| Retailmania Ltd | Wholesale & retail | 2020 |
| Retro Games Ltd | Manufacturing | 2015 |
| Retro Toys Ltd | Manufacturing | 2024 |
| Retrofit Energy Solutions Ltd | Construction | 2025 |
| Retrofit Evaluators Ltd | Administrative & support | 2024 |
| Rett UK | Health & social care | 2010 |
| Reun Thai Spicy Ltd | Hospitality | 2025 |
| Reunio Limited | Professional & scientific | 2024 |
| REV Services Ltd | Other services | 2025 |
| Revano Ltd | Professional & scientific | 2022 |
| Revelstoke Bidco Limited | Financial services | 2023 |
| Revelstoke Midco Limited | Financial services | 2023 |
| Revelstoke Topco Limited | Financial services | 2023 |
| Revenue Recovery Solutions Limited | Administrative & support | 2026 |
| Reverse Engineering Designs Limited | Professional & scientific | 2020 |
| Reviewbite Limited | Information & communication | 2020 |
| Reviva Physio Ltd | Health & social care | 2026 |
| Revive Beauty Spa Ltd | Other services | 2011 |
| Revive Family&Youth Services | Education | 2018 |
| Revjen Trading Ltd | Wholesale & retail | 2018 |
| Revla Service Ltd | Construction | 2025 |
| Revlo Limited | Extraterritorial | 2018 |
| Revocharge Ltd | Construction | 2026 |
| Revolution Luton Ltd | Health & social care | 2024 |
| Revolution Plant Hire Ltd | Administrative & support | 2024 |
| Revolve ENG Ltd | Wholesale & retail | 2025 |
| Revsky Traders Ltd | Wholesale & retail | 2023 |
| Revu Automotives Ltd | Professional & scientific | 2023 |
| Revvguard Customs Limited | Wholesale & retail | 2026 |
| Revvguard Ltd | Wholesale & retail | 2025 |
| Reward Enterprises PVT Ltd | Wholesale & retail | 2025 |
| Rewindone Radio CIC | Information & communication | 2026 |
| Rewrite Limited | Professional & scientific | 2018 |
| REX Data Solutions Ltd | Information & communication | 2026 |
| Rexam Beverage CAN (India Holdings) Limited | Professional & scientific | 1995 |
| Rexam Beverage Packaging Holdings Limited | Professional & scientific | 1992 |
| Rexam Book Printing Limited | Professional & scientific | 1900 |
| Rexam European Holdings Limited | Professional & scientific | 1987 |
| Rexam Finance Company Limited | Administrative & support | 1958 |
| Rexam Finance Germany Limited | Administrative & support | 2007 |
| Rexam Finance Sweden Limited | Administrative & support | 2007 |
| Rexam Group Holdings Limited | Professional & scientific | 2005 |
| Rexam Limited | Professional & scientific | 1923 |
| Rexam Overseas Holdings Limited | Professional & scientific | 1901 |
| Rexam Plastic Containers Limited | Administrative & support | 1989 |
| Rexam Property Developments Limited | Administrative & support | 1946 |
| Rexam Property Holdings Limited | Administrative & support | 1937 |
| Rexam UK Holdings Limited | Professional & scientific | 1935 |
| Reyansh Homes Ltd | Financial services | 2021 |
| Rezeek Limited | Wholesale & retail | 2024 |
| Rezum Recruit Ltd | Administrative & support | 2025 |
| RG Reed Limited | Health & social care | 2013 |
| RG2 Slam Ltd | Hospitality | 2024 |
| Rgma Fire & Security Solutions Limited | Construction | 2016 |
| RGS4X4 Ltd | Construction | 2023 |
| RH Buraq Traders Limited | Wholesale & retail | 2024 |
| RH Capital Trading Ltd | Wholesale & retail | 2025 |
| RH Editing Limited | Information & communication | 2016 |
| RH Foods Ltd | Wholesale & retail | 2014 |
| RH Properties Group Ltd | Real estate | 2025 |
| RHA Construction Services Ltd | Extraterritorial | 2020 |
| RHA Recruiting Limited | Administrative & support | 2024 |
| RHA Soft Limited | Information & communication | 2016 |
| RHK Motors Ltd | Wholesale & retail | 2023 |
| Rhombus Ltd | Professional & scientific | 2018 |
| RHS Catering Ltd | Hospitality | 2024 |
| RHS Heating Ltd | Construction | 2016 |
| RHS Motors Ltd | Wholesale & retail | 2026 |
| Rhylux Limited | Wholesale & retail | 2019 |
| RIA Transport Ltd | Wholesale & retail | 2025 |
| Riabuz Ltd | Education | 2023 |
| Riaflex Limited | Wholesale & retail | 2012 |
| Rian LAL Limited | Hospitality | 2024 |
| Rianne Anderson Aircraft Maintenance Services Ltd | Manufacturing | 2022 |
| Riaz Travel & Consultancy Limited | Administrative & support | 2020 |
| Ricci Designs Ltd | Wholesale & retail | 2026 |
| Rich Training Solutions Ltd | Education | 2024 |
| Richandtrin Ltd | Hospitality | 2026 |
| Richard Boateng ESQ Ltd | Administrative & support | 2016 |
| Richard Cooper Limited | Transport & logistics | 2009 |
| Richard Harker Frcs Limited | Health & social care | 2010 |
| Richard's Fishbar Ltd | Hospitality | 2025 |
| Richards Haynes Ltd | Construction | 2024 |
| Richardson Court Management Company Limited | Households | 2015 |
| Richardson Family Limited | Extraterritorial | 2025 |
| Richardson Green Energy Limited | Extraterritorial | 2025 |
| Richmay Ltd | Other services | 2022 |
| Richmond & Haven Ltd | Hospitality | 2024 |
| Richmond Advantage Limited | Real estate | 2025 |
| Richmond Autos Limited | Wholesale & retail | 2025 |
| Richmond Court (Luton) Management Company Limited | Households | 1970 |
| Richmond Digital Solutions Ltd | Wholesale & retail | 2024 |
| Richmond Housing Solutions Limited | Construction | 2016 |
| Rickmores Electrical Centre Limited | Wholesale & retail | 2023 |
| Rickmos Ltd | Transport & logistics | 2021 |
| RID Ltd | Construction | 1999 |
| Riddy Enterprises Ltd | Hospitality | 2018 |
| Riddy Lane Stores Ltd | Wholesale & retail | 2025 |
| Ride 2 Airport 247 Limited | Transport & logistics | 2026 |
| Ride Concierge Ltd | Transport & logistics | 2023 |