| Parker Beaumont Ltd | Other services | 2017 |
| Parker Civil & Structural Engineering Services Ltd | Professional & scientific | 2020 |
| Parker Family Creations Limited | Hospitality | 2018 |
| Parker Francis Associates Ltd | Financial services | 2017 |
| Parker Global Ltd | Other services | 2023 |
| Parker Sellick Consultancy Limited | Other services | 2023 |
| Parkes Creations Ltd | Agriculture & fishing | 2021 |
| Parking MAD Ltd | Information & communication | 2020 |
| Parkinson Coaching Limited | Education | 2025 |
| Parkinson's Cars Limited | Wholesale & retail | 2018 |
| Parklife Campers Ltd | Administrative & support | 2020 |
| Parksmartsystems Ltd | Other services | 2024 |
| Parkway Construction (M.K.) Limited | Construction | 2003 |
| Parkwood Recruitment Ltd | Administrative & support | 2010 |
| Parliamentary Knowledge Schemes Ltd | Education | 2024 |
| Parmita Health Care Ltd | Health & social care | 2024 |
| Parnell Group Limited | Professional & scientific | 2012 |
| Parnell Place Residents Company Limited | Households | 1989 |
| Paro Dent Consulting Ltd | Professional & scientific | 2010 |
| Parrisstone Recovery Ltd | Transport & logistics | 2026 |
| Parrs Free Motion Rulers Ltd | Wholesale & retail | 2024 |
| Parsco International Limited | Mining & quarrying | 2003 |
| Parsloe Holdings Limited | Extraterritorial | 2012 |
| Parsons Heritage Consultancy Ltd | Professional & scientific | 2026 |
| Part X Direct Ltd | Wholesale & retail | 2024 |
| Partain Plant Hire Limited | | 1977 |
| Partake Services Limited | Extraterritorial | 1998 |
| Parth Capital Holdings Limited | Professional & scientific | 2022 |
| Parthenona Construction Limited | Construction | 2017 |
| Particular Investments Limited | Financial services | 2026 |
| Partner AI Limited | Information & communication | 2025 |
| Partner-D Accountants Ltd | Professional & scientific | 2022 |
| Partridge House Ltd | Extraterritorial | 2014 |
| Party Bundles UK Limited | Wholesale & retail | 2018 |
| Party Holidays Limited | Administrative & support | 2025 |
| Partytech Ltd | Wholesale & retail | 2013 |
| Parvana Strategic Sourcing Limited | Administrative & support | 2006 |
| Parveen Micro-Ink & Makeup Ltd | Other services | 2025 |
| Pasar Consultancy Limited | Professional & scientific | 2023 |
| Pasha and MAX Properties Limited | Real estate | 2025 |
| Paskrem Sols Ltd | Information & communication | 2023 |
| Pasricha Consulting Limited | Information & communication | 2007 |
| Pasricha Properties Limited | Real estate | 2018 |
| Passiflora Limited | Wholesale & retail | 2015 |
| Passingham Jones Ltd | Information & communication | 2008 |
| Passion for Cooking Ltd | Hospitality | 2018 |
| Passion for Performance Ltd | Professional & scientific | 2018 |
| Pasture of Hope CIC | Health & social care | 2025 |
| PAT Gardt Limited | Health & social care | 2020 |
| Patagonia Property Ltd | Real estate | 2025 |
| Patel Chat Chaska Ltd | Hospitality | 2024 |
| Patel Developers Ltd | Real estate | 2024 |
| Patel Foods & Groceries Ltd | Other services | 2017 |
| Patel Supermart Ltd | Wholesale & retail | 2024 |
| Patel Sweets and Savouries Ltd | Hospitality | 2025 |
| Patel Sweets Limited | Wholesale & retail | 2025 |
| Path 2 Hope CIC | Professional & scientific | 2025 |
| Path to Umrah Ltd | Administrative & support | 2026 |
| Pathlines Group Services UK Limited | Administrative & support | 2009 |
| Pathlines Holdings Limited | Financial services | 2023 |
| Pathlines Pensions UK Limited | Financial services | 1994 |
| Pathmaker DEV Ltd | Information & communication | 2022 |
| Pathology Quality Control Limited | Professional & scientific | 2025 |
| Patience Consultancy Limited | Professional & scientific | 2020 |
| Patience Sackey Taxi Ltd | Transport & logistics | 2026 |
| Patientbridge Health Ltd | Professional & scientific | 2026 |
| Patientstay Limited | Professional & scientific | 2014 |
| Patisol Consulting Limited | Information & communication | 2014 |
| Patob Consulting Limited | Administrative & support | 2017 |
| Patoba Limited | Health & social care | 2019 |
| Paton Estates Limited | Financial services | 1987 |
| Patrick Abelino Wilson Ltd | Wholesale & retail | 2021 |
| Patrick Alexander Holdings Ltd | Construction | 2024 |
| Patrick Alexander Ltd | Administrative & support | 2014 |
| Patrick King Film and Television Services Limited | Information & communication | 2013 |
| PATRICK2017 Limited | Transport & logistics | 2020 |
| Patron Safety Ltd | Professional & scientific | 2023 |
| Patrut Services Ltd | Transport & logistics | 2016 |
| Pattern One Limited | Manufacturing | 2007 |
| Patterson-Mills Corporate Services Ltd | Financial services | 2001 |
| Patterson-Mills Financial Planning Limited | Financial services | 2017 |
| Pattigift Therapy C.I.C. | Health & social care | 2008 |
| Pattison Engineering Limited | Manufacturing | 2014 |
| Paul & Jane Limited | Financial services | 2012 |
| Paul Brian Watson Ltd | Other services | 2021 |
| Paul Carpentry Ltd | Construction | 2016 |
| Paul Cottrell Services Limited | Construction | 2007 |
| Paul EKA Properties Ltd | Real estate | 2021 |
| Paul Newman Construction Limited | Administrative & support | 2004 |
| Paul Newman Contracting Limited | Administrative & support | 2004 |
| Paul Newman Developments Limited | Administrative & support | 2004 |
| Paul Newman Homes Limited | Administrative & support | 2004 |
| Paul Newman New Homes Limited | Administrative & support | 2004 |
| Paul Okeefe Design Ltd | Administrative & support | 2022 |
| Paul Riches Skips Limited | Water & waste | 1998 |
| Paul Snotra Transport Ltd | Transport & logistics | 2022 |
| Paul's Catering Butchers Limited | Wholesale & retail | 2002 |
| Paula Smith PR Communications Limited | Professional & scientific | 2025 |
| Pauley Design Limited | Professional & scientific | 1998 |
| Pauley Group Limited | Professional & scientific | 2003 |