| Reellab Ltd | Information & communication | 2025 |
| Reevention Ltd | Administrative & support | 2020 |
| Reflexive Solutions Ltd | Health & social care | 2022 |
| Regal Gift Ltd | Wholesale & retail | 2022 |
| Regen Limited | Construction | 2001 |
| Regency Grange (Forest Town) Management Company Limited | Households | 2024 |
| Regency Supermarket Y Limited | Wholesale & retail | 2025 |
| Regent Agile Limited | Professional & scientific | 2022 |
| Regent Court Veterinary Practice Limited | Professional & scientific | 2003 |
| Regent Park (Calne) Management Company Limited | Households | 2017 |
| Regional Refrigeration and Air Conditioning Services Limited | Manufacturing | 2012 |
| Registered Counsellor Ltd | Information & communication | 2021 |
| Rehoboth Smart Cleaners Ltd | Health & social care | 2023 |
| Reignbros Ltd | Hospitality | 2023 |
| REJUVEN8 Exterior Cleaning Ltd | Administrative & support | 2024 |
| Relax and Renew Ltd | Other services | 2022 |
| Reliable Fire Services Ltd | Public administration | 2019 |
| Reliable Interaction Limited | Administrative & support | 2012 |
| Reliance Motor Services Limited | Transport & logistics | 2019 |
| Reliance Safety Solutions Ltd | Extraterritorial | 2021 |
| Relic Films Ltd | Information & communication | 2020 |
| Relocation Matters Ltd | Construction | 2025 |
| Remarkable Homes Limited | Construction | 2017 |
| Remediation Group Holdings Limited | Financial services | 2020 |
| Remitrom Contracting Limited | Construction | 2020 |
| Renaissance Research Ventures Limited | Financial services | 2021 |
| Renew Kitchens Limited | Construction | 2014 |
| Renewable Heritage Trust | Education | 2004 |
| Renftall Corporation Limited | Wholesale & retail | 2012 |
| Renlik Innovative Solutions Limited | Information & communication | 2018 |
| Renovate and Revive Limited | Construction | 2023 |
| Renovate Pro Limited | Construction | 2025 |
| Renrut Consultancy LLP | | 2018 |
| RENT2PLAY Ltd | Administrative & support | 2026 |
| Renu TPS Ltd | Manufacturing | 2015 |
| Renvyle (Holdings) Limited | Professional & scientific | 2007 |
| Repac Homes Limited | Extraterritorial | 1985 |
| Repairios Ltd | Other services | 2023 |
| Represent Media Ltd | Manufacturing | 2019 |
| Representation (Yorkshire) Limited | Professional & scientific | 2018 |
| Representation UK Limited | Other services | 2023 |
| Reptilia Limited | Wholesale & retail | 2015 |
| Repton Holidays Limited | Hospitality | 2026 |
| Repton Park 8 & 10 (Ashford) Residents Management Company Ltd | Households | 2018 |
| Resale Technology Ltd | Information & communication | 2025 |
| Resident Pro Limited | Information & communication | 2011 |
| Resilienceuk CIC | Information & communication | 2025 |
| Resinscape (Yorkshire) Limited | Construction | 2019 |
| Resonus Limited | Information & communication | 2010 |
| Resource Data Solutions Ltd | Information & communication | 2014 |
| Rest UP Ltd | Hospitality | 2021 |
| Restore (York) Limited | Hospitality | 2010 |
| Restore Capital Limited | Financial services | 2019 |
| Retail Associated Services Ltd | Professional & scientific | 2014 |
| Retford Poultry Partnership Limited | Extraterritorial | 2010 |
| Rethink Consulting Limited | Education | 2025 |
| Retirement Plan One Ltd | Real estate | 2021 |
| Retrofit + Architecture Ltd | Construction | 2021 |
| Retrorockstar Limited | Wholesale & retail | 2020 |
| Retrosport Restorations Ltd | Wholesale & retail | 2022 |
| Retrovamp Ltd. | Other services | 2011 |
| Reubens Court Freehold Limited | Financial services | 2019 |
| Review and Redesign Solutions Limited | Professional & scientific | 2017 |
| Revis Holdings Limited | Financial services | 2020 |
| Revis Investments Ltd | Financial services | 2023 |
| Revis Properties Limited | Real estate | 2022 |
| Revis Transport Limited | Transport & logistics | 1986 |
| Revive Contractors Limited | Households | 2023 |
| Revolution Dog Training Ltd | Other services | 2023 |
| Revolution Games Ltd | Information & communication | 2013 |
| Revolution Management Consulting Ltd | Professional & scientific | 2013 |
| Revolution Marine Yacht Solutions Ltd | Manufacturing | 2025 |
| Revolution Protection Dogs Ltd | Other services | 2024 |
| Rewildedliving Ltd | Other services | 2023 |
| Rexstone Rentals Ltd | Real estate | 2025 |
| Reynard Brick and Stone Ltd | Construction | 2019 |
| Reynard Properties York Ltd | Real estate | 2025 |
| Reynard Storage (York) Limited | Administrative & support | 2013 |
| Reynard Storage Ltd | Transport & logistics | 2025 |
| Reynards (Excavations) Limited | Agriculture & fishing | 1974 |
| Reynolds Dental Limited | Health & social care | 2025 |
| Reynoldson Consulting Ltd | Professional & scientific | 2026 |
| Reynoldston Business Services Limited | Information & communication | 2003 |
| Reyt Good Media Ltd | Professional & scientific | 2023 |
| RF Adams & Co Ltd | Professional & scientific | 2002 |
| RF Foods Limited | Hospitality | 2021 |
| RF Psychological Services Ltd | Health & social care | 2020 |
| RG Testing Services Ltd | Professional & scientific | 2025 |
| RH Coaching & Consulting Ltd | Professional & scientific | 2018 |
| RH Dixon &SON Ltd | Agriculture & fishing | 2023 |
| RH Financial Services Ltd | Financial services | 2021 |
| RH Medical Services Limited | Health & social care | 2018 |
| RHD Voids Ltd | Construction | 2021 |
| Rhino Force Ltd | Wholesale & retail | 2024 |
| Rhinox Group Holdings Ltd | Financial services | 2021 |
| Rhodes Computing Limited | Information & communication | 1998 |
| Rhok Group Limited | Real estate | 2021 |
| Rhomb Associates Limited | Professional & scientific | 2015 |
| RHW Partnerships Limited | Construction | 2015 |
| Rhxc Ltd | Hospitality | 2025 |