| PRO3 Limited | Wholesale & retail | 2024 |
| Prockters Farming Limited | Agriculture & fishing | 2017 |
| Proco-Sts Limited | Manufacturing | 2004 |
| Prodash Ltd | Professional & scientific | 2010 |
| Profectus Ltd | Wholesale & retail | 2023 |
| Professional Cloud Solutions Ltd | Information & communication | 2015 |
| Professional Financial Partnerships Limited | Financial services | 2000 |
| Progress Developments South West Limited | Real estate | 2016 |
| Progress Land (1) Limited | Real estate | 2018 |
| Progress Land (Sandford) Limited | Real estate | 2016 |
| Progress Land (Thornbury) Limited | Real estate | 2018 |
| Progress Land (Trispen) Limited | Real estate | 2016 |
| Progress Land (Wadebridge) Limited | Real estate | 2015 |
| Progress Land Limited | Real estate | 2017 |
| Progress Recruitment Limited | Administrative & support | 2025 |
| Progressive Heating Supplies Limited | Administrative & support | 2002 |
| Prohire Plant Ltd | Administrative & support | 2023 |
| Project Manager (Devon) Ltd | Construction | 2018 |
| Project N3 Ltd | Financial services | 2025 |
| Project POP Limited | Financial services | 2019 |
| Project Simpel (UK) Limited | Information & communication | 2021 |
| Projectfirst Property Management Limited | Real estate | 1990 |
| Prolec Contracting Limited | Construction | 1997 |
| Prolec Domestic Installations Limited | Construction | 2016 |
| Proline Roofing & Solar Ltd | Construction | 2025 |
| Promethean Creations Limited | Information & communication | 2021 |
| Promo Lotus Home Developers Ltd | Financial services | 2014 |
| Promote Public Relations Limited | Administrative & support | 1997 |
| Propco South West Limited | Construction | 1996 |
| Proper Local - Somerset Ltd | Agriculture & fishing | 2025 |
| Property Consortium (Holdings) Limited | Professional & scientific | 2011 |
| Property Consortium Drainage Limited | Financial services | 2009 |
| Property Consortium UK Limited | Construction | 1996 |
| Property Developments (Minehead) Limited | Real estate | 1963 |
| Property Flood Resilience Solutions Ltd | Construction | 2025 |
| Property Professional Painting and Decorating Ltd | Construction | 2024 |
| Propertyplans(Southwest) Ltd | Professional & scientific | 2009 |
| Prospect & Hemlock Ltd | Wholesale & retail | 2024 |
| Prospergate Property Ltd | Real estate | 2026 |
| Prosperous Energy Limited | Professional & scientific | 2003 |
| Prospex Consulting Limited | Mining & quarrying | 2021 |
| Prosser & Pike Limited | Construction | 2006 |
| Protea South West Limited | Extraterritorial | 2010 |
| Proteam Garage Ltd | Wholesale & retail | 2026 |
| Protel Associates Limited | Professional & scientific | 1998 |
| Protel Group Limited | Financial services | 2026 |
| Protel Limited | Professional & scientific | 2004 |
| Proteus Project Management Limited | Professional & scientific | 2006 |
| Prouse Automotive Limited | Wholesale & retail | 2026 |
| Provenance IB Ltd | Financial services | 2018 |
| Prune Harris Ltd. | Health & social care | 2013 |
| PS Gill Transport Limited | Transport & logistics | 2024 |
| Pscm Support Ltd | Construction | 2021 |
| PSDP1864 Limited | Health & social care | 2010 |
| Psehubs Ltd | Information & communication | 2024 |
| PSO Construction Limited | Construction | 2018 |
| Psychiatry Consultancy Limited | Health & social care | 2019 |
| Ptaph Ltd | Extraterritorial | 2017 |
| PTF Property Development Ltd | Real estate | 2024 |
| PTL Engineering Services Ltd | Professional & scientific | 2025 |
| Ptunstill Ltd | Financial services | 2023 |
| Pundit International Limited | Wholesale & retail | 2023 |
| Puptons Ltd | Wholesale & retail | 2023 |
| Pure Nutrition Supplements Ltd | Wholesale & retail | 2026 |
| Pure Plumb South West Ltd | Construction | 2025 |
| Pure Protection Ltd | Financial services | 2011 |
| Purepools Limited | Construction | 2023 |
| Purple Conker Ltd | Professional & scientific | 2014 |
| Purple Elephant in the Room Ltd | Education | 2013 |
| Purple Hammer Limited | Professional & scientific | 2024 |
| Purple Sheep (UK) Limited | Professional & scientific | 2014 |
| Purplehorse Design Ltd | Wholesale & retail | 2020 |
| Purplelux Lighting Solutions Ltd | Wholesale & retail | 2020 |
| Purpose Built Construction Ltd | Construction | 2024 |
| Pursuit of Gospel CIC | Arts & recreation | 2025 |
| PW Electrical Limited | Construction | 2010 |
| PW Solutions Limited | Construction | 2020 |
| Pyzmeara Limited | Professional & scientific | 2021 |
| PZT Logistics Ltd | Transport & logistics | 2014 |
| Qaimgo Limited | Professional & scientific | 2025 |
| Qdos Cricket Ltd | Wholesale & retail | 2018 |
| QED Verify Limited | Information & communication | 2023 |
| QED Wealth Management Ltd | Financial services | 2007 |
| Qiva Global Limited | Professional & scientific | 2016 |
| Qiyaki Limited | Professional & scientific | 2014 |
| Qn’S Events & Retreats Limited | Hospitality | 2021 |
| QP Holdings Limited | Professional & scientific | 2003 |
| Qroam Ltd | Financial services | 2024 |
| Qualitas Juridische Dienstverlening LLP | | 2012 |
| Quality Construction Solutions Ltd | Construction | 2026 |
| Quality Installations (Southwest) Limited | Construction | 2012 |
| Quality Service Printers (Taunton) Limited | Manufacturing | 1980 |
| Quality Surgical Services Ltd | Health & social care | 2010 |
| Quantock & Exmoor Tree Care Ltd | Agriculture & fishing | 2016 |
| Quantock 2001 Management Company Limited | Households | 2001 |
| Quantock Analytical Limited | Financial services | 2008 |
| Quantock and Exmoor Limited | Construction | 2014 |
| Quantock Automotive Ltd | Wholesale & retail | 2024 |
| Quantock Biodiversity Ltd | Real estate | 2024 |
| Quantock Builders Limited | Construction | 2008 |