| Orford Court RTM Company Ltd | Households | 2023 |
| Osprey Infosec Services Ltd | Information & communication | 2010 |
| OTC Lettings Limited | Real estate | 2024 |
| OV Maintenance Limited | Construction | 2020 |
| Ovactech Limited | Information & communication | 2022 |
| Owen Holdings Limited | Professional & scientific | 2015 |
| Owlstoneaccounting LLP | | 2026 |
| P & H Consulting Limited | Financial services | 2012 |
| P Salter Electrical Ltd. | Energy | 2017 |
| P&D Auto Refinish Ltd | Wholesale & retail | 2026 |
| P.D.H. Conversions Ltd | Construction | 2013 |
| Pacey Land Limited | Construction | 2011 |
| Pacific Trident Global Ltd | Professional & scientific | 2025 |
| PAD Ecology Limited | Professional & scientific | 2023 |
| Paddy Mchale Construction Limited | Extraterritorial | 2008 |
| Pamber Heath Consultancy Limited | Professional & scientific | 2024 |
| Pamber Peak Property Limited | Real estate | 2023 |
| Pamber Plumbers Ltd | Construction | 2007 |
| Pamberend Green Ltd | Real estate | 2023 |
| Pampam Caring Services Ltd | Health & social care | 2021 |
| Paragon Property Owners Ltd | Real estate | 2025 |
| Parkers Engineering Limited | Manufacturing | 2001 |
| Pathmalt Limited | | 1988 |
| PBC Plant Limited | Water & waste | 2016 |
| PDR Pubs Ltd | Hospitality | 2023 |
| Pearl & Co UK Ltd | Wholesale & retail | 2022 |
| Pedley Funerals Ltd | Other services | 2021 |
| Pelletier's Trinkets Ltd | Wholesale & retail | 2021 |
| Peperonata Ltd | Manufacturing | 2014 |
| Performance Sound & Light Ltd. | Information & communication | 2014 |
| Perkins Healthcare Solutions Ltd | Health & social care | 2024 |
| Perkista Ltd | Manufacturing | 2024 |
| Pertek Limited | Information & communication | 2006 |
| Petnap Limited | Wholesale & retail | 2013 |
| PF Welding Services Limited | Manufacturing | 2016 |
| Pharma Knowledge Group Ltd | Information & communication | 2018 |
| PHI Nail Bar Limited | Other services | 2024 |
| Philbert Construction Ltd | Construction | 2019 |
| Philp Investments Limited | Financial services | 2025 |
| Phire Ltd | Administrative & support | 2005 |
| Phoenix FX Enterprise Ltd | Professional & scientific | 2020 |
| Pigmodding Limited | Wholesale & retail | 2023 |
| Pineapple Consulting Services Ltd | Wholesale & retail | 2015 |
| Pitt Hall Barn Ltd | Hospitality | 2013 |
| PJL Group Limited | Agriculture & fishing | 2013 |
| PJS Holdings (Southern) Limited | Financial services | 2023 |
| PJS Mechanical & Electrical Building Services Limited | Construction | 2003 |
| Plan 2 Project Solutions Limited | Professional & scientific | 2008 |
| Plan B Technology Limited | Manufacturing | 2012 |
| Plantation Farm Ltd | Agriculture & fishing | 2010 |
| PLOT34ACHILLIS Limited | Manufacturing | 2019 |
| Plumbing PP Ltd | Construction | 2024 |
| PNP Creative Studios Ltd | Information & communication | 2025 |
| Pocket Brilliance Limited | Information & communication | 2019 |
| Polly Moore Homes Limited | Real estate | 2014 |
| Pomroy Properties Ltd | Real estate | 2023 |
| Power on Bikes Limited | Wholesale & retail | 2024 |
| PPH Coaches Limited | Transport & logistics | 2007 |
| Precious Petals Limited | Wholesale & retail | 2003 |
| Precision Leadwork and Roofing Services Limited | Construction | 2018 |
| Precision Pools Ltd | Construction | 2016 |
| Prestige Management Solutions Limited | Construction | 2009 |
| Prestige Properties Management Limited | Real estate | 2023 |
| Pretty Women's Club Limited | Professional & scientific | 2025 |
| Pride Combat Athletics Ltd | Arts & recreation | 2018 |
| Primacy Cheer Ltd. | Manufacturing | 2015 |
| Primeedge Home Care Ltd | Administrative & support | 2026 |
| Priority One (Service Management) Limited | Information & communication | 2013 |
| Pristine Pups Ltd | Other services | 2015 |
| Process & Project Solutions Ltd | Professional & scientific | 2022 |
| Profascias Ltd. | Construction | 2014 |
| Promotionsonly Group UK Limited | Wholesale & retail | 2011 |
| Promotionsonly Limited | Wholesale & retail | 2007 |
| Property Joint Consultancy Ltd | Real estate | 2023 |
| Property Joint Investments (One) Ltd | Real estate | 2017 |
| Property Joint Investments (Two) Ltd | Real estate | 2019 |
| Property Joint Ltd | Real estate | 2016 |
| PS Contract Management Ltd | Construction | 2014 |
| PSL Live Ltd | Arts & recreation | 2020 |
| PTG Scaffolding Limited | Construction | 2015 |
| Puppy Academy Ltd | Education | 2019 |
| Puretime Ltd | Wholesale & retail | 2025 |
| Quality Quest Limited | Professional & scientific | 2005 |
| Quattro Water Solutions Ltd | Professional & scientific | 2025 |
| R. & N.R. Consulting Limited | Professional & scientific | 2000 |
| RA Consultancy Services Ltd | Professional & scientific | 2025 |
| Radiance Beauty & Aesthetics Ltd | Other services | 2017 |
| Rainbow Lighthouse Solutions Ltd | Wholesale & retail | 2025 |
| Rangers Direct Ltd | Wholesale & retail | 2025 |
| RDF PPM Ltd | Construction | 2019 |
| REA Software Limited | Information & communication | 2013 |
| Reading Recycling Limited | Water & waste | 2015 |
| Rectory Lane Water Ltd | Water & waste | 2019 |
| Red Blazer Productions Ltd | Information & communication | 2020 |
| Reign Therapeutic Provision Ltd | Education | 2026 |
| Remmy's Crown Ltd | Administrative & support | 2026 |
| Remotely Piloted Aircraft Systems Limited | Wholesale & retail | 2012 |
| Respite Tea Co. Limited | Manufacturing | 2021 |
| Respondr Ltd | Professional & scientific | 2025 |
| Revilo Roofing Ltd | Construction | 2025 |