| Recruits 4 Care Limited | Administrative & support | 2021 |
| Recycle England Ltd | Water & waste | 2011 |
| Red Berry Agencies Limited | Wholesale & retail | 2013 |
| Red Box Securities Limited | Real estate | 2023 |
| Red Brick Student Lettings Ltd | Real estate | 2014 |
| Red Creative Properties Limited | Real estate | 2016 |
| Red Octofish Limited | Extraterritorial | 2022 |
| Red OR Green Optics Ltd | Professional & scientific | 2011 |
| Red Recruitment Consultants Ltd | Administrative & support | 2015 |
| Red Rose Retail Limited | Professional & scientific | 2002 |
| Red Scott Investment Limited | Real estate | 2022 |
| Red Star Pathways Limited | Administrative & support | 2026 |
| Redacre Construction Limited | Construction | 2014 |
| Redbox Partners Ltd | Information & communication | 2020 |
| Reddicap Maintenance Limited | Construction | 2020 |
| Redefined Medical Aesthetics Ltd | Other services | 2026 |
| Redfern Construction Limited | Construction | 2008 |
| Redhall Ltd | Households | 2022 |
| Redlake Consultancy (Sutton Coldfield) Ltd | Administrative & support | 2011 |
| Redland Bay Ltd | Construction | 2025 |
| Redline Medical Ltd | Hospitality | 2019 |
| Redmoore Limited | Administrative & support | 2024 |
| Redwood Claims Solution Limited | Financial services | 2022 |
| Redwood Property Management Limited | Households | 2002 |
| Reece Associates-Dental and Facial Aesthetics LLP | | 2007 |
| Reed Accountancy Limited | Professional & scientific | 2017 |
| Reeva Limited | Professional & scientific | 2000 |
| Reeves PEO Ltd | Professional & scientific | 2025 |
| Refine Housing Solutions Limited | Real estate | 2025 |
| Refine Investments Ltd | Real estate | 2025 |
| Refresh Clinics Ltd | Health & social care | 2016 |
| Refurbishment Technology Limited | Construction | 2012 |
| Regal Home Design Ltd | Construction | 2018 |
| Regal Transport Ltd | Transport & logistics | 2016 |
| Regan Court RTM Company Limited | Households | 2026 |
| Rehanced Aesthetics Ltd | Health & social care | 2023 |
| Rehman Real Estate Ltd | Real estate | 2023 |
| Reilly Group Ltd | Construction | 2023 |
| Reindeer Fantasia Limited | Administrative & support | 2006 |
| REK Consulting Ltd | Information & communication | 2012 |
| REK Property Services Ltd | Real estate | 2023 |
| Reliable Aesthetics Clinic Limited | Education | 2026 |
| Relihan Properties Limited | Real estate | 2022 |
| Reload Auto Parts Ltd | Wholesale & retail | 2020 |
| Relowecations Limited | Administrative & support | 2017 |
| Remain Creative Limited | Wholesale & retail | 2014 |
| Remembrance Limited | Extraterritorial | 1996 |
| Remo Properties Limited | Real estate | 2007 |
| REN AI Solutions Ltd | Information & communication | 2025 |
| Rennsport Motor Services Limited | Wholesale & retail | 2024 |
| Renvo Limited | Construction | 2011 |
| REP Consultancy Services Ltd | Professional & scientific | 2012 |
| Repairdata Limited | Real estate | 2000 |
| Report My Scan Ltd. | Administrative & support | 2016 |
| Request Systems Limited | Information & communication | 1997 |
| RES Capitis Holdings Limited | Financial services | 2019 |
| RES Multas Holdings Ltd | Construction | 2019 |
| RES Progressio Holdings Limited | Financial services | 2019 |
| Reshmi Khimji Limited | Health & social care | 2025 |
| Residential Heat Pumps Limited | Construction | 2019 |
| Residents at Oakdale RTM Company Limited | Households | 2011 |
| Resin System Installations Ltd | Construction | 2024 |
| Resipayroll Ltd | Health & social care | 2017 |
| Resko Ventures Limited | Real estate | 2019 |
| Resolution Financial Management Limited | Financial services | 2011 |
| Resolve Aesthetic Services Ltd | Other services | 2023 |
| Resolve Physiotherapy Limited | Health & social care | 2010 |
| Resourceright HR Limited | Administrative & support | 2017 |
| Restless Workshops Ltd | Information & communication | 2024 |
| Restore Health Solutions Limited | Health & social care | 2019 |
| Resurrection Music Ltd | Arts & recreation | 2026 |
| RET Export Limited | Wholesale & retail | 2019 |
| Retained Media Ltd | Information & communication | 2021 |
| Retford Ventures Ltd | Real estate | 2023 |
| Retrofit Alarmacar Ltd | Wholesale & retail | 2017 |
| Retzer Coffee Ltd. | Hospitality | 2014 |
| Reuben Colley Limited | Arts & recreation | 2008 |
| Revamp Enterprise Ltd | Real estate | 2020 |
| Revamp Motors Ltd | Manufacturing | 2015 |
| Revision Property Ltd | Real estate | 2016 |
| Revision Property Solutions Ltd | Construction | 2016 |
| Revive Art Studios Limited | Information & communication | 2021 |
| Revive Physiotherapy and Sports Rehabilitation Ltd | Health & social care | 2024 |
| Revolution Rotational Moulding Ltd | Manufacturing | 2025 |
| Rftronics UK Ltd | Professional & scientific | 2021 |
| RG Capital Ltd | Professional & scientific | 2019 |
| RG Medical Ltd | Health & social care | 2010 |
| Rgaj Properties Ltd | Real estate | 2022 |
| Rgby Ltd | Information & communication | 2025 |
| RGK Housing Limited | Real estate | 2024 |
| RGV Properties Ltd | Real estate | 2021 |
| RH Properties Corp Ltd | Real estate | 2021 |
| RHC Group Ltd | Professional & scientific | 2025 |
| Rhenlah Property Services Ltd | Construction | 2022 |
| Rhi-Styled Ltd | Professional & scientific | 2025 |
| Rhise Limited | Professional & scientific | 2014 |
| Rhodes (PJ) Vans Limited | Wholesale & retail | 2026 |
| Riaar Pharma Limited | Wholesale & retail | 2023 |
| Rian 32 Limited | Real estate | 2025 |
| RIC Associates Ltd | Health & social care | 2023 |