| REX Group Services Limited | Construction | 1980 |
| Rexuk Ltd | Administrative & support | 2025 |
| Reynolds Associates CBS Limited | Professional & scientific | 2013 |
| Reynolds Associates Holdings Limited | Financial services | 2025 |
| Reyt Bluesy Ltd | Hospitality | 2020 |
| Reyt Good Catering Ltd | Hospitality | 2023 |
| Reyt Good Entertainment Limited | Professional & scientific | 2019 |
| Reyt Good Maltby Ltd | Professional & scientific | 2024 |
| Reyt Good Rooms Ltd | Real estate | 2023 |
| Reyt Good Ventures Ltd. | Hospitality | 2019 |
| Reyt Learn Limited | Information & communication | 2023 |
| Reyt Limited | Information & communication | 2020 |
| Reyt Pizza Limited | Hospitality | 2022 |
| Reyt Properties Limited | Real estate | 2026 |
| Reyt Repair C.I.C. | Other services | 2022 |
| Reyt Shot Golf Ltd | Professional & scientific | 2022 |
| Rezai Scott Ltd | Real estate | 2022 |
| Rezero Consulting Ltd | Information & communication | 2018 |
| RF Puchalka Investments Limited | Financial services | 2026 |
| RFC Solutions Limited | Information & communication | 2014 |
| RFM Supported Living Services Ltd | Hospitality | 2023 |
| Rfsr Fire Risk Safety Ltd | Public administration | 2025 |
| Rftechnics Ltd | Professional & scientific | 2003 |
| RG & AJ Property Ltd | Real estate | 2021 |
| RG Building Ltd | Construction | 2024 |
| Rg-Psv Maintenance & Management Assistance Ltd | Wholesale & retail | 2019 |
| RGA Properties Limited | Real estate | 2017 |
| Rgal Ltd | Extraterritorial | 2025 |
| RGB Code Ltd | Information & communication | 2019 |
| RGB Consulting Limited | Professional & scientific | 2009 |
| RGB Haus Limited | Information & communication | 2013 |
| RGB Research (Holdings) Limited | Financial services | 2014 |
| RGB Research Limited | Professional & scientific | 1998 |
| RGN Services Limited | Other services | 2003 |
| RGR Construction Limited | Construction | 2009 |
| RGS UK Holdings Limited | Financial services | 2021 |
| RGV Investments Ltd | Real estate | 2021 |
| RGW Construction Ltd | Construction | 2026 |
| RH Accountancy Limited | Extraterritorial | 2017 |
| RH Financial Group Limited | Financial services | 2018 |
| RH IT and Security Ltd | Wholesale & retail | 2013 |
| RH Tanker Services Ltd | Administrative & support | 2023 |
| RH View Ltd | Administrative & support | 2020 |
| Rhado Limited | Professional & scientific | 2020 |
| Rhawproperties Ltd | Administrative & support | 2025 |
| RHB Wealth Ltd | Financial services | 2023 |
| Rhees Beauty Bar Ltd | Other services | 2024 |
| RHG Property Ltd | Real estate | 2022 |
| Rhino Logistex Ltd | Transport & logistics | 2017 |
| RHJ Accountants Limited | Professional & scientific | 2013 |
| RHJ Consulting Limited | Information & communication | 2015 |
| RHJ Consulting Services Ltd | Professional & scientific | 2015 |
| RHJ Group Ltd | Other services | 2016 |
| RHJ Law UK LLC Ltd | Professional & scientific | 2020 |
| RHJ Property Management Ltd | Real estate | 2020 |
| RHJ Travel Services Ltd | Transport & logistics | 2017 |
| RHM Hair Ltd | Other services | 2026 |
| RHO Technologies Ltd | Information & communication | 2022 |
| Rhodata Ltd | Information & communication | 2018 |
| Rhodean Ltd | Hospitality | 2021 |
| Rhodes Clarke & Co Limited | Professional & scientific | 2012 |
| Rhodes Environmental Services Limited | Water & waste | 2019 |
| Rhodesk Ltd | Administrative & support | 2018 |
| Rhonan Black Ltd | Hospitality | 2024 |
| Rhose Jewellery Ltd | Wholesale & retail | 2023 |
| RHQ Property Limited | Real estate | 2021 |
| Rhubarb and Rhyme Ltd | Hospitality | 2024 |
| Rhubarb Catering Limited | Hospitality | 2021 |
| Rhys Hinton Personal Training Ltd | Education | 2024 |
| Rian James Consulting Ltd | Professional & scientific | 2024 |
| Riaz Hearing Care Ltd | Wholesale & retail | 2022 |
| Riaz Prime Properties Ltd | Real estate | 2025 |
| RIB Marketing & Design Ltd | Professional & scientific | 2011 |
| Ribble View Health Care Limited | Health & social care | 2018 |
| Rice & Gold Limited | Arts & recreation | 2021 |
| Rich Brickwork Ltd | Construction | 2024 |
| Rich Electrics and Renewables Limited | Construction | 2024 |
| Rich Property Mgmt Limited | Real estate | 2024 |
| Rich Tone Music Ltd | Wholesale & retail | 2004 |
| Richard Beasley Decorations Ltd | Construction | 2023 |
| Richard Brundish Consultancy Ltd | Professional & scientific | 2008 |
| Richard Cooke Engineering Steels Holdings Ltd | Financial services | 2011 |
| Richard Cooke Engineering Steels Limited | Manufacturing | 1988 |
| Richard Crawshaw Golf Limited | Education | 2021 |
| Richard Dean Ltd | Construction | 2002 |
| Richard Ferguson Puchalka Wealth Management Limited | Administrative & support | 2022 |
| Richard Fletcher (Metals) Limited | Wholesale & retail | 1986 |
| Richard Fletcher Cost Consultancy Ltd | Professional & scientific | 2021 |
| Richard Gregory Golf Ltd | Arts & recreation | 2016 |
| Richard Nield Consulting Ltd | Professional & scientific | 2025 |
| Richard White & SON (Forestry) Ltd | Agriculture & fishing | 2009 |
| Richards Consultancy & Projects Limited | Construction | 2019 |
| Richardson & Buckley Limited | Real estate | 1946 |
| Richardson Brothers Developments Ltd | Construction | 2019 |
| Richardson Builders Limited | Construction | 1997 |
| Richardson Timber Services Limited | Construction | 2010 |
| Richardsons DO IT Yourself Limited | Wholesale & retail | 2012 |
| Richer Retirement Limited | Information & communication | 2012 |
| Richmond Dental Care Limited | Health & social care | 2013 |
| Richmond Electrical Contractors Ltd | Construction | 2018 |