| READY4MED Ltd | Education | 2024 |
| Real Estate Leamington Ltd | Real estate | 2023 |
| Real Homes Design and Construction Limited | Construction | 2008 |
| Really Good Films Limited | Information & communication | 2018 |
| Realtimeknowledge.Com Limited | Information & communication | 2016 |
| Reay Beaton Consultancy Limited | Administrative & support | 2024 |
| Rebecca Carre Ltd | Information & communication | 2021 |
| Reboot Psychology Ltd | Health & social care | 2020 |
| Rebound Media Ltd | Information & communication | 2022 |
| Rebound Rubber Limited | Manufacturing | 2019 |
| Receptor Technologies Limited | Wholesale & retail | 2018 |
| Recovali Ltd | Transport & logistics | 2023 |
| Recovery KIT Ltd | Health & social care | 2025 |
| Rectory Events Limited | Professional & scientific | 2020 |
| Red Button Craft Limited | Manufacturing | 2012 |
| Red COW (Exeter) Limited | Wholesale & retail | 2007 |
| Red Kite Overtures Limited | Real estate | 2018 |
| Red Pepper Investments Limited | Real estate | 2025 |
| Red Phantom Games Limited | Information & communication | 2012 |
| Red Sky Shepherds Huts Limited | Construction | 2016 |
| Red-Kite Group Services Limited | Professional & scientific | 2015 |
| Redland Court Management Company Limited | Households | 1972 |
| Redlinereworks Limited | Wholesale & retail | 2026 |
| Redscribe Limited | Information & communication | 2018 |
| Redsquirrl Ltd | Administrative & support | 2021 |
| Redwax Ltd | Information & communication | 2012 |
| Redwood Advisory Limited | Professional & scientific | 2024 |
| Redza & Sons Ltd | Wholesale & retail | 2025 |
| Reed & Reed Property Ltd | Real estate | 2018 |
| Reed Investments Ltd | Real estate | 2025 |
| Rees Media Group Ltd | Information & communication | 2025 |
| Reeves & Partners Limited | Real estate | 2018 |
| Regen Rooms Ltd | Health & social care | 2024 |
| Regency Design & Development Limited | Construction | 2019 |
| Regency Floors (Leamington) Ltd | Construction | 2018 |
| Regency Guest House Limited | Hospitality | 2008 |
| Regency Hire Limited | Transport & logistics | 2018 |
| Regency House Residents Association (Leamington Spa) Limited | Households | 1974 |
| Regency Radiology and Respiratory Services Ltd | Health & social care | 2018 |
| Regenesis Health Group Ltd | Administrative & support | 2026 |
| Regent Advisory Ltd | Professional & scientific | 2025 |
| Regent Capital Investments Limited | Real estate | 2023 |
| Regent Clinic Ltd | Health & social care | 2021 |
| Regent Facilities Limited | Financial services | 2011 |
| Regent House Services Limited | Administrative & support | 2001 |
| Regent Mews Management Limited | Real estate | 2015 |
| Regent Print & Frame Ltd | Manufacturing | 2015 |
| Regent Suit Ltd | Wholesale & retail | 2019 |
| Regents Capital Limited | Real estate | 2012 |
| Region Synergy Ltd | Administrative & support | 2020 |
| Rehoboth Freedom Ltd | Professional & scientific | 2025 |
| REJUVEN8 Performing Arts and Sports Physiotherapy Limited | Extraterritorial | 2015 |
| Reliance Properties and Developments Ltd | Real estate | 2025 |
| Remade Agency Ltd | Information & communication | 2017 |
| Remarkable Properties Ltd | Real estate | 2024 |
| Remi Intelligence Ltd | Information & communication | 2026 |
| Rendering to Road Limited | Professional & scientific | 2016 |
| Renegade Communication Agency Limited | Administrative & support | 2018 |
| Renew Skin & Health Clinic Ltd | Health & social care | 2010 |
| Renson Maina Caterer Limited | Hospitality | 2018 |
| Rentr Limited | Information & communication | 2014 |
| RES Engineering Limited | Professional & scientific | 2026 |
| Resalve Ltd | Health & social care | 2022 |
| Resettlement Community Interest Company | Other services | 2021 |
| Residual Wealth Management Limited | Wholesale & retail | 2013 |
| Resilience Works Ltd | Professional & scientific | 2008 |
| Resilience-Recovery-Performance Systems Ltd | Other services | 2021 |
| Response Consulting (UK) Limited | Professional & scientific | 2012 |
| Results International Limited | Professional & scientific | 1996 |
| Retaind Limited | Administrative & support | 2023 |
| Retro Rehab Ltd | Wholesale & retail | 2018 |
| Reveal Property Services Ltd | Real estate | 2025 |
| Revel Holdings Limited | Real estate | 2024 |
| Revera Engineering Ltd | Professional & scientific | 2026 |
| Revival Barbers Limited | Other services | 2015 |
| Revo Agency Limited | Information & communication | 2025 |
| Revo Europe Limited | Manufacturing | 2018 |
| Revolution Performance Developments Ltd | Wholesale & retail | 2024 |
| Revverse Ltd | Wholesale & retail | 2026 |
| Reynolds Butler Ltd | Real estate | 2013 |
| Reynolds Interiors Ltd | Construction | 2023 |
| Reyousable Limited | Wholesale & retail | 2024 |
| Reyvec Engineering Design Solutions Limited | Professional & scientific | 2012 |
| RFO Fire Protection Ltd | Construction | 2023 |
| RGI Limited | Construction | 2005 |
| RGK International Ltd | Professional & scientific | 2021 |
| RGW Consulting Ltd | Professional & scientific | 2025 |
| RH Bros Transport Limited | Transport & logistics | 2021 |
| RH Consulting and Ai-Enhanced Services Ltd | Professional & scientific | 2026 |
| Rhema Residential Ltd | Real estate | 2021 |
| RHG Manor Ltd | Financial services | 2025 |
| RHI Energies Group Limited | Financial services | 2017 |
| Rhoad Holdings Ltd | Financial services | 2021 |
| Rhocom Limited | Information & communication | 1998 |
| RHP Plumbing & Heating Limited | Professional & scientific | 2011 |
| Rhyzome Networks Limited | Professional & scientific | 2015 |
| RHZ Commercial & Residential Properties Limited | Construction | 2025 |
| Richard Dando Consulting Limited | Professional & scientific | 2026 |
| Richard Gaston Ltd | Real estate | 2016 |
| Richard George Limited | Wholesale & retail | 2019 |