| Russko Investments Ltd | Real estate | 2026 |
| Russko Limited | Wholesale & retail | 2002 |
| Rustica Restaurant Ltd | Hospitality | 2023 |
| Ruswarp Innovations Ltd | Transport & logistics | 2014 |
| RUT Limited | Wholesale & retail | 2024 |
| Ruth & Wadia Ltd | Health & social care | 2013 |
| Ruth Austin Limited | Financial services | 2025 |
| Ruth James Limited | Financial services | 2018 |
| Ruth Wagstaff Recruitment Limited | Professional & scientific | 2011 |
| Rutherford Holdings Ltd | Real estate | 2016 |
| Ruthlandcleaninggroup Ltd | Administrative & support | 2026 |
| Ruthlyn House Wealth Management Limited | Financial services | 2005 |
| Rutland Car Storage Limited | Other services | 2017 |
| Rutland College Limited | Education | 2024 |
| Rutland County Bathrooms Limited | Wholesale & retail | 2003 |
| Rutland Furniture Stores Ltd | Wholesale & retail | 2023 |
| Rutland Garage Doors Ltd | Construction | 2006 |
| Rutland Garden Centre Limited | Wholesale & retail | 2003 |
| Rutland House (Leicester) Management Company Limited | Households | 2007 |
| Rutland Inn Company Limited | Hospitality | 1999 |
| Rutland Insurance Brokers Ltd | Financial services | 2024 |
| Rutland OIL Fired Boiler Services Limited | Construction | 2011 |
| Rutland Plumbing and Heating Services Limited | Construction | 2001 |
| Rutland Roofing Limited | Construction | 2008 |
| Rutland Steel and Fabrications Limited | Extraterritorial | 2022 |
| Rutland Street Productions Limited | Arts & recreation | 2024 |
| Rutland Transport Limited | Transport & logistics | 2013 |
| Rutland Wills and Estate Planning Limited | Financial services | 2018 |
| Ruut Aircon and Air Source Limited | Construction | 2025 |
| Ruut Bars Limited | Hospitality | 2023 |
| Ruut Development Limited | Real estate | 2021 |
| Ruut Financial Services Limited | Financial services | 2026 |
| Ruut Homes Limited | Real estate | 2017 |
| Ruut Investments Limited | Real estate | 2022 |
| Ruut Precious Metals Limited | Wholesale & retail | 2025 |
| Ruya Pizza Ltd | Hospitality | 2026 |
| Ruyal PAN Ltd | Wholesale & retail | 2023 |
| Ruyang Guardian Service & Educational Consultancy Ltd | Education | 2010 |
| Ruyat Jamila Ltd | Hospitality | 2025 |
| Ruyii Ltd | Hospitality | 2026 |
| RV Sons UK Ltd | Wholesale & retail | 2023 |
| Rvested Limited | Information & communication | 2024 |
| RVJ Enterprises Ltd | Professional & scientific | 2003 |
| RVJ Properties Ltd | Real estate | 2020 |
| RVK Wholesale Ltd | Wholesale & retail | 2026 |
| RVM Invest Co Limited | Financial services | 2025 |
| RVM Investments Limited | Real estate | 2019 |
| Rvmf Consulting Limited | Professional & scientific | 2024 |
| RVP Aviation Ltd | Professional & scientific | 2025 |
| RVP Clothing Ltd | Wholesale & retail | 2024 |
| RVR Consultancy Ltd | Professional & scientific | 2025 |
| RVR Properties (Leic) Limited | Real estate | 2015 |
| Rvwc Holdings Ltd | Financial services | 2018 |
| RVX Global Limited | Wholesale & retail | 2025 |
| RW Ducting Limited | Construction | 2020 |
| RWA Constructions Ltd | Construction | 2021 |
| Rwcm Ltd | Construction | 2023 |
| RWN Naunton Services Limited | Administrative & support | 2020 |
| RWN White Services Limited | Administrative & support | 2020 |
| RX Advisor Limited | Professional & scientific | 2007 |
| RX Chem Ltd | Health & social care | 2013 |
| RX Counsel Ltd | Health & social care | 2023 |
| RX Pharma (Services) Ltd | Wholesale & retail | 2023 |
| RX Pharma Packaging Ltd | Wholesale & retail | 2026 |
| RX Portfolio Limited | Real estate | 2016 |
| Rxcbs Ltd | Professional & scientific | 2014 |
| RY Reliance Services Ltd | Transport & logistics | 2025 |
| RY Window Cleaning Services Ltd | Administrative & support | 2019 |
| Ryaan Transport Limited | Transport & logistics | 2018 |
| Ryan Carpets & Flooring Ltd | Construction | 2026 |
| Ryan Devlin Limited | Construction | 2024 |
| Ryan Elson Ltd | Arts & recreation | 2025 |
| Ryan Graphics Ltd | Manufacturing | 2019 |
| Ryan Jason Ltd | Professional & scientific | 2026 |
| Ryan Oliver Construction Ltd | Construction | 2019 |
| Ryan Paul Properties Ltd | Real estate | 2023 |
| Ryan Properties Leicester Ltd | Real estate | 2025 |
| Ryan-Osullivan.Com Ltd | Professional & scientific | 2023 |
| Ryanclean Limited | Other services | 2017 |
| Rybrook Automotive Limited | Professional & scientific | 2006 |
| Rybrook Cars Limited | Wholesale & retail | 1988 |
| Rybrook Group Limited | Professional & scientific | 2021 |
| Rybrook Investments Limited | Professional & scientific | 2023 |
| Rybrook Limited | Wholesale & retail | 2006 |
| Rybrook Services Limited | Administrative & support | 2006 |
| Ryburn Cars Limited | Professional & scientific | 1985 |
| Rycar Limited | Professional & scientific | 1991 |
| Rycom Vehicles Limited | Professional & scientific | 1993 |
| Rycroft Vehicles Limited | Wholesale & retail | 1930 |
| Rydal Langs Ltd | Wholesale & retail | 2025 |
| Rydale Cardiff Limited | Professional & scientific | 1997 |
| Rydnal Limited | Professional & scientific | 2003 |
| Rydzowski Investments Ltd | Real estate | 2022 |
| Ryedale House Limited | Health & social care | 2008 |
| Ryehill Properties (Wales) Limited | Real estate | 2007 |
| Ryland Dickson Limited | Professional & scientific | 1975 |
| Rylands Residential Property Limited | Real estate | 2020 |
| Rylen Holdings Ltd | Manufacturing | 2025 |
| Ryley Holdings Limited | Real estate | 2023 |
| Ryminster Healthcare Limited | Health & social care | 2011 |