| Ontech Solutions Ltd | Information & communication | 2007 |
| Open Life Science Limited | Education | 2020 |
| Opencar Ltd | Wholesale & retail | 2022 |
| Optimus Transport Services Ltd | Transport & logistics | 2024 |
| Orangehouse Renewables Limited | Construction | 2008 |
| Orchid Consultants Ltd | Professional & scientific | 2025 |
| OUT of the Box Mysteries Ltd | Arts & recreation | 2023 |
| Outsourcers Hive Limited | Information & communication | 2022 |
| Ovenbrite Ltd | Administrative & support | 2022 |
| P & L Hayes (Farms) Limited | Agriculture & fishing | 2013 |
| P & S Auto Sales Ltd | Wholesale & retail | 2010 |
| P R P Catering Ltd | Hospitality | 2019 |
| Palmers Heating & Plumbing Limited | Construction | 2019 |
| Paradise Advisory Ltd | Professional & scientific | 2022 |
| Park Lodge Retirement Homes Limited | Health & social care | 2009 |
| Patricius Strategy & Technology Consultancy Ltd | Information & communication | 2026 |
| Pawnbrokers Gold (March) Limited | Wholesale & retail | 2009 |
| Payella Limited | Information & communication | 2017 |
| Paynes of Chatteris Limited | Construction | 2007 |
| Pcml Cambridge Limited | Administrative & support | 2015 |
| Pcml Holdings Limited | Administrative & support | 2015 |
| Pcml Oxford Limited | Administrative & support | 2015 |
| PCX Commercial Cleaning Ltd | Administrative & support | 2023 |
| Peaceful Leaves Ltd | Wholesale & retail | 2024 |
| Penn Property Developments Limited | Information & communication | 2024 |
| Penthouse Plumbing & Heating Limited | Construction | 2022 |
| Penthouse Properties & Lettings Limited | Real estate | 2023 |
| People in Step Ltd | Professional & scientific | 2006 |
| Petary Ltd | Agriculture & fishing | 1998 |
| Peter Rice Reptiles Limited | Extraterritorial | 2015 |
| Petra Grace Limited | Health & social care | 2013 |
| Phil Brannigan Groundworks Limited | Construction | 2014 |
| Phil Purse Construction Ltd | Construction | 2018 |
| Phillips Hobbies Limited | Wholesale & retail | 2023 |
| Phoenix Hair & Beauty Specialists Limited | Real estate | 2002 |
| Piticot Limited | Professional & scientific | 2015 |
| Planters by G&S Limited | Manufacturing | 2025 |
| Platinum Business Park Management Company Limited | Households | 2022 |
| Plusplumb Limited | Wholesale & retail | 2019 |
| Polite Associates Ltd. | Health & social care | 2009 |
| Polleysport Limited | Extraterritorial | 2014 |
| Porcelli Holdings Limited | Manufacturing | 2008 |
| Porter Distribution Ltd | Wholesale & retail | 2023 |
| Porter Lawrence Property Limited | Construction | 2022 |
| Postland Estates Limited | Construction | 2020 |
| Precise Component Manufacture Limited | Manufacturing | 1996 |
| Premier Boiler Services Limited | Construction | 2003 |
| Prestige Fire Solutions Ltd | Administrative & support | 2011 |
| Prestige Giftware Ltd | Wholesale & retail | 2015 |
| Prestige Pipelaying JV Ltd | Energy | 2019 |
| Prestige Pipelaying Ltd | Professional & scientific | 2017 |
| Prestige Property and Developments Ltd | Real estate | 2023 |
| Prince-Epal Ltd | Extraterritorial | 2011 |
| Principle Construction and Maintenance Ltd | Construction | 2019 |
| Pro Clean Xtreme Ltd | Administrative & support | 2019 |
| Pro Sports Group Ltd | Wholesale & retail | 2024 |
| Proberry Ltd | Real estate | 2020 |
| Produce Investments Limited | Professional & scientific | 2005 |
| Produce Solutions Ltd | Agriculture & fishing | 2015 |
| Progressive Accounting Solution Services Ltd | Financial services | 2024 |
| Project Lifecycle Services Limited | Professional & scientific | 2006 |
| Projexx Property Group Ltd | Real estate | 2025 |
| Property National Ltd | Real estate | 2015 |
| Protek Design Limited | Manufacturing | 2020 |
| PSK Global Ltd | Administrative & support | 2016 |
| Puppy Choices Ltd | Wholesale & retail | 2018 |
| Purechalk Ltd | Arts & recreation | 2021 |
| PW Property Group Ltd | Real estate | 2025 |
| PWF Properties Ltd | Real estate | 2023 |
| Qualitetch Components Limited | Manufacturing | 1990 |
| Qualitex Holdings Limited | Financial services | 2024 |
| Qualitex Hygiene Services Ltd | Administrative & support | 2003 |
| Qualitex Property Limited | Real estate | 2024 |
| Quality Precepts Limited | Professional & scientific | 2018 |
| Quality Solutions (Technology) Limited | Professional & scientific | 2009 |
| Quietmind.Io Ltd | Information & communication | 2016 |
| QUY Financial Services Limited | Other services | 2004 |
| R a Paul Ltd | Transport & logistics | 2025 |
| R C Productions Ltd | Information & communication | 1999 |
| R F Manchett & Co Limited | Agriculture & fishing | 2007 |
| R F Manchett Holdings Limited | Professional & scientific | 2007 |
| R G D Plastering Ltd | Construction | 2019 |
| R Skoulding & Sons Ltd | Real estate | 2020 |
| R.B.Johnson & Co.Limited | Wholesale & retail | 1929 |
| Rainbow Conversions Ltd | Wholesale & retail | 2003 |
| Rambo Rigging Ltd | Construction | 2023 |
| Ramsey Outside Catering Co. Limited | Real estate | 1976 |
| Rashed & Adamczyk Pathology Limited | Health & social care | 2019 |
| Raven Farms Limited | Agriculture & fishing | 1992 |
| Razvan GM Services Ltd | Professional & scientific | 2025 |
| RB Medical Aesthetics Limited | Health & social care | 2021 |
| Recyplas Limited | Manufacturing | 2012 |
| Red Sun Takeaway Limited | Hospitality | 2018 |
| Reekie Root Systems Ltd | Professional & scientific | 2024 |
| Regal Field Management Company Limited | Households | 2021 |
| Remo Social Enterprise Ltd. | Water & waste | 2005 |
| Renewable Material Solutions Ltd | Professional & scientific | 2012 |
| Resolve Engineering Limited | Manufacturing | 2026 |
| Restrain Company Limited | Agriculture & fishing | 2004 |
| Retrocoat Ltd | Construction | 2025 |