| QUALITY24 Care Limited | Health & social care | 2015 |
| Quick DO Flooring Ltd | Construction | 2024 |
| Quick Finishes Castings Limited | Manufacturing | 2009 |
| Quick Finishes Limited | Manufacturing | 1977 |
| Quick Key Properties Ltd | Real estate | 2025 |
| Quids Inn Ltd | Wholesale & retail | 2023 |
| Quinton Concrete Services Ltd | Construction | 2019 |
| R & a Portfolio Ltd | Real estate | 2024 |
| R and SS Properties Ltd | Real estate | 2025 |
| R Durkin Engineering Limited | Professional & scientific | 2014 |
| R Mehta Investments Ltd | Real estate | 2022 |
| R&A Chatha Transport Limited | Transport & logistics | 2022 |
| R&B Caribbean Flava Takeaway Ltd | Hospitality | 2025 |
| R&E Luczkowski - Transport Ltd | Transport & logistics | 2020 |
| R&N Enterprices Limited | Wholesale & retail | 2024 |
| RA & GT Holding Ltd | Financial services | 2018 |
| RA & GT Properties Ltd | Real estate | 2018 |
| Rabbi Enterprises Ltd | Health & social care | 2025 |
| Radio India Limited | Other services | 2017 |
| Rafiki Homes Ltd | Real estate | 2021 |
| Rahl Investments Ltd | Financial services | 2017 |
| RAI UNO Ltd | Transport & logistics | 2025 |
| Rainbow Bidco Limited | Financial services | 2018 |
| Rainbow Chinese Midlands Limited | Hospitality | 2022 |
| Rainbow Holdco Limited | Financial services | 2018 |
| Rainbow Kidz CIC | Health & social care | 2021 |
| Rajas Properties Limited | Real estate | 2019 |
| Rajman Rendering Ltd | Construction | 2023 |
| Ralhr Limited | Professional & scientific | 2012 |
| Ramsay Rubber & Plastics Holdings Limited | Professional & scientific | 2022 |
| Ramsay Rubber & Plastics Limited | Manufacturing | 1983 |
| Ramsun Transport Ltd | Administrative & support | 2017 |
| Rana Vehicles Ltd | Administrative & support | 2024 |
| Ranjit Transport Ltd | Transport & logistics | 2022 |
| Rapha Care Ltd | Health & social care | 2015 |
| Rapid Express Transport Limited | Transport & logistics | 2025 |
| Rapid Grinding Services Limited | Manufacturing | 1971 |
| Rapidi Moto Ltd | Wholesale & retail | 2021 |
| Rapidspeed Limited | Manufacturing | 1983 |
| RAR Electrical Ltd | Construction | 2023 |
| Rawals Property Management Ltd | Wholesale & retail | 2023 |
| Raysson Limited | Professional & scientific | 2016 |
| RB Global Metelli Limited | Administrative & support | 2020 |
| RB2 Property Limited | Real estate | 2026 |
| RBK Vehicle Services Ltd | Wholesale & retail | 2022 |
| RCB Plumbing & Heating Ltd | Construction | 2021 |
| RCD Electrical Services Ltd | Construction | 2023 |
| Rebecca Louise Logistics Limited | Transport & logistics | 2016 |
| Rectory Farm Barns Limited | Extraterritorial | 2005 |
| Red Brick Trading Ltd | Real estate | 2026 |
| Red Leaf Homes Limited | Real estate | 2021 |
| Red UK Ribbons Ltd | Hospitality | 2023 |
| Regal Motors (Bilston) Limited | Wholesale & retail | 1972 |
| Rehm Collection Ltd | Wholesale & retail | 2025 |
| Rehmat Food Supplies Ltd | Hospitality | 2026 |
| Rehoboth Care and Staffing Limited | Administrative & support | 2019 |
| Rehoboth Tours & Travels Ltd | Administrative & support | 2023 |
| Rene's Deals Ltd | Wholesale & retail | 2025 |
| Retro Stars Ltd | Wholesale & retail | 2022 |
| Revive Beauty Hair & Tanning Ltd | Other services | 2017 |
| Revup Auto Parts Limited | Wholesale & retail | 2025 |
| Revup Parts Ltd | Wholesale & retail | 2025 |
| REX Tyres Ltd | Wholesale & retail | 2025 |
| Reyner's Discount Nursery Ltd | Wholesale & retail | 2017 |
| RG Boxfit Ltd | Arts & recreation | 2018 |
| Rgmbuildingsolutions Limited | Construction | 2023 |
| Rich Developments (UK) Limited | Construction | 2005 |
| RIM Trans Limited | Transport & logistics | 2025 |
| Rivariva Ltd | Wholesale & retail | 2019 |
| Riyas Beauty Ltd | Other services | 2026 |
| RJ and Sons Investments Limited | Financial services | 2013 |
| RJD Venturist Ltd | Real estate | 2026 |
| RJS Foods Ltd | Hospitality | 2020 |
| RM Design Services Ltd | Professional & scientific | 2024 |
| RNB Electrics Limited | Construction | 2024 |
| Rncinstalltaions Ltd | Construction | 2025 |
| Robin Hood Inn Residents Management Limited | Households | 2024 |
| Robin Waters Ltd | Hospitality | 2026 |
| Rocket Pool Bar & Kitchen Ltd | Hospitality | 2025 |
| Roebuck Computers Equipment Ltd | Wholesale & retail | 2023 |
| ROJ0 United Ltd | Hospitality | 2022 |
| Rollsbay Ltd | Real estate | 2016 |
| Rolo Rail Ltd | Construction | 2017 |
| Romes Boxing Ltd | Arts & recreation | 2025 |
| Ronjon Resins Ltd | Manufacturing | 2003 |
| Rookery Stores Ltd | Wholesale & retail | 2004 |
| Roseville MOT Bay Limited | Wholesale & retail | 2009 |
| Rosy Chefs Limited | Hospitality | 2024 |
| ROY Dyke Electrical Limited | Construction | 1998 |
| RR UK Services Ltd | Administrative & support | 2024 |
| RS Foods & Catering Limited | Hospitality | 2025 |
| RS Strong Ltd | Construction | 2025 |
| RS Transportation Ltd | Transport & logistics | 2026 |
| RS17 Ltd | Real estate | 2019 |
| RSA Cuisine Limited | Hospitality | 2016 |
| RSK Holdings Ltd | Real estate | 2017 |
| RSK Residentials Ltd | Real estate | 2025 |
| RST UK Mortgages Ltd | Financial services | 2022 |
| Rst-Properties Ltd | Real estate | 2019 |
| Rt-Et Auto Ltd | Wholesale & retail | 2015 |