| Product Solutions Catalysis Ltd | Professional & scientific | 2001 |
| Production Matters (Media) Ltd | Professional & scientific | 2017 |
| Productionaudio Ltd | Administrative & support | 2011 |
| Proexpo (Europe) Limited | Administrative & support | 2022 |
| Professional Gardener Service Surrey Ltd | Administrative & support | 2024 |
| Proficient Property Services Limited | Construction | 2018 |
| Profitability Solutions Limited | Professional & scientific | 2008 |
| Profitable Business Intelligence Limited | Information & communication | 2012 |
| Profound Fitness Studios Limited | Arts & recreation | 2020 |
| Profound Ideas Limited | Information & communication | 2015 |
| Profox Consulting Limited | Professional & scientific | 2016 |
| Profreight Logistics Limited | Administrative & support | 2004 |
| Proftran Ltd | Professional & scientific | 2004 |
| Profumi Neapolitan Pizza Ltd | Hospitality | 2025 |
| Progenitor Properties Ltd | Real estate | 2024 |
| Progressive Expert Ltd | Construction | 2017 |
| Proguard Appliances Limited | Other services | 2025 |
| Project 114 Ltd | Hospitality | 2013 |
| Project Caerus LLP | | 2010 |
| Project Customer Services Ltd | Manufacturing | 2019 |
| Project Drive Limited | Education | 2020 |
| PROJECT4 Asset Management Limited | Professional & scientific | 2011 |
| Promise Pictures Limited | Information & communication | 2014 |
| Promologistics Limited | Transport & logistics | 2007 |
| Prompt Response Property Services Ltd | Households | 2019 |
| Proofpacksai Ltd | Information & communication | 2025 |
| PROP3RTY Limited | Real estate | 2022 |
| Proper Clever Ltd | Information & communication | 2023 |
| Proper Code Ltd | Information & communication | 2014 |
| Property Mann Ltd | Households | 2023 |
| Property Mediation Chambers Limited | Administrative & support | 2012 |
| Property Mediators Limited | Administrative & support | 2013 |
| Property Yield Ltd | Information & communication | 2025 |
| Prophesy Solutions Limited | Information & communication | 2024 |
| Proprli Ltd | Administrative & support | 2018 |
| Propulsion Technologies Limited | Manufacturing | 2016 |
| Proservetennis Ltd | Arts & recreation | 2023 |
| Prosmore Maintenance Limited | Construction | 2025 |
| Prospernet Solutions Limited | Professional & scientific | 2023 |
| Prospero UX Ltd | Professional & scientific | 2012 |
| Protostream Limited | Information & communication | 2019 |
| Prottégé Ltd | Professional & scientific | 2026 |
| Proud Tiger Judo Limited | Education | 2019 |
| Proven Agile Transformation Limited | Information & communication | 2017 |
| Proviapropertyservices Ltd | Construction | 2026 |
| Provida Solution Ltd | Transport & logistics | 2014 |
| Providence Place Limited | Financial services | 2021 |
| Province Limited | Other services | 2024 |
| Prudentia Solutions Limited | Professional & scientific | 2012 |
| Prvlgd Ltd | Wholesale & retail | 2018 |
| PST Portugal Ltd. | Administrative & support | 2023 |
| Psychic City Ltd | Wholesale & retail | 2024 |
| PT Lane Ltd | Construction | 2020 |
| PTB Consult Ltd | Professional & scientific | 2023 |
| Public Speaking London Ltd | Education | 2019 |
| Puppy Media Limited | Professional & scientific | 2014 |
| Pure Cream Ltd | Wholesale & retail | 2025 |
| Pure Logistic Solutions Ltd | Transport & logistics | 2019 |
| Pure Moments Ltd | Health & social care | 2023 |
| Pure Oral Ltd | Wholesale & retail | 2025 |
| Purely Angling Ltd | Agriculture & fishing | 2020 |
| Purevision Optical Limited | Health & social care | 2012 |
| Purple Cusp Ltd | Health & social care | 2024 |
| Purple Delta Ltd | Information & communication | 2026 |
| Purple Penguin Properties Limited | Real estate | 2017 |
| Purple Solace Care Ltd | Health & social care | 2026 |
| Purss Services Limited | Construction | 2001 |
| PWM Limited | Professional & scientific | 2008 |
| Pyle Hill Limited | Households | 1973 |
| Pyle Hill Silverley Limited | Households | 2024 |
| Pyramid Recruitment Limited | Administrative & support | 2006 |
| Pyrford Consulting Ltd | Administrative & support | 2025 |
| Pyrford Electrical Ltd | Manufacturing | 2005 |
| Pyrford Heating Ltd | Construction | 2025 |
| Pyrford Wills Limited | Other services | 2022 |
| Pyrford Wood Smallholding Ltd | Agriculture & fishing | 2025 |
| Pyrford Woods Road Association Limited | Households | 1969 |
| Q a Rajaa Real Estates Ltd | Real estate | 2026 |
| Q& J Hospitality Ltd | Hospitality | 2021 |
| QAA Properties Ltd | Real estate | 2024 |
| Qasia Tech Ltd | Wholesale & retail | 2024 |
| Qatana Asset Solutions Limited | Administrative & support | 2008 |
| Qatana Limited | Extraterritorial | 2022 |
| Qconnect Solutions Limited | Information & communication | 2007 |
| QI Properties Limited | Real estate | 2025 |
| Qiuguo Harvest Ltd | Education | 2024 |
| Quadrelom Limited | Real estate | 2016 |
| Quadrivial Limited | Real estate | 2023 |
| Quality Care 4 YOU Ltd | Other services | 2021 |
| Quality Italian Cuisine Limited | Hospitality | 2017 |
| Quant FIN Ltd | Information & communication | 2025 |
| Quant Homes Limited | Real estate | 2023 |
| Quantasight Limited | Information & communication | 2022 |
| Quants Estimating Ltd | Construction | 2007 |
| Quantum Futures Global Ltd | Administrative & support | 2021 |
| Quantum Futures International Limited | Administrative & support | 2024 |
| Quantum Solutions Group Ltd | Manufacturing | 2019 |
| QUANTUM3 Studio Ltd | Manufacturing | 2025 |
| Quark (Supplies) Ltd. | Transport & logistics | 1992 |
| Quartz-Black Limited | Administrative & support | 2025 |