| RJK Environmental Consulting Limited | Professional & scientific | 2023 |
| RKH GEO Services Limited | Professional & scientific | 2008 |
| RKO Hospitality and Marketing Services Limited | Hospitality | 2017 |
| RKS Cleaning Ltd | Administrative & support | 2025 |
| RKS MCR Ltd | Real estate | 2019 |
| RL Coffee Services Ltd | Manufacturing | 2021 |
| RLA Developments (NW) Ltd | Real estate | 2017 |
| RLO Sandri Ltd | Information & communication | 2026 |
| RLS House Ltd | Professional & scientific | 2017 |
| RLW Investments Ltd | Households | 2025 |
| RM (Altrincham) Limited | Extraterritorial | 2011 |
| RM (Brightside) Limited | Extraterritorial | 2010 |
| RM (Colchester) Limited | Extraterritorial | 2011 |
| RM (Leeds) Limited | Extraterritorial | 2010 |
| RM (Northampton) Limited | Extraterritorial | 2011 |
| RM Auto Service Ltd | Wholesale & retail | 2024 |
| RM Bodyshop Limited | Wholesale & retail | 2025 |
| RM Rochdale Ltd | Extraterritorial | 2025 |
| RMD Estates Limited | Other services | 2019 |
| Rmillmead Ltd | Real estate | 2018 |
| Rmmbry Ltd | Real estate | 2023 |
| Rmuk Group Ltd | Wholesale & retail | 2021 |
| RMV Cargo Ltd | Wholesale & retail | 2019 |
| RN Law Products Ltd | Professional & scientific | 2026 |
| RNE Estates Ltd | Real estate | 2025 |
| RNH Synagogue & College Ltd | Other services | 2008 |
| Roadax Ltd | Wholesale & retail | 2024 |
| Roam Labs Ltd | Information & communication | 2026 |
| Roam Running Limited | Wholesale & retail | 2025 |
| Roar Cleaning Ltd | Administrative & support | 2023 |
| Robaz Global Ltd | Wholesale & retail | 2026 |
| Robert & Partners Construction Limited | Construction | 2016 |
| Robinson Estates (NW) Limited | Real estate | 2023 |
| Robinson Wholesale LLP | | 2006 |
| Robson Group Ltd | Wholesale & retail | 2026 |
| Rocha Company Store Limited | Wholesale & retail | 2024 |
| Rochdale Solutions Limited | Extraterritorial | 2021 |
| Rock N Roller Limited | Wholesale & retail | 2016 |
| Rockbury Holdings Limited | Other services | 2023 |
| Rockerbox Limited | Construction | 2019 |
| Rockerfield Ltd | Real estate | 2019 |
| Rocketphone Limited | Financial services | 2023 |
| Rocketphone.Ai Limited | Information & communication | 2015 |
| Rocketstone Ltd | Extraterritorial | 1999 |
| Rockstead Building Services Ltd | Construction | 2009 |
| Roco Attire Ltd | Wholesale & retail | 2025 |
| Roddy New Homes Construction Limited | Construction | 2022 |
| Roddy New Homes Limited | Construction | 2019 |
| Roddy New Homes SPV 10 Limited | Construction | 2025 |
| Roddy New Homes SPV 3 Limited | Construction | 2023 |
| Roddy New Homes SPV 4 Limited | Construction | 2023 |
| Roddy New Homes SPV 5 Limited | Construction | 2023 |
| Roddy New Homes SPV 6 Limited | Construction | 2023 |
| Roddy New Homes SPV 7 Limited | Construction | 2024 |
| Roddy New Homes SPV 8 Limited | Construction | 2024 |
| Roddy New Homes SPV 9 Limited | Construction | 2025 |
| Roddy New Homes SPV1 Limited | Construction | 2022 |
| Roddy New Homes SPV2 Limited | Construction | 2022 |
| Rodna Rech Salford CIC | Education | 2025 |
| Rodville Limited | Extraterritorial | 1995 |
| Rogermain Limited | Real estate | 1983 |
| Rogers Waste Services Ltd | Water & waste | 2017 |
| Roisa Consultancy Ltd | Professional & scientific | 2022 |
| Roleplayrooms Ltd | Arts & recreation | 2024 |
| Rolla Holdco Limited | Manufacturing | 2023 |
| Rollin Patty Wagon Ltd | Hospitality | 2025 |
| Rolytica Ltd | Real estate | 2016 |
| Roma Food Ltd | Hospitality | 2026 |
| Roma Food Service Ltd | Hospitality | 2026 |
| Romero Ice Cream Ltd | Manufacturing | 2023 |
| Romford Estates Limited | Real estate | 2013 |
| Roof Condition Assessment Limited | Professional & scientific | 2026 |
| ROOF8 Ltd | Wholesale & retail | 2025 |
| Roofing Insulation Services Ltd | Construction | 2007 |
| ROOMS&KEYS17 Ltd | Real estate | 2026 |
| Roomstayer Holidays Limited | Hospitality | 2025 |
| Roots Kitchen Ltd | Manufacturing | 2020 |
| Rope Walk Property Management Limited | Households | 2023 |
| Ropshitz Ltd | Wholesale & retail | 2025 |
| Roris Solutions Ltd | Construction | 2021 |
| Rose Beauty Ltd | Other services | 2019 |
| Rose Blossom Care Limited | Health & social care | 2024 |
| Rose Medical Staff Ltd | Administrative & support | 2025 |
| Rose Securities (NO.2) Limited | Real estate | 2018 |
| Rose Securities Limited | Real estate | 2018 |
| Rosebriar Ltd | Extraterritorial | 2005 |
| Rosebush Limited | Real estate | 2025 |
| Rosehill Greental Investments Limited | Real estate | 2021 |
| Rosemar Estates Ltd | Real estate | 2024 |
| Rosemark Imports UK Ltd | Wholesale & retail | 2021 |
| Rosemond Stores Limited | Wholesale & retail | 2024 |
| Rosemount Real Estates Ltd | Professional & scientific | 2022 |
| Rosenthal Management Ltd | Administrative & support | 2025 |
| Roses RUM Ltd | Wholesale & retail | 2023 |
| Roseville Estate Management Limited | Real estate | 2021 |
| Rosewood Rentals and Renovations Ltd | Construction | 2024 |
| Rosherton Ltd | Extraterritorial | 2013 |
| Rossa Group Ltd | Transport & logistics | 2017 |
| Rossdrive Limited | Real estate | 2024 |
| Rosslare Consulting Ltd | Other services | 2022 |