| Real Deal Stock Outlet Limited | Wholesale & retail | 2026 |
| Real Healthcare Solutions Ltd | Health & social care | 2011 |
| REALFLEXPROPERTY2021 Limited | Real estate | 2021 |
| Rebecca Cosgrove Ltd | Professional & scientific | 2021 |
| Recall.Uk Limited | Administrative & support | 2008 |
| Reception Furniture Insitu Limited | Construction | 2014 |
| Red 7 Services Ltd | Information & communication | 2020 |
| Red Beard Lighting Ltd | Other services | 2015 |
| Red Cardinal Consulting Limited | Professional & scientific | 2020 |
| Red Cardinal Limited | Real estate | 2017 |
| Red Dragon Corporate Consultants Limited | Professional & scientific | 2013 |
| Red Dragon Property Developments Limited | Construction | 2013 |
| Red Dragon Waste Limited | Water & waste | 2011 |
| Red FIN Music Ltd | Information & communication | 1995 |
| Red Lion (Hartford) Ltd | Hospitality | 2014 |
| Red Lion Prints Posters Maps and Atlases Ltd | Information & communication | 2005 |
| Red MAN Enterprises Ltd | Health & social care | 2020 |
| Red Solo Club Ltd | Information & communication | 2023 |
| Red Viking Media Limited | Information & communication | 2012 |
| Redcot Management Company Limited | Professional & scientific | 2023 |
| Redford-Allen Group Ltd | Wholesale & retail | 2025 |
| Redsnipe Ltd | Information & communication | 2012 |
| Redtop IT Services Ltd | Information & communication | 2003 |
| Redway Travel Ltd | Transport & logistics | 2012 |
| Reeltime Applications Ltd | Arts & recreation | 2026 |
| Refine Finishes Co. Ltd | Construction | 2025 |
| Reframe Brands Ltd | Wholesale & retail | 2021 |
| Reimagined Industries Limited | Information & communication | 2020 |
| Rejuvenate Gym Ltd | Arts & recreation | 2018 |
| Reke Hand Car Wash Ltd | Administrative & support | 2024 |
| Relax Bathrooms Limited | Construction | 2024 |
| Relish Partnership Limited | Hospitality | 2008 |
| REM Hillback Limited | Other services | 2003 |
| Remedi 26 Ltd | Health & social care | 2022 |
| Remediated Estates LP | | 2008 |
| Remianmowi Limited | Hospitality | 2025 |
| Remplan Limited | Extraterritorial | 2018 |
| Renaii Interiors Ltd | Construction | 2024 |
| Rendr Records Limited | Information & communication | 2018 |
| Rene Power Marketing Ltd | Professional & scientific | 2023 |
| Renew Electrical Limited | Construction | 2015 |
| Rengen Ltd | Wholesale & retail | 2019 |
| Renovate and Regenerate Ltd | Real estate | 2023 |
| Renovations of Cheshire Ltd | Construction | 2023 |
| Rentrad Limited | Professional & scientific | 2025 |
| Report Support Limited | Financial services | 2012 |
| Residential Survey Group Ltd | Professional & scientific | 2026 |
| Resinhs Holdings Limited | Extraterritorial | 2023 |
| Resonate Financial Planning Ltd. | Financial services | 2017 |
| RESPOND2PRESSURE Limited | Health & social care | 2015 |
| Response MRI Shielding and Maintenance Limited | Manufacturing | 2021 |
| Rev&Riss Ltd | Professional & scientific | 2025 |
| Revenge Boxing Ltd | Arts & recreation | 2022 |
| Revival HR Ltd | Professional & scientific | 2021 |
| REX Club Limited | Wholesale & retail | 2013 |
| Reya Property Ltd | Real estate | 2026 |
| Reynard Enterprises Ltd | Administrative & support | 2004 |
| Reynolds Superstores Limited | Real estate | 1964 |
| Rgpd Services Ltd | Professional & scientific | 2017 |
| RH Services (Automotive) Ltd | Manufacturing | 2018 |
| RHI Squared Limited | Hospitality | 2016 |
| RHI Transport Ltd | Transport & logistics | 2018 |
| Rhys Jones & Co Ltd | Wholesale & retail | 2019 |
| RI Building Surveying Ltd | Construction | 2023 |
| Ribpointpro Ltd | Education | 2025 |
| RIC Burgess Consulting Ltd | Professional & scientific | 2025 |
| Richard Wilcox Designs Ltd | Professional & scientific | 2022 |
| Richard Young Ltd | Education | 2023 |
| Richardson & Doyle Ltd | Information & communication | 2024 |
| Rida Enterprises Ltd | Professional & scientific | 2013 |
| Rigazio Logistics Limited | Transport & logistics | 2015 |
| Rigby & Company Limited | Extraterritorial | 2010 |
| Rigel Tech Ltd | Information & communication | 2026 |
| Riley Services Group Ltd | Professional & scientific | 2024 |
| Ripple Developments (UK) Limited | Arts & recreation | 2003 |
| Rising Rich Limited | Hospitality | 2026 |
| River Garden Bar Ltd | Hospitality | 2024 |
| Riverside Bespoke Interiors Ltd | Construction | 2011 |
| Riverside Financial Holdings Ltd | Wholesale & retail | 2022 |
| Riverside Financial Ltd | Wholesale & retail | 2019 |
| Riverside Vehicle Sales Ltd | Wholesale & retail | 2022 |
| Riviera Holdings Limited | Real estate | 2017 |
| RJC Environmental Installations Ltd | Construction | 2024 |
| Rjkm Property Ltd | Real estate | 2023 |
| RJL Recruitment Limited | Professional & scientific | 2020 |
| RJT Developments Limited | Construction | 2024 |
| RLC Healthcare Limited | Administrative & support | 2016 |
| RMB Career Consulting Ltd | Professional & scientific | 2017 |
| Rmbt Projects Ltd | Professional & scientific | 2025 |
| Road Two Group Ltd | Wholesale & retail | 2024 |
| ROB Archer Associates Limited | Administrative & support | 2020 |
| Robert Mcmillan Electrical Ltd | Construction | 2016 |
| Rockdrill Ltd | Wholesale & retail | 2016 |
| Rockfort Homes Ltd | Real estate | 2023 |
| Rocs Property Ltd | Construction | 2026 |
| ROE Foundations Limited | Construction | 1991 |
| Rogers Building Ltd | Other services | 2025 |
| Rogersons Builders Limited | Construction | 2014 |
| Roho Systems Limited | Manufacturing | 2021 |
| Rojac (UK) Limited | Water & waste | 2006 |