| Rage Solutions Limited | Administrative & support | 2015 |
| Raigo Engineering Services Limited | Administrative & support | 2022 |
| Raihan Associates Ltd | Professional & scientific | 2021 |
| Rail and Signalling Consultancy Ltd | Professional & scientific | 2019 |
| Rail Engineering Project Services Limited | Administrative & support | 2012 |
| Rail Integration Services Limited | Professional & scientific | 2017 |
| Rail Pro 2000 Limited | Administrative & support | 2015 |
| Rail Readiness Advisory Services Ltd | Professional & scientific | 2026 |
| Rail Tech Support Ltd | Construction | 2014 |
| Railcem Ltd | Professional & scientific | 2019 |
| Railside Estates Ltd | Real estate | 2024 |
| Railstruct Engineering Limited | Professional & scientific | 2018 |
| Railway View Properties Limited | Real estate | 2016 |
| Rainbow After the Storm C.I.C. | Education | 2020 |
| Rainford Associates Ltd | Professional & scientific | 2016 |
| Rainhill Village Carpets Limited | Wholesale & retail | 2003 |
| Rainly Ltd | Information & communication | 2022 |
| Rainmaker Solutions Holdings Limited | Financial services | 2018 |
| Rainmaker Solutions Limited | Professional & scientific | 2010 |
| Raise Associates Limited | Professional & scientific | 2010 |
| Raisin Dads Ltd. | Hospitality | 2023 |
| RAJ Aleef Ltd | Hospitality | 2025 |
| RAJ Health Limited | Health & social care | 2014 |
| Rajsol Limited | Professional & scientific | 2016 |
| RAK Global Holdings Limited | Financial services | 2019 |
| RAK Global Limited | Financial services | 2007 |
| Rakemaster Limited | Manufacturing | 1991 |
| Raleigh RYE Limited | Information & communication | 2024 |
| Ralibr Limited | Health & social care | 2024 |
| Rally Properties Ltd | Real estate | 2026 |
| Ralphalancritchley Limited | Professional & scientific | 2014 |
| RAM Construction Ltd | Construction | 2021 |
| RAM Properties (Holdings) Limited | Financial services | 2015 |
| RAM Properties (Investments) Limited | Real estate | 2015 |
| RAM Properties Limited | Financial services | 1998 |
| RAM R&A Ltd | Financial services | 2024 |
| RAM Utility Solutions Ltd | Water & waste | 2019 |
| Ramesh Myla Ltd | Professional & scientific | 2019 |
| Rami Ltd | Information & communication | 2018 |
| Ramis Engineering Limited | Administrative & support | 2014 |
| Ramptec Limited | Construction | 1999 |
| Ramsal Limited | Wholesale & retail | 2020 |
| Ramswood Nurseries Limited | Agriculture & fishing | 2016 |
| RAN1 Limited | Other services | 2022 |
| RAN2 Limited | Other services | 2022 |
| Rance Rail Ltd | Administrative & support | 2014 |
| Randall Site Services Ltd. | Administrative & support | 2011 |
| Randletech Limited | Information & communication | 2019 |
| Random E-Ventures Limited | Wholesale & retail | 2023 |
| Randt Inspection Ltd | Professional & scientific | 2018 |
| Range Business Limited | Information & communication | 2023 |
| Rangemaster Consultancy Ltd | Professional & scientific | 2011 |
| Ranjhco Management Consultancy Ltd | Real estate | 2023 |
| Rankcommrail Limited | Other services | 2017 |
| Ranu Childcare Limited | Health & social care | 2009 |
| Ranu Estates Limited | Real estate | 2012 |
| Ranu Ltd | Health & social care | 2006 |
| Ranu Poppies Childcare Limited | Education | 2014 |
| Ranu Primroses Limited | Education | 2015 |
| Ranya Ltd | Hospitality | 2024 |
| Raparin Food Limited | Hospitality | 2019 |
| Rapdale Electrical Limited | Construction | 1998 |
| Rapid Accident Management Legal Services Limited | Other services | 2001 |
| Rapid and Sustained Limited | Professional & scientific | 2023 |
| Rapid Render Ltd | Construction | 2025 |
| Rapid Sequence Solutions Limited | Health & social care | 2022 |
| Rapid Transport & Logistics Ltd | Transport & logistics | 2022 |
| Rapid-Fire Logistics & Solutions Ltd | Professional & scientific | 2026 |
| Rapidrun Courier Ltd | Transport & logistics | 2025 |
| Rapkin Business Solutions Ltd | Professional & scientific | 2020 |
| Raposo Engineering Ltd | Construction | 2023 |
| Rapport Public Relations Limited | Professional & scientific | 2022 |
| Rapt VFX Limited | Information & communication | 2021 |
| Rare Event AI Limited | Information & communication | 2018 |
| Rares S. Limited | Manufacturing | 2019 |
| Rasenad Consulting Ltd | Information & communication | 2019 |
| Rashe Solutions Ltd | Professional & scientific | 2021 |
| Rasme Trans Ltd | Transport & logistics | 2019 |
| Raspberry Beret Homes Ltd | Real estate | 2018 |
| Ratcliffe Business Consultancy Ltd | Professional & scientific | 2024 |
| Rational Rail Ltd | Professional & scientific | 2013 |
| Rautini Limited | Real estate | 2023 |
| Ravago Building Solutions UK Limited | Manufacturing | 2018 |
| Raven Professional Services Limited | Administrative & support | 2023 |
| Ravensmount (Alnwick) Limited | Other services | 2022 |
| Ravi Gudena Ltd | Health & social care | 2013 |
| Ravi Gudena Medical Ltd | Health & social care | 2013 |
| Ravianu Limited | Other services | 2014 |
| RAW Roots Ltd | Administrative & support | 2018 |
| RAW Strength Gym Ltd | Arts & recreation | 2015 |
| Rawcaw Limited | Professional & scientific | 2023 |
| Rawwater Applied Technology Limited | Manufacturing | 2020 |
| Rawwater Limited | Extraterritorial | 2016 |
| Rawwater Wells Limited | Professional & scientific | 2020 |
| RAX Trading Ltd | Hospitality | 2017 |
| RAY Mckenna Ltd | Administrative & support | 2023 |
| Raye Creative Ltd | Information & communication | 2023 |
| Rayflex Rubber Limited | Wholesale & retail | 1975 |
| Rayment Limited | Administrative & support | 2013 |
| Rayn Associates Ltd | Construction | 2023 |