| Oretol Group Limited | Real estate | 2022 |
| Oretol Holdings Limited | Real estate | 2023 |
| Orient Blubarco Shipping Services Limited | Transport & logistics | 2016 |
| Orthovet Limited | Professional & scientific | 2022 |
| Otthershaw (Linden & Bovis) Management Company Limited | Households | 2023 |
| Otto&Bek Ltd | Construction | 2021 |
| Oursolutions Ltd | Information & communication | 2022 |
| Oxford Land Limited | Professional & scientific | 1986 |
| P and P Electrical Group Limited | Construction | 2018 |
| P Cripps Limited | Construction | 2011 |
| P M S S Academy of Advanced Manufacturing Ltd | Education | 2025 |
| Page-Johnson Properties Limited | Professional & scientific | 1954 |
| Paladin Protection Limited | Administrative & support | 2012 |
| Palms Salon Ltd | Other services | 2025 |
| Paper to Piece Ltd | Arts & recreation | 2024 |
| PAR Vending LLP | | 2017 |
| Paradigm Business Solutions Limited | Wholesale & retail | 2023 |
| Parakeet Media Ltd | Arts & recreation | 2022 |
| Paramount Plumbing & Drainage Limited | Construction | 2021 |
| Paramount Products Limited | Manufacturing | 2015 |
| Parekh Consulting Limited | Financial services | 2012 |
| Park South Residences Limited | Real estate | 1955 |
| Parkdale Capital Limited | Professional & scientific | 2022 |
| Parker & Co Properties Limited | Other services | 2022 |
| Parker Inc. Limited | Real estate | 2025 |
| Parkfoot Garage Limited | Wholesale & retail | 1958 |
| Parkinson Moore Travel Group Ltd | Administrative & support | 2025 |
| Parkinson Travel Ltd | Administrative & support | 2026 |
| Parkmead Management Limited | Households | 1969 |
| Parkview Support Ltd | Construction | 2019 |
| Parrott and Partners Limited | Real estate | 2022 |
| Parsons Place Management Company Limited | Households | 2023 |
| Patch Purple Limited | Professional & scientific | 2023 |
| Pattinson Consultancy Limited | Financial services | 2017 |
| Paul Kemp Copywriting Limited | Professional & scientific | 2007 |
| Pauline Neve & Associates Ltd | Financial services | 2003 |
| PAW Help International CIC | Other services | 2026 |
| Pawprintsinthewild Ltd | Professional & scientific | 2025 |
| PAY Green Ltd | Administrative & support | 2025 |
| PB Elite Lifting Limited | Manufacturing | 2023 |
| PBG Trustees Limited | Professional & scientific | 1990 |
| PCI Management Services Ltd | Construction | 2024 |
| PDM Projects Limited | Professional & scientific | 2020 |
| Peak Lift Services Ltd | Construction | 2024 |
| Pearsall Place Management Company Limited | Households | 2017 |
| Peaty Mills PLC | Wholesale & retail | 1979 |
| Peddling Ltd | Wholesale & retail | 2024 |
| Peel Hall JV LLP | | 2022 |
| Peersurance Limited | Financial services | 2024 |
| Pembers LLP | | 2017 |
| Penate Solutions Limited | Wholesale & retail | 2025 |
| Penelope Taylor Advanced Aesthetics Ltd | Other services | 2019 |
| Pension Compass Ltd | Financial services | 2026 |
| Pepperhomies Limited | Hospitality | 2023 |
| Perchpoint Ltd | Professional & scientific | 2025 |
| Percy Verance Limited | Administrative & support | 2013 |
| Perrys Accountants UK LLP | | 2009 |
| Perrys Secretaries Limited | Administrative & support | 2009 |
| Petasos Trading Limited | Real estate | 1994 |
| Peter Shelley Residential Sales Limited | Real estate | 2017 |
| Pfera Hall Limited | Health & social care | 2001 |
| Pharaoh Barbers Ltd | Other services | 2024 |
| Philanthropy Consulting Limited | Administrative & support | 2019 |
| Philanthropy I Limited | Education | 2019 |
| Phoenix Club Cromwell Limited | Real estate | 2025 |
| Phoenix Paving and Roofing Ltd | Construction | 2025 |
| Phoenix Running West Sussex Ltd | Arts & recreation | 2024 |
| PI Digital Technologies Ltd | Information & communication | 2019 |
| Pilgrim Estates Ltd | Construction | 2019 |
| Pinata Media Limited | Administrative & support | 2013 |
| Pinnacle Groundworks Ltd | Construction | 2017 |
| Pinnacle Payment Consulting Limited | Professional & scientific | 2015 |
| Pinnacle Training International Ltd | Professional & scientific | 2022 |
| Pipd Consulting Ltd | Professional & scientific | 2022 |
| Pipeknights Ltd | Construction | 2025 |
| Pirouette Partners Ltd | Professional & scientific | 2020 |
| PIT Pro Ltd | Wholesale & retail | 2019 |
| Pivoting Minds Ltd | Professional & scientific | 2024 |
| Pixalart Limited | Information & communication | 2009 |
| Pixelvet Limited | Professional & scientific | 2015 |
| Pixono Ltd | Information & communication | 2015 |
| PJB GAS & Heating Ltd | Construction | 2016 |
| Placepoint Development One LLP | | 2025 |
| Placepoint Housing Partnership (Funding) LLP | | 2025 |
| Placepoint Housing Partnership (SPV) Limited | Financial services | 2025 |
| Placepoint Housing Partnership LLP | | 2025 |
| Plan T Investments Ltd | Real estate | 2025 |
| Planet Merch LLP | | 2019 |
| Plans by Park Ltd | Professional & scientific | 2020 |
| Platform Lift Engineers Limited | Construction | 2009 |
| Players Cars Premium Ltd | Wholesale & retail | 2024 |
| Plimsoll Holdings Limited | Financial services | 2021 |
| Plot Partners Ltd | Construction | 2025 |
| Plumble Heating & Renewables Limited | Construction | 2024 |
| PM Lighting Media Ltd | Information & communication | 2018 |
| PMA Management Company Ltd | Real estate | 2017 |
| PMO Support Solutions Limited | Professional & scientific | 2013 |
| PMS (Property Management Services) Ltd | Real estate | 2012 |
| Popat Leisure Limited | Wholesale & retail | 1998 |
| Populo Marketing Limited | Information & communication | 2014 |