| Ralucaovy Ltd | Construction | 2013 |
| RAM Veer Properties Ltd | Real estate | 2022 |
| Rama Property Investments Ltd | Real estate | 2023 |
| Rama Property Refurbishment Limited | Construction | 2011 |
| Ramdev Retail Store Ltd | Wholesale & retail | 2026 |
| Ramkrish Properties Limited | Real estate | 2020 |
| Ramon Ltd | Professional & scientific | 2021 |
| Ramprate Limited | Real estate | 1988 |
| Ramsons Foods Limited | Wholesale & retail | 2011 |
| Rana Limited | Construction | 2007 |
| Rang Technologies UK Limited | Information & communication | 2022 |
| Rangetrack Limited | Construction | 2002 |
| Rante Limited | Information & communication | 2017 |
| Rapid Accounting Solutions Limited | Professional & scientific | 2016 |
| Rapid Deployment Solutions Limited | Professional & scientific | 1990 |
| Rapid Rentals Residencies Ltd | Real estate | 2024 |
| Rapid Software Consultancy Limited | Information & communication | 2010 |
| Rapid Wholesale Ltd | Wholesale & retail | 2023 |
| Raqeeb Limited | Real estate | 2019 |
| Rares Trans Ltd | Transport & logistics | 2015 |
| Rars Properties Limited | Real estate | 2017 |
| Rashid & Co (London) Ltd | Professional & scientific | 2021 |
| Rateward Limited | Real estate | 1981 |
| Rathgaar Mountbatten Limited | Real estate | 2021 |
| Rautogrove Limited | Wholesale & retail | 1975 |
| Ravenswood Foundation | Extraterritorial | 1991 |
| Ravenswood Property Ltd | Real estate | 2016 |
| Ravenswood Trustees Limited | Other services | 1995 |
| Rawnaq Aldur Limited | Professional & scientific | 2021 |
| RAY Fawehimi Limited | Construction | 1999 |
| Rayna Beverages Limited | Wholesale & retail | 2025 |
| Rayners Lane Football Club Limited | Arts & recreation | 2026 |
| Raza 59 Holdings Limited | Real estate | 2024 |
| Raziak Limited | Wholesale & retail | 2015 |
| Razor Sharp Productions Limited | Administrative & support | 2014 |
| Razor Vibe Limited | Other services | 2021 |
| Razorvibe Barbers LLP | | 2022 |
| RB Cleaning Limited | Administrative & support | 2026 |
| RBA Locum Limited | Health & social care | 2020 |
| RBG Builders Limited | Construction | 2018 |
| RC Hicks Homes Limited | Real estate | 2024 |
| Rciacob Ltd | Wholesale & retail | 2015 |
| RCJ Procurement Limited | Administrative & support | 2018 |
| Rcms Engineering Limited | Professional & scientific | 2012 |
| Rcms Properties Limited | Real estate | 2026 |
| Rcqs (UK) Limited | Professional & scientific | 2016 |
| RD Overseas Ltd | Information & communication | 2022 |
| RDA Properties & Investment Limited | Real estate | 2025 |
| RDI Investment Group Ltd | Financial services | 2023 |
| Rdmp Investments Ltd | Real estate | 2025 |
| RDS Properties and Management Ltd | Real estate | 2018 |
| RE Bentley Assets Limited | Real estate | 2024 |
| Reading Skylight LLP | | 2017 |
| Real Design Studio Limited | Information & communication | 2026 |
| Real Estate Investment Management Limited | Real estate | 2012 |
| Real Estates (New Homes and Developments) Ltd | Real estate | 2009 |
| Rear of 3 the Mall (Ealing) Limited | Real estate | 2021 |
| Rebecca Strickson Limited | Arts & recreation | 2013 |
| Rebecca Watson Limited | Professional & scientific | 2022 |
| Rebeccas Sweet Cones Limited | Wholesale & retail | 2018 |
| Rebel Blooms Limited | Professional & scientific | 2017 |
| Rebel Brand Design Ltd | Arts & recreation | 2013 |
| Receptor Chem Ltd | Professional & scientific | 2015 |
| Reconditioned Stairlifts Ltd | Manufacturing | 2022 |
| Recruitamum Limited | Administrative & support | 2016 |
| Recruitment Drive UK Ltd | Administrative & support | 2021 |
| Red Devils IT Limited | Information & communication | 2016 |
| Red Ekspres Ltd | Wholesale & retail | 2026 |
| Red, White and Blue Solutions Limited | Professional & scientific | 2024 |
| Redcrest Consulting Limited | Financial services | 2017 |
| Redgate Park Services Limited | Construction | 2014 |
| Redinc Tattoo Limited | Wholesale & retail | 2015 |
| Redix Construction Ltd | Construction | 2022 |
| Redlite Laser Limited | Wholesale & retail | 2015 |
| Rednoon Limited | Other services | 2014 |
| Redrobin Ventures Limited | Professional & scientific | 2022 |
| Redstar Holdings Limited | Real estate | 2017 |
| Redstar One Limited | Real estate | 2020 |
| Redstone Black Ltd | Real estate | 2017 |
| Redweave Limited | Real estate | 2010 |
| Reef Construction Limited | Construction | 2015 |
| Reesi Limited | Professional & scientific | 2020 |
| Reeves Accountants Ltd | Professional & scientific | 2023 |
| Reflect-On Academy | Health & social care | 2016 |
| Reform Skincare UK Limited | Other services | 2024 |
| Refugees Ltd | Manufacturing | 2020 |
| Regal Creative Design Ltd | Manufacturing | 2023 |
| Regency & Co. Global Investments Limited | Financial services | 2025 |
| Reha Logistic Ltd | Wholesale & retail | 2025 |
| Reinvest London LLP | | 2022 |
| Reis Quality Ltd | Wholesale & retail | 2026 |
| Rejoin Studio Limited | Manufacturing | 2026 |
| Rejuvion Sciences Ltd | Manufacturing | 2025 |
| Rekam Global Ltd | Real estate | 2025 |
| Reliable Accounts Ltd | Professional & scientific | 2023 |
| Reliance (GB) Limited | Other services | 2010 |
| Reliex Limited | Construction | 2020 |
| Remavon Limited | Real estate | 1987 |
| Remfly Ltd | Real estate | 2020 |
| Remo Investments Ltd | Real estate | 2018 |