| Pilgrim Staffing Ltd | Administrative & support | 2025 |
| Pilgrim Veterinary Group Ltd | Professional & scientific | 2013 |
| Pilgrimage Short Stay Recovery Units Ltd | Health & social care | 2018 |
| Pimlico Cold Storage Limited | Transport & logistics | 2015 |
| Pindour Ltd | Transport & logistics | 2018 |
| Pink O (Kent) Ltd | Wholesale & retail | 2024 |
| Pinto Solutions Ltd | Transport & logistics | 2018 |
| Pipa Media Limited | Health & social care | 2008 |
| Pirates Cutters Ltd | Administrative & support | 2008 |
| Pitch LAB Group Ltd | Administrative & support | 2025 |
| Pitcher Farms Limited | Agriculture & fishing | 1951 |
| Plac Ltd | Professional & scientific | 2013 |
| Planet Power Recruit UK Ltd | Administrative & support | 2019 |
| Plant Training Hub Ltd | Administrative & support | 2025 |
| Planted Terraria Exotics Ltd | Wholesale & retail | 2020 |
| Plastic Conscious Ltd | Wholesale & retail | 2024 |
| Playertrader Ltd | Information & communication | 2024 |
| Playmax Ltd | Wholesale & retail | 2025 |
| Plikas Ltd | Transport & logistics | 2022 |
| Plnt Design Ltd | Information & communication | 2021 |
| Plotbox, Inc. | | 2014 |
| Plotway Consultancy Ltd | Professional & scientific | 2024 |
| Plotway Lettings Ltd | Real estate | 2019 |
| Plotway Limited | Financial services | 2014 |
| Plotway Properties Ltd | Real estate | 2020 |
| Plotway Team Ltd | Real estate | 2017 |
| Plus Point Staff and Consultancy Ltd | Administrative & support | 2017 |
| PM JM Team Limited | Transport & logistics | 2026 |
| PMB Enterprises Limited | Professional & scientific | 2015 |
| Pmic Ltd | Professional & scientific | 2024 |
| PNP UK Holdings Ltd | Financial services | 2025 |
| PNP Ventures Limited | Information & communication | 2017 |
| PNR Workforce Limited | Transport & logistics | 2003 |
| Pointer Pet Products Limited | Manufacturing | 2009 |
| Pointmeadow Limited | Transport & logistics | 2009 |
| Polish Artisan Bakery Boston Ltd | Wholesale & retail | 2021 |
| Polish Saturday Club Limited | Education | 2014 |
| Polish Support Initiative CIC | Professional & scientific | 2024 |
| Ponimax Ltd | Transport & logistics | 2016 |
| Poolside Paws Limited | Arts & recreation | 2025 |
| Popcorn Creative Ltd | Administrative & support | 2025 |
| Poplar Aegis Limited | Wholesale & retail | 2011 |
| Poplar Farm Properties Ltd | Real estate | 2020 |
| Porcher Abrasive Coatings Limited | Manufacturing | 1996 |
| Poros Trans Ltd | Transport & logistics | 2017 |
| Porten Holdings Limited | Real estate | 1963 |
| Posh Corporation Ltd | Real estate | 2024 |
| POV VE Ltd | Administrative & support | 2017 |
| Power Check UK Limited | Real estate | 2003 |
| Power Plant Operational Services Ltd | Professional & scientific | 2022 |
| Powerroad Ltd | Transport & logistics | 2026 |
| Poyntons Consultancy Ltd | Wholesale & retail | 2008 |
| PP Fence Ltd | Manufacturing | 2016 |
| PPN Lincoln Ltd | Administrative & support | 2024 |
| PR Boston Butchers Ltd | Wholesale & retail | 2024 |
| Prasanthy Ltd | Administrative & support | 2023 |
| Precision Plumbing & Heating (Lincs) Ltd | Construction | 2026 |
| Premier Fibreglass Flatroofing Ltd | Construction | 2021 |
| Premier Fibreglass GRP Roofing Ltd | Construction | 2025 |
| Premier HI Ltd | Construction | 2019 |
| Premier Painting Plus Ltd | Construction | 2024 |
| Premier Painting Services Limited | Construction | 2015 |
| Premier Pest Services (Lincs) Limited | Administrative & support | 2007 |
| Premier Workplace Services Limited | Administrative & support | 2025 |
| Premium Paws Limited | Wholesale & retail | 2026 |
| Premsing Theatre Services Ltd | Health & social care | 2011 |
| Pressman House Publishing Limited | Information & communication | 2015 |
| Prestige Flooring Boston Ltd | Wholesale & retail | 2015 |
| Prhc Solutions Ltd | Construction | 2026 |
| Price & Wilson Limited | Real estate | 1981 |
| Pride Magazines Limited | Information & communication | 2012 |
| Pridelands Groundcare Limited | Administrative & support | 2020 |
| Primetime Media Limited | Information & communication | 2009 |
| Priyo Wholesale UK Ltd | Construction | 2026 |
| Pro 8 Autohub Limited | Wholesale & retail | 2022 |
| Pro Hair Boutique Ltd | Wholesale & retail | 2020 |
| Procurement Hacks Limited | Professional & scientific | 2021 |
| Profix Property & Garden Services Ltd | Construction | 2026 |
| Project Holdings by TM Ltd | Real estate | 2023 |
| Prokey Capital Ltd | Real estate | 2024 |
| Prolasma Limited | Construction | 2024 |
| Properties by BAB Ltd | Real estate | 2023 |
| Property Force (UK) Limited | Real estate | 2004 |
| Property Renovations Extensions Services Ltd | Manufacturing | 2025 |
| Prospect Boston Ltd | Hospitality | 2025 |
| Prostar Recycling Ltd | Manufacturing | 2013 |
| Prostar Recycling Machinery Ltd | Extraterritorial | 2017 |
| Protection&Finance Ltd | Financial services | 2022 |
| Provant, Inc. | | 2002 |
| Provenance Living 01 Ltd | Real estate | 2026 |
| Ps.Rimas Ltd | Transport & logistics | 2021 |
| Psath Limited | Health & social care | 2014 |
| Publicity Pens Group Limited | Wholesale & retail | 2016 |
| Publicserve Solutions Ltd | Wholesale & retail | 2025 |
| Pure 121 Spice Ltd | Hospitality | 2024 |
| Pure Windows and Doors Ltd | Construction | 2025 |
| Purelet Estate Ltd | Real estate | 2025 |
| Purple Lake Health Care Ltd | Health & social care | 2021 |
| Pushchair Expert Limited | Wholesale & retail | 2018 |
| Pvcp Highvista GP LP | | 2021 |