| Oxygenz Ltd | Wholesale & retail | 2025 |
| Oxypure Limited | Other services | 2020 |
| Oyin X FAB Ltd | Manufacturing | 2021 |
| Oyster Recruitment Limited | Administrative & support | 2019 |
| Oysterback Consulting Limited | Information & communication | 2011 |
| Ozanzo Ltd | Information & communication | 2025 |
| Ozgur Properties LLP | | 2026 |
| Ozytherionyx Ltd | Professional & scientific | 2025 |
| Ozzies Big Breakfast Limited | Hospitality | 2025 |
| P & C Mulligan Ltd | Real estate | 2026 |
| P & C(Insurance Brokers) Limited | Financial services | 1997 |
| P & D Casemaking Limited | Administrative & support | 2012 |
| P & J Okeford Fitzpaine Ltd | Construction | 2014 |
| P & K Electrical (Southern) Limited | Construction | 2007 |
| P & K Panelworks Limited | Wholesale & retail | 2011 |
| P B Estates (Spain) Ltd | Real estate | 2026 |
| P J M Properties (Dorset) Limited | Extraterritorial | 2016 |
| P L H Property Investment Limited | Real estate | 1987 |
| P M a Developments Ltd | Construction | 2012 |
| P&D Civils Ltd | Construction | 2019 |
| P&H Rosol Limited | Health & social care | 2019 |
| P&S Art Co Limited | Wholesale & retail | 2016 |
| P-Four FT Associates Ltd | Professional & scientific | 2024 |
| P-Four FT Investments Ltd | Financial services | 2024 |
| P. Charman Limited | Construction | 2012 |
| P. E. Barton (Holdings) Ltd | Financial services | 2013 |
| P.H. Composites Limited | Other services | 2022 |
| P.W.B. (Industrial Heating) Service Limited | Manufacturing | 1987 |
| P3BBLE Ltd | Financial services | 2023 |
| PA Project Management Services Limited | Administrative & support | 2007 |
| Pacific Flooring Limited | Construction | 2018 |
| Pack'D Ltd | Manufacturing | 2014 |
| Packline Limited | Other services | 1993 |
| Packline Materials Handling Ltd | Other services | 2010 |
| Paddington Care Ltd | Health & social care | 2019 |
| Padel Social Dorset Ltd | Education | 2026 |
| Padmer Solutions Ltd | Administrative & support | 2017 |
| Paen Logistics Limited | Transport & logistics | 2024 |
| Pafou Ltd | Extraterritorial | 2023 |
| Page Automotive Group Limited | Wholesale & retail | 2015 |
| Page Hire and Leasing Limited | Wholesale & retail | 2015 |
| Page Projects Limited | Construction | 2016 |
| Page-Roberts Automotive Limited | Manufacturing | 2019 |
| Page-Roberts Holdings Ltd | Financial services | 2015 |
| Pagestead Enterprises Limited | Information & communication | 2023 |
| Paint Services Group Limited | Extraterritorial | 1947 |
| Paintshop Studio Limited | Professional & scientific | 2007 |
| Paint’N’Play by Shay Ltd | Arts & recreation | 2026 |
| Pakshilajit Ltd | Wholesale & retail | 2021 |
| Palace Street Capital Management LLP | | 2015 |
| Pallium Software Limited | Information & communication | 2025 |
| Palmer Noles Limited | Real estate | 2024 |
| Palmer Pharma Ltd | Health & social care | 2023 |
| Pambry Instruments Limited | Manufacturing | 2024 |
| Pamira Limited | Manufacturing | 2001 |
| Pamoja Advisory Limited | Professional & scientific | 2026 |
| Pamoja Energy Limited | Extraterritorial | 2021 |
| Pamoja Mining Limited | Professional & scientific | 2021 |
| Pamoja Resources Group Limited | Financial services | 2021 |
| Panda Intelligence Software Ltd | Wholesale & retail | 2025 |
| Panda VFX Ltd | Information & communication | 2023 |
| Pandorra Ltd. | Wholesale & retail | 2015 |
| Panel House Ltd | Wholesale & retail | 2026 |
| Panel Mule Ltd | Extraterritorial | 2025 |
| Pangeae Limited | Extraterritorial | 2000 |
| Panic and Disgust Ltd. | Information & communication | 2015 |
| Panlura Ltd | Wholesale & retail | 2025 |
| Panthari MM Limited | Wholesale & retail | 2025 |
| Pantheon UK Solutions Ltd | Professional & scientific | 2025 |
| Paper and Scissors Ltd | Professional & scientific | 2018 |
| Papua Partners Limited | Extraterritorial | 2005 |
| Parable Trust Limited | Professional & scientific | 2005 |
| Paradigm Learning Business Simulations (UK) Limited | Public administration | 2016 |
| Paradigm Printworks Ltd | Wholesale & retail | 2024 |
| Paradise Bournemouth Limited | Arts & recreation | 2007 |
| Paradox General Builders Ltd | Construction | 2023 |
| Paraestra UK Ltd | Arts & recreation | 2019 |
| Parallax Thinking Ltd | Professional & scientific | 2025 |
| Paramus Ltd | Administrative & support | 2022 |
| Parc Land Investment Limited | Real estate | 2014 |
| Parcel Pouch Ltd | Manufacturing | 2025 |
| Parcels Plus Ltd | Wholesale & retail | 2026 |
| Parent Carers Together (BCP) CIC | Information & communication | 2023 |
| Parhelion Systems Ltd | Information & communication | 2016 |
| Paris Créatif Ltd | Information & communication | 2024 |
| Paris-George Catacos Ltd | Professional & scientific | 2025 |
| Park Close (Poole) Management Company Limited | Professional & scientific | 2009 |
| Park Cottage Dental Practice Limited | Health & social care | 2011 |
| Park Mansions Flat Management Limited | Households | 1979 |
| Park Place Properties Limited | Real estate | 2018 |
| Park Place Training Limited | Real estate | 1988 |
| Park View (SH) RTM Company Limited | Households | 2015 |
| Park View Church Road Management Company Ltd | Extraterritorial | 2015 |
| Park View Court (Poole) Limited | Households | 1962 |
| Park View Springbourne Ltd | Households | 2023 |
| Park Vista RTM Company Ltd | Households | 2023 |
| Parker Composites Ltd | Manufacturing | 2019 |
| Parker Dawe Collective Limited | Professional & scientific | 2023 |
| Parker Group Management Limited | Professional & scientific | 2025 |
| Parker Group Properties Limited | Real estate | 2025 |