| RNS Fitness Ltd | Arts & recreation | 2025 |
| Road Chap Ltd | Wholesale & retail | 2023 |
| Road Trippers Limited | Information & communication | 2016 |
| Roan House Management Limited | Households | 1995 |
| Robann Investments Ltd | Real estate | 2015 |
| Robert Lloyd Ltd | Real estate | 2013 |
| Robert Robinson Property Ltd | Real estate | 2015 |
| Robinson Property Rental Limited | Real estate | 2025 |
| Robson Construction Management Ltd | Administrative & support | 2016 |
| Rochester Construction Limited | Construction | 2006 |
| Rochester Tuition Centre Limited | Education | 2004 |
| Rockfavour Ltd | Professional & scientific | 2025 |
| Rockham Holdings Ltd | Financial services | 2020 |
| Rockham Property Ltd | Real estate | 2020 |
| Rocksure Systems Ltd. | Information & communication | 2004 |
| Rockview Social Care Limited | Health & social care | 2021 |
| Rocky Regal Ltd | Households | 2023 |
| Rocky Xpress Ltd | Wholesale & retail | 2024 |
| Rococo Interiors & Furnishings Limited | Professional & scientific | 2018 |
| ROD Eyetech Ltd | Health & social care | 2024 |
| Rodeo Dive Limited | Hospitality | 2014 |
| Roegate Consulting Limited | Professional & scientific | 2019 |
| Rogan Phillips Wealth Advisory Limited | Financial services | 2025 |
| Roger Sylvester Ltd | Wholesale & retail | 2017 |
| Rohman Estates Limited | Real estate | 2021 |
| Rohman Properties Limited | Real estate | 2019 |
| Rokyari Limited | Health & social care | 2021 |
| Roman Group Holdings Ltd | Financial services | 2021 |
| Roman Pools Limited | Construction | 1999 |
| Roman Properties London Ltd | Real estate | 2019 |
| Rondi Autos Ltd | Wholesale & retail | 2019 |
| Ronsons Roofing Ltd | Construction | 2017 |
| Rooby Holidays Ltd | Real estate | 2021 |
| Rooke Group Limited | Financial services | 2022 |
| Roots Contractors (London ) Limited | Construction | 2007 |
| Roots IT Ltd | Information & communication | 2019 |
| Rorschach Films Limited | Information & communication | 2024 |
| Rosart Investments Limited | Real estate | 2023 |
| Rose & Blush Hampers Ltd | Wholesale & retail | 2024 |
| Rose Dining Limited | Hospitality | 2024 |
| Rose P.A. Ltd | Information & communication | 2011 |
| Rosemary Gate Limited | Households | 2006 |
| Rosemead Properties Group Ltd | Construction | 2022 |
| Roseridge Consulting Limited | Professional & scientific | 2017 |
| Ross & Co (Agency) Limited | Real estate | 2006 |
| Ross Grace Limited | Administrative & support | 2016 |
| Ross Thompson Project Management Limited | Professional & scientific | 2019 |
| Rossb Limited | Financial services | 2022 |
| Rossetti Gardens Management (Sussex) Limited | Households | 2016 |
| Rotycin Limited | Professional & scientific | 2020 |
| Roundabout Property Holdings Limited | Financial services | 2020 |
| Rouse Sharp Ltd | Construction | 2025 |
| Roveries Management Company Limited | Households | 2018 |
| Rowans Grand Ave.Residents Association Limited(The) | Households | 1964 |
| Rowkernowservices Ltd | Professional & scientific | 2025 |
| ROY & Co. Ltd | Real estate | 2024 |
| Roylux Limited | Wholesale & retail | 2023 |
| Royson Limited | Professional & scientific | 2019 |
| RPG Delivery Ltd | Transport & logistics | 2014 |
| RR & Partners Ltd | Professional & scientific | 2023 |
| RR Partnership Limited | Administrative & support | 2010 |
| RR Securities Limited | Financial services | 2009 |
| RS Corporate Ltd | Wholesale & retail | 2013 |
| RS Property Building Ltd | Construction | 2025 |
| Rsba Technology Limited | Information & communication | 2009 |
| Rsec Propco Ltd | Real estate | 2026 |
| Rstb Properties Ltd | Real estate | 2023 |
| RT Cruse Accountancy Services Limited | Professional & scientific | 2017 |
| RT Group Ltd | Transport & logistics | 2024 |
| RTS Electrical Services Ltd | Construction | 2021 |
| Ruby Equine Consulting Ltd | Information & communication | 2019 |
| RUDRA24 Ltd | Real estate | 2020 |
| Rumon Services Limited | Administrative & support | 1974 |
| Runway Apprenticeships Limited | Professional & scientific | 2014 |
| Runway Holdco Limited | Financial services | 2023 |
| Rupsha Limited | Hospitality | 2026 |
| Rural ZED Limited | Professional & scientific | 2008 |
| Russell House Properties Limited | Real estate | 2019 |
| Rustington Homes Ltd | Real estate | 2020 |
| Rutland House Freehold Limited | Households | 2023 |
| RVA by Rhianna Ltd | Administrative & support | 2026 |
| Ryecroft Place Management Association Limited | Real estate | 1994 |
| Ryecross Enterprises Limited | Wholesale & retail | 2000 |
| Ryeen Ltd | Construction | 2020 |
| Rytick Limited | Education | 2023 |
| S & B Mechanical Ltd | Construction | 2025 |
| S & J Properties Ltd | Real estate | 2024 |
| S & L Jaya Investments Ltd | Real estate | 2024 |
| S Brown Consulting Ltd | Administrative & support | 2026 |
| S Caruso Limited | Administrative & support | 2003 |
| S Clean Ltd | Administrative & support | 2024 |
| S D Bailey Limited | Construction | 2022 |
| S D Borley Building Contractors Limited | Construction | 2007 |
| S Designs Limited | Professional & scientific | 2022 |
| S J Pettitt Property Services Ltd | Construction | 2016 |
| S S Consulting Engineers Ltd | Construction | 2018 |
| S&L Consilium Ltd. | Information & communication | 2012 |
| S&R Labs Limited | Health & social care | 2026 |
| S&Z Service Limited | Administrative & support | 2016 |
| S.D.K. Carpentry Limited | Construction | 2003 |