| R.W.H. Ltd | Health & social care | 2000 |
| R27DEVELOP Estates Limited | Real estate | 2024 |
| R2J Eveswell Ltd | Wholesale & retail | 2024 |
| R3TRO Media CYF | Information & communication | 2014 |
| R4R Ltd | Professional & scientific | 2018 |
| RA Executive Airport Transfers Ltd | Wholesale & retail | 2016 |
| RA Law Ltd | Professional & scientific | 2025 |
| RA Retailers Limited | Wholesale & retail | 2023 |
| RAA Group Ltd | Construction | 2025 |
| Raabtah Ltd | Wholesale & retail | 2026 |
| Raad AL Shamal AL Wataniya Trading Limited | Wholesale & retail | 2025 |
| Raadb Limited | Other services | 2023 |
| Raago Consulting Ltd | Professional & scientific | 2018 |
| Raah Petroleum Liaison Ltd | Mining & quarrying | 2019 |
| Raas Holdings Limited | Real estate | 2025 |
| Raastah Ltd | Wholesale & retail | 2026 |
| Raaya Industrial Co., Ltd. | Extraterritorial | 2019 |
| Rabbit Tata Ltd | Administrative & support | 2020 |
| Rabble Coworking Studio Ltd | Administrative & support | 2024 |
| Rabid Media Limited | Information & communication | 2025 |
| Rabnawaz Trading Ltd | Wholesale & retail | 2025 |
| RAC Couriers Limited | Transport & logistics | 2023 |
| RAC Management Consultancy Ltd | Professional & scientific | 2015 |
| RAC Project Management Limited | Construction | 2018 |
| Race 2 the Source Ltd | Administrative & support | 2018 |
| Race Equality First Limited | Information & communication | 2011 |
| Race NOT Rest Limited | Information & communication | 2020 |
| Racecards Ltd | Information & communication | 2026 |
| Racecourse News Limited | Wholesale & retail | 2020 |
| Racer's Edge Automotive Services Ltd | Wholesale & retail | 2025 |
| Raceslot Ltd | Wholesale & retail | 2026 |
| Raceworld International Limited | Hospitality | 2018 |
| Rachel E Stringer Limited | Information & communication | 2015 |
| Rachel Industrial Limited | Extraterritorial | 2018 |
| Rachel Jackson Limited | Professional & scientific | 2007 |
| Racing AI Software Limited | Information & communication | 2019 |
| Racing Red Limited | Wholesale & retail | 2019 |
| Rack'N'Roll Garage Ltd | Wholesale & retail | 2018 |
| Racquets Ltd | Wholesale & retail | 2025 |
| Racstadt Limited | Professional & scientific | 2014 |
| Rada Translink Ltd | Transport & logistics | 2023 |
| Radaczewska Limited | Professional & scientific | 2018 |
| Radar MAG Limited | Manufacturing | 2021 |
| Radasense Ltd | Manufacturing | 2023 |
| Radford Computing Ltd. | Information & communication | 1998 |
| Radhee Limited | Information & communication | 2025 |
| RADI8 Heating and Plumbing Limited | Construction | 2017 |
| Radiance Lounge Ltd | Education | 2026 |
| Radiance Star Ltd | Information & communication | 2023 |
| Radiant Interiors Ltd | Construction | 2013 |
| Radical Stack Ltd | Information & communication | 2016 |
| Radik Limited | Wholesale & retail | 2019 |
| Radikal Property Solutions Limited | Real estate | 2014 |
| Radio Cabs (Wales) Ltd | Extraterritorial | 2014 |
| Radio Silence Entertainment Limited | Arts & recreation | 2017 |
| Radiophys Consulting Ltd | Professional & scientific | 2024 |
| Radisaga Trading Ltd | Wholesale & retail | 2025 |
| Radish Food Services Group Limited | Hospitality | 2004 |
| Radius Contracting Limited | Construction | 2012 |
| Radius Creative Ltd | Wholesale & retail | 2020 |
| Radius Professional Limited | Information & communication | 1999 |
| Radius Site Services Ltd | Construction | 2024 |
| Radka Advertising Limited | Professional & scientific | 2019 |
| Radnor Court Limited | Real estate | 1984 |
| Radnor Property Company Limited | Real estate | 2023 |
| Radorris Limited | Professional & scientific | 2026 |
| Rads and Taps Ltd | Construction | 2018 |
| Radyr Car Company Ltd | Wholesale & retail | 2014 |
| Radyr Eyecare Limited | Health & social care | 2006 |
| Radyr Garage Limited | Wholesale & retail | 2012 |
| Radyr Golf Club House Company Limited(The) | Real estate | 1910 |
| Radyr Management Company Limited | Households | 1997 |
| RAE Sky Ltd | Professional & scientific | 2018 |
| Raecorp Ltd | Education | 2021 |
| Raed Almzeni Ltd | Wholesale & retail | 2025 |
| Raees Wines Limited | Wholesale & retail | 2019 |
| Raelynne Lashes Ltd | Wholesale & retail | 2019 |
| Raes Mechanical Ltd | Construction | 2025 |
| RAF Techlogs Ltd | Information & communication | 2024 |
| Rafaah Financial Ltd | Information & communication | 2018 |
| Rafaf AL Ahlam Investment Company Ltd | Wholesale & retail | 2025 |
| Rafal Groborz Transport Ltd | Transport & logistics | 2018 |
| Rafal Properties Limited | Real estate | 2018 |
| Rafe Real Estate Ltd | Real estate | 2024 |
| Raffa Ltd | Wholesale & retail | 2025 |
| Raffaella Homecare Ltd | Health & social care | 2025 |
| Raffu Ltd | Financial services | 2019 |
| Rafia G Limited | Wholesale & retail | 2023 |
| Rafixx Limited | Wholesale & retail | 2019 |
| Rafl Marketing Ltd | Other services | 2025 |
| Raftis Consultants Limited | Real estate | 1999 |
| Rafz Management Ltd | Other services | 2019 |
| Raga Fragrance Ltd | Wholesale & retail | 2024 |
| Ragcycle Ltd | Wholesale & retail | 2018 |
| Rage Agency Ltd | Wholesale & retail | 2025 |
| Raggett Photography Ltd | Professional & scientific | 2019 |
| Raging Bull 22 Limited | Wholesale & retail | 2025 |
| Raging Swan Studios Ltd | Arts & recreation | 2011 |
| Raglan House Holdings Limited | Financial services | 2018 |
| Raglan House Prop Co LLP | | 2024 |