| Prudhoe Property Holdings Limited | Other services | 2023 |
| PS Medicolegal Limited | Financial services | 2013 |
| Psad Private Limited | Information & communication | 2023 |
| PSG Holdings (Salford) Ltd | Financial services | 2022 |
| PSL Properties Ltd | Real estate | 2020 |
| Psych Expert Ltd | Health & social care | 2024 |
| Ptgm Limited | Other services | 2008 |
| Public Sector Partners Limited | Health & social care | 2026 |
| Public Sector Partnership Services Ltd | Public administration | 2010 |
| Public Vision Ltd | Wholesale & retail | 2020 |
| PUL5E Events Ltd | Health & social care | 2024 |
| Pulakudiyil Ltd | Real estate | 2024 |
| Pullbase Limited | Information & communication | 2025 |
| Pulse & Pattern Ltd | Information & communication | 2025 |
| Pulse Clean Energy Development Limited | Construction | 2023 |
| Pulse Clean Energy Finance Limited | Other services | 2021 |
| Pulse Clean Energy Holdings Limited | Other services | 2021 |
| Pulse Clean Energy Limited | Energy | 2009 |
| Pulse Clean Energy Services Limited | Other services | 2024 |
| Pulse Clean Energy Solutions Limited | Other services | 2024 |
| Pulse Clean Energy SPV Anderson Limited | Energy | 2017 |
| Pulse Clean Energy SPV Anning Limited | Energy | 2019 |
| Pulse Clean Energy SPV Bell Limited | Energy | 2022 |
| Pulse Clean Energy SPV Cavendish Limited | Energy | 2022 |
| Pulse Clean Energy SPV Edison Limited | Energy | 2025 |
| Pulse Clean Energy SPV Franklin Limited | Energy | 2021 |
| Pulse Clean Energy SPV Freehold Anderson Limited | Real estate | 2022 |
| Pulse Clean Energy SPV Johnson 1 Ltd | Energy | 2021 |
| Pulse Clean Energy SPV Johnson 2 Ltd | Energy | 2021 |
| Pulse Clean Energy SPV Johnson 3 Ltd | Energy | 2022 |
| Pulse Clean Energy SPV Rubin Limited | Energy | 2021 |
| Pulse Clean Energy SPV Watt Limited | Energy | 2021 |
| Pulse Clean Energy Topco Limited | Other services | 2021 |
| Pulse Clean Energy UK Limited | Energy | 2011 |
| Pulseo Digi Ltd | Information & communication | 2023 |
| Pupula Properties Limited | Real estate | 2019 |
| Pure Distillery Limited | Manufacturing | 2025 |
| Pure Recycling Warwick Limited | Water & waste | 2007 |
| Pure Retail Group Ltd | Wholesale & retail | 2026 |
| Pureflow Ventilations Ltd | Other services | 2026 |
| Puregoldworld Ltd | Information & communication | 2016 |
| Pureko Ltd | Wholesale & retail | 2017 |
| Purple Generations Limited | Administrative & support | 2024 |
| Purple Giraffe Marketing Ltd | Professional & scientific | 2017 |
| Purpleshine Investments Ltd | Real estate | 2026 |
| Purslow NDT Limited | Mining & quarrying | 2022 |
| Putney Bridge Management Company Limited | Real estate | 2025 |
| PW Investment Holdings Ltd | Financial services | 2023 |
| Pwvc London Limited | Professional & scientific | 2014 |
| Pyle Estates Ltd | Other services | 2020 |
| Pylon Labs Ltd | Financial services | 2026 |
| Pyramid Counselling Limited | Health & social care | 2018 |
| Pythia Limited | Financial services | 2012 |
| Q JET Engineering Limited | Professional & scientific | 2026 |
| Qadri and Qureshi General Trading (UK) Ltd | Manufacturing | 2012 |
| Qahani Limited | Information & communication | 2025 |
| QAIM-313 Ltd | Wholesale & retail | 2025 |
| Qarfi Tourism & Hospitality Limited | Hospitality | 2023 |
| QD8 Solutions Limited | Information & communication | 2016 |
| QEW Management Ltd | Real estate | 2024 |
| Qkey-Holdings Ltd | Manufacturing | 2023 |
| QN Street FIFTY5IVE Limited | Construction | 2022 |
| QN Street Limited | Construction | 2019 |
| QS Certs Ltd | Construction | 2026 |
| QT MCR Ltd | Hospitality | 2025 |
| Qualis Residential Developments Limited | Construction | 2017 |
| Quality Accessories Ltd | Manufacturing | 2017 |
| Quality by Randomization Limited | Other services | 2020 |
| Quality Printing Direct Limited | Manufacturing | 2014 |
| Quality Support Ltd | Wholesale & retail | 2019 |
| Qualitykashrus Ltd | Wholesale & retail | 2024 |
| Quan Made Ltd | Professional & scientific | 2024 |
| Quandos Ltd | Construction | 2025 |
| Quanitas Ltd | Transport & logistics | 2020 |
| Quantock Estates Limited | Real estate | 2016 |
| Quantum Merchant Limited | Wholesale & retail | 2020 |
| Quartz Bridge Partners Ltd | Administrative & support | 2025 |
| Quay Financial Administration Ltd | Financial services | 2019 |
| Quay Financial Holdings Ltd | Financial services | 2025 |
| Quay Properties NW Ltd | Real estate | 2024 |
| Quays Group Limited | Financial services | 2019 |
| Quays Wealth Services Limited | Financial services | 2014 |
| Quaytech Enterprises Limited | Information & communication | 2020 |
| Queensway Letting Ltd | Real estate | 2017 |
| Queensway Property Developments Ltd | Real estate | 2014 |
| Queer in Tech CIC | Professional & scientific | 2025 |
| Quentin Wong & Co Manchester Limited | Professional & scientific | 2022 |
| Quest Legal Advocates Limited | Other services | 2017 |
| Quest Personal Care Ltd | Wholesale & retail | 1995 |
| Quest Psychology Services Limited | Health & social care | 2020 |
| Questionmarketing Limited | Information & communication | 2019 |
| Quick FIX Appliances Ltd | Other services | 2025 |
| Quick FIX Manchester Ltd | Other services | 2022 |
| Quick FIX Sales Ltd | Wholesale & retail | 2025 |
| Quick Start MOT Garage Ltd | Wholesale & retail | 2026 |
| Quick Translation Services Ltd | Professional & scientific | 2021 |
| Quickfix Property Services Ltd | Construction | 2025 |
| Quickpick Mini Market Ltd | Wholesale & retail | 2025 |
| Quicksell Store Ltd | Wholesale & retail | 2009 |
| Quickserve Plumbing Ltd | Construction | 2019 |