| Prometheus Hope Limited | Professional & scientific | 2013 |
| Prometheus Solutions Limited | Construction | 2023 |
| Properties Domain Ltd | Real estate | 2018 |
| Property Acquisitions Limited | Real estate | 2007 |
| Property Security Services (PSS) Ltd | Other services | 2019 |
| Property With Karene Limited | Real estate | 2014 |
| Propertysec Ltd | Professional & scientific | 2020 |
| Proski Investments Limited | Other services | 2014 |
| Prospec FM Ltd | Manufacturing | 2017 |
| Prosport Sunscreen Limited | Wholesale & retail | 1990 |
| Protea Catering Ltd | Hospitality | 2025 |
| Provalet London Ltd | Administrative & support | 2018 |
| Providential Property Holdings Limited | Real estate | 2016 |
| Prozone Health Ltd | Other services | 2021 |
| Prudentia Today Limited | Professional & scientific | 2020 |
| PSH Inventories Limited | Administrative & support | 2020 |
| PSM Line Marking Ltd | Construction | 2026 |
| PSM Surfacing and Line Marking Ltd | Construction | 2019 |
| Public Focus Limited | Extraterritorial | 1985 |
| Public Service Broadcasting Trust | Education | 1987 |
| Puebla Charitable Trust Limited(The) | Health & social care | 1984 |
| Puffin's Childcare Providers Limited | Health & social care | 2018 |
| Pulborough Community Investment Group Limited | Real estate | 2020 |
| Pullen Architecture Limited | Professional & scientific | 2013 |
| Pullen Properties Ltd | Real estate | 2015 |
| Pulse-Tech Home and Marine Limited | Administrative & support | 2009 |
| Puma Engineering Limited | Administrative & support | 2008 |
| Pumba Consulting Limited | Professional & scientific | 2012 |
| Purcel Z Plumbing & Construction Limited | Construction | 2016 |
| Pure Hygienic Surfaces Ltd | Construction | 2019 |
| Purley Ventures Limited | Construction | 2011 |
| Purple Anubis Group Ltd | Financial services | 2026 |
| Purple Lighting Ltd | Arts & recreation | 2014 |
| Purple Meridian Property Ltd | Real estate | 2026 |
| Purplek Ltd | Wholesale & retail | 2018 |
| Purposebridge Limited | Information & communication | 2016 |
| Push IT Games Ltd | Information & communication | 2017 |
| Puzzle Investments Limited | Professional & scientific | 2026 |
| PV Lansdale Properties LLP | | 2025 |
| PVT MED Ltd | Administrative & support | 2023 |
| PW Dons Limited | Arts & recreation | 2022 |
| PW Products Ltd | Construction | 2011 |
| PWR Touring Ltd | Arts & recreation | 2019 |
| Pyedene Limited | | 1985 |
| Q Hair & Beauty (Chichester) Ltd | Other services | 2007 |
| Q Hair & Beauty (Donnington) Ltd | Other services | 2018 |
| Q Hair & Beauty (Group) Ltd | Financial services | 2016 |
| Q Hair & Beauty (Midhurst) Ltd | Other services | 2016 |
| Q Properties Ltd. | Hospitality | 2015 |
| QD Cafe Ltd | Hospitality | 2025 |
| QED Finance Limited | Administrative & support | 2018 |
| Qiang Sheng Investment Limited | Professional & scientific | 2025 |
| QOL Technologies Limited | Health & social care | 1999 |
| Quadrant Asset Management Limited | Real estate | 2013 |
| Quaker's Court Management Limited | Real estate | 2015 |
| Quality First Decorators Ltd | Construction | 2012 |
| Quality Management Concepts Limited | Extraterritorial | 2010 |
| Quantic Software Limited | Information & communication | 2020 |
| Quantica Consultants Limited | Professional & scientific | 2024 |
| Quantitative AI Ltd | Information & communication | 2025 |
| Quantum Computing Ltd | Information & communication | 2019 |
| Quantum Cooling Dispense and Refridgeration Services LLP | | 2006 |
| Quantum Cooling Technology Ltd. | Administrative & support | 1998 |
| Quantum Group Renewables LLP | | 2007 |
| Quantum Renewable Innovation Limited | Manufacturing | 2022 |
| Quarrie Consultancy Ltd | Professional & scientific | 2024 |
| Quattromac Limited | Financial services | 2020 |
| Quay Carpentry Construction Ltd | Construction | 2025 |
| Queens Road Limited | Real estate | 2017 |
| Quest Exhibits Ltd | Construction | 2010 |
| Quest Fire Safety Consultants Ltd | Public administration | 2017 |
| Queue-Safe Limited | Wholesale & retail | 2012 |
| Quick FIX Mobile Limited | Wholesale & retail | 2017 |
| Quicksilver Exhausts Limited | Wholesale & retail | 1983 |
| Quiet Blue Limited | Wholesale & retail | 2023 |
| Quiet Collective Limited | Manufacturing | 2025 |
| Quiet Joy Ltd | Information & communication | 2024 |
| Quinn Finance Ltd | Financial services | 2013 |
| R & J Developments (Sussex) Limited | Construction | 2023 |
| R & SA Knight Limited | Construction | 2019 |
| R & SD Properties Limited | Other services | 2018 |
| R C Fuller Limited | Construction | 2006 |
| R Davy LLP | | 2021 |
| R J B Builders Ltd | Construction | 2021 |
| R J Withers Limited | Health & social care | 2002 |
| R L F Site Management Services Limited | Construction | 2016 |
| R W Paxman Ltd | Administrative & support | 2003 |
| R-Co UK Group Limited | Wholesale & retail | 2024 |
| R.C.Langmead Limited | Agriculture & fishing | 1959 |
| R.E.D. Transport Services Limited | Transport & logistics | 2012 |
| R.L.Austen Unlimited | Wholesale & retail | 1947 |
| R2S Brickwork Ltd | Construction | 2021 |
| RAD Management Consultants Limited | Professional & scientific | 2013 |
| RAD Propulsion Ltd | Professional & scientific | 2018 |
| RADICE77 Ltd | Construction | 2023 |
| Radio Frequency Design Ltd | Information & communication | 2016 |
| Radiology Assistance Ltd | Health & social care | 2014 |
| Radwan Pyramid Construction Limited | Arts & recreation | 2021 |
| Raffles Capital Limited | Construction | 2013 |
| Raglan Court Resident's Association Limited | Households | 1968 |