| Retrail Ltd | Wholesale & retail | 2025 |
| Retro Synergy Ltd | Professional & scientific | 2024 |
| Retroserve Ltd | Construction | 2021 |
| Rettihsehtpu Limited | Administrative & support | 2006 |
| Return to Performance Ltd | Other services | 2025 |
| Reuben & Clare Healthcare Services Limited | Health & social care | 2015 |
| Revenad Limited | Information & communication | 2025 |
| Revenge Hair Studio Limited | Other services | 1999 |
| Revere Design Ltd | Professional & scientific | 2023 |
| Revicon Solutions Limited | Professional & scientific | 2024 |
| Revitalise YOU Aesthetics and Skin Ltd | Other services | 2023 |
| Revitalyze Ltd | Health & social care | 2021 |
| Revival Holdings & Services Ltd | Real estate | 2026 |
| Revive & Refurb Ltd | Hospitality | 2025 |
| Revive Aesthetics Clinic Ltd | Other services | 2024 |
| Revive Chandelier Specialists Ltd | Other services | 2023 |
| Revive Healthy Living | Health & social care | 2005 |
| Revive Management Services Limited | Real estate | 2005 |
| Revived by EM Limited | Other services | 2024 |
| Rewellbeing Ltd | Health & social care | 2017 |
| Rewleywood Ltd | Real estate | 2026 |
| Reworked 348 Ltd | Wholesale & retail | 2019 |
| Rewrite Medical Limited | Professional & scientific | 2025 |
| REX Box Lets Ltd | Real estate | 2025 |
| REX Elias Limited | Real estate | 2023 |
| REX Wealth Management Limited | Financial services | 2022 |
| Rexent Ltd | Health & social care | 2026 |
| Rexhill Limited | Construction | 2020 |
| Reynolds & Co Accounting Limited | Professional & scientific | 2016 |
| Reyshiv Limited | Real estate | 2021 |
| RF Project Engineering Limited | Construction | 2018 |
| RF Ruminant Feeds Ltd | Agriculture & fishing | 2026 |
| RF SON Ltd | Information & communication | 2022 |
| RF Training & Transport Management Limited | Transport & logistics | 2016 |
| Rf&Wr Investments Limited | Real estate | 2022 |
| RG Corporate Ltd | Wholesale & retail | 2025 |
| RG Online Ltd | Hospitality | 2022 |
| RG Quality Driving Ltd | Transport & logistics | 2018 |
| RG Services Midlands Limited | Construction | 2020 |
| RG TVS Limited | Wholesale & retail | 2025 |
| RG41 Property Ltd | Real estate | 2025 |
| RGC Financial Consulting Ltd | Financial services | 2026 |
| Rgis Tech Services Limited | Professional & scientific | 2016 |
| RGL Universal Construction Ltd | Professional & scientific | 2019 |
| RGM15 (Bridge) Limited | Construction | 2023 |
| RGM15 (Bright) Limited | Construction | 2023 |
| RGM15 (Brightmoor) Holdings Limited | Financial services | 2023 |
| RGM15 Limited | Real estate | 2021 |
| RGP Estates Limited | Real estate | 2011 |
| RGS Software Limited | Information & communication | 2018 |
| RGT Group Limited | Construction | 2025 |
| RGX Haulage Ltd | Transport & logistics | 2026 |
| RH Dream Home Ltd | Construction | 2023 |
| RHC Brickwork Limited | Construction | 2022 |
| RHC Technology Consultants Limited | Information & communication | 2015 |
| Rheum Care Ltd | Health & social care | 2025 |
| Rheumatology Consult Ltd | Health & social care | 2022 |
| Rhino Entertainment Ltd | Hospitality | 2024 |
| Rhinvesting Ltd | Wholesale & retail | 2023 |
| Rhminegeo.Tech Ltd | Mining & quarrying | 2024 |
| RHP Architecture Limited | Professional & scientific | 2026 |
| RHT Solutions Limited | Professional & scientific | 2015 |
| Rhubarb Holdings Limited | Real estate | 2017 |
| Rhubarb Music Ltd | Information & communication | 2013 |
| Rhyme & Glue Limited | Professional & scientific | 2025 |
| Rhys Diaz Tech Ltd | Information & communication | 2018 |
| Ri-Mark Ltd | Wholesale & retail | 2025 |
| Riastrad Limited | Real estate | 2020 |
| Riaz Haulage Limited | Transport & logistics | 2022 |
| Riber Conservatory Roofs and Double Glazing Limited | Construction | 2017 |
| Riber Pets Limited | Wholesale & retail | 2021 |
| Riber Property Co.Limited | Real estate | 1970 |
| Ricardo Trans Limited | Transport & logistics | 2025 |
| Rich C-B Ltd | Information & communication | 2018 |
| Rich Jones Tech Consulting Ltd | Information & communication | 2025 |
| Rich MX Ltd | Professional & scientific | 2017 |
| Rich Seller Associates Ltd | Information & communication | 2018 |
| Richa Gupta Ltd | Real estate | 2011 |
| Richard Aston Limited | Financial services | 2014 |
| Richard Carroll Ltd | Professional & scientific | 2013 |
| Richard Edwin James Butler Mortgages Limited | Financial services | 2018 |
| Richard Lang & SON Limited | Wholesale & retail | 1988 |
| Richard Morris Associates Limited | Professional & scientific | 2003 |
| Richard Osbiston Builders Limited | Construction | 2015 |
| Richard Petrie Optometrists Ltd | Health & social care | 2014 |
| Richard Southall Limited | Wholesale & retail | 2014 |
| Richard Stone Jewellers Limited | Manufacturing | 2004 |
| Richard Toone Ltd | Professional & scientific | 2020 |
| Richard Turner Martial Arts Ltd | Arts & recreation | 2022 |
| Richard Winter Limited | Professional & scientific | 2013 |
| Richardson & Linnell Properties LLP | | 2025 |
| Richardson Family Investments Ltd | Financial services | 2024 |
| Richardson Hall Properties Limited | Real estate | 1985 |
| Richardson Property Developers Ltd | Real estate | 2025 |
| Richmand House Residential Home Limited | Professional & scientific | 2000 |
| Richmond Property Management (London) Limited | Real estate | 2026 |
| Richmondshire Technology Limited | Information & communication | 1991 |
| Richnova Medical Supplies Ltd. | Wholesale & retail | 2025 |
| Ricnik Limited | Construction | 2025 |
| Ricoh Solutions Limited | Professional & scientific | 2016 |