| Rishi Vegetable Ltd | Wholesale & retail | 2014 |
| Rishta Limited | Other services | 2023 |
| Riska Training & Consultancy Ltd | Education | 2023 |
| Rissing.Crust Limited | Wholesale & retail | 2026 |
| Risus Cura Limited | Health & social care | 2018 |
| Rita Clearance Ltd | Transport & logistics | 2022 |
| Ritchie Rich Ltd | Professional & scientific | 2025 |
| Ritz Party Shop 2010 Limited | Wholesale & retail | 2010 |
| River Graphics Limited | Wholesale & retail | 1996 |
| River Nile Trading Limited | Wholesale & retail | 2016 |
| Riverair Ltd. Ltd | Manufacturing | 2025 |
| Rivers for Women CIC | Information & communication | 2015 |
| Rivside Limited | Information & communication | 2016 |
| Riya Gardening & Collection Ltd | Administrative & support | 2025 |
| Rizglow Ltd | Other services | 2025 |
| RJ Mobile Tyres Ltd | Wholesale & retail | 2023 |
| Rjbinstalls Ltd. | Construction | 2024 |
| RJC Plumbing Services Limited | Construction | 2025 |
| RJO Media Ltd | Wholesale & retail | 2023 |
| RJP Meats Ltd | Wholesale & retail | 2019 |
| RJR Waste Clearance Ltd | Water & waste | 2024 |
| RK Alpha Group Ltd | Real estate | 2023 |
| RK Cars Crawley Ltd | Transport & logistics | 2025 |
| RK Fleet Ltd | Transport & logistics | 2025 |
| RK Harrison Limited | Professional & scientific | 2026 |
| RK Management Ltd | Real estate | 2025 |
| RKS & AZL Limited | Hospitality | 2026 |
| RKV Consulting Ltd | Administrative & support | 2023 |
| Rlka Ltd | Professional & scientific | 2024 |
| RLR Leadwork & Roofing Limited | Construction | 2025 |
| RM Developments (GH) Limited | Construction | 2017 |
| RMA Solutions Ltd | Information & communication | 2020 |
| RMC Drainage Ltd | Water & waste | 2024 |
| Rmjpi Accountancy Ltd | Professional & scientific | 2014 |
| Rmjpi Consulting Limited | Other services | 2018 |
| Rmjpi Dignity Care Ltd | Health & social care | 2022 |
| Rmjpi London Business Academy Ltd | Education | 2015 |
| RML GB Limited | Real estate | 2004 |
| Rncc Ltd | Professional & scientific | 2023 |
| RNG Technical Limited | Professional & scientific | 2021 |
| RNH Consulting Limited | Wholesale & retail | 2022 |
| RNS Spices Ltd | Wholesale & retail | 2025 |
| RO Aviation Ltd. | Administrative & support | 2020 |
| Road Link Gatwick Ltd | Administrative & support | 2017 |
| Road Ready Tyres UK Ltd | Wholesale & retail | 2026 |
| Road Runners Meco Ltd | Transport & logistics | 2013 |
| Roadlink Logistics Ltd | Transport & logistics | 2025 |
| Roadrunners Accident Repairs Limited | Wholesale & retail | 2026 |
| Roadside Flat Tyre Ltd | Wholesale & retail | 2026 |
| Roadstar Commercial Tyres Ltd | Wholesale & retail | 2025 |
| Robert Edward Ford Ltd | Real estate | 2023 |
| Robert Jessep & Partners Limited | Financial services | 2012 |
| Robertson (UK) Limited | Professional & scientific | 1995 |
| Robertson Geospec International Limited | Professional & scientific | 1998 |
| Robin Cars Ltd | Transport & logistics | 2022 |
| Robstoc Limited | Transport & logistics | 2015 |
| Robur Word Group Limited | Professional & scientific | 2018 |
| Robur Word Limited | Administrative & support | 2018 |
| ROC Holdings (EOT) Trustee Limited | Administrative & support | 2024 |
| ROC Holdings Limited | Financial services | 2023 |
| ROC Investments Limited | Financial services | 2024 |
| ROC Solutions Limited | Construction | 2015 |
| ROC UK Group Limited | Financial services | 2018 |
| Rock Cover Services Limited | Financial services | 2010 |
| Rock Insurance Services Limited | Financial services | 2001 |
| Rock Services Holdings Limited | Professional & scientific | 2016 |
| Rockpier Ltd | Financial services | 2021 |
| Roclips UK Ltd | Manufacturing | 2017 |
| Rocmep Limited | Construction | 2004 |
| Rodriguez UK Logistics Ltd | Transport & logistics | 2019 |
| Roganr Limited | Health & social care | 2020 |
| Rogers (U.K.) Limited | Wholesale & retail | 1976 |
| Rokas Interiors Ltd | Manufacturing | 2026 |
| Roko Steelfixing Ltd | Construction | 2025 |
| Roland Hivart Services Limited | Construction | 2015 |
| ROLLER53 Limited | Manufacturing | 2013 |
| Romans Handyman Services Ltd | Construction | 2020 |
| Ronin Consulting Limited | Professional & scientific | 2005 |
| Ronix Services Limited | Transport & logistics | 2024 |
| Ronx Projects Limited | Real estate | 2024 |
| Roof Units Limited | Manufacturing | 1971 |
| Roofing and Waterproofing Test Association Ltd | Other services | 2018 |
| Roofing Mart Ltd | Construction | 2024 |
| ROOT4KIDS Theatre Ltd | Education | 2011 |
| Roots & Rhythm Studio C.I.C. | Other services | 2026 |
| Rooyal Decoration Limited | Wholesale & retail | 2024 |
| Ropeone Access Ltd | Construction | 2026 |
| Rose and Thistle Mechanical Ltd | Construction | 2025 |
| Rose River Therapy Limited | Health & social care | 2022 |
| Rosebank Dental Practice Limited | Health & social care | 2011 |
| Roses Hair & Beauty Ltd | Other services | 2024 |
| Rosewood Facilities Ltd | Administrative & support | 2014 |
| Rosewood Music Ltd | Other services | 2017 |
| Roslin Consultancy Ltd | Other services | 2018 |
| Ross Parcel Distribution Ltd | Transport & logistics | 2025 |
| Rossbay Limited | Professional & scientific | 1973 |
| Rotyga Company Ltd | Wholesale & retail | 2021 |
| Round the Clock Cleaning Services Limited | Administrative & support | 2024 |
| Round the Clock Security Services Limited | Administrative & support | 2024 |
| Roundway Court Management Company Limited | Households | 1994 |