| RM Kingsley Ltd | Real estate | 2007 |
| RM Pubs UK Ltd | Hospitality | 2018 |
| RM Retail Trading Ltd | Wholesale & retail | 2026 |
| RM Singh Properties Ltd | Real estate | 2023 |
| RM Social Work Consultancy Ltd | Health & social care | 2019 |
| RM Upholstery Limited | Manufacturing | 2023 |
| RM82 Ltd | Real estate | 2020 |
| Rmac Properties Ltd | Real estate | 2023 |
| Rmat Properties Limited | Real estate | 2019 |
| RMC Paint Solutions Limited | Information & communication | 2011 |
| RMG Engineering Limited | Manufacturing | 2026 |
| RMH Locum Limited | Health & social care | 2017 |
| RMJ Property Maintenance Ltd | Construction | 2020 |
| RMK Care Limited | Health & social care | 2014 |
| RMP Analytics Limited | Professional & scientific | 2017 |
| RMP Dent Ltd | Health & social care | 2025 |
| RMR Building Ltd | Construction | 2021 |
| RMR Roofing Ltd | Construction | 2025 |
| RMS Foods Limited | Hospitality | 2024 |
| RMS Support Services Ltd | Administrative & support | 2022 |
| RMT Locums Ltd | Health & social care | 2019 |
| RMV Fashions Limited | Manufacturing | 2014 |
| Rmzuk Ltd | Health & social care | 2025 |
| RN Advisory Limited | Professional & scientific | 2016 |
| RN Freight Ltd | Transport & logistics | 2020 |
| RN Property Developments Limited | Real estate | 1999 |
| RN Retail Limited | Wholesale & retail | 2023 |
| RN Safetyinstall Limited | Construction | 2018 |
| RNC Psychiatry Ltd | Health & social care | 2022 |
| RND Interiors Limited | Manufacturing | 2010 |
| RNM Midlands Limited | Manufacturing | 2026 |
| Rnns Holdings Limited | Financial services | 2020 |
| Rnns Investments Limited | Real estate | 2020 |
| Rnns Properties Limited | Real estate | 2020 |
| RNP Trading Ltd | Hospitality | 2012 |
| Rnpsb Limited | Real estate | 2022 |
| RNR Commercial Finance Solutions Ltd | Financial services | 2024 |
| RNR Lettings Limited | Real estate | 2020 |
| RNR Mortgage Solutions Ltd | Financial services | 2018 |
| RNR Retail Limited | Wholesale & retail | 2024 |
| RNS Enterprise Ltd | Real estate | 2022 |
| RNS Training Ltd | Education | 2020 |
| RNV Ltd | Wholesale & retail | 2025 |
| Rnv(Uk) Ltd | Real estate | 2023 |
| Rnys Properties Ltd | Construction | 2019 |
| RO Property Limited | Real estate | 2019 |
| RO Speed Logistic Ltd | Transport & logistics | 2020 |
| Ro&Bi Trans Ltd | Transport & logistics | 2019 |
| Road & Sewer Consulting Ltd | Professional & scientific | 2021 |
| Road Alert Ltd | Education | 2021 |
| Road Rentals Limited | Extraterritorial | 2004 |
| Road Rizz Driving Academy Ltd | Education | 2025 |
| Road Runner DD Ltd | Transport & logistics | 2023 |
| Road Safety Consulting Limited | Administrative & support | 2004 |
| ROAD2TRAIN Limited | Other services | 2019 |
| Roadefer Ltd | Wholesale & retail | 2019 |
| Roadflex Limited | Transport & logistics | 2022 |
| Roadride Ltd | Wholesale & retail | 2026 |
| Roadsafe Corporate Group Limited | Construction | 2012 |
| Roadstream.Io Limited | Information & communication | 2018 |
| Roadways Transport Limited | Transport & logistics | 2017 |
| Roaming Giraffe Ltd | Hospitality | 2012 |
| Roan Wolf Ltd | Administrative & support | 2022 |
| Roarsome Bakes Limited | Manufacturing | 2020 |
| Roas Consulting Ltd | Professional & scientific | 2019 |
| ROB Alston Retail Limited | Real estate | 2014 |
| ROB Gray Racing and Driving Limited | Arts & recreation | 2024 |
| ROB Grundy Plumbing & Heating Limited | Construction | 2006 |
| ROB Into Asia Ltd | Wholesale & retail | 2022 |
| ROB Lancaster Driving Solutions Limited | Transport & logistics | 2016 |
| ROB Lawes Entertainments Ltd | Arts & recreation | 2023 |
| ROB Leather Physiotherapy Limited | Health & social care | 2010 |
| ROB Wood Limited | Wholesale & retail | 2011 |
| Robalo Enterprise Ltd | Transport & logistics | 2024 |
| Robarin Investment Limited | Real estate | 2021 |
| Robbins Locuming Ltd | Health & social care | 2023 |
| Robenny Company Limited | Health & social care | 2019 |
| Robert and R Limited | Administrative & support | 2022 |
| Robert Bewick House Ltd | Construction | 2025 |
| Robert James Advertising Limited | Financial services | 2001 |
| Robert JET5 Cleaning Services Ltd | Administrative & support | 2019 |
| Robert Loomes Limited | Administrative & support | 2010 |
| Robert Maddock Limited | Wholesale & retail | 2012 |
| Robert Parker Projects Limited | Professional & scientific | 2013 |
| Robert Pochin Holdings Limited | Wholesale & retail | 2017 |
| Robert Pochin Limited | Wholesale & retail | 1922 |
| Robert Rock Golf Professional Limited | Arts & recreation | 2003 |
| Robert Taboada Transport Ltd | Transport & logistics | 2023 |
| Robert Wheway Ltd. | Other services | 2012 |
| Robert Woods Properties Limited | Construction | 2017 |
| Robert&Eric Limited | Transport & logistics | 2018 |
| Roberts & Lyons Limited | Construction | 2003 |
| Roberts Plant Services Limited | Manufacturing | 2015 |
| Roberts Production Associates Limited | Professional & scientific | 1993 |
| Roberts Tours Limited | Transport & logistics | 1995 |
| Roberts Wealth Management Ltd | Professional & scientific | 2020 |
| Robiito Limited | Public administration | 2018 |
| Robin Wood Limited | Arts & recreation | 2014 |
| Robinson Associates Design Consultants Limited | Arts & recreation | 1992 |
| Robinson Engineering Research Enterprises Limited | Information & communication | 2020 |