| Radford Grange Management Company Limited | Households | 2004 |
| Radford Joinery Limited | Construction | 2011 |
| Radford Weeks Developments Limited | Construction | 2020 |
| Radiance Medispa Limited | Other services | 2016 |
| Radiate Plumbing & Heating Services Limited | Construction | 2004 |
| Radical. Clothing Limited | Wholesale & retail | 2023 |
| Radicchio SW Ltd | Hospitality | 2024 |
| Radiocom Electronics Limited | Manufacturing | 1999 |
| Radmore & Tucker (Holdings) Limited | Wholesale & retail | 1999 |
| Radmore & Tucker Limited | Wholesale & retail | 1993 |
| Radmur Ltd | Information & communication | 2019 |
| Radnor Car Sales Limited | Real estate | 1958 |
| Radstone P.V. Ltd | Energy | 2013 |
| Radu Cojocariu Ltd | Transport & logistics | 2021 |
| Radu Taxi Ltd | Transport & logistics | 2025 |
| RAE Consulting Limited | Professional & scientific | 2008 |
| Rage Creative Ltd | Professional & scientific | 2024 |
| Raid Vision Ltd | Information & communication | 2013 |
| Railway Signalling South West Ltd | Transport & logistics | 2013 |
| Rainbird & Sons Ltd | Agriculture & fishing | 2026 |
| Rainbird Automotive Ltd | Wholesale & retail | 2021 |
| Rainbow Bridge Vets Group Limited | Professional & scientific | 2023 |
| Rainbow Holdings (UK) Limited | Wholesale & retail | 2005 |
| Rainbow Hunting Limited | Professional & scientific | 2020 |
| Rainbow Living SW | Hospitality | 2018 |
| Rainbow S & L Limited | Wholesale & retail | 2005 |
| Rainbow Square Ltd | Wholesale & retail | 2026 |
| Rainbow Water Limited | Professional & scientific | 1987 |
| Rainbow Wholesale Limited | Wholesale & retail | 2005 |
| Rainmaker Sales Solutions Ltd | Professional & scientific | 2008 |
| Rainy London Limited | Professional & scientific | 2008 |
| RAK Business Services Limited | Professional & scientific | 2014 |
| Rakestrow Engineering Ltd | Administrative & support | 2015 |
| RALEIGH74 Limited | Real estate | 2019 |
| Rallentando Ltd | Professional & scientific | 2022 |
| Ralph Properties Limited | Real estate | 2014 |
| Rama Life CIC | Education | 2020 |
| Ramos & Corzo Company Ltd | Wholesale & retail | 2023 |
| Ramsbury Trading and Investments | Professional & scientific | 2025 |
| Ramx Web Solutions Ltd | Information & communication | 2026 |
| Rana Live Support Limited | Professional & scientific | 2025 |
| Randalls Estate Limited | Real estate | 2023 |
| Rando-T Clothing Ltd | Wholesale & retail | 2021 |
| Ranelagh Grove Management Company Limited | Households | 2026 |
| Range Experts Ltd | Other services | 2015 |
| Ranger Couriers Limited | Transport & logistics | 2024 |
| Rankmeon AI Ltd | Information & communication | 2026 |
| Ransoms Residential Ltd | Real estate | 2015 |
| Rapid AI Limited | Information & communication | 2023 |
| Rapid Fusion Ltd | Manufacturing | 2023 |
| Rapid Scaffolding (SW) Limited | Construction | 2011 |
| Rapid-Lurez Ltd | Wholesale & retail | 2025 |
| Rapidreg Limited | Information & communication | 2020 |
| Rapport Legal Consulting Limited | Administrative & support | 2024 |
| Rappsco Ltd | Construction | 2014 |
| Rappsco Property Investments Ltd | Construction | 2013 |
| Rashi's Ceylon Kitchen Limited | Hospitality | 2025 |
| Rasmussen Marine Services Ltd | Professional & scientific | 2010 |
| Raul Cleaning Ltd | Administrative & support | 2025 |
| Raven Brands Ltd | Wholesale & retail | 2026 |
| Ravenslade Limited | Construction | 2008 |
| Ravi Property Group Ltd | Real estate | 2026 |
| Raviga Group Limited | Information & communication | 2018 |
| Raviga Holdings Limited | Financial services | 2018 |
| Rawson Decorating Ltd | Construction | 2024 |
| RAY Creative and Media Limited | Professional & scientific | 2023 |
| RAY Stephens & SON Building & Civil Engineering Ltd | Construction | 2009 |
| Raybäckhuvud Limited | Financial services | 2020 |
| Raymond Radmore (Tavistock) Limited | Transport & logistics | 1964 |
| Rayner Estates Ltd | Real estate | 2023 |
| RAZ & Razor Ltd | Other services | 2019 |
| Razio Barber Ltd | Other services | 2026 |
| RB Vehicle Transport Ltd | Transport & logistics | 2023 |
| Rbaero Ltd | Manufacturing | 2021 |
| RBL Homes Limited | Construction | 2011 |
| RBS Global Media Ltd | Professional & scientific | 2008 |
| RC Scaffolding (Exeter) Limited | Construction | 2025 |
| RCO Bricklaying & Building Contractors Ltd | Construction | 2012 |
| Rcrtr Limited | Administrative & support | 2024 |
| RCS (SW) Ltd | Administrative & support | 2020 |
| RD Digital Marketing Ltd | Professional & scientific | 2020 |
| RD Reporting Limited | Health & social care | 2014 |
| RD Support Space Limited | Health & social care | 2018 |
| RDC Consultancy Services Limited | Households | 2015 |
| Rduh Developments Limited | Real estate | 2026 |
| Re-Flow Field Management Limited | Extraterritorial | 2024 |
| Ready Drinks Limited | Manufacturing | 2025 |
| Ready Made Homes Limited | Real estate | 2021 |
| Real Life Psychology C.I.C. | Other services | 2019 |
| Realitech Limited | Information & communication | 2015 |
| Realitylayer Ltd | Professional & scientific | 2026 |
| Rebanth Ltd | Financial services | 2025 |
| Rebecca Busby Ltd | Professional & scientific | 2025 |
| Rebecca Penn Podiatry Limited | Health & social care | 2026 |
| Reboot Coaching Limited | Professional & scientific | 2011 |
| Rebrov Medical Services Ltd | Health & social care | 2024 |
| Rebuild Sports Clinic Ltd | Health & social care | 2018 |
| Recharge Solar Limited | Construction | 2022 |
| Reciprocal Exchange Limited | Extraterritorial | 2020 |
| Recohome Ltd | Construction | 2015 |