| Reffer Limited | Wholesale & retail | 2024 |
| Refined Lettings Limited | Real estate | 2026 |
| Refinednest Ltd | Construction | 2025 |
| Reflection Records Ltd | Information & communication | 2025 |
| Refurnish-Uk Ltd | Administrative & support | 2026 |
| Regency Automotive Limited | Wholesale & retail | 2025 |
| Regico Limited | Professional & scientific | 2013 |
| Reine D'Amour Holdings Limited | Financial services | 2023 |
| Reine D'Amour Limited | Manufacturing | 2010 |
| Remap Mental Fitness Ltd | Other services | 2022 |
| Remuneration Consultants Group Limited | Professional & scientific | 2011 |
| Renee Financials Limited | Professional & scientific | 2013 |
| Renmis Ltd | Professional & scientific | 2023 |
| Repag Ltd | Construction | 2020 |
| Repentee Limited | Wholesale & retail | 2025 |
| Repton Trustees Limited | Professional & scientific | 2021 |
| Rescom Property Investment Limited | Real estate | 2014 |
| Resi Solutions Property Limited | Construction | 2022 |
| Resolve Project Solutions Limited | Professional & scientific | 2025 |
| Resurgam Technical Services Limited | Information & communication | 2024 |
| Reva Care Limited | Health & social care | 2022 |
| RFA2 Limited | Financial services | 2015 |
| RFA3 Limited | Financial services | 2019 |
| RFS Ingleby Ltd | Financial services | 2019 |
| RGQ Services Limited | Professional & scientific | 2005 |
| Rhizome Business Services Limited | Administrative & support | 2026 |
| Rhlp Investments Limited | Administrative & support | 2024 |
| Richman Gold Group Incorporated Ltd | Wholesale & retail | 2019 |
| Riddlesdown SSB (1) Ltd | Real estate | 2022 |
| Rift Valley Investments Limited | Real estate | 2022 |
| Rimi Trading Limited | Wholesale & retail | 2020 |
| Rinas Creative Styles Ltd | Other services | 2023 |
| Ringrose Associates Limited | Professional & scientific | 2017 |
| Ringshall Aerospace Ltd | Professional & scientific | 2025 |
| Riopan Ltd | Other services | 2021 |
| Rise and Grind Cafe Altrincham Limited | Hospitality | 2026 |
| Rishi Sachania Ltd | Other services | 2022 |
| River AI Ltd | Professional & scientific | 2025 |
| Rivercem International Ltd | Wholesale & retail | 2025 |
| Riverpark Consulting Limited | Professional & scientific | 2024 |
| Riverside Developers Limited | Real estate | 2015 |
| Riverside Hair by Kate Ltd | Other services | 2025 |
| Rkcs Enterprise Ltd | Hospitality | 2022 |
| RKK Holding Limited | Financial services | 2026 |
| Rk’S Rubbish Removals Ltd | Water & waste | 2026 |
| RLX Accounting Limited | Professional & scientific | 2026 |
| RM Nayyer Ltd | Wholesale & retail | 2024 |
| RNJ Alternative Ltd | Real estate | 2022 |
| RNJ Care Limited | Health & social care | 2007 |
| RNJ Care Services Ltd | Health & social care | 2024 |
| RNJ Group Ltd | Health & social care | 2021 |
| Rns-Greenways Limited | Real estate | 2024 |
| Rnsvenus Limited | Real estate | 2024 |
| Road Grip Driver Training Ltd | Education | 2025 |
| Road to Mastery Ltd | Education | 2019 |
| Roamcore Ltd | Wholesale & retail | 2026 |
| Roamworthy Limited | Information & communication | 2026 |
| Roberto Manfredi Ltd | Information & communication | 2020 |
| Robin Rise Homes Ltd | Real estate | 2022 |
| Rocaka Software Consulting Limited | Information & communication | 2016 |
| Rock Hopper Services Limited | Administrative & support | 2024 |
| Rockley Dene Ltd | Professional & scientific | 2022 |
| Roderick Hodgson Ltd | Information & communication | 2016 |
| Rodewell Properties LLP | | 2010 |
| Roje Projects Ltd | Manufacturing | 2026 |
| Roko 316 Ltd | Wholesale & retail | 2003 |
| Role Consulting Limited | Professional & scientific | 2025 |
| Rolwak.Com Limited | Wholesale & retail | 2025 |
| Romi Holdings Limited | Other services | 2025 |
| Roofing & Building Solutions Ltd | Construction | 2020 |
| Rosemead (Norwich) Limited | Wholesale & retail | 2021 |
| Rosemead Holdings Limited | Wholesale & retail | 2021 |
| Rosemead Limited | Wholesale & retail | 2003 |
| Ross Haven Management Limited | Households | 1998 |
| Rowar Limited | Hospitality | 1977 |
| Roxstar Limited | Information & communication | 2013 |
| Royston FOX Associates Limited | Financial services | 2013 |
| RP Coaching Ltd | Health & social care | 2024 |
| Rpim Limited | Real estate | 2019 |
| Rray Holdings Ltd | Real estate | 2017 |
| RS London Estates Limited | Construction | 2012 |
| RS Property Consultancy Services Limited | Professional & scientific | 2019 |
| Rtex Limited | Wholesale & retail | 2026 |
| RTX Capital Limited | Information & communication | 2020 |
| Ruben Roland Ltd | Extraterritorial | 2015 |
| Ruby B Holdings Limited | Real estate | 2021 |
| Rudrascope Limited | Information & communication | 2021 |
| Russell Robbins Limited | Professional & scientific | 2023 |
| Russoff Industries Ltd | Information & communication | 2010 |
| RV5 Ltd | Construction | 2017 |
| Rvknightsbridge Limited | Financial services | 2011 |
| RVS Medical Services Ltd | Health & social care | 2022 |
| RYE Court Management (2011) Limited | Households | 2011 |
| Ryebond Limited | Real estate | 2003 |
| RZ Legal Ltd | Administrative & support | 2025 |
| S & E Artistry Ltd | Professional & scientific | 2026 |
| S Chadha Limited | Professional & scientific | 2019 |
| S FAM Estates Ltd | Real estate | 2026 |
| S K P Smithys Hotel Ltd | Hospitality | 2016 |
| S P Medics Limited | Health & social care | 2010 |