| Re-Ly Lettings Ltd | Real estate | 2023 |
| Ready Doctors Ltd | Health & social care | 2012 |
| Reah Luxe Collective Ltd | Wholesale & retail | 2026 |
| Real Inbound Digital Ltd | Professional & scientific | 2019 |
| Reality Renovations Limited | Construction | 2017 |
| Rebel Industrial Cleaning Ltd | Administrative & support | 2025 |
| Red Dosa Ltd | Hospitality | 2017 |
| Red Dragon Sports Marketing Ltd | Professional & scientific | 2020 |
| Red Filter Consulting Limited | Professional & scientific | 2020 |
| Red Forest Retreats Limited | Hospitality | 2026 |
| Red Hill Care Home Ventures Ltd | Health & social care | 2013 |
| Red Hill Coffee Ltd | Manufacturing | 2024 |
| Red Holidays Ltd | Administrative & support | 2025 |
| Redbook Business Services Ltd | Administrative & support | 2012 |
| Redbook Taxation Services Limited | Financial services | 2023 |
| Redcare 2021 Ltd | Health & social care | 2021 |
| Redefined by GD Medical Aesthetics Ltd | Health & social care | 2025 |
| Redhill Information Technology Limited | Information & communication | 2013 |
| Redhill Lettings Limited | Real estate | 2024 |
| Redlands Aggregates Limited | Wholesale & retail | 2004 |
| Redlands Property Investments Limited | Professional & scientific | 1989 |
| Redwood Landscapes Southwest Ltd | Administrative & support | 2025 |
| Reel Time Couriers Ltd | Transport & logistics | 2026 |
| Reemaq Auto Ltd | Wholesale & retail | 2025 |
| Rees Diamonds Limited | Wholesale & retail | 2025 |
| Rees Installations Ltd | Construction | 2021 |
| Refreshed Developments Ltd | Construction | 2020 |
| Regen Electricals Limited | Manufacturing | 2020 |
| Regenerative Essence Limited | Manufacturing | 2019 |
| REI Wind UK Limited | Manufacturing | 2026 |
| Rejar Ltd | Construction | 2025 |
| Reko Contractors Ltd | Construction | 2024 |
| Reliable Contracting Solutions Limited | Professional & scientific | 2016 |
| Reliance Service Solutions Ltd | Administrative & support | 2018 |
| Relixmd Limited | Wholesale & retail | 2024 |
| Reminisce Homeware & Gifts Ltd | Administrative & support | 2016 |
| Remoo Limited | Information & communication | 2017 |
| Renewable Facilities Management Services Ltd | Professional & scientific | 2022 |
| Renrg Ltd | Professional & scientific | 2025 |
| Resilient Futures Coach Ltd | Public administration | 2024 |
| Resolven Building Blocks | Health & social care | 2002 |
| Resolven Garage Services Ltd. | Wholesale & retail | 2004 |
| Resolven Recovery Ltd | Wholesale & retail | 2025 |
| Resolven Rugby & Cricket Club Limited | Arts & recreation | 2012 |
| Resolven Storage Ltd | Transport & logistics | 2018 |
| Rest Relax Relief Limited | Administrative & support | 2007 |
| Restore & Develop UK Ltd | Construction | 2016 |
| Revive WC Ltd | Other services | 2025 |
| Revive Wellness Holdings Ltd | Financial services | 2023 |
| RGJ Alami Property Investments Ltd | Real estate | 2025 |
| RH Revamps Ltd | Construction | 2022 |
| Rheola Estates Limited | Real estate | 2011 |
| Richard Craig Davies Limited | Transport & logistics | 2009 |
| Richard Davies Design and Developments Ltd | Construction | 2019 |
| Richard Keen (Insurance Brokers) Limited | Financial services | 1978 |
| Richard Morgan (Contractors) Ltd. | Construction | 1996 |
| Richard Smith Consultancy Ltd | Health & social care | 2024 |
| Richards Coal Merchants Limited | Wholesale & retail | 1981 |
| Richards Dwellings Ltd | Real estate | 2019 |
| Ridgewood Associates Limited | Professional & scientific | 2002 |
| Rigby Construction Ltd | Construction | 2018 |
| Rigby Power Services Limited | Construction | 2024 |
| Riksaholdings Limited | Real estate | 2025 |
| Ring O Rosie Ltd | Wholesale & retail | 2020 |
| Rise Capital Ventures Limited | Financial services | 2024 |
| Rise E.M.O Holdings Limited | Financial services | 2025 |
| Rise Property Lettings Limited | Real estate | 2026 |
| Rjallen Renovations & Property Ltd | Construction | 2025 |
| RJR Consult Limited | Professional & scientific | 2009 |
| RK Wales Property Management Limited | Construction | 2023 |
| RLF Services Limited | Construction | 2017 |
| Roast Masters Neath Limited | Hospitality | 2025 |
| ROB Hearne Consulting Ltd | Professional & scientific | 2014 |
| Robert LEE Holland Ltd | Construction | 2019 |
| Rogers Bricklaying Contractors Ltd | Construction | 2014 |
| Rolling King Limited | Wholesale & retail | 2004 |
| Roma Retailer Ltd | Wholesale & retail | 2025 |
| Roof IT and More Ltd | Construction | 2025 |
| Roofing Co Solutions Ltd | Construction | 2026 |
| Rose Barbershop Ltd | Other services | 2026 |
| Rose Cotterill Lettings Ltd | Hospitality | 2018 |
| Rosewood Harlow Estates Ltd | Real estate | 2025 |
| RPW Consultancy Limited | Information & communication | 2015 |
| RRT Developments Ltd | Real estate | 2020 |
| RT Accountancy & Business Services Limited | Professional & scientific | 2026 |
| RTL Electrical Group Ltd | Construction | 2025 |
| Rugby Relics Ltd | Wholesale & retail | 2002 |
| Runa Solutions Ltd | Health & social care | 2024 |
| Ruperts Coffee Co. Ltd | Hospitality | 2020 |
| Rushton Plumbing Heating & GAS Limited | Construction | 2023 |
| RWK Holdings Ltd | Real estate | 2022 |
| RWT Carpentry Services Limited | Manufacturing | 2018 |
| S & a Homes & Property Ltd | Real estate | 2025 |
| S & a Scaffolding Services Limited | Construction | 2015 |
| S & L Infinite Home Improvement Ltd | Construction | 2021 |
| S & R Properties Crynant Limited | Real estate | 2023 |
| S & R Tradelink (UK) Limited | Wholesale & retail | 2003 |
| S & R Tradelink Limited | Wholesale & retail | 1988 |
| S C H M Properties Ltd | Construction | 2022 |
| S Drurys Limited | Real estate | 2008 |