| PHK Developments Limited | Construction | 2013 |
| Phoenix Feeds Limited | Wholesale & retail | 1992 |
| Phoenix Housing Properties Cumbria Ltd | Real estate | 2026 |
| Phoenix Housing Support Cumbria Ltd | Hospitality | 2023 |
| PHR Commercial Consultants Ltd | Professional & scientific | 2025 |
| PHX Training Limited | Education | 2004 |
| PHYSIO2UCARLISLE Ltd | Health & social care | 2023 |
| PI Houses Limited | Real estate | 2015 |
| Picopietech Ltd | Information & communication | 2025 |
| Pied Piper Pictures Limited | Information & communication | 2008 |
| Pier 1 Metalworks Limited | Manufacturing | 2001 |
| Pincushion Partners Limited | Real estate | 2015 |
| Pink Paperclip Ltd | Administrative & support | 2025 |
| Pinloco Ltd | Information & communication | 2026 |
| Pinna Ltd | Real estate | 2026 |
| Pipes Plumbing & Heating Ltd | Construction | 2022 |
| Pipes Properties Ltd | Real estate | 2026 |
| Pirate Spirit Ltd | Wholesale & retail | 2023 |
| Pivotal 3C Ltd | Professional & scientific | 2015 |
| Pizza Base Carlisle Ltd | Hospitality | 2016 |
| Pizza Mafia Carlisle Limited | Hospitality | 2025 |
| Pizza Planet Denton Holme Ltd | Hospitality | 2024 |
| Pizza Point Carlisle Ltd | Hospitality | 2026 |
| PJ Plant Services Limited | Administrative & support | 2015 |
| PJO Haulage Limited | Transport & logistics | 2015 |
| PJR Celebrant Services Limited | Other services | 2026 |
| PJS Advisory Limited | Professional & scientific | 2022 |
| PJT Carlisle Ltd | Manufacturing | 2020 |
| PJT Property Investment Ltd | Real estate | 2017 |
| Pkas Consultancy Ltd | Professional & scientific | 2022 |
| Plain Purpose Limited | Professional & scientific | 2022 |
| Planeatry Alliance Ltd | Health & social care | 2024 |
| Plastering Solutions (Northern) Limited | Construction | 2024 |
| Platinum (PP) Trustees Limited | Extraterritorial | 1996 |
| Platinum Trustees Limited | Extraterritorial | 1996 |
| Playground Projects Ltd | Construction | 2008 |
| Pldelv Limited | Transport & logistics | 2020 |
| Pleasant Stewards Limited | Transport & logistics | 2026 |
| PLM (Carlisle) Ltd | Hospitality | 2018 |
| Plough Inn Wreay Limited | Hospitality | 2021 |
| Plumbersmate UK Limited | Wholesale & retail | 2008 |
| Plumbing Medic Limited | Extraterritorial | 2019 |
| Plumgarths Farm Shop Limited | Manufacturing | 2019 |
| PLUS3K Limited | Information & communication | 2018 |
| Plyline North West Limited | Wholesale & retail | 2020 |
| PM JAG Properties Ltd | Extraterritorial | 2021 |
| PMR Drives Limited | Professional & scientific | 2017 |
| PMS Fabrications (Holdings) Limited | Financial services | 2023 |
| PMS Fabrications (Services) Limited | Administrative & support | 2023 |
| PMS Fabrications Limited | Manufacturing | 2000 |
| Pocok Ltd | Transport & logistics | 2016 |
| Pokhara PVT Ltd | Wholesale & retail | 2012 |
| Polish Restaurant Krakow Ltd | Hospitality | 2022 |
| Polishinterior UK Limited | Construction | 2015 |
| Pollard IT Services Ltd | Information & communication | 2016 |
| Pollock Farming | Administrative & support | 2009 |
| Pollux Logistics Ltd | Transport & logistics | 2026 |
| Polwheveral Ltd | Health & social care | 2021 |
| Pomegranate Property Management Limited | Real estate | 2008 |
| Pond Services Ltd | Administrative & support | 2025 |
| Pondtec Ltd | Construction | 2020 |
| Poplars Farm Eggs Ltd | Wholesale & retail | 2011 |
| Pori Farming Limited | Agriculture & fishing | 2026 |
| Port Road Garage Limited | Administrative & support | 2012 |
| Portify Technologies Ltd | Information & communication | 2024 |
| Portland Construction Management Services Limited | Construction | 2017 |
| Portland Square (North) Residential Management Limited | Households | 2021 |
| Portland Square (South) Residential Management Limited | Households | 2022 |
| Portland Square Dental Limited | Health & social care | 2018 |
| Portland Squared Ltd | Health & social care | 2024 |
| Portland Two Three Ltd | Health & social care | 2025 |
| Portzim Limited | Hospitality | 1975 |
| Positive (Eden) Limited | Wholesale & retail | 2000 |
| Postlethwaite Construction Limited | Construction | 2003 |
| Powburgh Gardens Limited | Households | 2022 |
| Power on Publishing Ltd | Wholesale & retail | 2022 |
| Powerup Machinery Limited | Wholesale & retail | 2015 |
| PP Esco (Clapham Park) Ltd | Wholesale & retail | 2019 |
| PP Esco (Springfield) Ltd | Wholesale & retail | 2019 |
| PP Esco Divisionco Ltd | Financial services | 2021 |
| PP Esco Holdco Ltd | Financial services | 2020 |
| PP New Esco Holdco Ltd | Financial services | 2021 |
| PPG 2 Ltd | Administrative & support | 2019 |
| PR Foster Limited | Transport & logistics | 2022 |
| PR Johnston Engineering Solutions Limited | Professional & scientific | 2024 |
| Practical Accountancy Services Limited | Professional & scientific | 2011 |
| Precise Solutions GPS Limited | Administrative & support | 2007 |
| Premiair Comfort Limited | Energy | 2014 |
| Premier Blinds & Curtains Ltd | Manufacturing | 2019 |
| Premier Electrical (Carlisle) Limited | Wholesale & retail | 2019 |
| Premier Electrical Ltd. | Wholesale & retail | 1997 |
| Premier Glass Wigton Limited | Construction | 2003 |
| Premier Management Services (UK) Limited | Professional & scientific | 2002 |
| Premium Quality Services Ltd | Wholesale & retail | 2016 |
| Prestige Bathroom Design Ltd | Wholesale & retail | 2025 |
| Prestige Wheels (Carlisle) Limited | Wholesale & retail | 2024 |
| Prethought Limited | Professional & scientific | 2002 |
| Primary Care Collaborative North Cumbria Limited | Health & social care | 2024 |
| Primary Care Warwickshire Limited | Health & social care | 2014 |
| Prime UK Services Limited | Construction | 2022 |