| OWL Furniture Limited | Manufacturing | 2024 |
| P & F Holdings Limited | Professional & scientific | 2017 |
| P H Williams Limited | Real estate | 2007 |
| P Toward Ltd | Professional & scientific | 2022 |
| PAB Pipe Services Limited | Construction | 2002 |
| Paco Consulting Limited | Information & communication | 2019 |
| PAH Financial Solutions Ltd | Professional & scientific | 2025 |
| PAL Associates Limited | Real estate | 2007 |
| PAL Sports Limited | Administrative & support | 2016 |
| Pampara Limited | Real estate | 2024 |
| Pancho Datos Limited | Wholesale & retail | 2017 |
| Panevino Stamford Ltd | Hospitality | 2025 |
| Pantain Services Limited | Information & communication | 2025 |
| Panthera Property Management Limited | Real estate | 2019 |
| Papaya Academy Limited | Information & communication | 2019 |
| Papaya IP Limited | Information & communication | 2013 |
| Papaya Resources Ltd | Extraterritorial | 2010 |
| Papworth Plastering and Rendering Ltd | Construction | 2019 |
| Paraportal Ltd | Information & communication | 2023 |
| Park House Family Investments | Financial services | 2017 |
| Park Move Ltd | Information & communication | 2018 |
| Park ‘N’ Co Limited | Wholesale & retail | 2025 |
| Parker FRY Recovery Limited | Wholesale & retail | 2002 |
| Parkin Commercial Storage Limited | Real estate | 2019 |
| Parkin Property Services Limited | Real estate | 2009 |
| Parkland Homes Developments Limited | Construction | 2019 |
| PAT DU Pille Limited | Extraterritorial | 2020 |
| Pathway Creative Ltd | Professional & scientific | 2025 |
| Patient Grace Limited | Arts & recreation | 2014 |
| Pause-I Limited | Professional & scientific | 2017 |
| Payton Properties Limited | Real estate | 2013 |
| PDS Interim Ltd | Professional & scientific | 2023 |
| PE Glass Repairs Limited | Water & waste | 2023 |
| Pegasus Advisory Limited | Professional & scientific | 2017 |
| Pegasus Aviation & Marine Limited | Professional & scientific | 2015 |
| Pegasus Funding Solutions Limited | Financial services | 2015 |
| Pegasus Horseshoes Limited | Real estate | 1979 |
| Pegasus Potential Ltd | Professional & scientific | 2019 |
| Peninsula Ltd | Professional & scientific | 2023 |
| Penmor Financial Planning Limited | Financial services | 2005 |
| Penstar Developments Limited | Real estate | 2017 |
| Penstar Locations Limited | Real estate | 2018 |
| Penstar Management Limited | Households | 2022 |
| Peony Buildings Ltd | Construction | 2023 |
| People Talent Limited | Administrative & support | 2022 |
| Peponi Productions Ltd | Information & communication | 2025 |
| Performantic Ltd | Information & communication | 2022 |
| Permanent Cosmetics Stamford Limited | Other services | 2021 |
| Permanent Cosmetics Training Limited | Other services | 2019 |
| Personal Mortgage Solutions Ltd | Financial services | 2014 |
| Personal Vehicle Investments Limited | Real estate | 2006 |
| Persuasion Jujitsu Ltd | Professional & scientific | 2022 |
| Peter Collins Limited | Professional & scientific | 2018 |
| Peters' Cleaners Ltd. | Other services | 2016 |
| Petra's Hair and Beauty Ltd | Other services | 2025 |
| Petroarmour Limited | Wholesale & retail | 2014 |
| Petsscore Ltd | Information & communication | 2021 |
| Pfpr Limited | Information & communication | 2020 |
| PFW Holdings Ltd | Information & communication | 2019 |
| PGS Foods Ltd | Hospitality | 2024 |
| PH1 Property Developments Limited | Construction | 2019 |
| Phase 6 Advisory Ltd | Professional & scientific | 2025 |
| Philip Tordoff Financial Ltd | Financial services | 2016 |
| Phoenix and FAR Ltd | Real estate | 2025 |
| Phoenix People Consulting Ltd | Administrative & support | 2020 |
| Phyona Ltd | Agriculture & fishing | 2021 |
| Pineapple Empire Ltd | Professional & scientific | 2022 |
| Pinewood Star Limited | Real estate | 2003 |
| Ping (Herts) Operations Limited | Arts & recreation | 2018 |
| Pink Feet Distillery Limited | Manufacturing | 2020 |
| Pinnacle Property Consultants Limited | Professional & scientific | 2025 |
| Pinnd App Ltd | Administrative & support | 2025 |
| Pion Developments B Ltd | Construction | 2026 |
| Pion Developments Ltd | Construction | 2026 |
| Pion Properties Ltd | Real estate | 2026 |
| Pion Property Ltd | Real estate | 2023 |
| Pioneer Intervention Ltd | Education | 2019 |
| Pipit Scientific Limited | Professional & scientific | 2018 |
| Pixel and Paper Limited | Wholesale & retail | 2025 |
| PJ Indiana Ltd | Health & social care | 2024 |
| PJH Law Services Limited | Professional & scientific | 2014 |
| PJH Law Solicitors LLP | | 2022 |
| PJT Site Services Ltd | Administrative & support | 2015 |
| Pk&Bk Property Limited | Real estate | 2024 |
| Plainworth Limited | Construction | 1978 |
| Platform 6 Limited | Administrative & support | 2017 |
| Play Fund WIN Ltd | Information & communication | 2020 |
| Plocienniczak Property Ltd | Extraterritorial | 2024 |
| Plough Environmental Services Ltd | Administrative & support | 2009 |
| PMH ENG Ltd | Professional & scientific | 2014 |
| Pocket Chargers Ltd | Wholesale & retail | 2025 |
| POD Clothing Limited | Wholesale & retail | 2026 |
| Pods-To-Go.Com Limited | Transport & logistics | 2012 |
| Pointy Hills Media Limited | Information & communication | 2023 |
| Pondering APE Labs Ltd | Information & communication | 2022 |
| Pondus Limited | Information & communication | 2020 |
| Poplar Family Investments | Financial services | 2023 |
| Portass, Holmes, Marshall Ltd | Real estate | 2021 |
| Porter-Turnbull Genomics Consultancy Limited | Professional & scientific | 2026 |
| Portland View Ltd | Real estate | 2018 |