| Repready Limited | Professional & scientific | 2016 |
| Repton Consulting Limited | Professional & scientific | 2000 |
| Reshna Food & Wine Ltd | Wholesale & retail | 2026 |
| Resi Rehab Limited | Other services | 2025 |
| Residential & Commercial Mortgages Limited | Financial services | 1997 |
| Residential Loans Ltd. | Financial services | 1998 |
| Resilient Joy Coaching Ltd | Administrative & support | 2025 |
| Resilient Minds Matter Ltd | Education | 2025 |
| Resistenza Limited | Information & communication | 2012 |
| Resmaster Limited | Information & communication | 2026 |
| Resonix Ltd | Health & social care | 2024 |
| Respect Clothing Ltd | Wholesale & retail | 2012 |
| Restaurant Real Estate Limited | Real estate | 2011 |
| Retail Connections Limited | Information & communication | 2013 |
| Retail Plus Group Ltd | Information & communication | 2023 |
| Retails V Limited | Wholesale & retail | 2025 |
| Retro Property Investment Ltd | Real estate | 2020 |
| Return Your Tax Limited | Professional & scientific | 2014 |
| Reva Fashions Limited | Wholesale & retail | 2017 |
| Revgopro Ltd | Hospitality | 2026 |
| REX Properties and Maintenance Ltd | Other services | 2019 |
| Rexbourne Limited | Professional & scientific | 2005 |
| Reya Design and Build Ltd | Construction | 2020 |
| Reyansh Colourchem Limited | Manufacturing | 2018 |
| Rezwan Hayat Ltd | Administrative & support | 2026 |
| RF Services Limited | Transport & logistics | 2026 |
| RFM Consults Ltd | Professional & scientific | 2025 |
| RFY Group Ltd | Real estate | 2026 |
| RG Propco Limited | Financial services | 2021 |
| Rgem Corporation Ltd | Education | 2026 |
| RGH Hotels Limited | Hospitality | 2006 |
| RGM 77 Limited | Construction | 2018 |
| RGM Properties Ltd | Real estate | 1999 |
| RGT Performance Ltd | Wholesale & retail | 2023 |
| RGY Glass Solution Ltd | Construction | 2023 |
| RHD Procurement Services Limited | Professional & scientific | 2017 |
| RHD99 Limited | Hospitality | 2026 |
| Rhena Services Limited | Professional & scientific | 2025 |
| RHH Tech Services Ltd | Information & communication | 2022 |
| Rhino Services Ltd | Other services | 2008 |
| Rhomboid Ltd | Professional & scientific | 2023 |
| Rian Properties Limited | Real estate | 1960 |
| Ribsa Limited | Administrative & support | 2008 |
| Ricar Motors Ltd | Wholesale & retail | 2023 |
| Richard Archer Property Investments Limited | Real estate | 2010 |
| Richard Archer Property Trading Limited | Construction | 2001 |
| Richard Benjamin & Company Ltd | Professional & scientific | 2026 |
| Richbrook Limited | Professional & scientific | 2009 |
| Richday Limited | Professional & scientific | 2006 |
| Richdon Recycling Limited | Wholesale & retail | 2024 |
| Richie’S Mobile Tyre Service Ltd | Manufacturing | 2023 |
| Richlands Business Advisers Limited | Professional & scientific | 2018 |
| Richmond-Radhakrishnan Creative Consultancy Limited | Administrative & support | 2025 |
| Richold Freehold Limited | Real estate | 1987 |
| Rickymac Movie Ltd | Information & communication | 2017 |
| Ricop Properties Limited | Real estate | 2025 |
| Ride Car Solutions Limited | Transport & logistics | 2019 |
| Ridge Estates Ltd | Real estate | 2025 |
| Ridgehigh Limited | Real estate | 2022 |
| Ridgeway Close Limited | Households | 2025 |
| Ridgway Investments Limited | Real estate | 2015 |
| Ridiculusmus Theatre Company | Arts & recreation | 1993 |
| Riding Transport Ltd | Transport & logistics | 2025 |
| Rifcor Limited | Professional & scientific | 2025 |
| Riiroo Limited | Manufacturing | 2015 |
| Riker Solutions Limited | Information & communication | 2021 |
| Rilmark Limited | Professional & scientific | 2025 |
| Rilmere Limited | Professional & scientific | 2025 |
| Rilwil Properties Limited | Real estate | 1947 |
| Rimaki Limited | Administrative & support | 2017 |
| Rindustry Ltd | Administrative & support | 2018 |
| Rini Enterprises Limited | Wholesale & retail | 1996 |
| Rinya Limited | Real estate | 2026 |
| RIO Freight Ltd | Transport & logistics | 2024 |
| RIO General Construction Limited | Construction | 2016 |
| Rise Build Limited | Construction | 2022 |
| Rise Media Limited | Information & communication | 2011 |
| Rise Property Consultancy Limited | Professional & scientific | 2019 |
| Risham Property Services Limited | Real estate | 2021 |
| Rishul Shah Ltd | Health & social care | 2011 |
| Rising High Ltd | Wholesale & retail | 2026 |
| Riskvantage Ltd | Professional & scientific | 2024 |
| Ristan Limited | Administrative & support | 2005 |
| Risus Dent Limited | Health & social care | 2024 |
| Ritz Ventures Ltd | Transport & logistics | 2018 |
| River Autos Limited | Wholesale & retail | 2024 |
| River HL 1 Limited | Financial services | 2022 |
| River HL 1AA Limited | Real estate | 2022 |
| River SI 1 Limited | Financial services | 2021 |
| River SI 1A Limited | Real estate | 2021 |
| River SI 2 Limited | Financial services | 2023 |
| River SI 2A Limited | Real estate | 2023 |
| River SI 3 Limited | Real estate | 2023 |
| River SI 3A Limited | Real estate | 2023 |
| River SI 4 Limited | Financial services | 2024 |
| River SI 4 Midco Limited | Financial services | 2024 |
| River SI 4A Limited | Real estate | 2024 |
| Riverflood (London) Limited | Transport & logistics | 2007 |
| Riya Chrysalis Properties Limited | Real estate | 2023 |
| Riya P Healthcare Limited | Health & social care | 2021 |