| Protect Security Services (England) Ltd | Administrative & support | 2023 |
| Proteger Health Ltd | Administrative & support | 2011 |
| Prothero Investments Limited | Real estate | 2020 |
| Prototype Dinning Limited | Wholesale & retail | 2026 |
| Protouch Group Ltd | Administrative & support | 2006 |
| Protouch Janitorial Supplies Ltd | Wholesale & retail | 2006 |
| Protti Farm Ltd | Extraterritorial | 2023 |
| Proud Healthcare Ltd | Health & social care | 2024 |
| Provelo Employment Services Ltd | Other services | 2022 |
| Provelo Group Shared Services Ltd | Health & social care | 2020 |
| Proven Roofing Ltd | Construction | 2026 |
| Provide Equipment Hub Limited | Health & social care | 2024 |
| Providence House (Wallington) Management Company Limited | Households | 2007 |
| Providence Prime Care Ltd | Health & social care | 2023 |
| Provoider Limited | Health & social care | 2013 |
| Prowse Probate & Will Services Limited | Administrative & support | 2001 |
| Proximus Plumbing and Heating Ltd | Construction | 2024 |
| PRP Housing Ltd | Real estate | 2025 |
| PRP Pure Ltd | Wholesale & retail | 2022 |
| PRS Promotions Ltd | Professional & scientific | 2021 |
| PRS Recruitment Solutions Limited | Administrative & support | 2010 |
| Prsr Ltd | Real estate | 2022 |
| Pryce-Less Services Ltd | Transport & logistics | 2019 |
| PS & KK Limited | Real estate | 2023 |
| PS Brothers Construction Ltd | Construction | 2016 |
| PS Cars Ltd | Wholesale & retail | 2023 |
| PS Quality Retail Limited | Wholesale & retail | 2023 |
| PSA Ltd | Professional & scientific | 2015 |
| Psalm 121 Limited | Wholesale & retail | 2009 |
| PSC Electrical London Limited | Construction | 2016 |
| PSJ Law Limited | Professional & scientific | 2025 |
| PSK Builders Limited | Construction | 2017 |
| PSP Consulting Ltd | Information & communication | 2024 |
| PSP Homes (Burgess Hill) Ltd | Real estate | 2011 |
| PSP Lettings (Haywards Heath) Ltd | Households | 2016 |
| PSS International Removals Limited | Transport & logistics | 1992 |
| PSV Paw-Mech Ltd | Wholesale & retail | 2020 |
| Psychological Coaching Clinic Ltd | Other services | 2023 |
| Psyfyi Limited | Information & communication | 2021 |
| PT Online Ltd | Other services | 2017 |
| PT Studio Croydon Limited | Arts & recreation | 2016 |
| PTD Electrical Limited | Construction | 2003 |
| PTF Developments Ltd | Real estate | 2016 |
| PTF Homes Ltd | Real estate | 2020 |
| Public Health Insights (PHI) Ltd | Administrative & support | 2013 |
| Public Library Online Limited | Extraterritorial | 2016 |
| Publicshield Property Management Limited | Households | 1996 |
| Pugsy Ltd | Wholesale & retail | 2015 |
| PUK Tech Limited | Information & communication | 2018 |
| Pulbrook and Gould London Limited | Wholesale & retail | 2019 |
| Pulman and Carroll Limited | Construction | 1977 |
| Pulsar Print Management Ltd | Professional & scientific | 2004 |
| Pulse Health Care Management Limited | Professional & scientific | 2024 |
| Pulse Outdoor Media Holdings Limited | Professional & scientific | 2013 |
| Pulse Outdoor Media Limited | Professional & scientific | 2013 |
| Pulselink-Healthcare Ltd | Public administration | 2025 |
| Punjabi Essence Ltd | Hospitality | 2022 |
| Purcell Electrical Limited | Construction | 2015 |
| Pure Africa Limited | Wholesale & retail | 2016 |
| Pure Food Production Ltd | Manufacturing | 2012 |
| Pure Foods Systems Holdings Limited | Manufacturing | 2013 |
| Pure Foods Systems Limited | Wholesale & retail | 1996 |
| Pure Hair London Ltd | Wholesale & retail | 2019 |
| Pure Life London Ltd | Manufacturing | 2023 |
| Pure Lines Jewels Limited | Wholesale & retail | 2025 |
| Pure Real Estate Services Ltd | Professional & scientific | 2010 |
| Pure Sync Cleaning Services Limited | Administrative & support | 2025 |
| Pure Vend Limited | Wholesale & retail | 2019 |
| Pure Vision Window Cleaning Ltd | Administrative & support | 2026 |
| Pure-Solutions (South East) Limited | Administrative & support | 2014 |
| Pureform Furnitures Ltd | Other services | 2024 |
| Pureheart Healthcare Ltd | Administrative & support | 2025 |
| Purenest Professional Cleaning Services Ltd | Administrative & support | 2026 |
| Purete Nature Ltd | Manufacturing | 2014 |
| Puretech Racing Limited | Arts & recreation | 2004 |
| Purewater (London) Limited | Other services | 2014 |
| Purfleet Quay Residents Association Limited | Households | 2020 |
| Purley Cars Limited | Transport & logistics | 2025 |
| Purley Construction Services Limited | Professional & scientific | 2013 |
| Purley Food Centre Ltd | Wholesale & retail | 2023 |
| Purma Croft Limited | Wholesale & retail | 2024 |
| Purple Coin Limited | Real estate | 2017 |
| Purple Construction Limited | Construction | 1972 |
| Purple FOX Property Ltd | Real estate | 2022 |
| Purple Pebbles (Childcare Services) Ltd | Hospitality | 2010 |
| Purple Rain London Limited | Public administration | 2021 |
| Purple Shopfitters Limited | Construction | 2021 |
| Purple Soul Club Limited | Health & social care | 2025 |
| Purpose Bakery Ltd | Manufacturing | 2019 |
| Purpose Bakes CIC | Manufacturing | 2026 |
| Purpose Build Connections Ltd | Real estate | 2023 |
| Purposebound Global CIC | Education | 2025 |
| Purshay Ltd Ltd | Wholesale & retail | 2023 |
| Purva Pushya Properties Limited | Real estate | 2025 |
| Purvaani Limited | Health & social care | 2020 |
| Push Legal Services Ltd | Professional & scientific | 2015 |
| Pushonestop Limited | Information & communication | 2020 |
| Pushpaanjli Ltd | Real estate | 2017 |
| Pushti and Pavitra Limited | Professional & scientific | 2024 |
| Putney BED Centre Limited | Wholesale & retail | 2000 |