| Rjdmarketing Ltd | Administrative & support | 2022 |
| RJE Risk Consultants Ltd | Professional & scientific | 2019 |
| RJH CAD Engineering Limited | Professional & scientific | 2016 |
| RJH Consultancy Limited | Administrative & support | 2025 |
| RJH Engineering Services Limited | Administrative & support | 2024 |
| RJH Inspection Services Limited | Construction | 2023 |
| RJL & Co Holdings Limited | Other services | 2015 |
| RJM Moss Limited | Administrative & support | 2011 |
| RJN Consulting Ltd | Administrative & support | 2026 |
| Rjrm Holdings Limited | Financial services | 2025 |
| RJS Consulting Services Ltd | Administrative & support | 2026 |
| RJS IT Limited | Administrative & support | 2025 |
| RJTM369 Ltd | Wholesale & retail | 2025 |
| RK ENT Ltd | Professional & scientific | 2025 |
| RK Food Safety Consultancy Limited | Professional & scientific | 2025 |
| RK Global Limited | Wholesale & retail | 2024 |
| RK Roofing Services Ltd | Construction | 2023 |
| Rk.Landscape & Design Ltd | Construction | 2025 |
| RKB Enterprises Ltd | Professional & scientific | 2016 |
| RKF Design Holdings Limited | Financial services | 2022 |
| RKF Design Ltd. | Manufacturing | 2021 |
| RKF Developments Limited | Real estate | 2024 |
| RKH Associates Ltd | Professional & scientific | 2022 |
| RKH Technologies Limited | Information & communication | 2020 |
| RKN Consultancy Ltd | Information & communication | 2019 |
| RKR Ventures Ltd | Information & communication | 2019 |
| Rkways Ltd | Information & communication | 2018 |
| RL Advisory Ltd | Professional & scientific | 2022 |
| RLC Mechanical Services Ltd | Administrative & support | 2025 |
| RLI Consultancy Limited | Real estate | 2014 |
| RLO3 Limited | Administrative & support | 2025 |
| RLP Expertise Limited | Information & communication | 2018 |
| RM + SJ Jones LLP | | 2004 |
| RM Controls Ltd | Information & communication | 2021 |
| RM Geoscience Ltd | Administrative & support | 2025 |
| RM Highways Ltd | Administrative & support | 2019 |
| RM Joinery Ltd | Construction | 2022 |
| RM Management Consultancy Limited | Professional & scientific | 2023 |
| RM PM Solutions Ltd | Administrative & support | 2021 |
| RM Source Ltd | Wholesale & retail | 2025 |
| RM Sustainability Consulting Ltd | Administrative & support | 2023 |
| RM Writing & Consultancy Services Limited | Information & communication | 2017 |
| Rmak Technical Solutions Ltd | Construction | 2025 |
| Rmam Limited | Administrative & support | 2026 |
| RMB Consultants Ltd | Professional & scientific | 2025 |
| RMB7FINANCE Ltd | Professional & scientific | 2022 |
| RMG Design Ltd | Administrative & support | 2023 |
| Rmgh Limited | Real estate | 2016 |
| RMH Trading Ltd | Agriculture & fishing | 2026 |
| RMI Cyber Limited | Other services | 2022 |
| RMM Engineering Ltd | Administrative & support | 2022 |
| RMS Plant Services Ltd | Manufacturing | 2019 |
| RMS2 Limited | Information & communication | 2020 |
| RMT Distributions Ltd | Wholesale & retail | 2026 |
| RMT Safety Solutions Ltd | Wholesale & retail | 2021 |
| RMT Solutions Ltd | Professional & scientific | 2012 |
| Rmts Medical Ltd | Health & social care | 2024 |
| Rmuk Associates Ltd | Information & communication | 2019 |
| Rmunro Ltd | Information & communication | 2022 |
| RMW Consultancy Services Limited | Administrative & support | 2014 |
| RN Telecoms Ltd | Construction | 2023 |
| RNB Refurbs and New Builds Ltd | Professional & scientific | 2018 |
| Rnes Services Ltd | Professional & scientific | 2022 |
| RNS Engineering Solutions Limited | Administrative & support | 2011 |
| RNS Logistics Ltd | Transport & logistics | 2022 |
| RNW Developments Ltd | Construction | 2025 |
| Road Zero Ltd | Professional & scientific | 2018 |
| ROAD2RESOLVE Ltd | Administrative & support | 2021 |
| Roam Accounting Ltd | Professional & scientific | 2022 |
| Roant Precision Engineering Limited | Manufacturing | 2013 |
| ROB Leighton Authoring Ltd | Administrative & support | 2025 |
| ROB Mclean Limited | Information & communication | 2014 |
| Rob's Allotment Ltd | Administrative & support | 2016 |
| Rob-Sa Logistics Ltd | Transport & logistics | 2025 |
| Robert Ayton Consultancy Limited | Administrative & support | 2012 |
| Robert Cartlidge Software Limited | Information & communication | 2014 |
| Robert Christopher Hughes Music Ltd | Information & communication | 2025 |
| Robert Cook Construction Ltd | | 2009 |
| Robert Copley Limited | Real estate | 1998 |
| Robert COX Consulting Limited | Information & communication | 2020 |
| Robert Shields Technical Services Limited | Administrative & support | 2013 |
| Robert Taylor Engineering Services Limited | Professional & scientific | 2017 |
| Robert Z Limited | Professional & scientific | 2017 |
| Roberts & Co Pizza Ltd | Hospitality | 2025 |
| Roberts Aviation Ltd | Administrative & support | 2026 |
| Roberts Cleaning Services Limited | Administrative & support | 2025 |
| Roberts Cost Consultancy Limited | Administrative & support | 2011 |
| Roberts Housing Limited | Real estate | 2022 |
| Roberts Procurement Solutions Ltd | Administrative & support | 2026 |
| Roberts QP Services Ltd | Professional & scientific | 2019 |
| Robertson and Marston Tuition Limited | Education | 2021 |
| Robin & Co UK Limited | Wholesale & retail | 2026 |
| Robin Buckle Urban Design Limited | Professional & scientific | 2018 |
| Robin Pembs Ltd | Administrative & support | 2026 |
| Robin Song Consulting Limited | Administrative & support | 2023 |
| Robinson Cleaning Services Ltd | Administrative & support | 2025 |
| Robinson Energy Services Limited | Mining & quarrying | 2025 |
| Robinson Group Ltd | Extraterritorial | 1961 |
| Robinson Joinery Limited | Construction | 2003 |
| Robinsons Electrical Ltd | Construction | 2020 |