| Riyan Logistics Limited | Transport & logistics | 2025 |
| Riyvani Limited | Real estate | 2021 |
| Rizdex Holdings Limited | Real estate | 2023 |
| Rizdex Ltd | Information & communication | 2018 |
| Rizer 16 Ltd | Hospitality | 2025 |
| Rizk Clothing Limited | Manufacturing | 2015 |
| RJ Collection Ltd | Wholesale & retail | 2018 |
| RJ Home Maintenance Ltd | Other services | 2020 |
| RJ Recovery Ltd | Wholesale & retail | 2021 |
| RJT Residentials Limited | Real estate | 2019 |
| RK Group Holdings Ltd | Real estate | 2022 |
| RK Logistics Express Limited | Transport & logistics | 2025 |
| RK Repair Hub Ltd | Wholesale & retail | 2026 |
| RKP Ventures Ltd | Education | 2025 |
| RKV Enterprise Limited | Real estate | 2022 |
| RL Property Lettings Limited | Real estate | 2024 |
| RME Optima Properties Limited | Real estate | 2025 |
| RMS Utility Ltd | Construction | 2023 |
| RN London Constructions Ltd | Construction | 2024 |
| RN Railway Limited | Construction | 2017 |
| RNA Limited | Wholesale & retail | 2005 |
| RNP Properties Limited | Construction | 2011 |
| RNS Wellwishers | Other services | 2023 |
| Rnsp Group Limited | Information & communication | 2017 |
| RNV Construction Ltd | Construction | 2015 |
| RO Wood Ltd. | Construction | 2017 |
| Ro&Ni Limited | Administrative & support | 2019 |
| Road Buddy Midlands Ltd | Wholesale & retail | 2024 |
| Road Tech Motors Ltd | Professional & scientific | 2023 |
| Road Transport Connection Limited | Transport & logistics | 2016 |
| Roadside Kitchen Ltd | Hospitality | 2023 |
| Robal Homes Ltd | Real estate | 2006 |
| Robert F Limited | Construction | 2024 |
| Robert Lehrer Limited | Real estate | 2005 |
| Roberta Service Limited | Construction | 2018 |
| Robest Technologies Limited | Information & communication | 2012 |
| Robin Engineering Ltd | Construction | 2008 |
| Robinson Glazing Services Ltd | Construction | 2012 |
| ROC Capital Partners Limited | Financial services | 2012 |
| Rock Global Investment Network Ltd | Administrative & support | 2017 |
| Rock Turf Estates Ltd | Real estate | 2025 |
| Rockemar Investments Limited | Real estate | 1966 |
| Rocketears Ltd | Information & communication | 2021 |
| Rockingham SE1 Limited | Real estate | 2023 |
| Roco Advisors Limited | Professional & scientific | 2018 |
| Rodent Rangers Limited | Administrative & support | 2024 |
| Roding Investments Ltd | Real estate | 2017 |
| Rogers Removals (Finchley) Limited | Extraterritorial | 2010 |
| Rokan Corporation Limited | Real estate | 1983 |
| Rokit Limited | Wholesale & retail | 1986 |
| Rokit Properties Limited | Construction | 2013 |
| Rolbury Limited | Professional & scientific | 2025 |
| Roleplay Solutions Ltd | Education | 2014 |
| Rollball Limited | Administrative & support | 2012 |
| Rolop Limited | Professional & scientific | 2009 |
| Roma Slice Limited | Hospitality | 2026 |
| Romail Dentax Limited | Health & social care | 2021 |
| Roman Locum Services Ltd | Professional & scientific | 2017 |
| Romana Delights Ltd | Hospitality | 2025 |
| Romanian Shop Bacau Ltd | Wholesale & retail | 2025 |
| Romano Automotives Ltd | Wholesale & retail | 2024 |
| Romav Holdings UK Ltd | Transport & logistics | 2016 |
| Romav Shipping & Logistics (UK) Limited | Transport & logistics | 1997 |
| Romcon Limited | Construction | 2016 |
| Romeart Limited | Professional & scientific | 2013 |
| Rominos Pizza 62 Ltd | Hospitality | 2026 |
| Roneli Ltd | Administrative & support | 2020 |
| ROO Interiors Ltd | Construction | 2024 |
| Roohullah Limited | Hospitality | 2026 |
| Ropel Properties Limited | Real estate | 1964 |
| Roqberry Ltd | Wholesale & retail | 2017 |
| Rorofide Catering Ltd | Hospitality | 2022 |
| ROS Altmann Limited | Extraterritorial | 2013 |
| Rosa AM Ltd | Financial services | 2021 |
| Rosana Property Ltd | Real estate | 2020 |
| Rosary View CIC | Real estate | 2025 |
| Rose & Bramley Ltd | Wholesale & retail | 2023 |
| Rose & Samite Ltd | Wholesale & retail | 2022 |
| Rose and Charles Properties Limited | Real estate | 2025 |
| Rose Between Two Thorns Ltd | Wholesale & retail | 2025 |
| Rose in Sky Ltd | Wholesale & retail | 2024 |
| Rosemore Estates Limited | Real estate | 2024 |
| Rosemore Residential Limited | Real estate | 2021 |
| Rosenberg & Associates Limited | Professional & scientific | 2010 |
| Rosens BTA Limited | Real estate | 2012 |
| Rosetrees Nominees Limited | Extraterritorial | 1971 |
| Rosewood Florals Ltd | Wholesale & retail | 2025 |
| Roshan's Kitchen Holborn Limited | Hospitality | 2024 |
| Roshel Limited | Wholesale & retail | 2018 |
| Roshni International Ltd | Wholesale & retail | 2021 |
| Rosie Construction Ltd | Construction | 2024 |
| Rosmery Ltd | Health & social care | 2025 |
| Ross PPC Services Ltd | Administrative & support | 2022 |
| Rostaylor Properties Limited | Construction | 1955 |
| Rostev Holdco Ltd | Financial services | 2016 |
| Rostev Limited | Real estate | 1996 |
| Rotar Ionel Ltd | Construction | 2025 |
| Rotary Tibi Ltd | Manufacturing | 2021 |
| ROU Ltd | Transport & logistics | 2020 |
| Roughnight Limited | Other services | 2024 |