| RA Healthcare (Services) Ltd | Health & social care | 2013 |
| RA Inventory Ltd | Wholesale & retail | 2024 |
| RA Predecessor Limited | Professional & scientific | 1928 |
| RA Properties (Leeds) Limited | Real estate | 2022 |
| RA Real Estate Limited | Real estate | 2011 |
| RA Recruitment Group Limited | Administrative & support | 2016 |
| RA Restaurant Jinnah Leeds Ltd | Hospitality | 2024 |
| RA UK Holdings Ltd | Real estate | 2024 |
| RA3 Limited | Real estate | 2019 |
| RA4 Limited | Real estate | 2019 |
| Raanah Limited | Transport & logistics | 2019 |
| Rabaakh Azad Limited | Administrative & support | 2018 |
| Rabb-It (IT) Limited | Information & communication | 2011 |
| Rabbit Hole Designs Ltd | Arts & recreation | 2008 |
| Rabbit Hole Leisure Ltd | Wholesale & retail | 2016 |
| RAC Plastering Ltd | Construction | 2025 |
| Race Around Britain Limited | Arts & recreation | 2023 |
| Race Cleaning Ltd | Administrative & support | 2024 |
| Race Plastics Limited | Manufacturing | 2023 |
| Raceti Limited | Wholesale & retail | 2015 |
| Rachael Machin Coaching Ltd | Professional & scientific | 2020 |
| Rachaeltree Ltd | Real estate | 2024 |
| Rachel Donnelly Photography Ltd | Professional & scientific | 2023 |
| Rachel Emmott Accounting and Financial Consulting Limited | Professional & scientific | 2013 |
| Rachel Harrison Limited | Professional & scientific | 2009 |
| Rachel Medical Ltd | Administrative & support | 2016 |
| Rachel O'Brien Limited | Information & communication | 2026 |
| Rachel Thoburn Aesthetics Limited | Other services | 2022 |
| Rachel Wood Only Fans Limited | Construction | 2019 |
| Rachell Ltd | Extraterritorial | 2022 |
| Rachow LLP | | 2014 |
| Rackstraws Bars (Leeds) Limited | Hospitality | 2018 |
| RAD Ecommerce Ltd | Wholesale & retail | 2025 |
| RAD Holdings Group Ltd | Financial services | 2026 |
| RAD Logistics Ltd | Transport & logistics | 2023 |
| RAD Phase 1 Type a Property Company NO 15 Limited | Construction | 2016 |
| RAD Phase 1 Type a Property Company NO 16 Limited | Construction | 2016 |
| RAD Phase 1 Type a Property Company NO 2 Limited | Construction | 2016 |
| RAD Phase 1 Type a Property Company NO 6 Limited | Construction | 2016 |
| RAD Phase 1 Type a Property Company NO 8 Limited | Construction | 2016 |
| Radapex Ltd | Information & communication | 2012 |
| Radar Catering Limited | Hospitality | 2024 |
| Radar Healthcare Limited | Information & communication | 2024 |
| Radarucourier Ltd | Transport & logistics | 2025 |
| RADCARE7 Ltd | Transport & logistics | 2022 |
| Radd Developments Limited | Construction | 2020 |
| Radd Properties Limited | Real estate | 2019 |
| Radelm Ltd | Health & social care | 2023 |
| Radev.Io Ltd | Information & communication | 2022 |
| Radiance Aesthetics and Skincare Limited | Other services | 2024 |
| Radiance Hairdressing Ltd | Other services | 2022 |
| Radiance Property Management Ltd | Real estate | 2024 |
| Radiation Protection Advice & Services Limited | Professional & scientific | 2016 |
| Radical Services Limited | Health & social care | 1995 |
| Radicle Biotech Limited | Other services | 2018 |
| Radihogg Ltd | Health & social care | 2025 |
| Radii Living Limited | Construction | 2021 |
| Radii Ltd | Real estate | 2024 |
| Radio Asian Fever CIC | Information & communication | 2004 |
| Radio News Co Ltd | Financial services | 2025 |
| Radio News Hub Limited | Information & communication | 2014 |
| Radio Rangoli CIC | Information & communication | 2020 |
| Radio Shop Ltd | Information & communication | 2020 |
| Radiology Reporting (UK) Ltd. | Health & social care | 2014 |
| Radium Holdings Limited | Professional & scientific | 2018 |
| Radland Construction Ltd | Construction | 1979 |
| Radneuroneck Ltd | Health & social care | 2023 |
| Rado Ltd | Transport & logistics | 2015 |
| Radoslaw Stec Ltd | Transport & logistics | 2018 |
| Radtac Holdings Limited | Financial services | 2020 |
| Radu Healthcare Ltd | Health & social care | 2021 |
| Radu P Trans Limited | Transport & logistics | 2025 |
| Raduc Transport Ltd | Transport & logistics | 2026 |
| Radunity Ltd | Information & communication | 2025 |
| Radvista Limited | Health & social care | 2026 |
| Radwell Property Limited | Real estate | 2021 |
| RAE and EVE Limited | Information & communication | 2018 |
| RAE MAE Limited | Arts & recreation | 2015 |
| Raevallyne Horticultural Limited | Administrative & support | 2015 |
| RAF Building Solutions Ltd | Construction | 2021 |
| RAF C Transport Ltd | Transport & logistics | 2018 |
| RAF Furniture Leeds Ltd | Wholesale & retail | 2024 |
| RAF Gym Tech Ltd | Manufacturing | 2026 |
| RAF Heating Services Limited | Construction | 2026 |
| RAF Properties Leeds Ltd | Real estate | 2025 |
| Rafa Cleaning Ltd | Administrative & support | 2024 |
| Rafa Health Ltd | Health & social care | 2025 |
| Rafaa Ltd | Health & social care | 2012 |
| Rafal Mikus Limited | Transport & logistics | 2019 |
| Rafal Wasik Ltd | Administrative & support | 2016 |
| Rafamate-Estera Cleaner Ltd | Water & waste | 2024 |
| Rafeian Medical Ltd | Health & social care | 2023 |
| Raffaello Tomasso Limited | Professional & scientific | 2012 |
| Raffia Tech AI Ltd | Information & communication | 2024 |
| Raffles Enterprise Limited | Hospitality | 2014 |
| Rafiq Properties Management Ltd | Real estate | 2023 |
| Rafl UK Comps Limited | Arts & recreation | 2023 |
| Rafmate Limited | Water & waste | 2025 |
| Rafraf United Ltd | Wholesale & retail | 2025 |
| Rafter Property Group Limited | Real estate | 2025 |