| Regather Commercial Limited | Wholesale & retail | 2006 |
| Regency Court (S35) RTM Company Limited | Households | 2026 |
| Regency Garden Buildings Limited | Manufacturing | 1998 |
| Regeneration Nation CIC | Agriculture & fishing | 2025 |
| Regenerative Cell Therapy Consulting Limited | Professional & scientific | 2022 |
| Regent Investments and Holdings Ltd | Real estate | 2025 |
| Regentcomply.Ai Ltd | Information & communication | 2025 |
| Regina Takeaway Ltd | Hospitality | 2022 |
| Regional CAD Systems Limited | Manufacturing | 1998 |
| Regional Care Concept Limited | Health & social care | 2024 |
| Rehab Guru Limited | Information & communication | 2008 |
| Rehlat Almusafer Travel Agancy Ltd | Administrative & support | 2026 |
| Rehman & Sons Residential Ltd | Real estate | 2025 |
| Rehman Enterprises Ltd | Health & social care | 2008 |
| Rehman Law Chambers Ltd | Professional & scientific | 2024 |
| Rehman Property Group Ltd | Real estate | 2022 |
| Rehmani Rooms Limited | Real estate | 2022 |
| Rehnstrom Medical Ltd | Health & social care | 2026 |
| Reidsskiphire Ltd | Water & waste | 2019 |
| Reigate Property and Shares Limited | Real estate | 2018 |
| Reigate Stock Share and Estates Company Limited | Real estate | 1870 |
| Reign. Mentoring Ltd | Professional & scientific | 2023 |
| Reilly's Property Services Ltd | Construction | 2018 |
| Reiver Returns Ltd | Hospitality | 2024 |
| Rejuvenated Limited | Wholesale & retail | 2003 |
| Rejuvetech Ltd | Professional & scientific | 2013 |
| Rekan Jaff Limited | Other services | 2025 |
| Relatable Security Limited | Information & communication | 2025 |
| Relco Ventures Ltd | Hospitality | 2023 |
| Rele Consultancy Ltd | Health & social care | 2023 |
| Release Property Consultancy Limited | Real estate | 2014 |
| Relentless Prep Co Ltd | Hospitality | 2026 |
| Reliable Vehicle Logistics Ltd | Transport & logistics | 2017 |
| Reliacare Limited | Health & social care | 2009 |
| Reliance Locums Limited | Wholesale & retail | 2007 |
| Reliance Network UK Ltd | Wholesale & retail | 2025 |
| Reliance Support Care Solutions Ltd | Administrative & support | 2016 |
| Reliance.Com Limited | Administrative & support | 2004 |
| Reliant 247 Recruitment Ltd | Hospitality | 2022 |
| Relish (Doncaster) Limited | Hospitality | 2008 |
| Relish Digital Limited | Professional & scientific | 2013 |
| Relish Media Yorkshire Limited | Information & communication | 2018 |
| REM Site Services Ltd | Professional & scientific | 2023 |
| Remap Surveys Limited | Professional & scientific | 1998 |
| Remarja Residences Ltd | Hospitality | 2025 |
| Reme Ltd | Professional & scientific | 2015 |
| Remedy House Ltd | Real estate | 2015 |
| Remedy Physio Ltd | Health & social care | 2012 |
| Remember When Sheffield Ltd | Hospitality | 2017 |
| Remit Choice Limited | Financial services | 2019 |
| Remmys Medical Ltd | Wholesale & retail | 2025 |
| Remnant Sports CIC | Arts & recreation | 2025 |
| Remo's Coffee Bar Limited | Hospitality | 2012 |
| Remora Group Limited | Information & communication | 2006 |
| Remote Accountant Ltd | Professional & scientific | 2021 |
| Removal Services Ltd | Transport & logistics | 2016 |
| Removals B2U Ltd | Transport & logistics | 2016 |
| Remy Jones Limited | Information & communication | 2025 |
| Renatino Realty Limited | Real estate | 2025 |
| Rendaplast Developments Ltd | Real estate | 2020 |
| Rendermine Ltd | Professional & scientific | 2024 |
| Renderplaster UK Limited | Construction | 2024 |
| Rendis Ltd | Construction | 2012 |
| Rendis Properties Ltd | Real estate | 2019 |
| Rendplast Ltd | Professional & scientific | 2014 |
| Renegade Barber Ltd | Other services | 2024 |
| Reneville Consultancy Ltd | Wholesale & retail | 2023 |
| Renew Professional Services Limited | Administrative & support | 2023 |
| Renew Solutions Ltd | Construction | 2016 |
| Renewable Hire Ltd | Extraterritorial | 2024 |
| Renewal Counselling & Psychotherapy Ltd | Education | 2025 |
| Renewfood Limited | Professional & scientific | 2024 |
| Renishaw Miners Welfare Social Club Limited | Hospitality | 1992 |
| Renishaw Spice Ltd | Hospitality | 2025 |
| RENOV8 Joinery Ltd | Construction | 2024 |
| Renovate Design Build Limited | Construction | 2020 |
| Renovation Everyday Limited | Construction | 2021 |
| Renovaworks Ltd | Construction | 2026 |
| Renoviix Ltd | Construction | 2025 |
| Renowise Property Solutions Ltd | Construction | 2025 |
| Renowned Publishing Limited | Information & communication | 2012 |
| Renowned Records Ltd | Arts & recreation | 2011 |
| Rent a Boat Limited | Transport & logistics | 2022 |
| Rent a CUT Limited | Administrative & support | 2019 |
| Rent Sphere Ltd | Real estate | 2024 |
| Rent to Rent 2 Limited | Real estate | 2025 |
| Rent to Rent Ltd | Real estate | 2019 |
| RENT2YOU Ltd | Real estate | 2021 |
| Rentacharge Ltd | Administrative & support | 2025 |
| Rental Essentials Limited | Real estate | 2010 |
| Rental Vision Group Ltd | Real estate | 2023 |
| Rental Vision Holding Limited | Financial services | 2025 |
| Rental Vision Plus Limited | Real estate | 2024 |
| RENTING2U Limited | Real estate | 2016 |
| Rentquest Limited | Real estate | 2023 |
| Rentspace Limited | Real estate | 2014 |
| Renuluxe Health Limited | Health & social care | 2022 |
| Renzo’S Security Ltd | Administrative & support | 2026 |
| Renéessance Ltd | Other services | 2021 |
| Reomc Holdings Limited | Wholesale & retail | 2020 |