| RK & Co. Ltd | Wholesale & retail | 2025 |
| RK Contractors Birmingham Ltd | Construction | 2019 |
| RK1 Trading Ltd | Hospitality | 2022 |
| RK4 Limited | Households | 2023 |
| RKA Fuel UK Limited | Wholesale & retail | 2016 |
| RKB Brothers 786 Ltd | Wholesale & retail | 2014 |
| Rkcr Ltd | Health & social care | 2024 |
| RKE Dwellings Ltd | Real estate | 2017 |
| Rkerrison Ltd | Wholesale & retail | 2026 |
| RKJ Property Investments Ltd | Real estate | 2017 |
| RKP Engineering Solutions Ltd | Construction | 2017 |
| RL & T Properties Ltd | Real estate | 2014 |
| RL Group Limited | Administrative & support | 2015 |
| RL Services (Norwich) Ltd | Other services | 2021 |
| RLB Family Investment Company | Administrative & support | 2014 |
| Rlepl Ltd | Administrative & support | 2013 |
| RLG Scaffolding Ltd | Construction | 2024 |
| RLH Medical Ltd | Health & social care | 2019 |
| Rlic Ltd | Hospitality | 2023 |
| Rlpsss Ltd | Financial services | 2024 |
| RLU Limited | Real estate | 2022 |
| RM & PM Property Ltd | Real estate | 2023 |
| RM Sales Consultancy Limited | Professional & scientific | 2018 |
| RM Services (Norfolk) Limited | Administrative & support | 2006 |
| RMB Construction Anglia Ltd | Construction | 2020 |
| RMB Financial Consultants Ltd | Financial services | 2019 |
| RMB Rentals Ltd | Manufacturing | 2025 |
| RME Building Services Ltd | Construction | 2020 |
| Rmec Electrical Ltd | Construction | 2021 |
| Rmediapaige Limited | Professional & scientific | 2023 |
| RMG Heating Limited | Construction | 2026 |
| RMI Recruitment Limited | Administrative & support | 2025 |
| RML Buildings Ltd | Administrative & support | 2017 |
| RML Norwich Ltd | Hospitality | 2014 |
| RML2401 Limited | Transport & logistics | 2022 |
| RMM Group Ltd | Real estate | 2025 |
| RMM Premier Limited | Wholesale & retail | 2012 |
| RMN Consultancy Ltd | Information & communication | 2018 |
| RMR Air Space Developments Limited | Construction | 2024 |
| RMR Construction Group Limited | Construction | 2019 |
| RMR Design & Build PLC | Construction | 2019 |
| RMR Facades Limited | Manufacturing | 2012 |
| RMR Rooftops Limited | Construction | 2017 |
| RMR Site Developments Limited | Construction | 2025 |
| RMS UXO Limited | Financial services | 2023 |
| RMW Design Ltd | Professional & scientific | 2018 |
| Rnashield Limited | Professional & scientific | 2023 |
| RNC Restaurants Limited | Wholesale & retail | 2004 |
| Rndtech Limited | Wholesale & retail | 2018 |
| RNJ Beauty Ltd | Other services | 2023 |
| RNP Property Ltd | Real estate | 2025 |
| RNS Media Ltd | Professional & scientific | 2023 |
| Road Angels Assist Ltd | Professional & scientific | 2016 |
| Road Safety Audit Services Ltd | Professional & scientific | 2016 |
| Roadrunner Express Couriers Limited | Transport & logistics | 2000 |
| Roadtechs Glasgow Limited | Construction | 2023 |
| Roar Heat Limited | Construction | 2012 |
| ROB Deeba Ltd | Wholesale & retail | 2017 |
| ROB Panter Associates Ltd | Construction | 2025 |
| ROB Tyson Ltd | Administrative & support | 2020 |
| ROB Whitworth Productions Ltd | Information & communication | 2017 |
| Robarni Ltd | Real estate | 2017 |
| Robert Beamish Limited | Information & communication | 2011 |
| Robert Gerrard & Westbrook Holdings Limited | Extraterritorial | 2014 |
| Robert Gerrard & Westbrook Limited | Financial services | 1998 |
| Robert Holden Ltd | Extraterritorial | 2018 |
| Robert Koebner Consulting Ltd | Professional & scientific | 2006 |
| Robert Lambert Racing Limited | Arts & recreation | 2019 |
| Robert MOY Estate & Letting Agents Limited | Real estate | 2016 |
| Robert Oliver Menswear Limited | Wholesale & retail | 2010 |
| Robert Porter Plumbing Services Ltd | Construction | 2022 |
| Robert Stone Associates Ltd | Construction | 2002 |
| Robert Symon Plumbing & Building Ltd | Construction | 2019 |
| Roberts Building Services EA Ltd | Construction | 2022 |
| Roberts Investments BR Limited | Real estate | 2020 |
| Roberts Mackie Winstanley Limited | Financial services | 2026 |
| Robin Bertram Architects Ltd | Professional & scientific | 2020 |
| Robin Brice Enterprises Ltd | Agriculture & fishing | 2012 |
| Robin GUY Homes Limited | Construction | 2011 |
| Robin Plumbing Limited | Construction | 2022 |
| Robinson Financial Ltd | Financial services | 2021 |
| Robinson's Road Ready Limited | Education | 2024 |
| Robinsons Asset Management Limited | Real estate | 2017 |
| Robinson’S Road Ready Recruits Ltd | Education | 2025 |
| Roblitz Ltd | Transport & logistics | 2014 |
| Robomoco Ltd | Information & communication | 2012 |
| Robot Holdings Ltd | Extraterritorial | 2021 |
| Robot Mascot Ltd | Professional & scientific | 2015 |
| Robotham Consultancy Services Ltd | Professional & scientific | 1990 |
| Robotham Waste Consultancy Limited | Professional & scientific | 2011 |
| Robson Accounting Ltd | Professional & scientific | 2018 |
| Robson Downing Ltd | Professional & scientific | 2001 |
| Robush Limited | Professional & scientific | 1988 |
| Robustum Ltd | Professional & scientific | 2016 |
| Rochester Energy Storage Limited | Construction | 2024 |
| Rochester PR Group Ltd | Professional & scientific | 2011 |
| Rochford Norse Limited | Water & waste | 2022 |
| Rock & Route Properties Ltd | Real estate | 2026 |
| Rock Against Child Pornography and Abuse UK Limited | Health & social care | 2009 |
| Rock and Realm Ltd | Wholesale & retail | 2022 |