| R2B Ltd | Real estate | 2020 |
| R2FXG Ltd. | Administrative & support | 2023 |
| R2G Limited | Professional & scientific | 2024 |
| R2GTYRES Ltd | Wholesale & retail | 2024 |
| R2I Semiconductor Applications Limited | Professional & scientific | 2012 |
| R4 Lighting Ltd | Construction | 2022 |
| R45IKA Ltd | Real estate | 2026 |
| R4R - Little Bo-Tique Limited | Wholesale & retail | 2017 |
| R828 Solutions Limited | Information & communication | 2017 |
| RA Commercial Services Ltd | Professional & scientific | 2021 |
| RA Contracting Ltd | Information & communication | 2024 |
| RA Creative Limited | Professional & scientific | 1985 |
| RA Elmes Limited | Financial services | 2012 |
| RA Hull Limited | Hospitality | 2015 |
| RA Tech UK Ltd | Wholesale & retail | 2014 |
| RA Works Limited | Manufacturing | 2023 |
| Ra'Ah Hugs Ltd | Wholesale & retail | 2025 |
| Ra'Nubis Mineral Moss Ltd | Wholesale & retail | 2020 |
| Ra-Damage Repair- Ltd | Other services | 2020 |
| Raah (Newark) Limited | Other services | 2009 |
| Raaz Business Consultants Ltd | Other services | 2023 |
| RAB Coms Ltd | Information & communication | 2012 |
| Rabbitt Properties Ltd | Real estate | 2025 |
| Rabeeah and Hishaam Ltd | Real estate | 2024 |
| Rabona Consulting Ltd | Information & communication | 2023 |
| RAC Technical Consulting Limited | Professional & scientific | 2009 |
| Raccoon on the Run Video Production and Editing Ltd. | Information & communication | 2022 |
| Race Crowd Limited | Arts & recreation | 2020 |
| Race Drivers Inc. Ltd | Transport & logistics | 2011 |
| RACE2THECASTLE Ltd | Arts & recreation | 2024 |
| Race: Risk & Compliance Events Ltd | Information & communication | 2025 |
| Racecourse Technical Attendance Service Ltd | Manufacturing | 2009 |
| Racecourse Way Business Centre LLP | | 2006 |
| Rachel Ellen Designs Limited | Manufacturing | 1999 |
| Rachel Fletcher Coaching Ltd | Professional & scientific | 2015 |
| Rachel Grace Psychology Ltd | Education | 2020 |
| Rachel Topco Limited | Health & social care | 2012 |
| Rackety's Care Group Ltd | Wholesale & retail | 2015 |
| Raco International Trading Ltd | Administrative & support | 2016 |
| Racycle Ltd | Water & waste | 2011 |
| RAD 1982 Ltd | Financial services | 2016 |
| RAD Digital Ltd | Professional & scientific | 2013 |
| RAD Trader Ltd | Wholesale & retail | 2025 |
| RAD UK Nottingham Ltd | Manufacturing | 2011 |
| Radber Limited | Health & social care | 2024 |
| Radcliffe Care Services Limited | Health & social care | 2010 |
| Radcliffe Chiropractic Clinic Limited | Health & social care | 2005 |
| Radcliffe Court (Nottingham) Management Company Limited | Households | 2017 |
| Radcliffe Nail & Spa Ltd | Other services | 2019 |
| Radcliffe Olympic Football Club Limited | Arts & recreation | 2008 |
| Radcliffe on Trent Golf Club,Limited(The) | Arts & recreation | 1909 |
| Radcliffe Security & Network Solutions Ltd | Administrative & support | 2025 |
| Radcomm UK Ltd | Administrative & support | 2003 |
| Radez Ltd | Wholesale & retail | 2025 |
| Radfest Limited | Arts & recreation | 2023 |
| Radford Colwick Management Company Limited | Real estate | 2011 |
| Radford Holdings Limited | Construction | 1934 |
| Radford MOT Centre Limited | Wholesale & retail | 2016 |
| Radford Store Limited | Wholesale & retail | 2025 |
| Radhub Limited | Financial services | 2025 |
| Radiance Corporate Limited | Health & social care | 2024 |
| Radiance Infrared Group Ltd | Construction | 2025 |
| Radiant Beauty Store Ltd | Wholesale & retail | 2024 |
| Radiant Beauty Studios Limited | Other services | 2024 |
| Radiant Catalyst Nursery Limited | Education | 2025 |
| Radiant Cleaners Limited | Administrative & support | 2017 |
| Radiant Minds Ltd | Education | 2024 |
| Radiant Refresh Ltd | Administrative & support | 2026 |
| Radiant Self Shop Ltd | Wholesale & retail | 2024 |
| Radin Ltd | Wholesale & retail | 2024 |
| Radio Express Limited | Administrative & support | 2002 |
| Radio Faza CIC | Information & communication | 2025 |
| Radio Heat Ltd | Water & waste | 2018 |
| Radiology Cafe Ltd | Education | 2023 |
| Radisson Services Limited | Construction | 2022 |
| Radius Shopfitters Limited | Construction | 2012 |
| Radlett Auto Centre Limited | Transport & logistics | 2005 |
| Radley Associates UK Limited | Administrative & support | 2008 |
| Radley Construction Ltd | Construction | 2001 |
| Radma Investment Ltd | Real estate | 2025 |
| Radmarsh Road Holdings Limited | Financial services | 2020 |
| Radmarsh Road Management Limited | Real estate | 2022 |
| Rads Health Ltd | Health & social care | 2023 |
| Rads Rentals Ltd | Real estate | 2022 |
| Radu Cifu Limited | Administrative & support | 2023 |
| Raduna Corporation Ltd | Transport & logistics | 2018 |
| Radwo Ltd. | Transport & logistics | 2012 |
| Rafal Maciej Ulanski Ltd. | Extraterritorial | 2025 |
| Rafay Medical & Co Ltd | Health & social care | 2016 |
| Rafex Limited | Hospitality | 2018 |
| Rafferty Plastering Ltd | Construction | 2024 |
| Rafik Fanous Ltd | Health & social care | 2022 |
| Rafner Ltd | Transport & logistics | 2021 |
| Ragam Limited | Health & social care | 2022 |
| Ragent Health Ltd. | Professional & scientific | 2014 |
| Raggies CIC | Health & social care | 2025 |
| Ragnor Building Services Limited | Construction | 2019 |
| RAH Property Services Limited | Construction | 2010 |
| Raheem Properties Ltd | Real estate | 2024 |
| Rahmeez Younas Ltd | Professional & scientific | 2018 |