| Richard Russell Investments Ltd | Real estate | 2025 |
| Richard Russell Ltd | Financial services | 2024 |
| Richard Russell Surveyors Ltd | Professional & scientific | 2021 |
| Richards Dhillon Limited | Information & communication | 2001 |
| Richmond Court (Leamington) Limited | Real estate | 1997 |
| Ride Worldwide Trading Ltd | Wholesale & retail | 2024 |
| Rika Logistics Ltd | Transport & logistics | 2026 |
| Riley Radio Consultancy Services Limited | Information & communication | 2018 |
| Rinzz Limited | Arts & recreation | 2025 |
| Riotech Pharmaceuticals Limited | Professional & scientific | 2001 |
| Rise and Shine Aircraft Valet Services Limited | Other services | 1998 |
| Rising Renewable UK Limited | Wholesale & retail | 2024 |
| Rising Star Homes Ltd | Health & social care | 2020 |
| Risk Evolves Ltd | Professional & scientific | 2015 |
| Risk, Compliance & Governance Consulting Limited | Professional & scientific | 2018 |
| Riva Associates Limited | Professional & scientific | 2018 |
| River Homes Construction Ltd | Construction | 2020 |
| Riverhouse International Limited | Professional & scientific | 2001 |
| Riverside Skin Clinic Ltd | Health & social care | 2020 |
| Riversleigh Podiatry Limited | Health & social care | 2018 |
| Rivrite Tools Ltd | Manufacturing | 2025 |
| RIX Performance AI Ltd | Information & communication | 2026 |
| RJA Agronomy Ltd | Agriculture & fishing | 2012 |
| RJA US Consulting Ltd | Professional & scientific | 2025 |
| RJL Modelling Limited | Administrative & support | 2010 |
| RJM Construction & Development Ltd | Construction | 2026 |
| Rjnf Consulting Ltd | Professional & scientific | 2020 |
| RJT Building Contracts Ltd | Construction | 2020 |
| RKD Logistics Ltd | Transport & logistics | 2020 |
| RKD Systems Ltd | Manufacturing | 2023 |
| RKG Holdings Limited | Financial services | 2023 |
| RM Investors Ltd | Real estate | 2023 |
| RM Risk Management Limited | Health & social care | 2004 |
| Rmbl Business Management Ltd | Professional & scientific | 2021 |
| RMR Automotive Limited | Professional & scientific | 2013 |
| RMR Legal Limited | Professional & scientific | 2024 |
| RMW Homes Limited | Real estate | 2024 |
| Road Buddy Limited | Wholesale & retail | 2020 |
| Road Buddy Warwickshire Ltd | Wholesale & retail | 2025 |
| Rob-Ski Ltd | Transport & logistics | 2026 |
| Robafoam Ltd | Manufacturing | 2012 |
| Robert Dover Consulting Limited | Professional & scientific | 2012 |
| Robert Hadley Limited | Agriculture & fishing | 2013 |
| Robert Howell Limited | Financial services | 1997 |
| Robert Johnston Consultancy Services Limited | Professional & scientific | 2017 |
| Roberts Reliable Renovations Ltd | Construction | 2025 |
| Robsim Ltd. | Professional & scientific | 2013 |
| Robson Jones Ltd | Professional & scientific | 2012 |
| Rockmill (Leamington Spa) Management Company Limited | Real estate | 2000 |
| Rockwealth Leamington Limited | Administrative & support | 2018 |
| Rocky GAP Limited | Households | 2017 |
| Rodney Melville and Partners Limited | Professional & scientific | 2008 |
| ROE Care Services Ltd | Health & social care | 2023 |
| Roebuck Digital Ltd | Information & communication | 2020 |
| Roffey Consulting Ltd | Other services | 2020 |
| Rogan O'Connor Ltd | Professional & scientific | 2020 |
| Rogo Limited | Information & communication | 2023 |
| Roletide Limited | Information & communication | 2025 |
| Roma Pools, Ponds and Landscapes Ltd | Administrative & support | 2023 |
| Romeo Golf Aviation Ltd | Administrative & support | 2021 |
| Romeo Golf Software Ltd | Information & communication | 2026 |
| Romford South Ltd | Hospitality | 2017 |
| Romt Limited | Professional & scientific | 2017 |
| Ronak Construction Ltd | Construction | 2026 |
| Roncov Limited | Hospitality | 2025 |
| Ronnie's Properties Limited | Real estate | 2021 |
| Ronnies of Warwick Limited | Hospitality | 2019 |
| Roobo Transport Ltd | Transport & logistics | 2024 |
| Roofstore South East Limited | Manufacturing | 2023 |
| Rook International Ltd | Information & communication | 2018 |
| Rooost Ltd | Hospitality | 2022 |
| Roque Engineering Design Ltd | Professional & scientific | 2013 |
| Rory Ryder Ltd | Professional & scientific | 2023 |
| Rosalind Franklin Limited | Professional & scientific | 2024 |
| Rosamaya Limited | Hospitality | 2014 |
| Roscar Group Ltd | Professional & scientific | 2026 |
| Rose & Young Recruitment Ltd | Administrative & support | 2020 |
| Rose Capital Holdings Ltd | Professional & scientific | 2021 |
| Rose Lord Collective Ltd | Administrative & support | 2024 |
| Rosey Cassidy Holdings Ltd | Financial services | 2020 |
| Rosie's Tearoom Limited | Hospitality | 2016 |
| Rossnic IT Solutions Limited | Information & communication | 2007 |
| Roux Property Limited | Real estate | 2018 |
| Rover Promotions Limited | Other services | 2026 |
| Rovertek Ltd | Wholesale & retail | 2026 |
| Rovertek Parts Ltd | Wholesale & retail | 2026 |
| ROW OUT Ltd | Professional & scientific | 2017 |
| Rowan Consulting (Rugby) Limited | Construction | 2018 |
| Rowland Air Conditioning Ltd | Construction | 2019 |
| Royal Leamington Spa Chamber of Trade | Other services | 2018 |
| Royal Leamington Spa Surveys Limited | Professional & scientific | 2017 |
| Royal Spa Decoration Limited | Construction | 2016 |
| Royalty Bathrooms Ltd | Wholesale & retail | 2024 |
| RP Bookkeeping Services Ltd | Professional & scientific | 2017 |
| RPA Global Ltd | Information & communication | 2023 |
| RPM Welding Consultants Limited | Professional & scientific | 2011 |
| Rpni Ltd | Real estate | 2020 |
| RPS INV Ltd | Financial services | 2021 |
| RR Solutions (UK) Limited | Information & communication | 2007 |
| RRG Business Services Ltd | Administrative & support | 2019 |