| Pbkl Group Limited | Financial services | 2025 |
| PD Wooden Stories Limited | Manufacturing | 2026 |
| PDK Engineering Developments (Leighton Buzzard) Limited | | 1981 |
| PDM (Project Development Management) Service Limited | Construction | 2017 |
| Peachford Ltd | Professional & scientific | 2015 |
| Peacock & Juno Limited | Hospitality | 2016 |
| Peak Elevation Ltd | Information & communication | 2023 |
| Peak Focus Ltd | Professional & scientific | 2011 |
| Peak Performance Studio Ltd | Arts & recreation | 2025 |
| Pear Construction Ltd | Construction | 2023 |
| Pearce Design Consultants Limited | Professional & scientific | 1997 |
| Pebblerose Wealth Limited | Financial services | 2024 |
| Peck & Sons Limited | Agriculture & fishing | 2023 |
| Peli Biothermal Limited | Administrative & support | 2013 |
| Pelias Limited | Professional & scientific | 2008 |
| Penguinenest Limited | Information & communication | 2024 |
| Pennings Group Limited | Wholesale & retail | 2025 |
| Pentwyn Property Management Limited | Real estate | 2005 |
| People and Places Insight Limited | Professional & scientific | 2016 |
| People Pulse Ltd | Professional & scientific | 2014 |
| Peoplecorp Limited | Professional & scientific | 2007 |
| Performance Storage Systems Limited | Manufacturing | 2009 |
| Periphery Limited | Financial services | 2022 |
| Perpetual House Residents Management Company Limited | Households | 2009 |
| Perrin & Nissen International Limited | Manufacturing | 1998 |
| Perry Goyen Limited | Other services | 2014 |
| Personaltouch Ltd | Wholesale & retail | 2025 |
| Peter Alan Black Limited | Real estate | 2010 |
| Peter Alan Limited | Real estate | 1986 |
| Peter Andrew Rentals Limited | Real estate | 2023 |
| Peter Baxter Consulting Limited | Information & communication | 2013 |
| Peter Bellingham Ltd | Transport & logistics | 2020 |
| Peter Bellingham Specialist Services Limited | Transport & logistics | 2011 |
| Peter Rustic House Ltd | Agriculture & fishing | 2019 |
| Peter Sutton & Sons Electrical Contractors Limited | Construction | 2015 |
| Petit Paws Limited | Agriculture & fishing | 2023 |
| PG Electrical Maintenance Ltd | Construction | 2018 |
| Pharma Quality Professionals Ltd | Professional & scientific | 2014 |
| Pharmaceutical Management Intelligence Associates Limited | Professional & scientific | 2000 |
| Pharmaceutical Management Intelligence Limited | Information & communication | 1998 |
| Pharmahub Ltd | Professional & scientific | 2022 |
| Phil C Driving Limited | Transport & logistics | 2016 |
| Phil Lanzon Limited | Arts & recreation | 2025 |
| Phil Parry Associates Ltd | Professional & scientific | 2010 |
| Phil the Bowser Limited | Transport & logistics | 2017 |
| Phil the Farrier Ltd | Arts & recreation | 2010 |
| Phillips Global Mechanics Ltd | Professional & scientific | 2019 |
| Phillips Pest Control Limited | Administrative & support | 2013 |
| Philm Carz Limited | Administrative & support | 2022 |
| Phoenix Park (Dunstable) Residents Management Company Limited | Households | 2016 |
| Phone Repair Center Ltd | Wholesale & retail | 2022 |
| Photolysys Limited | Information & communication | 2023 |
| Photon Fabrication Ltd | Manufacturing | 2021 |
| Physiyoga Designs Ltd | Wholesale & retail | 2015 |
| Pickup Enterprises Ltd | Financial services | 2025 |
| Pier Solutions Limited | Information & communication | 2009 |
| Piggyback Transport Ltd | Transport & logistics | 2021 |
| Pilling Motor Group Limited | Wholesale & retail | 1970 |
| PIN Sharp Music Limited | Arts & recreation | 2009 |
| Pink Peony Weddings Ltd | Professional & scientific | 2018 |
| Pinpoint Ledgers Limited | Professional & scientific | 2024 |
| Pippa's Gardens Ltd | Administrative & support | 2022 |
| Pirlanta Ltd | Hospitality | 2022 |
| Pirum Ltd | Professional & scientific | 2022 |
| Pitch Design & Advertising Limited | Extraterritorial | 2004 |
| Pitch Interactive Limited | Extraterritorial | 2004 |
| Pivot Web Design Ltd | Information & communication | 2019 |
| Pixel Bakery Limited | Information & communication | 2018 |
| Pixel Playground 88 Limited | Information & communication | 2024 |
| Pixelex Aspect (UK) Limited | Transport & logistics | 2011 |
| PKM Property Company Ltd. | Professional & scientific | 2020 |
| PKW Accountants Limited | Professional & scientific | 2026 |
| Placona Holdings Ltd | Financial services | 2026 |
| Planets Construction Limited | Construction | 2021 |
| Plantation 70 Ltd | Professional & scientific | 2021 |
| Plantmantom Ltd | Administrative & support | 2024 |
| Platinum Bell Ltd | Construction | 2023 |
| Platinum Landscapes (Buckinghamshire) Ltd | Administrative & support | 2025 |
| Play Innovation Digital Ltd | Arts & recreation | 2023 |
| Playstyle Limited | Wholesale & retail | 2017 |
| Pledge Office Chairs Limited | Manufacturing | 1970 |
| Pledge Office Equipment International Limited | Manufacturing | 1977 |
| Pledge Office Holdings Limited | Financial services | 2025 |
| PLF Partners Limited | Information & communication | 2015 |
| PLM Roofing Ltd | Construction | 2021 |
| Plug 365 Ltd | Other services | 2024 |
| Plumb Drain and Maintain Ltd | Water & waste | 2013 |
| Plumbing Solutions Bedfordshire Ltd | Construction | 2023 |
| Plummer & Sons (Asphalte) Limited | Wholesale & retail | 1980 |
| Pmad Services Ltd | Administrative & support | 2017 |
| PNL Services Ltd | Construction | 2015 |
| Podd Ltd | Real estate | 2022 |
| Poets Chase Freehold Company Limited | Households | 2004 |
| Poets Chase Management Co. Limited | Households | 1987 |
| Point Blank Adventures Ltd | Education | 2018 |
| Politely Dramatic Ltd | Wholesale & retail | 2026 |
| Polybiodata Ltd | Information & communication | 2025 |
| Porter Glenny Limited | Real estate | 1995 |
| Porter Glenny New Homes Limited | Extraterritorial | 2009 |
| Portsmouth Chiropractic Limited | Health & social care | 2024 |