| RM Accountancy + Ltd | Professional & scientific | 2019 |
| RM Chauffeur London Limited | Transport & logistics | 2021 |
| RM Deco Limited | Construction | 2010 |
| RM Facades Ltd | Construction | 2024 |
| RM Food Trading Limited | Wholesale & retail | 2020 |
| RM Hive Limited | Wholesale & retail | 2024 |
| RM HK Property Limited | Real estate | 2025 |
| RM1 Property Ltd | Real estate | 2026 |
| RMC Agencies (London) Ltd | Wholesale & retail | 2014 |
| RMC Logistics (London) Ltd | Construction | 2021 |
| RMD Traders Limited | Construction | 2024 |
| RMG Hire Ltd. | Transport & logistics | 2019 |
| RMGROUP2022 Ltd | Wholesale & retail | 2023 |
| RMK Asian Foods Ltd | Wholesale & retail | 2026 |
| RMK Visions Ltd. | Wholesale & retail | 2020 |
| RMN Consulting & Business Advisory Limited | Professional & scientific | 2026 |
| RMN Investments UK Limited | Real estate | 2011 |
| RMN Properties UK Limited | Real estate | 2013 |
| RMS Inc Ltd | Financial services | 2023 |
| RMS Traders Ltd | Wholesale & retail | 2021 |
| Rmsl Group Ltd | Wholesale & retail | 2026 |
| Rmss Realty Ltd | Real estate | 2026 |
| RN Developments Ltd | Real estate | 2019 |
| RN Home Improvements Ltd | Construction | 2022 |
| RN Propco Ltd | Real estate | 2025 |
| Rn-Shop Ltd | Wholesale & retail | 2014 |
| RNA Associates Ltd | Wholesale & retail | 2025 |
| RNB Holding Ltd | Real estate | 2025 |
| RNC Records Ltd | Information & communication | 2012 |
| RNI Property Ltd | Real estate | 2026 |
| RNJ Recruitment Ltd | Administrative & support | 2022 |
| Rnjz Enterprises Ltd | Wholesale & retail | 2026 |
| RNK Heating Ltd | Construction | 2020 |
| RNK Maintenance Ltd | Construction | 2018 |
| Rnkb Limited | Real estate | 2021 |
| RNM Associates Ltd | Health & social care | 2016 |
| RNM Services Limited | Professional & scientific | 2007 |
| RNR Estate Limited | Real estate | 2015 |
| RNS Accountant Ltd | Professional & scientific | 2023 |
| RNU Consultancy Ltd | Real estate | 2015 |
| Rnyg Invest Limited | Real estate | 2026 |
| Rnyg London Limited | Construction | 2014 |
| RNZ Estates Limited | Real estate | 2017 |
| RO Collections Ltd | Wholesale & retail | 2025 |
| Road Skills School Limited | Education | 2024 |
| Roadside Assistance Ltd | Manufacturing | 2026 |
| Roadside Vehicle Security Ltd | Wholesale & retail | 2026 |
| Roadsmart Tyre Limited | Wholesale & retail | 2025 |
| Roam Green Limited | Administrative & support | 2016 |
| Roban Transport Ltd | Transport & logistics | 2023 |
| Robb & Sons Limited | Hospitality | 2004 |
| Robert Building Ltd | Construction | 2019 |
| Robert Universal Construction Ltd | Construction | 2021 |
| Robertlaszlospulnyik Limited | Transport & logistics | 2021 |
| Robicon Ltd | Construction | 2021 |
| Robinson Electrical 24/7 Ltd | Manufacturing | 2025 |
| Robinson Essential Ltd | Wholesale & retail | 2024 |
| Robinson Plumber 24/7 Ltd | Construction | 2025 |
| Robinson Rail Services Ltd | Construction | 2023 |
| Robinson Rose Entertainment Ltd | Hospitality | 2021 |
| Robinson Sterling SBU Limited | Professional & scientific | 2018 |
| Robot Vampire Ltd | Information & communication | 2024 |
| Robotic Kebab Grill Ltd | Manufacturing | 2021 |
| Robson Morrow Ltd | Other services | 2010 |
| Robson Sterling GB Ltd | Administrative & support | 2017 |
| Robtam Limited | Construction | 2019 |
| Robust Accountants Limited | Professional & scientific | 2020 |
| Robust Plumbing Ltd | Construction | 2026 |
| Robvilla Ltd | Other services | 2019 |
| Robynne Placements Limited | Administrative & support | 2017 |
| ROC 'N Rope Rigging Limited | Other services | 2021 |
| ROC Capital Markets Limited | Financial services | 2019 |
| ROC Estates Ltd | Real estate | 2019 |
| ROC Sweets Limited | Wholesale & retail | 2019 |
| Rochem Ltd. | Wholesale & retail | 2002 |
| Rochford Tyres & Exhausts Limited | Wholesale & retail | 1994 |
| Rochvilles & Co. Accountants Ltd | Professional & scientific | 2006 |
| Rocis Bloodstock Limited | Agriculture & fishing | 2025 |
| Rock Audit Ltd | Professional & scientific | 2014 |
| Rock Co Finish Ltd | Manufacturing | 2015 |
| Rock Gems Limited | Wholesale & retail | 2008 |
| Rock Managed Services Limited | Information & communication | 2015 |
| Rock of Ages Health Ltd | Health & social care | 2014 |
| Rock on Music Limited | Arts & recreation | 2011 |
| ROCK2 Consulting Limited | Professional & scientific | 2012 |
| Rocka Ltd | Other services | 2013 |
| Rockau Properties Limited | Real estate | 2022 |
| Rocket Stride Ltd | Professional & scientific | 2020 |
| Rocketsonic Limited | Wholesale & retail | 2024 |
| Rockley Properties Ltd | Real estate | 2023 |
| Rockley Roofing Ltd | Construction | 2025 |
| Rockpeach Ltd | Wholesale & retail | 2024 |
| Rockshoot Studios Ltd | Information & communication | 2024 |
| Rockstar Global Holdings Ltd | Financial services | 2025 |
| Rockstar Prop 1 Limited | Real estate | 2020 |
| Rockstar Prop 10 Limited | Real estate | 2021 |
| Rockstar Prop 11 Limited | Real estate | 2021 |
| Rockstar Prop 13 Limited | Real estate | 2021 |
| Rockstar Prop 14 Limited | Real estate | 2021 |
| Rockstar Prop 17 Limited | Real estate | 2022 |