| PCS Workforce Solutions Limited | Professional & scientific | 2025 |
| PDD Associates Ltd | Financial services | 2014 |
| PDY DRY Lining Ltd | Construction | 2023 |
| Peaccce Technology Ltd | Information & communication | 2018 |
| Peace by Piece Organising Ltd | Administrative & support | 2026 |
| Peach & FOX Limited | Wholesale & retail | 2026 |
| Peacock Data Services Limited | Information & communication | 2024 |
| Peak Sales Performance Ltd | Professional & scientific | 2026 |
| Peanut Industries Ltd | Financial services | 2026 |
| Pearce Bennett Ltd | Manufacturing | 2006 |
| Pearce Building Surveying and Consultancy Limited | Professional & scientific | 2003 |
| Pearce Construction Group Limited | Construction | 2022 |
| Pearl Impex UK Ltd | Wholesale & retail | 2025 |
| Pearl Spot Limited | Hospitality | 2017 |
| Pebble and Rock Therapy Ltd | Health & social care | 2024 |
| Pebble Homes and Lettings Ltd | Real estate | 2025 |
| Pecan Fries Ltd | Information & communication | 2023 |
| Peden Professional Services Ltd | Professional & scientific | 2026 |
| Pedl Services Limited | Professional & scientific | 2019 |
| Peekaview Ventures Ltd | Wholesale & retail | 2024 |
| PEG LEG Films Limited | Information & communication | 2011 |
| Pegasus Accountants and Business Advisors Limited | Professional & scientific | 2023 |
| Pegasus Capital Bidco Limited | Financial services | 2022 |
| Pegasus Furnitures Limited | Wholesale & retail | 2025 |
| Pegasus Powered Access Limited | Administrative & support | 2009 |
| Pegasus Private Capital LLP | | 2014 |
| Pegasus Trains Limited | Administrative & support | 1997 |
| Pegrow Limited | Professional & scientific | 2023 |
| Peking House High Wycombe Ltd | Hospitality | 2026 |
| Pelham Principal Holdings Limited | Professional & scientific | 2014 |
| Pembroke Capital Investments Ltd | Financial services | 2026 |
| Pemjon Property Ltd | Real estate | 2025 |
| PEN Ithon Estate Limited | Real estate | 1945 |
| Penallta Partnerships Limited | Construction | 2023 |
| Pender Brown Ltd | Construction | 2025 |
| Pendower International Limited | Wholesale & retail | 1998 |
| Penfold Property Ltd | Real estate | 2021 |
| Penley Consultancy Services Ltd | Information & communication | 2015 |
| Penmoorent Group Holdings Limited | Real estate | 2016 |
| Penn & Tylers Green Residents Society | Other services | 2003 |
| Penn Garden Maintenance Ltd | Administrative & support | 2021 |
| Penn Garden Rooms Ltd | Construction | 2020 |
| Penn HR Tech Limited | Information & communication | 2023 |
| Penn Legal Consulting Limited | Professional & scientific | 2017 |
| Penn Meadow Farm Limited | Hospitality | 2026 |
| Penn Motor Co Ltd | Wholesale & retail | 2012 |
| Penn Porcelain Limited | Wholesale & retail | 2025 |
| Penn Rental Service Limited | Wholesale & retail | 1974 |
| Penn Retail Limited | Wholesale & retail | 2010 |
| Penncroft Ltd | Real estate | 2024 |
| Penngate Limited | Information & communication | 2017 |
| Pennvale (Holdings) Ltd | Real estate | 2017 |
| Pentagon Motor Holdings Limited | Extraterritorial | 2006 |
| Pepc Ltd | Professional & scientific | 2019 |
| Peppard Consulting Ltd | Information & communication | 2015 |
| Pepple Group Ltd | Information & communication | 2023 |
| Perfect Choice Soundsystem Ltd | Transport & logistics | 2026 |
| Perfect Form Training Limited | Arts & recreation | 2002 |
| Performance Hockey Limited | Wholesale & retail | 2019 |
| Performance Multiplied Ltd | Professional & scientific | 2026 |
| Peri Grill House Ltd | Hospitality | 2022 |
| Peri Peri Chicken Delight High Wycombe Limited | Administrative & support | 2018 |
| Pering & Allen Estate Agents Ltd | Real estate | 2023 |
| Period Entry Ltd | Information & communication | 2020 |
| Perkinelmer (UK) Limited | Professional & scientific | 2022 |
| Perkinelmer (UK) Private Limited | Financial services | 2022 |
| Perkinelmer AES (UK) Limited | Professional & scientific | 2022 |
| Permaflex Ltd | Construction | 2018 |
| Perpetual Wine Consultancy Limited | Other services | 2024 |
| Perrydental VET Ltd | Professional & scientific | 2010 |
| Perrymac Ltd | Professional & scientific | 2011 |
| Perrys Builders Merchants Limited | Wholesale & retail | 2000 |
| Perse Ltd | Professional & scientific | 2023 |
| Personal Strategic Planning Limited | Professional & scientific | 2025 |
| Pet and Gear Limited | Wholesale & retail | 2026 |
| Pet Plas Packaging Limited | Manufacturing | 1990 |
| Petal Crafts Ltd | Manufacturing | 2021 |
| Pete the Plumber Ltd | Construction | 2020 |
| Peteb Consultancy Ltd | Administrative & support | 2019 |
| Peter Latham Associates Limited | Professional & scientific | 2018 |
| Petrolvalves (G.B.) Limited | Manufacturing | 1984 |
| PG Engineering Consultants Ltd | Professional & scientific | 2025 |
| Pgab Limited | Real estate | 2025 |
| PGB Motorcycles Limited | Wholesale & retail | 2011 |
| PGD Network Services Limited | Professional & scientific | 2016 |
| Pgdo Ventures Limited | Professional & scientific | 2024 |
| PGK Group Limited | Wholesale & retail | 2024 |
| PGT Properties Ltd | Real estate | 2015 |
| PH Retreats Ltd | Administrative & support | 2015 |
| Phani SRI Business and IT Solutions Limited | Information & communication | 2012 |
| Phantom Apex Autos Limited | Wholesale & retail | 2026 |
| Pharma Express Limited | Extraterritorial | 2012 |
| Pharma Insight Services Ltd | Professional & scientific | 2024 |
| Pharma Promoted Solutions Limited | Health & social care | 2008 |
| Pharmazon Limited | Wholesale & retail | 2018 |
| Pharmsayub Ltd | Professional & scientific | 2021 |
| Phase Electrical (GS) Ltd | Construction | 2021 |
| Pheonix Healthcare Ltd | Health & social care | 2016 |
| Phhm Ltd | Information & communication | 2024 |
| Phil Bradshaw Films Ltd. | Information & communication | 1993 |