| Rinazdir Ltd | Wholesale & retail | 2025 |
| Rinzey Consulting Limited | Education | 2022 |
| Ripples of Hope Ltd | Hospitality | 2019 |
| Risan Engineering Limited | | 1977 |
| Riselive Limited | Wholesale & retail | 1989 |
| Rising Stars Creator Network Limited | Information & communication | 2025 |
| Risk Adjudicator Ltd | Professional & scientific | 2015 |
| Risk Consultancy Limited | Professional & scientific | 2005 |
| Risktech Consulting Ltd | Financial services | 2018 |
| Ritech Innovations (UK) Limited | Information & communication | 2004 |
| River Court Residents Association Limited | Real estate | 1996 |
| River Story Trade Ltd | Professional & scientific | 2021 |
| Riverside (Witham) Management Limited | Households | 1989 |
| Riverside Spice Limited | Hospitality | 2019 |
| Riverstone FM Limited | Administrative & support | 2023 |
| Riyadh Estates Ltd | Real estate | 2026 |
| RJ Muras Ltd | Construction | 2024 |
| RJ VIP Transfer Agency Limited | Transport & logistics | 2026 |
| RJS Motors Limited | Wholesale & retail | 2004 |
| RK Care Services Ltd | Health & social care | 2023 |
| RK Construction (Essex) Limited | Construction | 2002 |
| RK Packaging Limited | Wholesale & retail | 2018 |
| Rkcp Limited | Construction | 2015 |
| RKK Consultancy and Training Limited | Professional & scientific | 2025 |
| Rlmh Limited | Construction | 1999 |
| RLS Aviation Ltd | Transport & logistics | 2024 |
| RM Steel Fixing Ltd | Construction | 2013 |
| Rm-Uk Holdings Ltd | Transport & logistics | 2017 |
| Rmcas Limited | Financial services | 2003 |
| RMR Recruitment Limited | Administrative & support | 2005 |
| RNG UK Energy Limited | Wholesale & retail | 2025 |
| RNM Property Management Ltd | Real estate | 2024 |
| Robert E LEE Plastering Contractors Limited | Professional & scientific | 2000 |
| Robert Michael Limited | Real estate | 2006 |
| Robert Stuart Ltd. | Manufacturing | 1945 |
| Robertson E D S Limited | Administrative & support | 2004 |
| Robin Estates Solutions Ltd | Real estate | 2025 |
| Robinson & Edwards Ltd | Extraterritorial | 2013 |
| Robinson Plumber Ltd | Construction | 2025 |
| Robinson's Property Group Ltd | Real estate | 2025 |
| Robotic Training Centre Ltd | Health & social care | 2024 |
| Rocaag Limited | Other services | 2014 |
| Roccabella Limited | Real estate | 2001 |
| Rocha Global Ltd | Wholesale & retail | 2025 |
| Rochford Masonic Hall Limited | Hospitality | 1981 |
| Rock Group Investments Ltd | Financial services | 2021 |
| Rockbridge Web Ltd | Information & communication | 2017 |
| Rockingham Estates Limited | Real estate | 2003 |
| Rockpole Limited | Real estate | 2007 |
| Rockview Asset Investment Limited | Real estate | 2023 |
| Rodney Kean Limited | Professional & scientific | 2002 |
| Rodusigi Ltd | Administrative & support | 2023 |
| Roger Osborne Hairdresser | | 1991 |
| Roger Tooley Limited | Information & communication | 2002 |
| Rogers Services Limited | Administrative & support | 2007 |
| Rohpharm Limited | Wholesale & retail | 1979 |
| ROJ Coffee Limited | Hospitality | 2019 |
| Roksu Services Limited | Construction | 2019 |
| Rolabent Limited | Health & social care | 2021 |
| Rolfe Transport Limited | | 1983 |
| Rollcage Limited | Professional & scientific | 2004 |
| Romabravo Limited | Information & communication | 2002 |
| Romany Limited | Real estate | 2006 |
| Romford (Essex) Properties Limited | Construction | 1960 |
| Romford Catering Supplies Limited | Wholesale & retail | 2007 |
| Romford Construction (Woodbridge) Limited | Construction | 1985 |
| Romford Construction Company Limited | Real estate | 1946 |
| Romford Finance & Development Company Limited | Real estate | 1959 |
| Romford Football Club Limited | Arts & recreation | 1999 |
| Romford Halal Meats Limited | Manufacturing | 2002 |
| Romford Visionplus Limited | Wholesale & retail | 2000 |
| Romic Ltd | Health & social care | 2009 |
| RON Lane & Associates | | 1988 |
| RON Moody (Welding) Limited | | 1976 |
| ROOF99 Limited | Real estate | 2018 |
| Roofcliff Limited | Real estate | 2006 |
| Roofmark Limited | Construction | 2002 |
| Roofology Solutions Limited | Construction | 2025 |
| Roofright Services Ltd | Construction | 2023 |
| Rootology UK Ltd | Wholesale & retail | 2024 |
| ROS and MOS House Support Ltd | Health & social care | 2015 |
| Rose Sandwich Bar Ltd | Hospitality | 2024 |
| Roseberry Property Development Company Limited | Construction | 1985 |
| Rosemart Prime Ltd | Wholesale & retail | 2026 |
| Rosinante Hospitality Limited | Hospitality | 2024 |
| Ross Kane Ltd | Administrative & support | 2025 |
| Rotthatak Limited | Real estate | 2025 |
| Roundmast Limited | | 1976 |
| Rowan Pharma Ltd | Wholesale & retail | 2023 |
| Rowe Build & Development Limited | Construction | 2002 |
| Rowe House Limited | Professional & scientific | 2006 |
| Rowland Hall Limited | Professional & scientific | 1989 |
| Rowlands General Builders Limited | Construction | 2002 |
| Rowsell Consulting Limited | Professional & scientific | 2005 |
| Roxx Ltd | Wholesale & retail | 2018 |
| ROY H.G. Tolley Limited | Wholesale & retail | 1964 |
| Royal Terrace Limited | Other services | 1997 |
| Roydon Business Supplies Limited | Wholesale & retail | 2002 |
| RPF Corporate Holdings Ltd | Financial services | 2026 |
| RRB 2000 Limited | Construction | 2024 |