| People Champions Ltd | Administrative & support | 2023 |
| People WE Like Ltd | Professional & scientific | 2010 |
| Pepper 2025 Ltd | Professional & scientific | 2025 |
| Pepper Nail & Beauty Ltd | Other services | 2024 |
| Pepperjackmae Limited | Administrative & support | 2019 |
| Pera Cosmetics Ltd | Wholesale & retail | 2017 |
| Peracals Productions Limited | Information & communication | 2012 |
| Peregrine Real Estate Holdings Limited | Real estate | 2025 |
| Perfecto Ipswich Ltd | Hospitality | 2025 |
| Perform Partnership Limited | Professional & scientific | 2018 |
| Period Frames (London) Limited | Manufacturing | 2012 |
| Perron Consulting Limited | Professional & scientific | 2021 |
| Persian Land Ltd | Agriculture & fishing | 2023 |
| Pet Pet Limited | Wholesale & retail | 2021 |
| Petchum Ltd | Wholesale & retail | 2016 |
| Pete Coles Ltd | Arts & recreation | 2022 |
| Pete Cory Consulting Ltd | Professional & scientific | 2025 |
| Peterson Consultancy Ltd | Health & social care | 2023 |
| Petersons Property Investments Ltd | Real estate | 2022 |
| Petit Chinoiserie Ltd | Professional & scientific | 2021 |
| Petropoulos Engineering Services Limited | Construction | 2017 |
| Pets on Parade Ltd | Wholesale & retail | 2017 |
| PF Light Limited | Professional & scientific | 2025 |
| PFS Services Ltd | Construction | 2024 |
| PG Access Ltd | Construction | 2025 |
| PG Sports Consulting Ltd | Professional & scientific | 2022 |
| Pgo-Transport Ltd | Transport & logistics | 2018 |
| PGS Services Limited | Construction | 2005 |
| Phase Wire Electrical Limited | Construction | 2018 |
| Phil ADE Services Limited | Information & communication | 2013 |
| Philent Limited | Information & communication | 2013 |
| Philp House Futures Limited | Financial services | 2013 |
| Phins Ltd | Wholesale & retail | 2022 |
| Phoenix Court (New Malden) Management Company Limited | Households | 2003 |
| Phoenix Resources Ltd | Mining & quarrying | 2006 |
| Phone Names Limited | Other services | 2004 |
| Physio Blueprint Ltd | Health & social care | 2017 |
| Picasso Daniel Ltd | Construction | 2020 |
| Pickin Properties Ltd | Real estate | 2026 |
| Pickwick Contracts Limited | Construction | 1999 |
| Picnic Property Ltd | Real estate | 2019 |
| Pikaboo Ltd | Wholesale & retail | 2024 |
| Pilgrim PUB Company Ltd | Hospitality | 2019 |
| Pilsbury Consultants Limited | Professional & scientific | 2003 |
| Pimlico Hospitality Ltd | Real estate | 2026 |
| Pine Trees (Esher) Residents Association Limited | Households | 1985 |
| Pinegen Limited | Information & communication | 1989 |
| Pinegen Publishing Limited | Information & communication | 1992 |
| Pingu Care Limited | Health & social care | 2025 |
| Pioneer Finance 360 Limited | Financial services | 2020 |
| Piper Financial Ltd | Professional & scientific | 2019 |
| Pipps Beans Ltd | Hospitality | 2026 |
| Pixie Films Limited | Information & communication | 2005 |
| Pixode Ltd | Wholesale & retail | 2020 |
| Pizza Deliziosa Ltd | Hospitality | 2025 |
| Plan-It Vision Ltd | Professional & scientific | 2024 |
| Plane Crazy Trading Limited | Wholesale & retail | 2023 |
| Planet Build Ltd | Real estate | 2021 |
| Plant People Limited(The) | Wholesale & retail | 1981 |
| Platinum 1 Limited | Financial services | 2003 |
| Platinum Performance Ltd | Wholesale & retail | 2024 |
| Platinum Wholesaler Ltd | Wholesale & retail | 2025 |
| PLG Construction Limited | Construction | 2011 |
| PLUMB4U Heating and Plumbing Services Limited | Construction | 2011 |
| Plus Shopping Mart Ltd | Wholesale & retail | 2025 |
| Pluzz Ltd | Professional & scientific | 2026 |
| Plymouth Court Residents Association Limited | Households | 2002 |
| PM Direct Solutions Ltd | Information & communication | 2010 |
| PM Maintenance Limited | Manufacturing | 2025 |
| PMP Property Holdings Limited | Real estate | 2026 |
| Pmpc Ltd | Real estate | 2016 |
| PNR Homecare Ltd | Health & social care | 2025 |
| Podd Estate Limited | Real estate | 2015 |
| Pointless Software Limited | Information & communication | 2010 |
| Polynath Limited | Education | 2024 |
| Ponniah Ventures LLP | | 2024 |
| Poolpros Limited | Other services | 2013 |
| Popcorn Ventures Ltd | Information & communication | 2023 |
| Portal Removals of London Ltd | Transport & logistics | 2025 |
| Portentia UK Limited | Information & communication | 2017 |
| Porter and Haylett Limited | Manufacturing | 1958 |
| Porter James Ltd | Real estate | 2018 |
| Porton Court Residents Company Limited | Households | 1962 |
| Portsmouth House Property Limited | Real estate | 2025 |
| Portsmouth Road Apartments Limited | Real estate | 2025 |
| Portsmouth Tower Property Limited | Real estate | 2025 |
| Positano (2017) Ltd | Hospitality | 2017 |
| Positive Focus Limited | Administrative & support | 1998 |
| Posting Parrot Ltd | Administrative & support | 2024 |
| Postpartum Plan Ltd | Health & social care | 2021 |
| Power PA Ltd | Administrative & support | 2022 |
| Power Z Ltd | Professional & scientific | 2018 |
| PPP Solutions Limited | Financial services | 2002 |
| PR Property and Maintenance Ltd | Construction | 2022 |
| Pragma Technology and Consulting Ltd | Information & communication | 2016 |
| Prangleys Property Ltd | Real estate | 2023 |
| Precious Beauty Products Limited | Extraterritorial | 1987 |
| Precise Roofing Services Ltd | Construction | 2015 |
| Preethy Ltd | Hospitality | 2020 |
| Premedium Limited | Other services | 2014 |