| Ricparker Consultants Limited | Professional & scientific | 2018 |
| Ridge View Supported Living Limited | Health & social care | 2019 |
| Ridgebase Limited | Professional & scientific | 2001 |
| Ridgeway Food and Wine Ltd | Wholesale & retail | 2013 |
| RIG and Supply Limited | Manufacturing | 2015 |
| RIG Engineering Limited | Manufacturing | 2007 |
| RIG Inspection and Welding Services Ltd | Manufacturing | 2018 |
| Riga Minimarket Ltd | Wholesale & retail | 2024 |
| Rigby & Co (UK) Limited | Real estate | 2006 |
| Right Advice Limited | Financial services | 2004 |
| Right Care Services Ltd | Health & social care | 2019 |
| Right Care Services SH CIC | Health & social care | 2019 |
| Right Estate Agents Cuffley and Goffs Oak Limited | Real estate | 2017 |
| Right Legal Group Limited | Professional & scientific | 2012 |
| Right Roost Ltd | Real estate | 2020 |
| Right Tracks Enterprise Ltd | Construction | 2023 |
| RIGHTAGENT4YOU Ltd | Arts & recreation | 2011 |
| Rightfully Ltd | Information & communication | 2026 |
| Rightnarrowboat Ltd | Manufacturing | 2011 |
| Rihana Restaurant Limited | Hospitality | 2025 |
| Rikkers Developments Limited | Construction | 2022 |
| Rikkers Leisure Limited | Hospitality | 2024 |
| Rikshaw Indian Street Food Group Limited | Hospitality | 2019 |
| Riley and Bullen Developments Ltd | Real estate | 2024 |
| Riley Automation Limited | Manufacturing | 2000 |
| Riley Product Handling Limited | Manufacturing | 2001 |
| Riley Real Estate Ltd | Financial services | 2023 |
| Riley Rubble Ltd | Manufacturing | 2025 |
| Riloworld Global Resources Ltd | Administrative & support | 2025 |
| Rimak Auto Care Ltd | Administrative & support | 2026 |
| Ring Removal Ltd | Transport & logistics | 2025 |
| Rinkal Limited | Transport & logistics | 2023 |
| RIO Ceramics Ltd | Wholesale & retail | 2025 |
| Ripley Shoe Repairs, Locksmiths, Keys & Security Ltd | Other services | 2023 |
| Riqc Limited | Professional & scientific | 1995 |
| Risa London Ltd | Wholesale & retail | 2025 |
| Rise & Align Coaching Ltd | Administrative & support | 2026 |
| Rise & Build Co Ltd | Construction | 2025 |
| Rise Midland Ltd | Construction | 2023 |
| Rise Resources (Holdings) Ltd | Agriculture & fishing | 2015 |
| Rise Retail Ltd | Wholesale & retail | 2026 |
| RISE125 Ltd | Professional & scientific | 2023 |
| Riselei Properties Limited | Real estate | 2013 |
| Riselei Property Holdings Limited | Financial services | 2013 |
| Rishi UK Enterprise Ltd | Wholesale & retail | 2025 |
| Rising Phoenix Property Renovations Ltd | Real estate | 2025 |
| Rising Stars Sports Group Ltd | Arts & recreation | 2024 |
| Rising Sun Trading Derby Ltd | Wholesale & retail | 2021 |
| Risk and Compliance Matters Limited | Professional & scientific | 2013 |
| Risk Assessment Solutions Ltd | Other services | 2006 |
| Risk Guardians Ltd | Extraterritorial | 2024 |
| Riskwell Limited | Professional & scientific | 2020 |
| Risley Direct Ltd | Wholesale & retail | 2024 |
| Risley Management Limited | Real estate | 2004 |
| Risley Property Cleaning Limited | Administrative & support | 2022 |
| Risley Property Management Company Limited | Real estate | 2007 |
| Risual Holdings Limited | Professional & scientific | 2009 |
| Risual Limited | Information & communication | 2005 |
| Ritu Gupta Limited | Health & social care | 2011 |
| Ritz Associates Limited | Real estate | 1999 |
| River Deep Mountain High Limited | Administrative & support | 1999 |
| River Five Property Ltd | Real estate | 2020 |
| River UK Limited | Hospitality | 2008 |
| River Wharfe Properties Ltd | Real estate | 2023 |
| Rivercali Limited | Information & communication | 2013 |
| Riverside Care Home Limited | Health & social care | 2014 |
| Riverside Medical Packaging Company Limited | Manufacturing | 1979 |
| Riverside Mews 2023 Limited | Real estate | 2023 |
| Riverside Stays Ltd | Real estate | 2021 |
| Riverview Lodges Limited | Hospitality | 2011 |
| Rivet Marketing Limited | Professional & scientific | 2019 |
| RIX & Co Rocking Horses Limited | Manufacturing | 2017 |
| Rixx Properties Limited | Real estate | 2020 |
| Rixxams Bars Limited | Hospitality | 2025 |
| Riyaan Investments Limited | Real estate | 2020 |
| RIZ25 Ltd | Hospitality | 2024 |
| Rizwan Qamar Ltd | Wholesale & retail | 2025 |
| RJ Engineering Design & Manufacture Ltd | Professional & scientific | 2021 |
| RJ Engineering Group Ltd | Financial services | 2021 |
| RJ Engineering Processes Ltd | Construction | 2021 |
| Rj's Pret Limited | Wholesale & retail | 2022 |
| RJA Investment Properties Limited | Real estate | 2020 |
| RJB Plumbing & Heating Solutions Ltd. | Construction | 2016 |
| RJC Digital Ltd | Information & communication | 2017 |
| RJC Sales Limited | Financial services | 2023 |
| RJD Employment Ltd | Administrative & support | 2025 |
| RJD Property Developments Ltd | Financial services | 2018 |
| RJE Leisure Limited | Health & social care | 2004 |
| Rjjb Ltd | Hospitality | 2026 |
| RJL Pipework Services Ltd | Construction | 2015 |
| RJM Consulting UK Limited | Professional & scientific | 2008 |
| RJM Heating Plumbing & GAS Services Limited | Construction | 2008 |
| Rjmj Properties Ltd | Construction | 2025 |
| RJS Capital Investments Ltd | Financial services | 2021 |
| RJS Consulting (GB) Limited | Professional & scientific | 2008 |
| RJY Properties Ltd | Real estate | 2017 |
| RK Automations Ltd | Information & communication | 2025 |
| RK AV Limited | Wholesale & retail | 2011 |
| RK Derby Enterprises Limited | Real estate | 2017 |
| RK Hire Limited | Administrative & support | 2025 |