| PTS-247 Limited | Transport & logistics | 2013 |
| PTS365 Ltd | Transport & logistics | 2024 |
| Public House Chat Ltd | Information & communication | 2026 |
| Publishers Workflow Solutions Limited | Arts & recreation | 2007 |
| Puchbud Limited | Construction | 2014 |
| Pulse Gear Fitness Ltd | Wholesale & retail | 2025 |
| Pulse.Aero Limited | Information & communication | 2012 |
| Pulsetec Services Limited | Construction | 2008 |
| Punch Glass Studios Ltd | Information & communication | 2026 |
| Punnoo Ltd | Information & communication | 2015 |
| Pura Stone Limited | Manufacturing | 2018 |
| Pure & Hearty Limited | Manufacturing | 2018 |
| Pure Genius Facilities Management Ltd | Administrative & support | 2011 |
| Pure Genius Holdings Limited | Professional & scientific | 2008 |
| Pure Genius Properties Limited | Real estate | 2009 |
| Pure Oyster Company Limited(The) | Wholesale & retail | 1907 |
| Pure Sports Limited | | 2007 |
| Purepoint Cleaning Ltd | Administrative & support | 2025 |
| Purity Property Limited | Real estate | 2024 |
| Purley Coffee Zone Ltd | Hospitality | 2020 |
| Purley Painting and Plastering Limited | Construction | 2017 |
| Purple Growth Ltd | Extraterritorial | 2024 |
| Purple Halo Ltd | Professional & scientific | 2022 |
| Purple House Mortgages & Finance Limited | Financial services | 2017 |
| Purple Lace Hair Ltd | Wholesale & retail | 2026 |
| Purple Property People Limited | Education | 2014 |
| PVA Products UK Ltd | Manufacturing | 2025 |
| PVS Analytical Ltd | Administrative & support | 2025 |
| PW First Class Transport Ltd | Administrative & support | 2025 |
| Pythagoras Theorem Ltd | Information & communication | 2022 |
| Q-Squared Consulting Limited | Professional & scientific | 2017 |
| Qasoph Property Ltd | Real estate | 2024 |
| Qaswa Law Ltd | Professional & scientific | 2022 |
| Qcat International Limited | Professional & scientific | 2016 |
| QED Holdings Ltd | Financial services | 2018 |
| Qmechanics Ltd | Information & communication | 2024 |
| Qnaxx Operator Ltd | Manufacturing | 2017 |
| QS Cars Ltd | Transport & logistics | 2025 |
| QSA Global Private Limited | Education | 2025 |
| Quadruple J Limited | Health & social care | 2024 |
| Qualident Cosmetic Limited | Health & social care | 2018 |
| Qualifyanywhere Limited | Education | 2025 |
| Qualis Home Care Limited | Health & social care | 2020 |
| Qualis Property Management Ltd | Construction | 2020 |
| Quality Parking Ltd | Transport & logistics | 2022 |
| Quality Vocational Learning Solutions Ltd | Education | 2025 |
| Quantum Academy Ltd | Education | 2025 |
| Quantum Bells Ltd | Construction | 2026 |
| Quantum Business Limited | Construction | 1993 |
| Quantum Electrical Distribution Ltd | Wholesale & retail | 2017 |
| Quantum Estate Solutions Ltd | Real estate | 2024 |
| Quantum Security Group Ltd | Administrative & support | 2021 |
| Quantumedge IT Ltd | Other services | 2025 |
| Quarters of Sussex Limited | Extraterritorial | 2016 |
| Quayside Editorial Ltd | Information & communication | 2012 |
| QUE Removal Ltd | Transport & logistics | 2019 |
| Questrisk Management Services Limited | Professional & scientific | 2012 |
| Quick Pro PAY Limited | Administrative & support | 2026 |
| Quick Resources Ltd | Other services | 2021 |
| Quickrooms.London Ltd | Real estate | 2015 |
| Quickshift U.K. Ltd | Transport & logistics | 1998 |
| Quid Pro Payments Limited | Administrative & support | 2026 |
| Quills-Limpio MPS Limited | Wholesale & retail | 2014 |
| QUO Money Holdings Limited | Financial services | 2019 |
| Quoin Flats Limited | Households | 2020 |
| Quooky Limited | Professional & scientific | 2015 |
| QYN Ltd | Wholesale & retail | 2024 |
| R & M Autocare Limited | Wholesale & retail | 2011 |
| R & N Accounting Services Ltd | Professional & scientific | 2019 |
| R - Tech Global Construction & Properties Limited | Water & waste | 2023 |
| R a Contractors (UK) Limited | Construction | 2014 |
| R a Registrars Ltd | Extraterritorial | 2006 |
| R G Mattey Limited | Health & social care | 2008 |
| R G Pope Ltd | Real estate | 2021 |
| R J Billups Limited | Professional & scientific | 2021 |
| R J Cars Ltd | Transport & logistics | 2018 |
| R Ryan Builders Limited | Construction | 2010 |
| R Steel Solutions Limited | Information & communication | 2014 |
| R W Allen & Sons Limited | Construction | 2015 |
| R Walker Consultancy Services Limited | Professional & scientific | 2011 |
| R World Wide Ltd | Wholesale & retail | 2020 |
| R&I Global Enterprise Ltd | Wholesale & retail | 2025 |
| R&M Carpentry Limited | Construction | 2012 |
| R&P Consultancy Ltd | Construction | 2016 |
| R&R Construction Ltd | Construction | 2011 |
| R&T Labs Ltd | Wholesale & retail | 2023 |
| R.M Auto Repair Specialist Ltd | Wholesale & retail | 2024 |
| R.M. Aerosupport Limited | Manufacturing | 2016 |
| R.S.E. Heating Services (Crawley) Limited | | 1982 |
| R/S Aircraft Engineering Ltd | Manufacturing | 2023 |
| R1K Solutions Ltd | Construction | 2020 |
| R2P Holdings Limited | Information & communication | 2006 |
| R2P UK Systems Limited | Information & communication | 2006 |
| R3XAA Logistical Solutions Ltd. | Wholesale & retail | 2022 |
| R3XAA Transport Ltd. | Transport & logistics | 2022 |
| RA16 Limited | Wholesale & retail | 2025 |
| RAA Couriers Ltd | Transport & logistics | 2020 |
| Raaha Enterprises Ltd | Wholesale & retail | 2026 |
| Raazz & Co Ltd | Wholesale & retail | 2025 |
| Rabiah Mahmood Ltd | Administrative & support | 2018 |