| Rigour Inspection Service (R.I.S) Ltd | Professional & scientific | 2022 |
| Rigth-Era Homes & Properties Ltd | Real estate | 2024 |
| Riley Electrical Limited | Construction | 2008 |
| Riley's Property Maintenance Limited | Construction | 2025 |
| Rima Foods Ltd | Wholesale & retail | 2024 |
| Rima Global Ltd | Wholesale & retail | 2026 |
| Ringustar Ltd | Wholesale & retail | 2024 |
| Rios Leisure Limited | Arts & recreation | 2000 |
| Riptide Pools Limited | Wholesale & retail | 2007 |
| Rirgb 2014 Limited | Real estate | 2014 |
| Rirgb Limited | Real estate | 2003 |
| Risctech Ltd | Information & communication | 2025 |
| Rise & Fore Limited | Administrative & support | 2025 |
| Risl Utilities Maintenance Limited | Administrative & support | 2024 |
| Ritchcomm Limited | Administrative & support | 2003 |
| Rituh Limited | Health & social care | 2025 |
| Ritzka and SON Limited | Energy | 2024 |
| Rivdens Estates Limited | Real estate | 2023 |
| River Media Limited | Information & communication | 2021 |
| Rivera Recruitment Limited | Administrative & support | 2025 |
| Riverside Books Trustee Limited | Financial services | 2023 |
| Riverside Building Supplies Limited | Wholesale & retail | 2001 |
| Riverside Cleaning Services Limited | Professional & scientific | 2015 |
| Riverside Estimating Services Ltd | Construction | 2024 |
| Riverside Plumbing & Heating (Maldon) Ltd | Construction | 2024 |
| Riverside Skin & Laser Clinic Limited | Health & social care | 2022 |
| Rivington Press Holdings Limited | Financial services | 2008 |
| Rivington Press Limited(The) | Manufacturing | 1981 |
| RIZ Remit Limited | Financial services | 2019 |
| Rizdale Limited | Administrative & support | 2019 |
| Rizex Private Ltd | Wholesale & retail | 2026 |
| Rizing International Private Limited | Wholesale & retail | 2004 |
| RJ Canine Therapy Ltd | Other services | 2025 |
| RJ Civil Engineering Ltd | Construction | 2014 |
| RJ Health Limited | Health & social care | 2010 |
| Rj-Recruitment Limited | Construction | 2014 |
| RJB Enterprises Limited | Professional & scientific | 2014 |
| RJC Consulting Limited | Financial services | 2015 |
| RJG Dwelling Solutions Ltd | Financial services | 2023 |
| RJG Mortgage Solutions Ltd | Financial services | 2020 |
| RJH Holdings Ltd | Financial services | 2022 |
| RJH Property Solutions Ltd | Hospitality | 2025 |
| Rjlcarpentry Ltd | Manufacturing | 2022 |
| RJM Lettings Limited | Real estate | 2014 |
| RJN Trading Ltd | Wholesale & retail | 2025 |
| RJS Commercials Limited | Extraterritorial | 2003 |
| RJS Consulting Group Limited | Information & communication | 2017 |
| RJS Properties (Essex) Limited | Real estate | 2005 |
| RJW Financial & Accounting Ltd | Professional & scientific | 2017 |
| RK Assets Limited | Real estate | 2020 |
| RK Cleaning Ltd | Administrative & support | 2026 |
| RK Global Tech Limited | Information & communication | 2024 |
| RK Self Storage Limited | Real estate | 2025 |
| RKA Telecoms Ltd | Construction | 2022 |
| Rkaas Outlet Ltd | Wholesale & retail | 2021 |
| RKC Plumbing and Heating Ltd | Construction | 2025 |
| RKP and Sons Limited | Construction | 2001 |
| RLA Automotive Limited | Wholesale & retail | 2025 |
| RLC Holdings UK Ltd | Financial services | 2026 |
| Rlgtech Limited | Information & communication | 2010 |
| RLM Recruit Limited | Administrative & support | 2019 |
| Rlrl Rental Ltd | Real estate | 2021 |
| RM Collections Ltd | Transport & logistics | 2026 |
| RM Drywall Ltd | Construction | 2019 |
| RM Fuel& Retail Ltd | Wholesale & retail | 2026 |
| RM Swimming Pool & Spa Specialists Ltd | Construction | 2026 |
| RMB Coaching Ltd | Arts & recreation | 2021 |
| RMC Construction Services Ltd | Other services | 2026 |
| RMF Property Ltd | Real estate | 2020 |
| RMG Waste Ltd | Water & waste | 2024 |
| Rminteriors Ltd | Professional & scientific | 2026 |
| Rmjs Services Ltd | Information & communication | 2023 |
| RMS Finance Consulting Limited | Professional & scientific | 2025 |
| RNB Couriers Ltd | Transport & logistics | 2019 |
| RNB2 UK Ltd | Wholesale & retail | 2026 |
| RNT Property Limited | Construction | 2022 |
| ROA 61 Ltd | Real estate | 2026 |
| Roadregen Ltd | Construction | 2026 |
| Roar Tech Group Limited | Extraterritorial | 2024 |
| Roasta Limited | Construction | 2016 |
| Roasted Chelmsford Ltd | Hospitality | 2025 |
| ROB J Goddard Ltd | Wholesale & retail | 2024 |
| ROB MAN and Van Ltd | Transport & logistics | 2026 |
| Robert Ashworth Services Ltd | Other services | 2021 |
| Robert Barker Limited | Professional & scientific | 2008 |
| Robert Hanaghan Mentoring Limited | Other services | 2021 |
| Robert Heslop Trading Limited | Professional & scientific | 2011 |
| Roberts Design Ltd | Manufacturing | 2008 |
| Roberts Homes (Essex) Ltd | Construction | 2014 |
| Robicor Consulting Ltd | Other services | 2024 |
| Robin Dixon & Co. Limited | Real estate | 2003 |
| Robin K. UK Ltd | Extraterritorial | 2016 |
| Robinson ER Ltd | Health & social care | 2021 |
| Robinson Webster Limited | Real estate | 2016 |
| Robottom Developments Limited | Construction | 2000 |
| Robson Everett East Ltd | Professional & scientific | 2021 |
| Robson Everett Limited | Professional & scientific | 2022 |
| Robson Grace Holdings Limited | Financial services | 2024 |
| Robson Telecom Limited | Information & communication | 2014 |
| Rochelle Alliance Limited | Hospitality | 2020 |