| Pelson Limited | Administrative & support | 2025 |
| Pemberton and Whitefoord Design Ltd | Professional & scientific | 2026 |
| Penguin Training Solutions Ltd | Education | 1995 |
| Penhaligon Partners Limited | Professional & scientific | 2024 |
| Pennell & Sons Limited | Wholesale & retail | 1936 |
| Pennell's Estates Limited | Wholesale & retail | 1928 |
| Pennells Brough Park Limited | Financial services | 2025 |
| Pennells Farming Limited | Agriculture & fishing | 2025 |
| Pennells Garden Centres Limited | Financial services | 2025 |
| Penoir Associates Ltd | Transport & logistics | 2018 |
| Pentangle Automation Limited | Professional & scientific | 2017 |
| Pentire Holdings Ltd | Financial services | 2020 |
| People First Education Limited | Education | 2007 |
| Pepis Lincoln Limited | Hospitality | 2023 |
| PER Ardua Performance Ltd | Education | 2026 |
| Perform Lincs Ltd | Arts & recreation | 2024 |
| Performance, Training and Development Ltd | Administrative & support | 2010 |
| Perigon RE Holdings (UK) Limited | Financial services | 2024 |
| Perigon RE Risk Services Limited | Financial services | 2024 |
| Perks Plumbing & Heating Limited | Construction | 2012 |
| Perry's Pumps Limited | Construction | 2004 |
| Perspective Advisory Limited | Professional & scientific | 2009 |
| Perspective Software Limited | Information & communication | 2000 |
| Pet Behaviour Company Limited | Other services | 2025 |
| Pet Cuisine Limited | Manufacturing | 2013 |
| Petar Hitev Ltd | Professional & scientific | 2017 |
| Petaurum Limited | Extraterritorial | 2014 |
| Petaurum Solutions Limited | Administrative & support | 2012 |
| Pete Welch Ltd | Professional & scientific | 2021 |
| Peter Langley Engineering Design Limited | Information & communication | 1997 |
| Peter LE Marchant Trust | Arts & recreation | 2013 |
| Peter Mcdonald Surgical Services Ltd | Health & social care | 2012 |
| Peter Moulds Farmers Limited | Agriculture & fishing | 1969 |
| Peter Robinson Orthopaedics Ltd | Health & social care | 2023 |
| Peter Samms (Equipment) Limited | Other services | 1978 |
| Peters Financial Ltd | Financial services | 2018 |
| Petite Properties Limited | Manufacturing | 2004 |
| Pets and Lets Limited | Financial services | 2021 |
| Petsek Limited | Wholesale & retail | 2024 |
| Petwood Farming Co.(Woodhall)Limited | Agriculture & fishing | 1957 |
| PFB Consulting Limited | Professional & scientific | 2020 |
| PGS Consultants Ltd | Professional & scientific | 2015 |
| PH Advisory Ltd | Administrative & support | 2025 |
| PH Engineering Solutions Ltd | Professional & scientific | 2011 |
| PH Interim Limited | Professional & scientific | 2012 |
| Pharmagen Land Holdings Limited | Real estate | 1999 |
| Pharmsure International Limited | Professional & scientific | 2013 |
| PHI Ltd | Professional & scientific | 2022 |
| Phibit Ltd | Information & communication | 2026 |
| Phil Gilchrist ( House Maintenance) Ltd | Administrative & support | 2003 |
| Philip Andrew Christopher Limited | Extraterritorial | 2024 |
| Philip Bloom Ltd | Health & social care | 2011 |
| Philip John Gray Limited | Extraterritorial | 2024 |
| Philip Ward Limited | Construction | 2012 |
| Philips in Lighting Limited | Wholesale & retail | 2018 |
| Phillips Novejarque Ltd | Health & social care | 2024 |
| Philomena's Accountants & Tax Consultants Ltd | Professional & scientific | 2011 |
| PHO Huynh Limited | Hospitality | 2019 |
| Phoenix Chimney Sweep Ltd | Administrative & support | 2025 |
| Phoenix Fm(Uk) Limited | Administrative & support | 2012 |
| Phoenix Global Education Ltd | Education | 2025 |
| Phoenix Kitchens Limited | Manufacturing | 2003 |
| Phoenix Rising EST 2024 Ltd. | Professional & scientific | 2024 |
| Phones & More Ltd | Wholesale & retail | 2024 |
| Photo-Dialogue Limited | Professional & scientific | 2003 |
| Photobomber Ltd | Extraterritorial | 2023 |
| Photography 19 Ltd | Professional & scientific | 2016 |
| Photography UK Limited | Professional & scientific | 2023 |
| Photon Applications Limited | Administrative & support | 1987 |
| Phyllida Pritchard Psychology Limited | Education | 2021 |
| Physiosite Ltd | Health & social care | 2025 |
| Physis Data Limited | Information & communication | 2017 |
| Phytolux Limited | Wholesale & retail | 2012 |
| Piccaso Ltd | Information & communication | 2022 |
| Pick Vintage Wholesale Ltd | Wholesale & retail | 2021 |
| Pickel Limited | Financial services | 2018 |
| Picker Engineering Services Ltd | Professional & scientific | 2021 |
| Pickering Park (Plot 1) Management Company Limited | Real estate | 2023 |
| Pickering Park (Plot 2) Management Company Limited | Real estate | 2024 |
| Pickering Park (Site) Management Company Limited | Real estate | 2023 |
| Pickle Property Development Limited | Households | 2024 |
| Picks Butchers Limited | Wholesale & retail | 2000 |
| Pickwell Paving Ltd | Construction | 2025 |
| Pickzy Ltd | Wholesale & retail | 2025 |
| Piece Into Peace Limited | Health & social care | 2022 |
| Pilkington Hett Associates Ltd | Health & social care | 2009 |
| Pillai Ward Ltd | Real estate | 2021 |
| Pilsdonpen Consultancy Ltd | Professional & scientific | 2026 |
| Pilsdonpen Holdings Ltd | Financial services | 2026 |
| PIM Systems Ltd | Information & communication | 2012 |
| Pinchbeck Marketing & Advisory Limited | Administrative & support | 2025 |
| Pink Gnome Cleaning Service Ltd | Administrative & support | 2024 |
| Pinnacle (Lincs) Limited | Construction | 2014 |
| Pinnacle Quantity Surveying Ltd | Professional & scientific | 2026 |
| PIP Littlewood Ltd | Other services | 2014 |
| PIP Properties Limited | Real estate | 2021 |
| Pipe Tool Specialists Limited | Wholesale & retail | 1964 |
| Pipe Tool Specialists Trustee Limited | Professional & scientific | 2025 |
| Pipe Tools Limited | Extraterritorial | 2008 |
| Pipeline Construction Management Ltd | Construction | 2012 |