| Pike Live Limited | Arts & recreation | 2026 |
| Pilgrims Farming Company Limited | Agriculture & fishing | 1997 |
| Pilgrims Way Salisbury Limited | Households | 2023 |
| Pimpinit Limited | Wholesale & retail | 2009 |
| Pine Grove Partners Limited | Real estate | 2024 |
| Pine World Superstores Limited | Wholesale & retail | 2003 |
| Pinewood Securities Ltd | Construction | 2019 |
| Pinewood Service Centre Ltd | Wholesale & retail | 2026 |
| Ping Ping Property Ltd | Households | 2025 |
| Pink HAT Designs Limited | Wholesale & retail | 2025 |
| Pinkham Equine Limited | Professional & scientific | 2014 |
| Pinnacle Blocks Ltd | Information & communication | 2024 |
| Pippards Court (Somerton) Management Company Limited | Households | 2017 |
| Pitapita Limited | Hospitality | 2025 |
| Pitt & Hewlett Risk Consulting Ltd | Financial services | 2016 |
| Pivotal Moment Ventures Limited | Information & communication | 2024 |
| Piwakawaka Ltd | Professional & scientific | 2022 |
| Pixipixel Rental Limited | Professional & scientific | 2020 |
| Pixuna Limited | Professional & scientific | 2011 |
| PJS Building Services Limited Liability Partnership | | 2007 |
| PJW Automotive Ltd | Wholesale & retail | 2023 |
| PJW Management Limited | Hospitality | 2015 |
| PK & P Foote Limited | Wholesale & retail | 2017 |
| PK Window Cleaning Ltd | Administrative & support | 2024 |
| PKF Engineering Salisbury Ltd | Wholesale & retail | 2019 |
| PKT Strategy Limited | Administrative & support | 2007 |
| PL Electrical Install Ltd | Construction | 2013 |
| Pl-Infosec Ltd | Information & communication | 2026 |
| Place REC USA Ltd | Administrative & support | 2010 |
| Plain Equine Limited | Professional & scientific | 2014 |
| Plain Huts Ltd. | Manufacturing | 2014 |
| Plain Plays Limited | Arts & recreation | 1960 |
| Plain Solutions Ltd | Professional & scientific | 2026 |
| Plane Joinery Ltd | Manufacturing | 2025 |
| Plant Hire (South) Limited | Administrative & support | 2020 |
| Planted Cities Ltd | Administrative & support | 2019 |
| Plantlife Biodiversity Enhancements Ltd | Professional & scientific | 2024 |
| Plantlife International - the Wild Plant Conservation Charity | Professional & scientific | 1996 |
| Plantlife Trading Limited | Professional & scientific | 1992 |
| Plants at Work Ltd | Other services | 2000 |
| Playcom Supplies Ltd | Manufacturing | 2022 |
| Playgc Theatre Company Limited | Arts & recreation | 2020 |
| Playground Pals Ltd | Education | 2023 |
| Pleasefindit Limited | Hospitality | 2000 |
| Plemstall Developments Limited | Real estate | 2021 |
| Plenty Consulting Ltd | Administrative & support | 2023 |
| Plot 8 Management Company Limited | Real estate | 1989 |
| Plot B (Warminster) Manco Limited | Households | 2018 |
| Plox Green Management Company Limited | Real estate | 1983 |
| Plug and Pass Safety Solutions Ltd | Professional & scientific | 2025 |
| Plumridge Family Investment Company Ltd | Real estate | 2022 |
| Plutus Consulting Group Limited | Professional & scientific | 2020 |
| PMC Property Holdings Limited | Hospitality | 2021 |
| PML Accounting Limited | Professional & scientific | 2007 |
| PMP Procurement Training and Consultancy Limited | Education | 2019 |
| Pmsearchconsult Limited | Administrative & support | 2014 |
| PMX Salisbury Limited | Construction | 2012 |
| Pocket Industries Limited | Extraterritorial | 2015 |
| Pocket Stress Buster Limited | Education | 2018 |
| POD and PIP Limited | Wholesale & retail | 2020 |
| Podi Pouch Limited | Wholesale & retail | 2025 |
| Pointing Higher Limited | Professional & scientific | 2010 |
| Polecat Programming Limited | Information & communication | 2018 |
| Poleclear Limited | | 1988 |
| Polip Limited | Other services | 2017 |
| Political Developments Ltd | Information & communication | 2008 |
| Polly Press Limited | Extraterritorial | 2017 |
| Polygon Land Limited | Real estate | 2011 |
| Polysteel (UK) Limited | Wholesale & retail | 2005 |
| POM2004 Limited | Real estate | 2003 |
| Pomegranate Magic Ltd | Professional & scientific | 2016 |
| Poole Sea Angling Centre Limited | Wholesale & retail | 2003 |
| Popeshead Alley Warehouse Management Company Limited | Households | 2005 |
| Popeyes SP1 Ltd | Hospitality | 2025 |
| Population Ltd | Extraterritorial | 2015 |
| Portcullis Commercial Limited | Professional & scientific | 2017 |
| Portfolio Planning Plus Ltd | Information & communication | 2022 |
| Portobello Floors Limited | Construction | 2022 |
| Porton Biopharma Limited | Manufacturing | 2014 |
| Porton Fire Services Ltd | Construction | 2017 |
| Porton Local Ltd | Hospitality | 2025 |
| Porton Ventures (UK) Limited | Wholesale & retail | 2000 |
| Portway Design LLP | | 2002 |
| Portway Music Limited | Arts & recreation | 2024 |
| Portway Precision Limited | Real estate | 1986 |
| Positive Ecology Ltd | Professional & scientific | 2021 |
| Positive Nature Ltd | Other services | 2017 |
| Possibility Space DT Limited | Professional & scientific | 2018 |
| Pots of Sweets Ltd | Wholesale & retail | 2022 |
| Potternewton Management Company Limited | Households | 1983 |
| Potternewton Mount Management Company Limited | Households | 2008 |
| Potton (Ridgeway Place) Management Company Limited | Households | 2024 |
| POW & Tinkler Properties Ltd | Real estate | 2020 |
| Powerfleet Systems Ltd | Manufacturing | 2000 |
| Powerlinks Motorcycles Ltd | Wholesale & retail | 2026 |
| Pplus Skin Care Limited | Health & social care | 2014 |
| PR Builders (Salisbury) Ltd | Construction | 2007 |
| Prabhuamutha Ltd | Health & social care | 2024 |
| Prabhudas Ltd | Wholesale & retail | 2020 |
| Practix Capital Limited | Financial services | 2014 |