| Rising Stars JD Limited | Other services | 2019 |
| Risk Impact Ltd | Public administration | 2023 |
| Ritaz Limited | Health & social care | 2016 |
| Ritchie & Shirley Ltd | Real estate | 2024 |
| Ritik Construction Limited | Construction | 2026 |
| Rival Colour Limited | Manufacturing | 1990 |
| Rival Print Management Limited | Manufacturing | 2011 |
| River Blue Investments Ltd | Real estate | 2020 |
| River Flame Ltd | Wholesale & retail | 2025 |
| Riverbrook Ventures Limited | Wholesale & retail | 2016 |
| Riverside Dart Ltd | Transport & logistics | 2023 |
| Riverside Timber Recycling Project | Water & waste | 2017 |
| Rivn Constructions Limited | Construction | 2025 |
| Rivson Holdings Ltd | Public administration | 2025 |
| Riwaayat Catering Ltd | Hospitality | 2024 |
| Rixxon Limited | Information & communication | 2020 |
| RIZ Solutions Ltd | Other services | 2025 |
| Rizzeeliant Limited | Information & communication | 2026 |
| RJ Domestic Cleans Ltd | Administrative & support | 2024 |
| RJ Hiring Solutions Ltd | Administrative & support | 2023 |
| RJ Real Estate Limited | Real estate | 2018 |
| RJC Securities Limited | Real estate | 2012 |
| RJH Mechanical Services Ltd | Construction | 2018 |
| RK Enterprises London Ltd | Administrative & support | 2021 |
| RK Hair and Beauty Ltd | Other services | 2019 |
| RK Metal Work Ltd | Construction | 2024 |
| RK Prime Speed X Ltd | Transport & logistics | 2026 |
| RK Salon Ltd | Other services | 2021 |
| RKG Independent Living Ltd | Health & social care | 2019 |
| RKP Sales Limited | Wholesale & retail | 2022 |
| RL Boost Ltd | Construction | 2017 |
| RL Interiors Ltd | Construction | 2015 |
| RLS Creative Services Limited | Professional & scientific | 2013 |
| Rltrades Ltd | Financial services | 2024 |
| RM Brber 1 Ltd | Other services | 2026 |
| RM Catering London Ltd | Hospitality | 2025 |
| RM External Walls Limited | Construction | 2025 |
| RM Print Group Limited | Wholesale & retail | 2012 |
| RM Shops Limited | Wholesale & retail | 2024 |
| RM Solutions (Global) Ltd | Administrative & support | 2016 |
| RM1 Foods & Butchers Ltd | Wholesale & retail | 2024 |
| RM1 Food’S Ltd | Wholesale & retail | 2023 |
| RM1 Restaurant Ltd | Hospitality | 2025 |
| RM10 Airspace Limited | Construction | 2023 |
| RM2 Flooring Centre Ltd | Wholesale & retail | 2019 |
| RM3 Cafe Ltd | Hospitality | 2026 |
| RM3 Properties Ltd | Real estate | 2017 |
| RM3 Spice Ltd | Hospitality | 2026 |
| RM5 Glazing Ltd | Construction | 2024 |
| RM6 Food Ltd | Hospitality | 2025 |
| RM7 Barbers Ltd | Other services | 2023 |
| RM7 Construction Limited | Construction | 2021 |
| RMB Electrical Installations Limited | Administrative & support | 2017 |
| RMD Garage & MOT Ltd | Wholesale & retail | 2025 |
| RME INV Limited | Real estate | 2019 |
| RME Properties (Trading AS Real Move Estates) Limited | Real estate | 2014 |
| RME Property Services Ltd | Real estate | 2024 |
| RMF Civils and Rail Ltd | Construction | 2020 |
| RMK Heat Pumps & Construction Ltd | Construction | 2017 |
| RMM Decorators Limited | Construction | 2006 |
| Rmpk Ltd | Construction | 2015 |
| RMR Construct Ltd | Construction | 2009 |
| RMR Ventures Limited | Real estate | 2026 |
| RMS Grocery Stores Ltd | Wholesale & retail | 2016 |
| RN Lifts Ltd | Manufacturing | 2013 |
| RN Supplies Ltd | Wholesale & retail | 2026 |
| RNK Consultancy Limited | Professional & scientific | 2026 |
| RNT Global Ltd | Professional & scientific | 2012 |
| RNV Holdings Limited | Real estate | 2022 |
| RO Building Group Limited | Financial services | 2020 |
| RO Building Ltd | Construction | 2007 |
| RO Cladding Services Limited | Construction | 2020 |
| RO Drywall Services Limited | Construction | 2020 |
| RO Glazing Services Limited | Construction | 2020 |
| RO Render Services Limited | Construction | 2020 |
| Roadhouse Grill Ltd | Hospitality | 2017 |
| Roadrock Music International Limited | Wholesale & retail | 1993 |
| Roadrunners Lifters & Shifters Ltd | Transport & logistics | 2025 |
| Roadside Brokers Limited | Professional & scientific | 2011 |
| Roadstar Logistics Ltd | Transport & logistics | 2025 |
| Roan Roofing Ltd | Construction | 2023 |
| Robert Delaney Properties Limited | Real estate | 2010 |
| Roberta Gold Ltd | Wholesale & retail | 2025 |
| Roberts and HAW Holdings Limited | Financial services | 2016 |
| Roberts Properties Ltd | Real estate | 2025 |
| Robertson & Mathews Property Investments Ltd | Real estate | 2024 |
| Robfam Holdings Limited | Financial services | 2019 |
| Robi & Cris Ltd | Transport & logistics | 2018 |
| Robin Hood Collectibles Ltd | Wholesale & retail | 2026 |
| Robin's Nest Estates Ltd | Real estate | 2021 |
| Robinson Ravani & Co Ltd | Professional & scientific | 2020 |
| Robot Cleaning Ltd | Administrative & support | 2025 |
| Roboticsengineering Ltd | Professional & scientific | 2025 |
| Robson Investments Limited | Real estate | 2001 |
| Roby & Cryss Limited | Transport & logistics | 2016 |
| Rocel Consulting Ltd | Information & communication | 2018 |
| Rochdale Engine Parts Ltd | Wholesale & retail | 2025 |
| Rochn Ltd | Construction | 2015 |
| Rock Code Academy Ltd | Information & communication | 2023 |
| Rock Dog Limited | Wholesale & retail | 2017 |