| P & M Superstore Limited | Wholesale & retail | 2026 |
| P & R Properties Limited | Real estate | 1999 |
| P K Groundworks Limited | Construction | 2017 |
| P K T Transport Solutions Ltd | Transport & logistics | 2024 |
| P.H Jones Group Limited | Professional & scientific | 2008 |
| Packgenie Limited | Other services | 2018 |
| Paddington Ventures Limited | Real estate | 2024 |
| Padel Centro Group Limited | Arts & recreation | 2026 |
| Padwil Holdings Ltd | Financial services | 2019 |
| Page Solutions Limited | Information & communication | 2007 |
| Paints Social Limited | Wholesale & retail | 2025 |
| Pale Blue Limited | Professional & scientific | 2022 |
| Palesa Tshabalala Masinga Limited | Health & social care | 2015 |
| Paperclip Solutions Limited | Professional & scientific | 2018 |
| Paragon Accounts Solutions Limited | Professional & scientific | 2015 |
| Paramveer Food and Wine Limited | Wholesale & retail | 2020 |
| Parapharm Development Limited | Wholesale & retail | 2016 |
| Parcae Limited | Professional & scientific | 2021 |
| Park Day Nursery (Reading) Ltd | Health & social care | 2013 |
| Park Electric Limited | Other services | 2019 |
| Park Wood (Banstead) Management Company Limited | Households | 2012 |
| Parker Solutions Limited | Information & communication | 2007 |
| Parkview Lodge Management Company Limited | Households | 2008 |
| Parsons Architecture & Design Ltd | Extraterritorial | 2013 |
| Partnerworks Ltd | Professional & scientific | 2024 |
| Pass the Keys (South) Ltd | Hospitality | 2019 |
| Passiflora Gardens Ltd. | Administrative & support | 2019 |
| Pathfinder Equity Partners Limited | Financial services | 2021 |
| Pathfinder Venture Partners LLP | | 2021 |
| Pathway Labs Ltd | Education | 2026 |
| Pathway Medical Consulting Ltd | Professional & scientific | 2024 |
| Pathway Networks Ltd | Education | 2020 |
| Pathways 4 Care Ltd | Health & social care | 2005 |
| Pathways Care Group Limited | Health & social care | 1997 |
| Pathways Daycare Limited | Administrative & support | 1998 |
| Patrick Murphy Osteopaths Limited | Health & social care | 2021 |
| Paul Knight Consultancy Ltd | Professional & scientific | 2024 |
| Pawmar IT Ltd | Information & communication | 2016 |
| Payments 247 Ltd | Financial services | 2019 |
| Payols Limited | Information & communication | 2017 |
| PB Plant Hire Limited | Administrative & support | 2018 |
| PC Maintenance Ltd | Other services | 2023 |
| Pcvape Ltd | Wholesale & retail | 2023 |
| PD Training Limited | Education | 2020 |
| Peach Personnel Services Limited | Administrative & support | 2002 |
| Pedalsure NO3 Ltd | Financial services | 2021 |
| Peeld Ltd | Administrative & support | 2020 |
| Penington Mews (CSP) Management Company Limited | Households | 2024 |
| Penn Court Management Limited | Real estate | 2002 |
| Penriver Design Limited | Wholesale & retail | 1991 |
| People Like US (UK) Limited | Wholesale & retail | 2009 |
| Peppermint Purple Ltd | Wholesale & retail | 2020 |
| Pequeta Ltd | Other services | 2018 |
| Perfect Buy Ltd | Wholesale & retail | 2017 |
| Perfect Property 1 Ltd | Real estate | 2025 |
| Perfect Property 2 Ltd | Real estate | 2025 |
| Perfect Property 3 Ltd | Real estate | 2025 |
| Perfect Property 4 Ltd | Real estate | 2025 |
| Perfect Property 5 Ltd | Real estate | 2025 |
| Perfect Property Developments Ltd | Construction | 2020 |
| Perfect Property RTM Company Limited | Real estate | 2025 |
| Perfect Stitches Ltd | Wholesale & retail | 2021 |
| Perfect Support Services Limited | Professional & scientific | 2007 |
| Perficio Limited | Information & communication | 2005 |
| Perform Air International - Europe Limited | Professional & scientific | 2020 |
| Permit Properties Ltd | Real estate | 2011 |
| Peter Buckley Scenery Ltd | Information & communication | 2015 |
| Peter LEE Props and Creations Limited | Arts & recreation | 2014 |
| Peter Russell Consulting Ltd | Administrative & support | 2021 |
| Petersham Estates Limited | Real estate | 2014 |
| Petroleum Consulting Limited | Professional & scientific | 1998 |
| Petrolheads Unleashed 110 Ltd | Professional & scientific | 2025 |
| Petty France Investment Nominees Limited | Professional & scientific | 1977 |
| Peybellen Ltd | Information & communication | 2026 |
| Pfmo Limited | Manufacturing | 2013 |
| Pgos Consultants Limited | Professional & scientific | 2015 |
| Phaedra Corrigan Limited | Professional & scientific | 2023 |
| Phalangium Trading Limited | Wholesale & retail | 2014 |
| Pharmacopola Limited | Health & social care | 2023 |
| Pheasant Close (Amersham) Management Company Limited | Households | 2018 |
| Phidaworld Ltd | Wholesale & retail | 2022 |
| Philanthropia Properties Limited | Real estate | 2017 |
| Philiz Exclusives Limited | Information & communication | 2020 |
| PHL (UK) Limited | Wholesale & retail | 2004 |
| Phoenix Hostels Limited | Hospitality | 2010 |
| Phoenix Rise Ltd | Health & social care | 2021 |
| Photo Farm Inc Ltd | Professional & scientific | 2002 |
| Pickled Tink Limited | Wholesale & retail | 2020 |
| Picture Creation Ltd | Information & communication | 2010 |
| Picture Frame Workshop Limited | Arts & recreation | 2021 |
| Pilates Gymnasium Limited | Arts & recreation | 2009 |
| Pincott LEE (Accountants) Ltd | Professional & scientific | 2014 |
| Pincott LEE (Partners) LLP | | 2011 |
| Pincott LEE (Tax) Ltd | Professional & scientific | 2011 |
| Pink 'N' Blue Ltd | Wholesale & retail | 2014 |
| Pink Moose Performance Limited | Professional & scientific | 2024 |
| Pink Panther Partners Ltd | Real estate | 2019 |
| Pinnacle Apartments (Northwood) Limited | Households | 2021 |
| Pintail Holdings Ltd | Financial services | 2020 |
| Pioneer Shipping Limited | Transport & logistics | 2015 |