| Rakah Ltd | Extraterritorial | 2021 |
| RAM Cooling Ltd | Professional & scientific | 2026 |
| RAM Refrigeration Airconditioning Management Ltd | Professional & scientific | 2025 |
| Rambut Holdings Ltd | Financial services | 2026 |
| Ramelia Ltd | Transport & logistics | 2023 |
| Ramesees Ltd | Hospitality | 2026 |
| Ranch Development Company Limited | Construction | 2002 |
| Randolph & Bloomfield Ltd | Professional & scientific | 2026 |
| Rani's Haveli Limited | Other services | 2021 |
| Ranjk Ltd | Transport & logistics | 2022 |
| Ranmove Group Limited | Professional & scientific | 2003 |
| Ranmove Homes (Investments) Limited | Real estate | 2004 |
| Ranmove Homes (South East) Limited | Real estate | 1999 |
| Ranmove Homes (Sussex) Limited | Construction | 2003 |
| Ranmove Homes Limited | Financial services | 1999 |
| Rare AS Onions Limited | Professional & scientific | 2024 |
| Rashid Wealth Management Limited | Households | 2025 |
| Ratemyrave Limited | Professional & scientific | 2018 |
| Ratherton Ltd | Information & communication | 2010 |
| Ratrace Customs Ltd | Wholesale & retail | 2025 |
| Ratrace Retro Ltd | Wholesale & retail | 2025 |
| Raventon Estates Ltd | Real estate | 2026 |
| RAW Business Solutions Ltd | Financial services | 2018 |
| RAY and DAN Enterprises Ltd | Health & social care | 2014 |
| Raya&Ko Ltd | Construction | 2018 |
| Rayaa Ltd | Manufacturing | 2023 |
| Rayari Hands Limited | Hospitality | 2025 |
| Rayfad Group Ltd | Health & social care | 2019 |
| Rayron Care Limited | Health & social care | 2020 |
| Rayron Services Limited | Health & social care | 2020 |
| Rayse People Limited | Administrative & support | 2025 |
| Rayse Talent Ltd | Administrative & support | 2016 |
| Razor Grinder Properties Limited | Real estate | 2013 |
| RB Surveys Limited | Construction | 2014 |
| RBL Wealth Management Ltd | Financial services | 2020 |
| RC Haulage Limited | Transport & logistics | 2019 |
| RCB Healthcare Group Limited | Extraterritorial | 2020 |
| RCB Home Care Group Limited | Health & social care | 2024 |
| RCB Leisure Group Limited | Financial services | 2022 |
| Rccg, Covenant Praise Centre | Other services | 2011 |
| Rchn Limited | Real estate | 2019 |
| RCJ Finance Limited | Professional & scientific | 2016 |
| RCS Plumber Ltd | Construction | 2025 |
| RE Corps Enterprises Limited | Wholesale & retail | 1995 |
| Re-Connected Coaching Ltd | Professional & scientific | 2018 |
| Re-Engine Ltd | Information & communication | 2019 |
| Re-Go Autoparts Limited | Manufacturing | 1992 |
| Reach Healthcare Ltd | Extraterritorial | 2009 |
| React Property Limited | Real estate | 2024 |
| Reaction Holdings Limited | Professional & scientific | 2019 |
| Real Moments Content Ltd | Professional & scientific | 2025 |
| Real Mozay Global Company Limited | Hospitality | 2024 |
| Real Physiosolutions Limited | Health & social care | 2020 |
| Realbound Ltd | Construction | 2025 |
| Really FAB Homes Ltd | Real estate | 2025 |
| Realm Electrical LLP | | 2016 |
| Realm Electrical Services Limited | Construction | 2018 |
| Ream Interiors Ltd | Professional & scientific | 2006 |
| Ream Kitchens Limited | Manufacturing | 1993 |
| Reama Solution Limited | Transport & logistics | 2020 |
| Reapsource Ltd | Information & communication | 2016 |
| Reapstream Ltd | Information & communication | 2016 |
| Rebuild Holdings Ltd | Financial services | 2023 |
| Recepta Solutions Limited | Information & communication | 2012 |
| Recruitingexperts Limited | Administrative & support | 2025 |
| Recycle a Sari Limited | Wholesale & retail | 2025 |
| Red Apple Designs (KS) Limited | Professional & scientific | 2012 |
| Red House Property Investments Limited | Real estate | 2002 |
| Red Phoenix Services Ltd | Professional & scientific | 2025 |
| Red Sun ME4 2020 Ltd | Hospitality | 2020 |
| Redchurch Properties Limited | Construction | 2010 |
| Rede Group Ltd | Construction | 2020 |
| Redemptive Property Solutions Ltd | Real estate | 2024 |
| Redfan Developments Limited | Real estate | 2014 |
| Redgrave Scaffolding Limited | Manufacturing | 2002 |
| Redhouse Care Limited | Administrative & support | 2012 |
| Redshank Consultants Ltd | Wholesale & retail | 2021 |
| Reece Sean Consulting Ltd | Information & communication | 2023 |
| Reecycle Medway Kent Ltd | Water & waste | 2026 |
| Reel Fruits Limited | Arts & recreation | 2012 |
| Reel Rebellion Film Co. Ltd | Information & communication | 2020 |
| Refine Media Group Ltd | Professional & scientific | 2022 |
| Regain Hearing Ltd | Health & social care | 2010 |
| Regal Controls Limited | Construction | 2017 |
| Regal Estates Sandwich Limited | Real estate | 2024 |
| Regalia Global Limited | Administrative & support | 2020 |
| Regallecare Ltd | Health & social care | 2023 |
| Regent Business Centre (Chatham) Limited | Administrative & support | 2005 |
| Regent Guest House Ltd | Hospitality | 2008 |
| Regional Mechanical Services Ltd | Construction | 2011 |
| Regular Host Ltd | Wholesale & retail | 2025 |
| Rehoboat Ltd | Real estate | 2023 |
| Rehoboth Consult Limited | Professional & scientific | 2013 |
| Rehoboth UK Ventures Limited | Hospitality | 2025 |
| Rehoboth Wells Properties Ltd | Real estate | 2022 |
| Reid Compliance Ltd | Administrative & support | 2024 |
| Reign Health Limited | Health & social care | 2021 |
| Relateplus | Other services | 2009 |
| Reliablehealth Ltd | Health & social care | 2023 |
| Reliance Property Loans Limited | Financial services | 2002 |