| Raeworth HR Ltd | Administrative & support | 2022 |
| RAF Builders Ltd | Construction | 2025 |
| Rafpot Labs Ltd | Information & communication | 2024 |
| RAG Technologies Ltd | Manufacturing | 2024 |
| Rags to Stitches Limited | Wholesale & retail | 2021 |
| Rahim Family Office Limited | Professional & scientific | 2025 |
| Rail Road & Waste Ltd | Transport & logistics | 2017 |
| Raimund Vaitkev Ltd | Construction | 2024 |
| Rainbow Air Ltd | Transport & logistics | 2022 |
| Rairify Ltd | Professional & scientific | 2024 |
| Raise With Light Ltd | Education | 2025 |
| RAJ Asian Food Limited | Hospitality | 2025 |
| RAJ Bhuj Limited | Hospitality | 2021 |
| Raja Sons Ltd | Wholesale & retail | 2024 |
| Raji Service Ltd | Wholesale & retail | 2017 |
| RAK Endolist Limited | Health & social care | 2018 |
| RAK Purple Services Ltd | Hospitality | 2023 |
| Rake and Broom Ltd | Water & waste | 2013 |
| Rakewell Limited | Manufacturing | 1986 |
| RAL Property Services Ltd | Construction | 2019 |
| Ramsirc Company Ltd | Professional & scientific | 2012 |
| Rands Residential Properties Limited | Real estate | 2025 |
| Rands Technologies Ltd | Information & communication | 2020 |
| Ranelagh Mansions Freehold Limited | Households | 1993 |
| Range Attack Ltd | Information & communication | 2022 |
| Ranhalu Ltd | Other services | 2022 |
| Rannoc Homes Ltd | Real estate | 2017 |
| Ranpura Investments Ltd | Real estate | 2021 |
| Rantharu Caterers Limited | Hospitality | 2019 |
| Rantharu Group Ltd | Hospitality | 2024 |
| Rapid Legal Ltd | Professional & scientific | 2024 |
| Rapid Ride (Aylesbury) Ltd | Transport & logistics | 2025 |
| Rapidpaint (Birmingham) Limited | Extraterritorial | 2012 |
| Rares Andrei Ltd | Transport & logistics | 2022 |
| Rasgus Limited | Transport & logistics | 2015 |
| Ratcliff Lindsay Design & Management Limited | Professional & scientific | 2004 |
| Raulnicolas Ltd | Construction | 2024 |
| Raven Engineering Consultants Limited | Professional & scientific | 2016 |
| Ravenshill Project Services Ltd | Professional & scientific | 2026 |
| Ravenswood Limited | Professional & scientific | 1996 |
| Raveron Talent Ltd | Information & communication | 2026 |
| RAY SRI Property Limited | Real estate | 2021 |
| Ray-Lee Limited | Health & social care | 2024 |
| Raya Group Developments Ltd | Construction | 2022 |
| Raya Group Developments NO2 Ltd | Construction | 2023 |
| Raynex Group Ltd | Professional & scientific | 2026 |
| RAZ Medics Ltd | Health & social care | 2020 |
| Razbuild Limited | Construction | 2023 |
| Razzle Dazzle Careers Limited | Administrative & support | 2025 |
| RB Automotive Repairs Ltd | Wholesale & retail | 2025 |
| RB PM Services Limited | Professional & scientific | 2025 |
| RB Trading 247 Limited | Transport & logistics | 2026 |
| RBE Joinery&Refurbishment Limited | Construction | 2025 |
| RBL (Bucks) Ltd | Households | 2020 |
| Rbtp Ltd | Administrative & support | 2025 |
| Rcrprojects Limited | Other services | 2016 |
| RDA Cloud & Hospitality Solutions Ltd | Information & communication | 2025 |
| RDB Group Limited | Administrative & support | 2020 |
| RDB Transport Services (UK) Ltd | Transport & logistics | 2014 |
| RDG Construction Management Ltd | Administrative & support | 2021 |
| Rdong Limited | Hospitality | 2023 |
| RDR 23 Ltd | Wholesale & retail | 2025 |
| RDR Aram Ltd | Hospitality | 2019 |
| RDR Consultancy Limited | Administrative & support | 2023 |
| RDR V14 Ltd | Hospitality | 2025 |
| RDX Consulting Ltd | Professional & scientific | 2013 |
| RE Contractors Ltd | Construction | 2023 |
| RE Installations Ltd | Construction | 2020 |
| Reach Aviation Holdings Ltd | Financial services | 2026 |
| Ready Payco Ltd | Other services | 2024 |
| Real Cleaning Solutions Ltd | Administrative & support | 2026 |
| Real Solutions Limited | Professional & scientific | 2010 |
| Reality Pictures Limited | Information & communication | 2002 |
| Really Clothing Ltd | Wholesale & retail | 2025 |
| Really Free Solutions Ltd | Information & communication | 2006 |
| Reappraise Ltd | Health & social care | 2021 |
| Reas Group Ltd | Information & communication | 2015 |
| Rebarint Limited | Construction | 2022 |
| Rebecca Shirley Ltd | Health & social care | 2021 |
| Rebel Badminton Academy Limited | Wholesale & retail | 2023 |
| Rebenos Limited | Hospitality | 2024 |
| Reclaimed Fire Ltd | Hospitality | 2024 |
| Recon Oxford Limited | Wholesale & retail | 2023 |
| Reconstructive Solutions Limited | Health & social care | 2012 |
| RECOVERY4SURE Limited | Health & social care | 2023 |
| Rectory (Aston Clinton) Limited | Construction | 2014 |
| Rectory Barns Limited | Real estate | 2001 |
| Rectory Commercial Ltd | Real estate | 2013 |
| Rectory Fields (Wilstone) Management Company Ltd | Households | 2025 |
| Rectory Homes (South) Limited | Construction | 2008 |
| Rectory Homes Bonds PLC | Professional & scientific | 2014 |
| Rectory Lifestyle Limited | Construction | 2018 |
| Rectory Living Ltd | Real estate | 2013 |
| Rectory Long Hanborough Management Company Ltd | Households | 2021 |
| Rectory Park Management Company (Thame) Limited | Households | 2004 |
| Rectory Woods (Ickford) Management Company Ltd | Households | 2022 |
| Recyclatyre Ltd | Water & waste | 2026 |
| Red Bear Property Care Limited | Administrative & support | 2022 |
| Red Carpet Salons Limited | Other services | 2011 |
| Red Desk Ltd | Administrative & support | 2009 |