| Paktel Ltd | Construction | 1988 |
| Palazzo Investments Limited | Construction | 2000 |
| Palms and Peacocks Limited | Public administration | 2014 |
| Pandora Construct Ltd | Construction | 2016 |
| Paragon Motor Company Limited | Wholesale & retail | 2000 |
| Park Farm Snettisham Limited | Financial services | 2023 |
| Park Farm Tourism Limited | Hospitality | 2022 |
| Park Lane Associates Limited | Transport & logistics | 2020 |
| Park Lane Cosmetics Ltd | Other services | 2024 |
| Park Lane Ventures Ltd | Financial services | 2022 |
| Parker and Sons Haulage Limited | Transport & logistics | 2022 |
| Parkers of Wisbech Ltd | Transport & logistics | 2010 |
| Parson Drove Convenience Store Ltd | Wholesale & retail | 2020 |
| Parson Drove Developments Limited | Extraterritorial | 2017 |
| Parson Drove Spice HUT Limited | Hospitality | 2025 |
| Parson Drove Takeaway Ltd | Hospitality | 2023 |
| Parson Store Ltd | Wholesale & retail | 2024 |
| Partybox Retail Ltd | Wholesale & retail | 2016 |
| Partybox Wholesale Ltd | Wholesale & retail | 2015 |
| PAS Zemaiti Limited | Wholesale & retail | 2012 |
| Patey Consulting Ltd | Professional & scientific | 2018 |
| Patricks of Parson Drove Limited | Construction | 2001 |
| Paul Griffin 1412 Limited | Construction | 2020 |
| Paul Gude Limited | Construction | 2015 |
| Paul Nickerson Limited | Wholesale & retail | 2004 |
| Paul Tibbs Limited | Construction | 2000 |
| Pawel Wawrzkiewicz Transport Ltd. | Administrative & support | 2014 |
| PD Slean Consultancy Limited | Construction | 2014 |
| PDF Training Ltd | Transport & logistics | 2018 |
| Peggs Construction Limited | Construction | 2005 |
| Pellucid Ltd | Financial services | 2010 |
| PEN 1 Limited | Real estate | 2021 |
| Penthurst Ltd | Professional & scientific | 2017 |
| Pentney Lakes Fishery Ltd | Agriculture & fishing | 2023 |
| People & Animals UK Community Interest Company | Other services | 2015 |
| Peperomi Group Ltd | Hospitality | 2025 |
| Perdix Property Investments Ltd | Construction | 2023 |
| Perennial-Sphere Ltd | Administrative & support | 2023 |
| Peritum Wills Limited | Professional & scientific | 2024 |
| Pernix Group Limited | Wholesale & retail | 2022 |
| Perspective UAV Limited | Professional & scientific | 2019 |
| Pete's GOT Wood Ltd | Manufacturing | 2024 |
| Peter Barnes Funerals (Vehicle Hire) Limited | Administrative & support | 2015 |
| Peter Barnes Funerals Limited | Other services | 2014 |
| Peter Humphrey Associates Limited | Professional & scientific | 2002 |
| Peter J Ward Nurseryman Ltd | Wholesale & retail | 2012 |
| Peterborough Plating Company Limited | Manufacturing | 1977 |
| Peterborough Plating Holdings Limited | Financial services | 2026 |
| Peterborough Skills Limited | Education | 2015 |
| Petrosiute Ltd | Agriculture & fishing | 2025 |
| Petx Limited | Professional & scientific | 2026 |
| PFW Traffic Solutions Limited | Construction | 2019 |
| PH Land Consultants Limited | Professional & scientific | 2023 |
| PHA Holdings Limited | Financial services | 2025 |
| Pheonix Contracting Limited | Manufacturing | 2021 |
| Philip Wagg Carpenter Builder Limited | Construction | 2005 |
| Philip Williams Contractor Limited | Other services | 2024 |
| Phoenix Estate Agents (East) Limited | Real estate | 2009 |
| Phoenix Motor Engineers Ltd | Wholesale & retail | 2023 |
| Phoenix Services & Maintenance Limited | Administrative & support | 2024 |
| Phoenix Services (PGH) Ltd | Professional & scientific | 2026 |
| Phoenix Trustees Ltd | Other services | 2014 |
| Photinia Properties Ltd | Real estate | 2025 |
| Pictopictures Limited | Information & communication | 2014 |
| Pike Textile Display Limited | Manufacturing | 1937 |
| Pike Textiles Limited | Extraterritorial | 2016 |
| Pine Bay Limited | Wholesale & retail | 2023 |
| Pineway Trading Limited | Administrative & support | 2007 |
| Pinewood Decorators Ltd | Construction | 2022 |
| Pinewood Maintenance London Ltd | Manufacturing | 2024 |
| Pinnacle Boxing Club Limited | Arts & recreation | 2024 |
| Pioneer Finance Group Limited | Financial services | 2022 |
| Pioneer Produce Limited | Wholesale & retail | 2017 |
| Pioneering Pest Control Limited | Agriculture & fishing | 2022 |
| Pipeco Water Tanks Ltd | Wholesale & retail | 2026 |
| Pipeline Constructors Limited | Construction | 2024 |
| Pitcher Estates Limited | Construction | 2020 |
| Pixelnesto Ltd | Information & communication | 2025 |
| PJ Industrial Clothing Limited | Wholesale & retail | 2024 |
| Plah Four Limited | Financial services | 2014 |
| Planet Green Foliage Ltd | Wholesale & retail | 2019 |
| PLAY2DAY Nurseries Limited | Health & social care | 2019 |
| Playmaintain Limited | Manufacturing | 2015 |
| PLM Norfolk Properties Limited | Construction | 2018 |
| Plough & Harrow (Littleport) Ltd | Hospitality | 2016 |
| Plumbs Properties Limited | Real estate | 2021 |
| Plumridge Nurseries LLP | | 2018 |
| PO (2011) Limited | Professional & scientific | 2011 |
| Pomerium Entertainment Ltd | Hospitality | 2024 |
| POP Jack Properties Ltd | Construction | 2018 |
| POP Jack Property Management Ltd | Real estate | 2020 |
| Pope Homes Limited | Real estate | 2023 |
| Poplar Fields Limited | Households | 2019 |
| Poplar Nurseries (Wholesale) Ltd | Agriculture & fishing | 2005 |
| Poppy Mews (Wisbech) Management Company Limited | Extraterritorial | 2015 |
| Poppyfield Bulbs Ltd | Extraterritorial | 2021 |
| Portham Recruitment Ltd | Administrative & support | 2024 |
| Posher Paws Grooming Academy Limited | Education | 2023 |
| Posher Paws Ltd | Other services | 2020 |
| Power Network Solutions UK Limited | Manufacturing | 2023 |