| Pilgrim Motors Limited | Wholesale & retail | 2021 |
| Pilot Fish Broker Limited | Financial services | 2015 |
| Pilot Fish Commercial Finance Limited | Financial services | 2025 |
| Pilot Fish Services Limited | Professional & scientific | 2014 |
| Pims Energy Holdings Limited | Professional & scientific | 2021 |
| Pims Energy Limited | Construction | 2021 |
| Pims Group Holdings Limited | Financial services | 2021 |
| Pinakinit Ltd | Real estate | 2023 |
| Pinchbeck Stores Limited | Wholesale & retail | 2022 |
| Pine Grove Investments Limited | Construction | 1976 |
| Pinelli Global Ambassadors Limited | Real estate | 2022 |
| Pinelli Property Management Limited | Real estate | 2020 |
| Pinellienergia (SRL) Limited | Professional & scientific | 2022 |
| Pink & White Limited | Other services | 2005 |
| Pink Chameleon Limited | Financial services | 2026 |
| Pink Giraffe Properties Ltd | Real estate | 2025 |
| Pink House Arts CIC | Arts & recreation | 2018 |
| Pink Palm Properties Ltd | Real estate | 2019 |
| Pink Polish Ltd | Other services | 2023 |
| Pink Rocket Consultancy Ltd | Information & communication | 2019 |
| Pinkys Nails Ltd | Other services | 2022 |
| Pinnacle Consultancy Limited | Financial services | 2009 |
| Pinnacle Health Nutrition Limited | Wholesale & retail | 2017 |
| Pinnacle Platforms Limited | Wholesale & retail | 2020 |
| Pinwheel International CIC | Administrative & support | 2020 |
| Pinwill Music Ltd | Information & communication | 2022 |
| Pioneer Asbestos Removal Limited | Construction | 2021 |
| Pioneer Demolition Limited | Construction | 2014 |
| Pioneer Doors Limited | Construction | 2018 |
| Piotr Buildings Services Limited | Construction | 2020 |
| Piotr Kolakowski Limited | Wholesale & retail | 2014 |
| Piotr Services Limited | Other services | 2021 |
| Piotr Sztrajt Transport Ltd | Transport & logistics | 2022 |
| Pipe Wizards Ltd | Construction | 2023 |
| Pipeline Creative Media Limited | Information & communication | 2004 |
| Piper Kennett Limited | Professional & scientific | 2022 |
| Piper Physiotherapy Limited | Health & social care | 2006 |
| Piphealth Ltd | Health & social care | 2022 |
| Pippa MAY Ltd | Other services | 2014 |
| Pippard Construction Limited | Construction | 2007 |
| Pireneus Ltd | Wholesale & retail | 2020 |
| Pires Logistics Ltd | Transport & logistics | 2025 |
| Pirmo Construction Ltd | Construction | 2022 |
| Pirmo Developments Ltd | Construction | 2022 |
| Pirmo Enterprises Limited | Real estate | 2007 |
| Pirrie Park Ltd | Construction | 2015 |
| PIT Services Limited | Professional & scientific | 2023 |
| Pita-Pita GSF Ltd | Hospitality | 2019 |
| Pitek Metal Limited | Wholesale & retail | 2019 |
| Pitsikas Contractors Ltd | Construction | 2026 |
| Piwek CON +(UK) LLP | | 2025 |
| Piwek CON Ltd | Manufacturing | 2022 |
| Pixley Solutions Limited | Health & social care | 2011 |
| Pizza Byte Limited | Wholesale & retail | 2000 |
| Pizza H Investments Ltd | Hospitality | 2024 |
| Pizza Milano (Lincs) Ltd | Wholesale & retail | 2019 |
| Pizza Pasta Limited | Hospitality | 2019 |
| Pizza Pitta Ltd | Hospitality | 2024 |
| Pizza Roua Limited | Hospitality | 2025 |
| Pizza Santino Peterborough Ltd | Hospitality | 2025 |
| Pizzanini Peterborough Ltd | Hospitality | 2023 |
| Pizzaz Limited | Wholesale & retail | 2001 |
| PJ & Pauly Ltd | Construction | 2025 |
| PJ Print (East Anglia) Ltd | Manufacturing | 2012 |
| PJC Building Services Ltd | Construction | 2025 |
| PJD Building Contractors Ltd | Construction | 2021 |
| PJI Baking Solutions Limited | Extraterritorial | 2024 |
| Pjmw Media Limited | Information & communication | 2022 |
| PJP Brokerage Services Ltd | Wholesale & retail | 2005 |
| PJS Poole Investments Limited | Construction | 2020 |
| PK Clifton Services Ltd | Professional & scientific | 2021 |
| PK Fast Trans Ltd | Transport & logistics | 2018 |
| PK Global Exports Ltd | Wholesale & retail | 2025 |
| PK Pro Building Ltd | Construction | 2023 |
| PK Woodwork Ltd | Manufacturing | 2021 |
| PK2 Builders Ltd | Construction | 2025 |
| Pkai Limited | Other services | 2002 |
| Pkat Trading | Education | 2018 |
| PKB Trade Limited | Manufacturing | 2018 |
| PKF Property Limited | Real estate | 2025 |
| Pkvk Limited | Information & communication | 2010 |
| PKZ Holding Limited | Financial services | 2026 |
| PKZ Management Limited | Real estate | 2026 |
| PKZ Properties Limited | Real estate | 2026 |
| PL Sales Limited | Real estate | 2019 |
| Placeshapers Limited | Other services | 2013 |
| Plain Jane Stories Limited | Information & communication | 2014 |
| Plain Vision Agency Ltd | Information & communication | 2020 |
| Planai Ltd | Information & communication | 2024 |
| Planet 2030 Ltd | Construction | 2018 |
| Plant Fencing Contractors Limited | Construction | 2004 |
| Plant Property Limited | Real estate | 2018 |
| Plantonin Ltd | Wholesale & retail | 2022 |
| Plantyne Ltd | Wholesale & retail | 2019 |
| Plas Solutions Ltd | Manufacturing | 2020 |
| Plasclip Limited | Manufacturing | 2008 |
| Plast Edge Limited | Manufacturing | 2025 |
| Plastic Solutions UK Distribution Ltd | Administrative & support | 2020 |
| Platinero Ltd | Information & communication | 2022 |
| Platinum Cars & Transport Ltd | Transport & logistics | 2025 |