| Patrick Brown Properties Ltd | Real estate | 2025 |
| Patron Hotels & Restaurants Limited | Hospitality | 2002 |
| Paul Gawman Events Ltd | Administrative & support | 2014 |
| Paul Turnham Kitchens Limited | Construction | 2010 |
| Paula Wood Design Ltd | Professional & scientific | 2019 |
| Pavilion Court Residents Limited | Households | 2009 |
| Pavilion Square Management Company (Apartments) Limited | Households | 2003 |
| Pavilion Square Management Company (Estate) Limited | Households | 2003 |
| Pavitra Assets Ltd | Real estate | 2022 |
| Pawel General Building Limited | Construction | 2007 |
| Pawlex Ltd | Professional & scientific | 2025 |
| Paxton Gardens (Forest Hill) Management Company Limited | Households | 1989 |
| Paxton House RTM Company Limited | Households | 2023 |
| Paxton Media Limited | Information & communication | 2024 |
| Paynter & Sons Ltd | Construction | 2025 |
| Paytyme Technologies Limited | Information & communication | 2021 |
| Pbjv Ltd | Real estate | 2020 |
| PBT and Associates Limited | Health & social care | 2022 |
| PC Holding Limited | Administrative & support | 2012 |
| Pchome Support Ltd | Wholesale & retail | 2020 |
| PCM (PRE Contract) Limited | Professional & scientific | 2020 |
| Pcvl Limited | Administrative & support | 2013 |
| Pcwa Ltd | Education | 2026 |
| PDH UK Trading Ltd | Wholesale & retail | 2022 |
| PDV Holdings Ltd | Financial services | 2019 |
| Peace Love and Life Ltd | Wholesale & retail | 2020 |
| Peach Publishing Limited | Professional & scientific | 1990 |
| Peacock Consultancy Ltd | Education | 2016 |
| Peacock F& W Ltd | Wholesale & retail | 2024 |
| Peacock Irrigation Ltd | Administrative & support | 2013 |
| Peakfire Ltd. | Wholesale & retail | 2018 |
| Peakstone Services Ltd | Administrative & support | 2017 |
| Peanut Butter & Bicycles Ltd | Health & social care | 2016 |
| Pearce Bros. Builders Limited | Construction | 1944 |
| Pearl Atlas Properties Ltd | Real estate | 2025 |
| Pearl Engineers Planners and Project Managers Ltd | Professional & scientific | 2023 |
| Pearl Residential Group Limited | Households | 2016 |
| Pearsmere Residents Association Limited | Households | 1981 |
| Peas Property Limited | Real estate | 2014 |
| Peba Limited | Administrative & support | 2003 |
| Pebbles Marine Ltd | Extraterritorial | 2024 |
| Pebview Holiday Rentals Ltd | Hospitality | 2019 |
| Pecavvi Consulting Limited | Other services | 2015 |
| Pedro's Properties Limited | Real estate | 2012 |
| PEE TEE International Limited | Wholesale & retail | 2013 |
| Peekapeds Ltd | Education | 2024 |
| Peekaplayers Ltd | Education | 2021 |
| Peera Properties Limited | Real estate | 2017 |
| Pegasus Domestic Appliance Repair Limited | Other services | 2014 |
| Pelas 1 Limited | Transport & logistics | 2021 |
| Pellings Close Residents Management Company Limited | Households | 2005 |
| Pellowe Consultancy Ltd | Information & communication | 2006 |
| Peltier Landlord Ltd | Real estate | 2018 |
| Pemberton House (London) RTM Company Limited | Real estate | 2024 |
| Pemberton House RTM Company Limited | Households | 2008 |
| Pembrom Properties Limited | Real estate | 2021 |
| Pencil Design Ltd | Construction | 2025 |
| Pendant Court (Chelsfield) Residents Association Limited | Households | 1983 |
| Pendaya Ltd | Hospitality | 2021 |
| Pendock Ltd | Real estate | 2013 |
| Pengaron Mediation Services Limited | Professional & scientific | 2008 |
| Pennant Shop Equipment Limited | Manufacturing | 1980 |
| Penrose House (Freehold) Limited | Households | 2000 |
| Pentedge Property Limited | Real estate | 2024 |
| People in Sync Ltd | Professional & scientific | 2019 |
| People Like US (London) Limited | Professional & scientific | 2010 |
| People's Forum Limited | Other services | 2014 |
| People's Republic of C+C Limited | Arts & recreation | 2012 |
| Peralto Limited | Wholesale & retail | 2019 |
| Perfect Colours Limited | Manufacturing | 1999 |
| Perfect Glitters Ltd | Administrative & support | 2025 |
| Perfect Law Ltd | Education | 2022 |
| Perfect Styles Ltd | Wholesale & retail | 2026 |
| Perfectly Pryced Homes Ltd | Real estate | 2025 |
| Performance Solutions International Ltd | Arts & recreation | 2015 |
| Performr Dance School Limited | Other services | 2024 |
| Peridot Design & Build Limited | Construction | 2015 |
| Perioss Ltd | Health & social care | 2025 |
| Peritus Management Limited | Professional & scientific | 2002 |
| Periwinkle Consulting Ltd | Information & communication | 2023 |
| Perkins Heating & Renewables Ltd | Construction | 2024 |
| Perpetual Verve Ltd | Professional & scientific | 2011 |
| Perpetuity Properties Limited | Construction | 2006 |
| Perrywood Management Company Limited | Professional & scientific | 1988 |
| Persa Limited | Manufacturing | 2017 |
| Person Centered Healthcare Ltd | Education | 2006 |
| Personio Properties Ltd | Real estate | 2024 |
| Perspicon Consulting Ltd | Information & communication | 2024 |
| Persson Property Investments Limited | Financial services | 2020 |
| Pervinco C.I.C. | Health & social care | 2024 |
| Perzayn Ltd | Administrative & support | 2017 |
| Pet-Nat Ltd | Extraterritorial | 2025 |
| Petalfinch Limited | Real estate | 1976 |
| Pete Black Limited | Arts & recreation | 2012 |
| Pete Mccormack Design Ltd | Professional & scientific | 2024 |
| Peter Daly Staircases Limited | Wholesale & retail | 2002 |
| Peter Investments Limited | Professional & scientific | 1978 |
| Peter Mcgrath Ltd | Other services | 2006 |
| Peter Morris Aviation Limited | Transport & logistics | 2012 |
| Peter Morris Property Limited | Hospitality | 2020 |