| PEN Mill Holdings Ltd | Financial services | 2024 |
| PEN Mill Scaffolding (Hire & Sales) Ltd | Construction | 2010 |
| Pendomer Farming Ltd | Construction | 2023 |
| Penmill Aggregates Ltd | Wholesale & retail | 2025 |
| Penn Hill Properties SW Ltd | Households | 2003 |
| Penn House Yeovil Management Company Limited | Real estate | 2008 |
| Perfect Fit Blinds Yeovil Ltd | Wholesale & retail | 2019 |
| Perkins Plumbing and Heating Limited | Construction | 2015 |
| Permabuild Building Contractors Limited | Agriculture & fishing | 2009 |
| Permabuild South West Limited | Extraterritorial | 2016 |
| Perry Wessex Ltd | Water & waste | 2012 |
| Perrys Holdings Limited | Financial services | 2006 |
| Perrys Recycling Limited | Water & waste | 1975 |
| Petal Perfections Limited | Wholesale & retail | 2018 |
| Pete Worboys Limited | Other services | 2007 |
| Pete's BUN Shop Ltd | Hospitality | 2019 |
| Peter Sommer Travels Ltd | Administrative & support | 2012 |
| Peugeot-Talbot Dealer Association UK | Other services | 1989 |
| PG Fire & Security Ltd | Administrative & support | 2008 |
| PG Security Systems Ltd | Extraterritorial | 2008 |
| PGM Solutions Limited | Households | 2023 |
| Phase Electrical South West Ltd | Construction | 2011 |
| Phelps Flooring Limited | Construction | 2013 |
| Phil Campbell Event Production Limited | Arts & recreation | 2026 |
| Phil Holt Plumbing & Heating Limited | Construction | 2011 |
| Phil James & SON Limited | Construction | 2019 |
| Philcare Ltd | Health & social care | 2015 |
| Phoenix KC Ltd | Real estate | 2021 |
| Phoenix Preservation Limited | Professional & scientific | 1955 |
| Phone N Puff Limited | Wholesale & retail | 2025 |
| Phonefood Limited | Wholesale & retail | 2004 |
| PHS Group SW Ltd | Administrative & support | 2024 |
| Pickle Consultancy Ltd | Professional & scientific | 2017 |
| Piers Pisani Limited | Wholesale & retail | 2001 |
| Pierston Manor Farm Limited | Agriculture & fishing | 2018 |
| Pincer Movement Limited | Information & communication | 2024 |
| Pinnacle Thistle Consultancy Limited | Professional & scientific | 2017 |
| Pitch and Performance Ltd | Wholesale & retail | 2025 |
| PJW Project Management (South West) Ltd | Construction | 2017 |
| Plain Farming (Wilts) Limited | Extraterritorial | 2012 |
| Plastic, Reconstructive and Aesthetic Surgeons Indemnity Scheme Ltd | Professional & scientific | 2009 |
| Play Haven Crewkerne Limited | Arts & recreation | 2025 |
| Playtownparties Ltd | Arts & recreation | 2020 |
| Plum Orchard (Management) Limited | Households | 1995 |
| Plutus Accountancy Limited | Extraterritorial | 2011 |
| PNK Pet Services Ltd | Other services | 2025 |
| PNM UK Enterprises Ltd | Information & communication | 2023 |
| Polygon Imaging Ltd | Professional & scientific | 2022 |
| Pontoon Works Limited | Construction | 2008 |
| Poole & Co Pension Nominees Limited | Extraterritorial | 2008 |
| Porta Antigua Limited | Financial services | 2026 |
| Porter Dodson LLP | | 2012 |
| Porter Dodson Trust Corporation Limited | Administrative & support | 2023 |
| Portman Court Management Company Limited | Households | 1989 |
| Posh Pooches Limited | Wholesale & retail | 2003 |
| Poster Freaks Limited | Wholesale & retail | 2019 |
| Powerbox International Limited | Wholesale & retail | 2009 |
| Powerbox IT Limited | Wholesale & retail | 2013 |
| Powergen Sealing Solutions Ltd | Manufacturing | 2023 |
| Powersafe Electrical SW Limited | Construction | 2017 |
| Poyntington Holdings Ltd | Financial services | 2020 |
| Ppat Education | Education | 2013 |
| Practice Care Limited | Extraterritorial | 2002 |
| Premier Fencing Taunton Limited | Manufacturing | 2019 |
| Premier Oak Buildings Ltd | Manufacturing | 2021 |
| Prenax Limited | Arts & recreation | 2000 |
| Preston Furnishing Ltd | Other services | 2025 |
| Preston Happy Limited | Hospitality | 2026 |
| Preston Road (Yeovil) Limited | Real estate | 2022 |
| Prettypolly Languages Limited | Information & communication | 2023 |
| Pricess Street Barbers Ltd | Other services | 2023 |
| Prime Horizon Ltd | Administrative & support | 2023 |
| Printasleeve Holdings Limited | Financial services | 2025 |
| Printasleeve Limited | Manufacturing | 1987 |
| Prism Defence Ltd | Administrative & support | 2011 |
| Private Staffing Limited | Extraterritorial | 2010 |
| Pro Lifting Somerset Ltd | Administrative & support | 2018 |
| Pro Precision Plumbing and Heating Ltd | Construction | 2024 |
| Pro-Dec (Solutions) Ltd | Construction | 2011 |
| Pro-Fit (Kent) Ltd | Construction | 2025 |
| Pro-Fit (South-West) Limited | Construction | 2024 |
| Pro-Fit Bournemouth Ltd | Construction | 2025 |
| Pro-Fit Floor Coverings Ltd | Construction | 2014 |
| Pro:Atria Limited | Information & communication | 2001 |
| Prof Consulting Group Ltd | Professional & scientific | 2023 |
| Progress Commercial Property Lettings Ltd | Real estate | 2024 |
| Progress Gym Limited | Arts & recreation | 2010 |
| Progressivesolutionsdynamix Ltd | Professional & scientific | 2026 |
| Project Dance Enterprises Limited | Arts & recreation | 2021 |
| Project Dance Limited | Arts & recreation | 2025 |
| Projectklowd Game Studios Ltd | Information & communication | 2018 |
| Properdrum Limited | Arts & recreation | 2002 |
| Property Doctors (Yeovil) Ltd | Construction | 2025 |
| Propertyadapt Ltd | Wholesale & retail | 2023 |
| Protim Services Limited | Professional & scientific | 1962 |
| Proudhouse Property Management LLP | | 2010 |
| Puck Investments Limited | Construction | 2015 |
| Puff Sweet Limited | Professional & scientific | 2010 |
| Pulse Gym Ltd | Arts & recreation | 2019 |
| Pulse Interior Systems Limited | Construction | 2017 |