| Orchid Moon Organics Ltd | Wholesale & retail | 2025 |
| ORM Enterprises Limited | Extraterritorial | 2024 |
| Osbourne Originals Limited | Manufacturing | 2023 |
| Othelion Holdco Ltd | Financial services | 2026 |
| Othelion Ipco Ltd | Administrative & support | 2026 |
| Othelion Ltd | Information & communication | 2026 |
| Othello Consultants Limited | Information & communication | 1999 |
| Ottosam Design Ltd | Professional & scientific | 2022 |
| Outer Limits Geophysics LLP | | 2014 |
| OUTSOURCING4YOU Limited | Professional & scientific | 2003 |
| Overlay Solutions Ltd | Construction | 2025 |
| P & L Blinds Ltd | Manufacturing | 2018 |
| P & S Ground Works Limited | Construction | 2017 |
| P2 Developments Ltd | Construction | 2026 |
| P7 Consulting Ltd | Professional & scientific | 2023 |
| PAC Communications Ltd | Professional & scientific | 2005 |
| Palace International Limited | Professional & scientific | 1995 |
| Palacegate and Barn Management Limited | Households | 2018 |
| Palmarium Properties Limited | Construction | 2007 |
| Pamela Haven C.I.C. | Health & social care | 2021 |
| Panda Products Limited | Wholesale & retail | 2019 |
| Paragon Automotive Logistics Ltd | Transport & logistics | 2003 |
| Paramount Pools Limited | Wholesale & retail | 1979 |
| Park Farm Trading Ltd | Construction | 2016 |
| Parral Limited | Administrative & support | 1989 |
| Pathway Sales & Marketing Limited | Wholesale & retail | 2025 |
| Paton Retail Services Ltd | Wholesale & retail | 2026 |
| Pattern Associates Limited | Professional & scientific | 2003 |
| Paul Hancock CSS Limited | Administrative & support | 2026 |
| Pawsey LOW Holdings Ltd | Financial services | 2026 |
| PBT Group (UK) Limited | Information & communication | 2016 |
| PDK AV Limited | Professional & scientific | 2017 |
| Peabody Engineering (NO. 2) Limited | Professional & scientific | 1910 |
| Peapod Catering Limited | Hospitality | 2019 |
| Pegasus Properties (Odiham) Limited | Real estate | 2016 |
| Penagar Limited | Real estate | 1983 |
| Penka the Goat Ltd | Extraterritorial | 2026 |
| Pennine Metals B Limited | Financial services | 2010 |
| Perfect Octave Limited | Administrative & support | 2017 |
| Perfect Property Group Limited | Real estate | 2025 |
| Peri-Peri Grill Hook Ltd | Hospitality | 2020 |
| Periscope Music & Media Ltd | Information & communication | 2011 |
| Perku Limited | Information & communication | 2023 |
| Perspectives Limited | Extraterritorial | 2009 |
| Pestforce (West London) Limited | Administrative & support | 2015 |
| Pestforce Southampton Limited | Administrative & support | 2022 |
| Peter Goddard & Co Limited | Professional & scientific | 2010 |
| PG Broom Consulting Ltd | Professional & scientific | 2013 |
| Pharma Quality Partners Ltd | Professional & scientific | 2013 |
| Phaze Electrical PAT Testing Ltd | Professional & scientific | 2025 |
| Phdh Ltd | Professional & scientific | 2006 |
| Philip Walsh Associates Ltd | Information & communication | 2023 |
| Phoenix Green Garage Limited | Wholesale & retail | 2010 |
| Phoenix Management Consultancy Limited | Professional & scientific | 2025 |
| Phoenix Processing Engineering Limited | Professional & scientific | 2018 |
| Phoenix Roleplays Ltd | Manufacturing | 2023 |
| Picardy Partnership LLP | | 2016 |
| PICKLEBALL4U Ltd | Education | 2024 |
| Pilates & Training Ltd | Arts & recreation | 2025 |
| Pinch Studios Limited | Professional & scientific | 2013 |
| Pines Plumbing & Heating Limited | Construction | 2015 |
| Pink Pictures Limited | Information & communication | 2006 |
| Pinnacle Care Group Limited | Health & social care | 2024 |
| Pinnacle Care Homes ( Dorchester) Limited | Health & social care | 2024 |
| Pinnacle Care Homes Limited | Health & social care | 2021 |
| Pinnacle Care Homes Sussex Limited | Health & social care | 2024 |
| Pinzameld Limited | Professional & scientific | 2016 |
| PKC Sales and Marketing Limited | Professional & scientific | 2019 |
| Plain Thinking Limited | Professional & scientific | 2024 |
| Planet JED Ltd | Extraterritorial | 2023 |
| Plasma Quest Limited | Professional & scientific | 1998 |
| Platane Limited | Construction | 2004 |
| Plenitus Construction Services Limited | Construction | 2017 |
| Plot 11 Limited | Information & communication | 2017 |
| PO WAH 2018 Ltd | Hospitality | 2018 |
| Pointbreak Advisory Ltd | Professional & scientific | 2026 |
| Polsapart Ltd | Construction | 2010 |
| Polyethylene Pipelines Company Limited | Construction | 1964 |
| Pool & Sons (Hartley Wintney) Limited | Construction | 2010 |
| Poplar Close 1957 Limited | Extraterritorial | 2013 |
| Poppy Eleanor Ltd | Manufacturing | 2026 |
| Porters Carpet and Flooring Limited | Construction | 2019 |
| Porters PHS Ltd | Construction | 2026 |
| Powell Forestry Limited | Agriculture & fishing | 2018 |
| Powerwave Energy Limited | Administrative & support | 2008 |
| PPC (Transport) Limited | Transport & logistics | 2017 |
| PPC Group Holdings Limited | Real estate | 2022 |
| Pqdigital Limited | Professional & scientific | 2023 |
| PQL Designs Ltd | Professional & scientific | 2019 |
| PRD Technologies Limited | Information & communication | 2006 |
| Premier Carpentry Services Limited | Construction | 2019 |
| Premium Enterprises Limited | Financial services | 1984 |
| Present Aspiration Ltd | Education | 2015 |
| Prestige Electrical (UK) Limited | Construction | 2011 |
| Prestige Swimming Pools Limited | Construction | 2010 |
| Prime Coffee Ltd | Hospitality | 2003 |
| Prince Albert Barn Limited | Real estate | 2022 |
| Prince Roofing Limited | Construction | 2021 |
| Priority Properties North West Limited | Real estate | 2005 |
| Pro Autocars Ltd | Wholesale & retail | 2020 |