| Rnic Consultancy Ltd | Professional & scientific | 2021 |
| RNR Sweets Ltd | Wholesale & retail | 2020 |
| RNR Tradelink Limited | Wholesale & retail | 2008 |
| RO HO London Limited | Education | 2025 |
| Roadway Autos Ltd | Wholesale & retail | 2025 |
| Robert Rowland Smith Limited | Administrative & support | 2009 |
| Robertson Property Consulting Limited | Professional & scientific | 2020 |
| Robin Day Enterprises Limited | Agriculture & fishing | 2015 |
| Robin DE Ltd | Wholesale & retail | 2025 |
| Robins Croft Property Ltd | Real estate | 2026 |
| Robinwood Development Ltd | Real estate | 2018 |
| Rochester Property Maintenance Ltd | Households | 2020 |
| Rockerlabs Ltd | Education | 2024 |
| Rocketleads Ltd | Wholesale & retail | 2024 |
| Rockmere Construction Limited | Construction | 2025 |
| Rockmere Holdings Limited | Real estate | 2025 |
| Rockside Healthcare Services Limited | Health & social care | 2024 |
| Rockstar Entertainment Ltd | Hospitality | 2024 |
| Rockwell Court RTM Company Limited | Households | 2020 |
| Rococco House RTM Company Limited | Households | 2025 |
| Rogi Holding Ltd | Financial services | 2019 |
| Roilti PTY Ltd | | 2020 |
| Rokanova Ltd | Wholesale & retail | 2025 |
| Roland Orzabal Limited | Information & communication | 1983 |
| Rolanstar Limited | Wholesale & retail | 2025 |
| Roll Cage Rental Ltd | Transport & logistics | 2016 |
| ROM Power Ltd | Construction | 2019 |
| Roman Candle Productions Ltd | Arts & recreation | 2013 |
| ROMANIAN4KIDS Ltd | Education | 2025 |
| Romech Plumbing Ltd | Construction | 2025 |
| Romex London Ltd | Real estate | 2021 |
| Rookwood School Limited | Education | 2022 |
| Rosedale (Stanmore) Limited | Real estate | 1991 |
| Roseland Private Hire Ltd | Transport & logistics | 2010 |
| Roseland Taxis Limited | Transport & logistics | 2010 |
| Rosemont and Stanmore Ltd | Transport & logistics | 2018 |
| Rosie Cheeks Ltd | Other services | 2025 |
| Rosie Music Limited | Information & communication | 1987 |
| Rossetti Coffee Ltd | Wholesale & retail | 2015 |
| Rossi & Rossi Limited | Wholesale & retail | 1987 |
| Rotacentral Limited | Information & communication | 2016 |
| Rotten Music Limited | Information & communication | 2009 |
| Rowlands Court (Bunns Lane) Management Company Limited | Households | 1979 |
| Roxold Ltd | Real estate | 2019 |
| Roxy & June Limited | Other services | 2019 |
| Royce Communications Limited | Other services | 1988 |
| Royce Communications Trustees Limited | Professional & scientific | 2023 |
| Royco Group Holdings Limited | Administrative & support | 2023 |
| Royco Ltd | Extraterritorial | 2021 |
| Rozefit Ltd | Wholesale & retail | 2023 |
| RP Homes Ltd | Real estate | 2019 |
| RR Assessments Limited | Health & social care | 2023 |
| RR Capital Group Ltd | Financial services | 2025 |
| RR Capital LLP | | 2014 |
| RR Capital NO1 Ltd | Real estate | 2024 |
| RR Capital NO2 Ltd | Real estate | 2018 |
| RR Scouting Ltd | Information & communication | 2003 |
| RRD Investments Ltd | Real estate | 2024 |
| Rrks Properties Limited | Real estate | 2025 |
| RRS Holdings Limited | Financial services | 2018 |
| RS Brothers Construction Ltd | Construction | 2020 |
| RS Elegant Ltd | Transport & logistics | 2014 |
| RS Pawsitive Veterinary Services Limited | Professional & scientific | 2013 |
| RSA Solutions Ltd | Real estate | 2026 |
| RSE Developments Limited | Manufacturing | 2014 |
| Rshira Ltd | Construction | 2025 |
| RSK & Co Developments Limited | Real estate | 2025 |
| RSM Developments Limited | Construction | 2019 |
| RSM Marok Properties Ltd | Real estate | 2018 |
| RSR Fasteners (London) Limited | Wholesale & retail | 2021 |
| Rsst Consultants Limited | Information & communication | 2010 |
| RST Consultancy Services Ltd | Professional & scientific | 2018 |
| Rstt Goods Ltd | Wholesale & retail | 2023 |
| Rstt Property Ltd | Real estate | 2022 |
| RTI Payroll Service Provider Limited | Professional & scientific | 2013 |
| Rtnts GP Ltd | Professional & scientific | 2022 |
| Rtnts Holdings Limited | Real estate | 2020 |
| Rubyross Investments Limited | Real estate | 2017 |
| Ruddock Close RTM Company Limited | Real estate | 2011 |
| Rudraa Consulting Limited | Information & communication | 2018 |
| Rule YS Limited | Real estate | 2021 |
| Ruleser Limited | Professional & scientific | 2024 |
| Rumi Travel Ltd | Administrative & support | 2020 |
| Rupe-Net Ltd | Information & communication | 2024 |
| RUS Plastering Ltd | Construction | 2022 |
| Russ Cudd Consultancy Ltd | Professional & scientific | 2021 |
| Russell Edwards Consultancy Limited | Administrative & support | 2016 |
| Ruswal Global Inspections Ltd | Transport & logistics | 2019 |
| RV Associates Limited | Information & communication | 2013 |
| RV Group Holdings Limited | Professional & scientific | 2016 |
| RVC Haas Limited | Manufacturing | 2021 |
| RVP Properties Limited | Real estate | 2018 |
| RW Assets Limited | Real estate | 2024 |
| RW3 Labs Ltd | Information & communication | 2021 |
| Ryalls Limited | Wholesale & retail | 2011 |
| Rycon Limited | Administrative & support | 2016 |
| Rycon Properties Limited | Real estate | 2016 |
| Rycon Resources Limited | Real estate | 2018 |
| Ryder J Limited | Construction | 2020 |
| S & D Johnson Ltd | Wholesale & retail | 2024 |