| Perkins Property Management Ltd | Real estate | 2023 |
| Pernell Productions Ltd | Information & communication | 2024 |
| Personal Data Exchange Ltd | Information & communication | 2025 |
| Personalised Party Prints Limited | Wholesale & retail | 2019 |
| Pet Connect UK Limited | Other services | 2019 |
| Pete's Airlink Ltd | Transport & logistics | 2004 |
| Peter Ernest Homes Holdings Limited | Construction | 2005 |
| Peter Ernest Homes Limited | Construction | 1999 |
| Peter Jones Properties Ltd | Administrative & support | 2008 |
| Peters Cost Consultants Ltd | Construction | 2018 |
| Petersfield Boats Ltd | Arts & recreation | 2014 |
| Petersfield Framing Studios Limited | Wholesale & retail | 2011 |
| Petroleus Ltd | Professional & scientific | 2017 |
| Pets and Pieces Ltd | Wholesale & retail | 2019 |
| PG Van and Car Sales Ltd | Wholesale & retail | 2017 |
| PH Tape and Jointing Services Ltd | Construction | 2020 |
| Pharma Sole Trades Limited | Health & social care | 2025 |
| Pharma Systems Limited | Professional & scientific | 2013 |
| Pharmcroft Limited | Wholesale & retail | 2000 |
| Phat Retail Limited | Wholesale & retail | 2011 |
| Phelan Cloud Accounting Limited | Professional & scientific | 2023 |
| Phen Pipe Services Ltd | Construction | 2022 |
| Pheno Labs Ltd | Information & communication | 2026 |
| Philips & SON Ltd | Health & social care | 2017 |
| Phillips Decorators Limited | Construction | 1994 |
| Phillips Projects Holdings Limited | Real estate | 2001 |
| Phillips Property Company Limited | Real estate | 2017 |
| PHO 888 Ltd | Hospitality | 2026 |
| Phoenix Bespoke Builds Hampshire Ltd | Construction | 2026 |
| Phoenix Data Solutions Ltd | Information & communication | 2025 |
| Phoenix Events Management & Entertainment Limited | Hospitality | 2025 |
| Phoenix New Generation Company Ltd | Hospitality | 2002 |
| PHOENIX2COMPLETE Ltd | Construction | 2020 |
| Phoneco Limited | Administrative & support | 2023 |
| Photons LLP | | 2008 |
| Physio & Co (Hampshire) Ltd | Health & social care | 2025 |
| Physiotherapy-To-Your-Home LLP | | 2017 |
| Phystrax Ltd | Information & communication | 2017 |
| PI Global Quality Solutions Ltd | Administrative & support | 2026 |
| PI Property Holdings Ltd | Real estate | 2025 |
| Pibooks Ltd | Professional & scientific | 2025 |
| Pickwick Property Ltd | Real estate | 2020 |
| Picture This Group Ltd | Construction | 2025 |
| PIE Technology Limited | Professional & scientific | 2013 |
| Piedmont Food and Wine Limited | Wholesale & retail | 2012 |
| Pier Caps UK Limited | Manufacturing | 2017 |
| Pier View (Brighton) Limited | Hospitality | 2014 |
| Pier View Leisure Services Limited | Arts & recreation | 2023 |
| Pilat Wholesale Ltd | Wholesale & retail | 2025 |
| Pilates and Yoga With Hayley Ltd | Health & social care | 2019 |
| Pink Media Studios Limited | Other services | 2024 |
| Pink Rhino IT Support Ltd | Information & communication | 2026 |
| Pinksporium Ltd | Professional & scientific | 2026 |
| Pinnacle Roofing Ltd | Construction | 2020 |
| Pinpoint Accounting Limited | Professional & scientific | 2025 |
| Pinvoice Limited | Information & communication | 2019 |
| Pipe Weld Fabrications Services Limited | Construction | 2008 |
| Piping Hot Plumbing Solutions Ltd | Construction | 2022 |
| Pitch and Game Limited | Extraterritorial | 2016 |
| Pitch Perfect Roofing Ltd | Construction | 2025 |
| Pivot 23 Ltd | Professional & scientific | 2023 |
| Pivotal Collective Limited | Professional & scientific | 2019 |
| PIX LAX Limited | Professional & scientific | 2019 |
| Pixeldev Ltd | Information & communication | 2025 |
| PJ Major Consultancy Limited | Information & communication | 2016 |
| PJ NOM Projects Limited | Construction | 2015 |
| PJ Wright Properties Ltd | Real estate | 2025 |
| PJB Engineering Limited | Manufacturing | 2005 |
| PJJ Properties Limited | Real estate | 2003 |
| Pjmilton & SON Ltd | Real estate | 2021 |
| PJP Group Limited | Wholesale & retail | 2023 |
| PJR Carpentry and Joinery Limited | Construction | 2015 |
| PKS Car Parts Ltd | Wholesale & retail | 2025 |
| PL Casting Co Limited | Arts & recreation | 2025 |
| PL Landscapes Ltd | Administrative & support | 2021 |
| Planet MOT & Service Centre (Holdings) Ltd | Manufacturing | 2013 |
| Plant POT Machinery Limited | Administrative & support | 2022 |
| Plastering and Painting Ltd | Construction | 2015 |
| Plastic Island Media Ltd | Information & communication | 2023 |
| Platinum Master Group Ltd | Construction | 2025 |
| Platinum Plastering (Southern) Ltd | Construction | 2025 |
| Platinum Plastering Solutions Ltd | Construction | 2025 |
| Platinum Pro Maintenance Ltd | Construction | 2024 |
| Playhouse Industries Limited | Arts & recreation | 2010 |
| Plentiful Desserts Limited | Hospitality | 2021 |
| PLJ Advisory Limited | Administrative & support | 2014 |
| Plot Capital Ltd | Financial services | 2022 |
| Plumb Tech Heating Ltd | Construction | 2024 |
| Plumbing & GAS Maintenance Limited | Construction | 2012 |
| Plumbing & Heating Services Limited | Construction | 2014 |
| Plumbing Heating and GAS Ltd | Construction | 2014 |
| Plush Protein Limited | Health & social care | 2022 |
| PM Healthcare Limited | Public administration | 2019 |
| PM PUB & Event Co Limited | Hospitality | 2022 |
| PMC UK Enterprise Ltd | Professional & scientific | 2019 |
| PMD Strategic Planning Limited | Professional & scientific | 2007 |
| PMI Carpentry Ltd | Construction | 2023 |
| PN Builders Southern Limited | Construction | 2013 |
| PND Limited | Real estate | 2021 |
| PNM Enterprises Limited | Agriculture & fishing | 2015 |