioff Limited | Administrative & support | 2014 |
| Rayners Garage Limited | Wholesale & retail | 2024 |
| Raytza Refurb Solutions Ltd | Construction | 2024 |
| RAZ Property Maintenance Limited | Households | 2014 |
| RB Image Ltd | Information & communication | 2023 |
| RBU Trade Ltd | Construction | 2023 |
| RD Instalcom Limited | Construction | 2015 |
| RDJ Business Development Limited | Professional & scientific | 2017 |
| Rdwld Ltd | Construction | 2015 |
| Ready to Rave Property Group Limited | Real estate | 2023 |
| Reaidi Co Limited | Real estate | 2021 |
| Real Accounting Solutions Ltd | Professional & scientific | 2019 |
| Real Wheel Deal Ltd | Wholesale & retail | 2025 |
| Reality Surveyors Ltd | Professional & scientific | 2022 |
| Recet UK Ltd | Education | 2024 |
| Recrutify Ltd | Administrative & support | 2024 |