| Purr Creative Ltd | Professional & scientific | 2012 |
| Pushkin Property Limited | Real estate | 2026 |
| PV Solar Installers Limited | Construction | 2023 |
| PVM (Atherstone) Limited | Real estate | 2023 |
| PVM Topco Limited | Financial services | 2025 |
| PWG Veterinary Services Limited | Professional & scientific | 2026 |
| Pyramid Screen Products Limited | Wholesale & retail | 2003 |
| Pyramid Textiles Limited | Wholesale & retail | 2010 |
| PYX Consulting Ltd | Professional & scientific | 2020 |
| Q&S Intl UK Ltd | Construction | 2012 |
| Q-Flo Limited | Professional & scientific | 2004 |
| Q.O.B Services Ltd | Construction | 2020 |
| Qallet Wallet Company Limited | Financial services | 2020 |
| QLO Capital Limited | Financial services | 2013 |
| QM Services Ltd | Wholesale & retail | 2025 |
| QP Construction Ltd | Construction | 2018 |
| QS London Consultants Ltd | Professional & scientific | 2023 |
| Qualex Consulting Limited | Administrative & support | 2007 |
| Quality Performance Parts Limited | Extraterritorial | 2011 |
| Quarry Project CIC | Education | 2025 |
| Quattro Homes Ltd | Real estate | 2022 |
| Quay Street Nominees Limited | Administrative & support | 2008 |
| Quayside Homes Holdings Limited | Professional & scientific | 2001 |
| Quayside Homes Limited | Construction | 2003 |
| QUB Design Limited | Professional & scientific | 2023 |
| Qube Training Ltd | Education | 2025 |
| Queluz Finance LLP | | 2005 |
| Quercus 7 Limited | Real estate | 2015 |
| Quercus Housing Limited | Real estate | 2018 |
| Quest Campers Ltd | Administrative & support | 2022 |
| Queste Design Consultants Limited | Professional & scientific | 2007 |
| Quickway Buildings Limited | Extraterritorial | 1946 |
| Quiet Power Ltd | Other services | 2025 |
| Quintessential Trading Ltd | Real estate | 2012 |
| Quix Innovation Services Ltd | Professional & scientific | 2022 |
| QYP Ltd | Construction | 2025 |
| R & B Scaffold (South East) Limited | Construction | 2010 |
| R & D Medical Limited | Professional & scientific | 2012 |
| R & D Tech Sales Limited | Information & communication | 2021 |
| R & H Dupree Ltd | Information & communication | 2012 |
| R & M Goldsmith Builders Limited | Construction | 2005 |
| R Dougal Construction Limited | Construction | 2024 |
| R Edmunds Ltd | Professional & scientific | 2023 |
| R G Earl & Company Limited | Construction | 2001 |
| R G Webber Limited | Construction | 2003 |
| R H Fashions Ltd | Wholesale & retail | 2019 |
| R I S Enterprise Ltd | Professional & scientific | 2025 |
| R J H Property Renovations Ltd | Construction | 2025 |
| R M S Recruitment Limited | Administrative & support | 2000 |
| R Richardson Limited | Health & social care | 2016 |
| R&L Trading and Consultancy Ltd | Professional & scientific | 2021 |
| R&N Consulting Ltd | Professional & scientific | 2020 |
| R. Barker (Peckham) Ltd | Extraterritorial | 2014 |
| R.E. Twomlow Limited | Construction | 1965 |
| R.M.Brookes Limited | Construction | 1957 |
| R.T.Quaife Engineering Limited | Manufacturing | 1965 |
| R1CH Group Limited | Construction | 2021 |
| R5FI Limited | Administrative & support | 2015 |
| Rabbcom Limited | Professional & scientific | 2020 |
| Rabbow and Co LLP | | 2011 |
| Racemaker Limited | Other services | 1976 |
| Rach AMY K Limited | Hospitality | 2026 |
| Rachel Macgadie Design Ltd | Professional & scientific | 2017 |
| Radas Fitness Ltd | Arts & recreation | 2019 |
| Radial Electrical Services Limited | Extraterritorial | 2013 |
| Radnor House School (Holdings) Limited | Education | 2010 |
| Radnor House School (Topco) Limited | Education | 2019 |
| Radnor House Sevenoaks (Holdings) Limited | Education | 2015 |
| Radnor House Sevenoaks (Property) Limited | Education | 2015 |
| Radnor House Sevenoaks Limited | Education | 2015 |
| Raeburn Contractors Limited | Administrative & support | 2018 |
| Rafael Martins Stone Ltd | Administrative & support | 2017 |
| Raffles Lease (U.K.) Limited | Transport & logistics | 2013 |
| Ragstones Management Limited | Households | 2005 |
| Railway Holdings Limited | Households | 2018 |
| Rain Investment Consultancy Ltd | Professional & scientific | 2024 |
| Rain Residential Ltd | Real estate | 2026 |
| Rainbow OUT of School Clubs Limited | Education | 2010 |
| Rainbow Rogers Limited | Professional & scientific | 2015 |
| Rainbows & Butterflies Childcare Ltd | Health & social care | 2019 |
| Raincoatfish Ltd | Professional & scientific | 2020 |
| Rainsford Contracts Limited | Construction | 1997 |
| Rainsford Developments Limited | Construction | 2013 |
| RAJ Borough Limited | Hospitality | 2018 |
| RAJ Restaurant (Kent) Ltd | Hospitality | 2024 |
| RAM Ventures Limited | Administrative & support | 2015 |
| Ramac Construction Co Limited | Extraterritorial | 1972 |
| Ramac Group Limited | Professional & scientific | 2003 |
| Ramac Holdings (Trading) Limited | Construction | 2001 |
| Ramada Gardens Oxford Limited | Construction | 2023 |
| Ramada Homes Ltd. | Construction | 2020 |
| Ramel Power Systems Limited | Other services | 1993 |
| Randall Hill Ltd | Construction | 2025 |
| Random Number Generator Limited | Administrative & support | 2020 |
| Random Trading Group Ltd | Financial services | 2023 |
| Range Evolution Partners Ltd | Wholesale & retail | 2025 |
| Ranjan Suri Limited | Professional & scientific | 2010 |
| Rapesco Group Limited | Financial services | 2015 |
| Rapesco Holdings Public Limited Company | Financial services | 2003 |
| Rapesco Office Products PLC | Manufacturing | 1959 |