| PSC ENG UK Ltd | Professional & scientific | 2021 |
| Psu(Uk) Ltd | Professional & scientific | 2016 |
| Psusupport Ltd | Other services | 2016 |
| Psychology Services for Children and Families Ltd | Health & social care | 2023 |
| Psychsolutions Limited | Health & social care | 2015 |
| PTN Software Ltd | Information & communication | 2016 |
| PUD Promotions Ltd | Professional & scientific | 2022 |
| Puddesign & Consultancy Ltd | Information & communication | 2017 |
| Pujè Limited | Wholesale & retail | 2023 |
| Pulchi Ltd | Wholesale & retail | 2025 |
| Pull the Fuse Ltd | Professional & scientific | 2017 |
| Pulse Archery Limited | Arts & recreation | 2015 |
| Pulse Entertainment Group Ltd | Arts & recreation | 2026 |
| Pulse Health Ltd | Information & communication | 2026 |
| Pulse Pilates & Fitness LLP | | 2013 |
| Pulse Web Services Ltd | Information & communication | 2025 |
| Pump & Praise CIC | Health & social care | 2026 |
| Pump Asylum Ltd | Arts & recreation | 2025 |
| Pump Push Technology Limited | Information & communication | 2023 |
| Pump Subscriptions Ltd | Information & communication | 2023 |
| Pump UP the Party Limited | Arts & recreation | 2026 |
| Punch Pouch Ltd | Manufacturing | 2020 |
| Punk Rock Pigeon Records Ltd | Information & communication | 2025 |
| Punkcocker Animations Limited | Professional & scientific | 2025 |
| Punzel Properties Ltd | Real estate | 2023 |
| Pupilwise Ltd | Information & communication | 2026 |
| Purbhoo Inc UK Limited | Administrative & support | 2025 |
| Purchasing for Good Ltd | Professional & scientific | 2021 |
| Pure Aura Oils Ltd | Manufacturing | 2024 |
| Pure Detox Naturals Limited | Manufacturing | 2025 |
| Pure Peach Beauty Ltd. | Other services | 2024 |
| Pure Premium Ltd | Wholesale & retail | 2025 |
| Pure Rinse Limited | Administrative & support | 2003 |
| Pure RUG Ltd | Wholesale & retail | 2024 |
| Pure Sugarcane Ltd | Wholesale & retail | 2020 |
| Pureshield PPF Ltd | Wholesale & retail | 2026 |
| Purple & Blue Limited | Wholesale & retail | 2019 |
| Purple Crayolá Ltd | Information & communication | 2024 |
| Purple Gecko TLC Ltd | Professional & scientific | 2023 |
| Purple Hive Group Limited | Administrative & support | 2023 |
| Purple Lime Consulting Limited | Professional & scientific | 2017 |
| Purple Luxury Limited | Wholesale & retail | 2024 |
| Purple Motion Ltd | Administrative & support | 2024 |
| Purpose Aligned Design Ltd | Construction | 2024 |
| Pursuing Holiness Ltd | Other services | 2023 |
| PURSUIT4 Ltd | Information & communication | 2012 |
| Puscarie Ltd | Transport & logistics | 2015 |
| Push Marketing Ltd. | Information & communication | 1995 |
| Push to Start Ltd | Information & communication | 2025 |
| Pushforward Education Group Limited | Financial services | 2024 |
| Pushforward POST-16 Education Limited | Education | 2024 |
| Pushforward Primary Education Limited | Education | 2024 |
| Pushforward Primary School Limited | Education | 2024 |
| Pushforward Secondary Education Limited | Education | 2021 |
| Pushforward Secondary School Limited | Education | 2024 |
| Pushforward Youth Support Limited | Education | 2024 |
| Puub Ltd | Information & communication | 2020 |
| PUV Management Ltd | Professional & scientific | 2021 |
| PW Performance Ltd | Wholesale & retail | 2023 |
| PY Consortium Ltd | Hospitality | 2025 |
| Pyrenees Media UK Ltd | Professional & scientific | 2016 |
| Q-Cab Taxi Services Ltd | Transport & logistics | 2025 |
| Q3 R&D Holdings Ltd | Financial services | 2025 |
| QA95 Holdings Limited | Real estate | 2025 |
| Qadeer Motors Ltd | Wholesale & retail | 2025 |
| Qadr Beauty Ltd | Wholesale & retail | 2024 |
| Qantara Trading Ltd | Wholesale & retail | 2026 |
| Qastra Ltd | Wholesale & retail | 2025 |
| Qavah Limited | Professional & scientific | 2026 |
| QCS Investments Limited | Financial services | 2024 |
| Qhsea Ltd | Education | 2025 |
| Qibla Safar Ltd | Administrative & support | 2025 |
| Qlenzo Creative Ltd | Information & communication | 2025 |
| Qorr Ltd. | Information & communication | 2021 |
| QSA Construction Ltd | Construction | 2017 |
| Qscape Ltd | Professional & scientific | 2008 |
| QT Management Ltd | Professional & scientific | 2015 |
| Qtbabies Ltd | Wholesale & retail | 2018 |
| Quadpoint (Sobe) Ltd | Hospitality | 2025 |
| Quadpoint Holdings Ltd | Financial services | 2025 |
| Quadrant Pipelines Limited | Energy | 1990 |
| Quagilance Ltd | Information & communication | 2022 |
| Qualentis Ltd | Professional & scientific | 2025 |
| Qualified Appointments Limited | Professional & scientific | 2006 |
| Qualiflex Biproduct Solutions Limited | Water & waste | 2009 |
| Quality Castings(Slough)Limited | Manufacturing | 1959 |
| Quality Stores Limited | Wholesale & retail | 2008 |
| Qualviq Limited | Information & communication | 2026 |
| Quan Long Limited | Hospitality | 2020 |
| Quantilise Ltd | Information & communication | 2021 |
| Quantum BYT Ltd | Information & communication | 2025 |
| Quantum Engineering Disciplines Ltd | Construction | 2009 |
| Quantum Firetec Ltd | Information & communication | 2023 |
| Quantum Intuition Ltd | Education | 2026 |
| Quantum Pinnacle Ventures Limited | Financial services | 2024 |
| Quantum Secret Limited | Professional & scientific | 2018 |
| Quantumvolt Ltd | Professional & scientific | 2025 |
| Quantumvortexsynergy Ltd | Wholesale & retail | 2025 |
| Quantx Construction Solutions Ltd | Professional & scientific | 2025 |
| Quattro Works Limited | Wholesale & retail | 2020 |