| Portlock Tree Surgery Limited | Other services | 2015 |
| Portman - Lomas Properties Limited | Real estate | 1997 |
| Portman Lomas Limited | Professional & scientific | 1991 |
| Porton Bioscience and Technology Centre Limited | Real estate | 2005 |
| Portugal and Brazil Foods Limited | Wholesale & retail | 2007 |
| Posh House Ltd | Wholesale & retail | 2020 |
| Positive Media Group Limited | Administrative & support | 2002 |
| Poslo Limited | Professional & scientific | 2017 |
| Potts Partnership Ltd | Hospitality | 2009 |
| Pour Bois Coffee Ltd | Manufacturing | 2024 |
| Pour Bois Limited | Extraterritorial | 2022 |
| POW Shrivenham Limited | Hospitality | 2023 |
| Powell & Hughes Ltd | Hospitality | 2026 |
| Power & Pilates Ltd | Arts & recreation | 2026 |
| Power Facilities Maintenance Ltd | Administrative & support | 2019 |
| Power Physio Group Limited | Health & social care | 2025 |
| Power Project Resources Ltd | Professional & scientific | 2018 |
| Power Saver Limited | Manufacturing | 1997 |
| Power Treasure Tech Ltd | Manufacturing | 2024 |
| Powered Machine Repair Ltd | Professional & scientific | 2023 |
| Powerful Commerce Ltd | Information & communication | 2019 |
| Powerhouse Event Limited | Administrative & support | 2026 |
| Powerparts Distribution Limited | Wholesale & retail | 2025 |
| Powerwash Contractors Ltd | Administrative & support | 2020 |
| Ppej Limited | Professional & scientific | 2011 |
| PPG Blunsdon Ltd | Hospitality | 2025 |
| PPL 07678037 Limited | Extraterritorial | 2011 |
| Ppld Limited | Construction | 2014 |
| Pproject Limited | Arts & recreation | 2022 |
| PR Beauty and Hair Academy Ltd | Education | 2022 |
| PR Croton Carpentry and Joinery Ltd | Manufacturing | 2025 |
| PR Group (AWC) Holdings Limited | Financial services | 2024 |
| Prab's Estate Ltd | Real estate | 2026 |
| Practical Family Homes Ltd | Construction | 2003 |
| Practicall Cleaning Services Ltd | Administrative & support | 2025 |
| Practicall Support Services Ltd | Health & social care | 2019 |
| Practice Transformation Alliance Limited | Professional & scientific | 2021 |
| Pragna IT Limited | Information & communication | 2026 |
| Prameera Limited | Manufacturing | 2025 |
| Prana International Academy Ltd | Education | 2025 |
| Praveen Trading Ltd | Wholesale & retail | 2019 |
| Pravid Solutions Limited | Information & communication | 2011 |
| PRC Homes 1985 Limited | Construction | 2024 |
| PRC Homes Ltd | Construction | 2018 |
| PRC Homes XL Limited | Administrative & support | 2016 |
| PRC Mortgages Ltd | Real estate | 2001 |
| Precision Ballistics Laboratories Ltd | Professional & scientific | 2019 |
| Precision Component Services Ltd | Manufacturing | 2006 |
| Precision Design Technology Limited | Information & communication | 1985 |
| Precision Financial Consulting Limited | Financial services | 2013 |
| Precision Financial Solutions Limited | Financial services | 2017 |
| Precision Optical Transceivers UK Limited | Manufacturing | 2020 |
| Precision Phantom Properties Limited | Construction | 2023 |
| Precision Plant Services Limited | Manufacturing | 2025 |
| Precision Specialist Assembly Limited | Professional & scientific | 2022 |
| Precision Varionic International Limited | Manufacturing | 1998 |
| Preet's Construction Ltd | Construction | 2023 |
| Preet's Properties Ltd | Real estate | 2025 |
| Preeti Technologies Ltd | Information & communication | 2023 |
| Premier Bongos Limited | Wholesale & retail | 2013 |
| Premier Builders (Swindon) Limited | Construction | 2001 |
| Premier Commercial Road Ltd | Wholesale & retail | 2025 |
| Premier Deliveries Ltd | Wholesale & retail | 2024 |
| Premier Ice Hockey League Ltd | Arts & recreation | 2024 |
| Premier Park Management Company Limited | Professional & scientific | 2001 |
| Premier Plumbing and Heating (Swindon) Limited | Construction | 2011 |
| Premier Property Consultants Ltd | Construction | 2025 |
| Premier Renewables Wiltshire Ltd | Construction | 2022 |
| Premier Services Wilts Ltd | Construction | 2022 |
| Premier Services Wiltshire Limited | Water & waste | 2009 |
| Premier Sheetmetal Limited | Manufacturing | 2012 |
| Premier SSM Ltd | Wholesale & retail | 2022 |
| Premier Swindon Ltd | Wholesale & retail | 2025 |
| Premiere Services (Swindon) Ltd | Construction | 2014 |
| Premium Asphalt Services Ltd | Construction | 2024 |
| Premium Bites Ltd | Hospitality | 2024 |
| Premium Doors Ltd | Construction | 2023 |
| Premium Travel Limited | Administrative & support | 2020 |
| Premscare Solutions Ltd | Public administration | 2019 |
| Prepay Technologies Limited | Administrative & support | 2000 |
| Presco UK Limited | Manufacturing | 2006 |
| Presentation Direct Limited | Administrative & support | 2019 |
| Prestige Bodyworks (Chippenham) Limited | Wholesale & retail | 2010 |
| Prestige Build Services Ltd | Construction | 2021 |
| Prestige Care and Training Services Ltd | Health & social care | 2024 |
| Prestige Cleaning Solutions South West Limited | Administrative & support | 2017 |
| Prestige Collectionz Ltd | Wholesale & retail | 2025 |
| Prestige Property Management Service Ltd | Administrative & support | 2011 |
| Prestige Repairs and Services Ltd | Manufacturing | 2025 |
| Prestige Selection Ltd | Construction | 2019 |
| Prestige Wood and Reclamation Ltd | Wholesale & retail | 2021 |
| PRESTON23 Resources Ltd | Administrative & support | 2022 |
| PRH Consulting (Highworth) Ltd | Professional & scientific | 2024 |
| Price Consultancy Limited | Professional & scientific | 2020 |
| Prickley Health Care Ltd | Health & social care | 2025 |
| Prickly Pear Limited | Professional & scientific | 2026 |
| Pride Dental Practice Ltd | Health & social care | 2025 |
| PRIDE2CARE Solutions Ltd. | Health & social care | 2025 |
| Prima Housing Ltd | Real estate | 2025 |
| Prima Installations Limited | Construction | 2014 |