| Pinakin Housing Limited | Real estate | 2023 |
| Pine Grove Design & Build Limited | Construction | 2021 |
| Pine Grove Homes Limited | Real estate | 2019 |
| Pine Oak Ltd | Professional & scientific | 2023 |
| Pineway Estates Limited | Real estate | 1990 |
| Pink Python Limited | Real estate | 2024 |
| Pinkstar Limited | Real estate | 2003 |
| Pinn Ltd | Real estate | 2022 |
| Pinn Publishers Ltd | Information & communication | 2025 |
| Pinn Real Estate Services Ltd | Real estate | 2019 |
| Pinn Recruit Care & Support Ltd | Administrative & support | 2026 |
| Pinnacle Acoustic Consultants Limited | Professional & scientific | 2020 |
| Pinncit Ltd | Information & communication | 2019 |
| Pinner Bella Roma Limited | Hospitality | 2025 |
| Pinner Eruv Company Limited | Construction | 2011 |
| Pinner Foods Limited | Hospitality | 2023 |
| Pinner Green Management Limited | Professional & scientific | 1989 |
| Pinner Hill Golf Club Limited | Arts & recreation | 1947 |
| Pinner Hill Golf Club Trading Limited | Arts & recreation | 2017 |
| Pinner Hill Services Ltd | Households | 2024 |
| Pinner London Ltd | Other services | 2025 |
| Pinner Music Academy Limited | Other services | 2020 |
| Pinner Pizza Ltd | Hospitality | 2023 |
| Pinner Property Estates Ltd | Real estate | 2022 |
| Pinner Property Investments Limited | Professional & scientific | 2021 |
| Pinner Service Ltd | Hospitality | 2021 |
| Pinner Tiffins Limited | Hospitality | 2025 |
| Pinner Trading Ltd | Real estate | 2020 |
| Pinner Windows and Doors Ltd | Construction | 2016 |
| Pinnerhouse Limited | Professional & scientific | 2019 |
| Pinnerica Limited | Real estate | 2017 |
| Pinnerpal Ltd | Professional & scientific | 2013 |
| Pinnerwood Properties Limited | Construction | 1972 |
| Pinnora Ltd | Manufacturing | 2014 |
| Pinnova Properties Ltd | Real estate | 2024 |
| PIT Stop Specialists Ltd | Wholesale & retail | 2025 |
| Pitstopgo Limited | Wholesale & retail | 2025 |
| Pitt and Paddock Ltd | Administrative & support | 2022 |
| PJ Mckenna Holdings Limited | Financial services | 2024 |
| PJK Construction Ltd | Construction | 2021 |
| Pjspark Innovations Limited | Professional & scientific | 2025 |
| Planet of Events Ltd | Construction | 2024 |
| Planna Consulting Limited | Professional & scientific | 2024 |
| Planned Technical Services Limited | Professional & scientific | 2019 |
| Platinum Cars Rental Ltd | Administrative & support | 2025 |
| Platinum Home Group Limited | Health & social care | 2017 |
| Platt Orthopaedics Ltd | Health & social care | 2021 |
| Play a Way Childcare Limited | Health & social care | 2024 |
| Play a Way Nurseries Limited | Health & social care | 2017 |
| Play a Way Properties Limited | Real estate | 2017 |
| Playlabs Technologies Limited | Information & communication | 2025 |
| PLD Warehouse Ltd | Administrative & support | 2020 |
| Plok Tech Limited | Other services | 2019 |
| Plover Investment Ltd | Real estate | 2017 |
| Plum Brands Ltd | Professional & scientific | 2010 |
| Plumb London Ltd | Construction | 2005 |
| Plumb London Solutions Ltd | Extraterritorial | 2011 |
| Plummerden Estates Limited | Real estate | 2013 |
| Plummerden Lane Vineyards Limited | Manufacturing | 2013 |
| Plush of Aldergrove Ltd | Other services | 2012 |
| Plutoland Limited | Real estate | 1982 |
| PM and MM Consultants Limited | Health & social care | 2015 |
| PM Karia and SON Investments Limited | Real estate | 2020 |
| Pmis Developments NO. 1 Limited | Construction | 2026 |
| PMK Hayes Limited | Real estate | 2024 |
| Pmpv Private Limited | Real estate | 2016 |
| Pmto Investments Limited | Real estate | 2024 |
| Pneumatic Services (London) Limited | Professional & scientific | 1980 |
| PNS Property Ltd | Real estate | 2025 |
| Podadey Limited | Wholesale & retail | 2024 |
| POL London Ltd | Wholesale & retail | 2022 |
| Pollywogs Montessori & Childcare Ltd | Education | 2018 |
| Polypol Ltd | Professional & scientific | 2020 |
| Pomirleanu Ltd | Transport & logistics | 2017 |
| Poonam Sweet Centre Limited | Real estate | 2023 |
| Poonams Limited | Hospitality | 2007 |
| Pooni Corporate Ltd | Wholesale & retail | 2016 |
| POP Assets Management Ltd | Real estate | 2019 |
| Popcorn Impact Ventures Ltd | Information & communication | 2023 |
| Popstarz Parties & Events Ltd | Extraterritorial | 2024 |
| Portland DIY Ltd | Wholesale & retail | 2019 |
| Portland Pharma Limited | Financial services | 2019 |
| Posai Ltd | Information & communication | 2020 |
| Posh Car Wash Ltd | Other services | 2012 |
| Postgrad Limited | Real estate | 1997 |
| Postmodern Renaissance Limited | Real estate | 2021 |
| Pounds and Dollars Tree Ltd | Transport & logistics | 2021 |
| Power Engineering Consultancy Services Ltd | Professional & scientific | 2016 |
| Power to Live Limited | Health & social care | 2023 |
| Powerplay 38 Hockey Limited | Arts & recreation | 2019 |
| Ppdent Ltd | Health & social care | 2025 |
| PPR Healthcare Limited | Health & social care | 2017 |
| PR Propco Ltd | Real estate | 2019 |
| PR Utilities Limited | Construction | 2026 |
| Praful Morar Ltd | Professional & scientific | 2023 |
| Pragmatic Consultancy Services Ltd | Information & communication | 2015 |
| Pragmatik Limited | Information & communication | 2017 |
| Pragya Limited | Administrative & support | 2022 |
| Pramukh FIC Limited | Real estate | 2018 |
| Pramukh Keshav Properties Ltd | Real estate | 2017 |