| Revs Driving Limited | Education | 2025 |
| Revue-Ai Ltd | Information & communication | 2025 |
| Rexofit Limited | Wholesale & retail | 2025 |
| Rexsy Properties Ltd | Real estate | 2024 |
| Rexton Investments Ltd | Construction | 2009 |
| Rezarta Limited | Real estate | 2024 |
| Rezia Collections Ltd | Wholesale & retail | 2025 |
| RF Consultancy Services Limited | Information & communication | 2026 |
| RF Flooring Solutions Ltd | Construction | 2023 |
| RGA Bucks Ltd | Arts & recreation | 2013 |
| RGL Surveys Ltd | Professional & scientific | 2011 |
| RH Roofing Services Ltd | Construction | 2025 |
| Rhea Anaesthetics Limited | Health & social care | 2021 |
| Rheas Associates Ltd | Professional & scientific | 2014 |
| Rhhl Solutions Ltd | Construction | 2016 |
| Rhiannon Online Limited | Wholesale & retail | 2024 |
| Rhino-Tech Services Ltd | Information & communication | 2025 |
| RHM Law Limited | Professional & scientific | 2024 |
| Rhodes of Paradise Limited | Hospitality | 2025 |
| RHR FL Limited | Households | 2023 |
| Rica Construction Ltd | Construction | 2022 |
| Riccus Pubs Limited | Hospitality | 2021 |
| Rich Innovations Limited | Administrative & support | 2001 |
| Rich Limited | Construction | 2018 |
| Rich UK Limited | Hospitality | 2002 |
| Richard Bates Limited | Other services | 2010 |
| Richard Martin Lighting Limited | Administrative & support | 2024 |
| Riches Construction Ltd | Construction | 2021 |
| Richie Value Limited | Professional & scientific | 2024 |
| Richings Autos LLP | | 2021 |
| Richland Accountants & Business Advisers Limited | Professional & scientific | 2018 |
| Richmate Ltd | Financial services | 2018 |
| Richmond Assets Limited | Construction | 2009 |
| Richmond Dance School Limited | Arts & recreation | 2009 |
| Rickard Property Services Ltd | Administrative & support | 2024 |
| Ridemaster Limited | Administrative & support | 2005 |
| Ridgway Electrical Ltd | Professional & scientific | 2023 |
| Ridgway Engineering Limited | Manufacturing | 2003 |
| Riding Mill Partnership Limited | Administrative & support | 2023 |
| Ridraw Investments Ltd | Real estate | 2021 |
| Right NOW Management Services Ltd | Administrative & support | 2026 |
| Rightcarforyou Ltd | Wholesale & retail | 2021 |
| Rightrail Limited | Construction | 2017 |
| Riley Brooks Ltd | Professional & scientific | 2019 |
| Riley Enterprisez Ltd | Real estate | 2025 |
| Riley Therapy & Training Ltd | Education | 2023 |
| Ringplus Ltd | Information & communication | 2024 |
| RIO Deli Limited | Hospitality | 2023 |
| Risha Raksha Ltd | Transport & logistics | 2018 |
| Risk Crew Limited | Information & communication | 2011 |
| Risk Ecosystems Ltd | Professional & scientific | 2017 |
| Risk Halt Ltd | Financial services | 2021 |
| Ritagi Ltd | Health & social care | 2014 |
| Riteline Roofing & Building Contractors Ltd | Construction | 2026 |
| Rival Audio Limited | Administrative & support | 2017 |
| River Oak Holdings Ltd | Financial services | 2024 |
| Rivergem Investments Limited | Financial services | 2000 |
| Riverside Ironworks Limited | Manufacturing | 2002 |
| Riverside Nursing Home Limited | Real estate | 1993 |
| Riversland Technologies Ltd | Wholesale & retail | 2016 |
| Rivetnut Technology Systems Limited | Wholesale & retail | 1995 |
| Rivivio Aesthetics Ltd | Health & social care | 2025 |
| Rizq Corp Ltd | Hospitality | 2021 |
| RJB Nominee One Limited | Real estate | 2023 |
| RJC Cons Ltd | Professional & scientific | 2025 |
| RJK Tuition Limited | Education | 2022 |
| RJM Media Services Ltd | Professional & scientific | 2011 |
| RJS IT Services Ltd | Information & communication | 2000 |
| Rjsld Studio Ltd | Arts & recreation | 2025 |
| RJW Carpet & Upholstery Cleaning Limited | Households | 2003 |
| RK Consulting Ltd | Professional & scientific | 2024 |
| RK Prime Ltd | Wholesale & retail | 2026 |
| Rkhd Lighting, Sound and Production Limited | Administrative & support | 2017 |
| RKL Plastering & Design Ltd | Construction | 2020 |
| RM Scientific Ltd | Professional & scientific | 2023 |
| RMN Consulting Ltd | Information & communication | 2019 |
| RN Woodcraft Ltd | Manufacturing | 2023 |
| Road Runner Traffic Counter Accessories Limited | Professional & scientific | 1998 |
| ROAD2RESULTS Limited | Professional & scientific | 2025 |
| Robert MAN Ltd | Real estate | 2019 |
| Robert North Ltd | Agriculture & fishing | 2026 |
| Robert Yates (Medical) Limited | Health & social care | 2015 |
| Roberts Marlow Ltd | Administrative & support | 2022 |
| Robertson Tech Solutions Limited | Administrative & support | 2012 |
| Robertsonuk Limited | Construction | 2017 |
| Robi Limited | Transport & logistics | 2013 |
| Robin H Perkins Limited | Construction | 1997 |
| Robinson Tuition Ltd | Education | 2024 |
| Robkase Limited | Other services | 2022 |
| Robotic Assist Ltd | Professional & scientific | 2024 |
| ROC (UK) Manufacturing Ltd | Manufacturing | 2022 |
| Rock Chorus Limited | Arts & recreation | 2014 |
| Rocket Test Facilities Limited | Professional & scientific | 2018 |
| Rockhopper Expeditions Ltd | Arts & recreation | 2015 |
| Rockonyx Equipment Ltd | Wholesale & retail | 2025 |
| Rocky'Srubbish Ltd | Water & waste | 2026 |
| ROD Investments Ltd | Real estate | 2023 |
| Roebuck Park Management Company Limited | Households | 2017 |
| Roexit Two Limited | Transport & logistics | 2019 |
| Roger Baldwin Architectural Design Ltd | Professional & scientific | 2020 |