| Overdale Property Ltd | Real estate | 2024 |
| Overland Spares Limited | Wholesale & retail | 1977 |
| P & D Shipping Limited | Transport & logistics | 2002 |
| P J Spillings (Joinery) Limited | Manufacturing | 2000 |
| P. & F. Safepac Co. Limited | Other services | 1966 |
| P.H. Betts (Holdings) Limited | Financial services | 1974 |
| P.H.Carter & SON | | 1990 |
| PAC Vending Ltd | Wholesale & retail | 2023 |
| Padel Vibes Ltd | Wholesale & retail | 2023 |
| Pakefield Street Motors Limited | Wholesale & retail | 2004 |
| Palace Ebes Brand Administration Limited | Manufacturing | 2022 |
| Paldriftdesigns Ltd | Wholesale & retail | 2026 |
| Pandanus Resources Limited | Information & communication | 2003 |
| Panicflaneur Ltd | Manufacturing | 2025 |
| Parachute Ltd | Wholesale & retail | 2021 |
| Parburch Medical Developments Limited | Wholesale & retail | 1984 |
| Parkers Holdings Ltd | Financial services | 2024 |
| Parkview Ipswich Ltd | Health & social care | 2025 |
| Partify Ltd | Wholesale & retail | 2023 |
| Passion Education Ltd. | Education | 2023 |
| Passport Pals Limited | Administrative & support | 2024 |
| Patrick Hockley and Company Limited | | 1986 |
| Paul Evans (Design) Associates Limited | Professional & scientific | 1985 |
| Paul Smith (Spraybooth Support) Limited | Manufacturing | 2001 |
| Paul Wright & Co. Limited | Real estate | 1965 |
| Pauls Malt Limited | Manufacturing | 1906 |
| Pawbloomlamps Ltd | Wholesale & retail | 2025 |
| Pawflarelamps Ltd | Wholesale & retail | 2025 |
| Payful Limited | Information & communication | 2021 |
| Paymodum Holding Limited | Financial services | 2023 |
| PC Wakeup Limited | Other services | 2007 |
| PD Models Ltd | Professional & scientific | 2023 |
| Pearland Power Contracting Limited | Wholesale & retail | 1965 |
| Pearse Management Ltd | Households | 1990 |
| Pedagogic Enterprises Ltd | Education | 2023 |
| Perry Media and Development Ltd | Information & communication | 2020 |
| Persepolis Group Limited | Professional & scientific | 2024 |
| Perspectives Counselling Limited | Other services | 2024 |
| Petalglow Designs Ltd | Wholesale & retail | 2025 |
| Peter Grubb Ltd | Wholesale & retail | 2000 |
| Peter Stevens Design LLP | | 2011 |
| Petitsquares Ltd | Manufacturing | 2021 |
| Pevex Enterprises Limited | Wholesale & retail | 2003 |
| Phenix Holdings Limited | Financial services | 2018 |
| Phil Marshall Motors Limited | Wholesale & retail | 2002 |
| Phonograph Digital Ltd | Information & communication | 2018 |
| Pianddr Limited | Administrative & support | 2004 |
| PIB Properties Limited | Real estate | 2022 |
| Pickle and Bear Ltd | Wholesale & retail | 2024 |
| Pierre Van Buck Limited | Professional & scientific | 1983 |
| Pilcs Group Ltd | Financial services | 2023 |
| Pinepanel Limited | Manufacturing | 2007 |
| Pinion Higgins Ltd | Health & social care | 2026 |
| Pink Lane Vintage Ltd | Wholesale & retail | 2019 |
| Pinkymoor Ltd | Wholesale & retail | 2025 |
| Pintail Design Limited | Hospitality | 2002 |
| Pioty Ltd | Information & communication | 2020 |
| Pivex Group Ltd | Administrative & support | 2023 |
| Pixcape Ltd | Wholesale & retail | 2026 |
| Pizza Piatto Limited | Hospitality | 2011 |
| Plane Luxuries Limited | Wholesale & retail | 2011 |
| Plash Speed Ltd | Construction | 2024 |
| Plastics for Games Limited | Manufacturing | 1988 |
| Platinum Holdings and Investments Ltd | Financial services | 2022 |
| Platinum Worldwide Properties Ltd | Real estate | 2021 |
| Play and Learn Before and After School Club Limited | Health & social care | 2005 |
| Playtime Toys Ltd | Wholesale & retail | 2020 |
| PLB Creative Limited | Arts & recreation | 2026 |
| Plio X Ltd | Wholesale & retail | 2023 |
| Plumb Mate Limited | Construction | 2006 |
| Plushcourt Estates Limited | Professional & scientific | 2002 |
| Pmcde Limited | Professional & scientific | 2005 |
| Point of Sale Ltd | Professional & scientific | 2019 |
| Portman Enterprises Limited | Financial services | 2015 |
| Powerclean Chemicals Limited | Manufacturing | 1988 |
| PPG Central (UK) Limited | Administrative & support | 2008 |
| PPG Holdings (U.K.) Limited | Professional & scientific | 1987 |
| PPG Industries (UK) Limited | Manufacturing | 1987 |
| PPG Industries (UK) Pension Trustee Limited | Financial services | 1996 |
| PPG Investment UK 1 Limited | Financial services | 2024 |
| PPG Investment UK 2 Limited | Financial services | 2024 |
| PPG Kansai Automotive Finishes UK LLP | | 2004 |
| PPG Refinish Distribution Limited | Manufacturing | 1979 |
| Premier Loft Ladders Limited | Construction | 2003 |
| Premier Realty Group Ltd | Real estate | 2026 |
| Presage Limited | Information & communication | 2004 |
| Preston Court (Holland-On-Sea) Limited | Households | 2000 |
| Prestwood Limited | Information & communication | 1996 |
| PRH Holidays Ltd | Administrative & support | 2024 |
| Pridamach Limited | Construction | 2006 |
| Primaxia Limited | Information & communication | 2001 |
| Prime Drive Services Ltd | Wholesale & retail | 2022 |
| Prime Haven Ventures Ltd | Construction | 2025 |
| Prime Network Ltd | Transport & logistics | 2026 |
| Prime Support Solutions Ltd | Health & social care | 2023 |
| Prime Trade London Ltd | Wholesale & retail | 2017 |
| Primepath Property Limited | Real estate | 2023 |
| Primera Insurance Services Limited | Extraterritorial | 1986 |
| Priory Hall Limited | Agriculture & fishing | 1998 |
| Priory Park Estate Ltd | Real estate | 2016 |