| PRC Enterprises Ltd | Real estate | 1990 |
| Premier Advisers UK Limited | Professional & scientific | 2013 |
| Premier Food Solutions Ltd | Manufacturing | 2015 |
| Premier Form Tools Limited | Manufacturing | 2012 |
| Premier Jobs UK Limited | Administrative & support | 2007 |
| Prestige Grounds Limited | Agriculture & fishing | 2015 |
| Preston & Reilly Services Limited | Information & communication | 2002 |
| Prevtech Ltd | Professional & scientific | 2023 |
| Pride in Chippenham CIC | Professional & scientific | 2025 |
| Prime Fit Golf Limited | Wholesale & retail | 2026 |
| Primrose and Poppy Ltd | Professional & scientific | 2023 |
| Principeo Limited | Professional & scientific | 2022 |
| Printbloom.Cl Limited | Wholesale & retail | 2023 |
| Printroom Contracts Limited | Wholesale & retail | 2000 |
| Priors Ltd | Financial services | 2015 |
| PRM Property Investments Limited | Real estate | 2007 |
| PRM Rural Engineering Services Ltd | Construction | 2016 |
| Pro Cast Building Ltd | Construction | 2013 |
| Pro Events Agency Ltd | Professional & scientific | 2024 |
| Pro Scaffolding Solutions Ltd | Construction | 2025 |
| Proactive Administration Solutions Limited | Financial services | 2012 |
| Proclaim Collections Ltd | Administrative & support | 2024 |
| Product Support (Holdings) Limited | Extraterritorial | 2006 |
| Product Support Limited | Extraterritorial | 1994 |
| Professor Assessor Ltd | Information & communication | 2016 |
| Proformanceuk Ltd | Wholesale & retail | 2024 |
| Project Apheleia Ltd | Information & communication | 2025 |
| Project Planning Solutions Limited | Administrative & support | 2003 |
| Promethium Inc Limited | Real estate | 2023 |
| Promtu Ltd | Administrative & support | 2018 |
| Propatterns Ltd | Information & communication | 2021 |
| Properpetti Ltd | Manufacturing | 2023 |
| Property Gambit Limited | Real estate | 2009 |
| Proski Ltd | Real estate | 2021 |
| Protective Coating Systems (UK) Limited | Construction | 2002 |
| Protrust Cleaning Ltd | Administrative & support | 2025 |
| Proventus International Limited | Real estate | 2025 |
| PS Electrical (Wilts) Ltd | Manufacturing | 2015 |
| Psbw Services Limited | Manufacturing | 2016 |
| PSI Agri Limited | Wholesale & retail | 2019 |
| PSL Property Development Ltd | Construction | 2026 |
| PSP Insurance & Financial Solutions Limited | Administrative & support | 2002 |
| PT Signalling Limited | Professional & scientific | 2008 |
| Ptandreev Limited | Arts & recreation | 2024 |
| PUB in a Field Ltd | Hospitality | 2021 |
| Publicola Limited | Professional & scientific | 2011 |
| Pulmosant Limited | Professional & scientific | 2021 |
| Pure Carpentry & Building Ltd | Construction | 2025 |
| Pure Electronics Ltd | Manufacturing | 2011 |
| Purple Blossom Holiday Homes Ltd | Real estate | 2023 |
| Purpleace Limited | Information & communication | 2005 |
| Purpol Limited | Professional & scientific | 2014 |
| Purpol Marketing Limited | Administrative & support | 2014 |
| PYT Automotive Limited | Wholesale & retail | 2024 |
| PYT Mixer Hire Limited | Administrative & support | 2018 |
| PYT Property Management Ltd | Real estate | 2023 |
| Q.B. Systems Limited | Information & communication | 1990 |
| Qixol Ltd | Information & communication | 2012 |
| QLU Health Limited | Health & social care | 2017 |
| Qswise Ltd | Professional & scientific | 2025 |
| Quadratix Limited | Information & communication | 2008 |
| Quailplace Limited | Hospitality | 1986 |
| Quanris Ltd | Manufacturing | 2025 |
| Quantum Construction (Southern) Ltd | Construction | 2021 |
| Quantum Fields AI Limited | Extraterritorial | 2026 |
| Quantum Unity Ltd | Administrative & support | 2013 |
| Queenfield Court Management Company Limited | Households | 1974 |
| Quest (Sustainability & Management) Associates Limited | Professional & scientific | 1998 |
| Questplus Healthcare & Staffing Ltd | Transport & logistics | 2025 |
| Quick Mobile Repair Limited | Wholesale & retail | 2020 |
| Quick Mobile Trade Limited | Wholesale & retail | 2023 |
| Quick Phone Trade Limited | Wholesale & retail | 2021 |
| Quickmove of Calne Limited | Transport & logistics | 2017 |
| Quicksilva Limited | Information & communication | 1999 |
| Quill MAI Limited | Professional & scientific | 2010 |
| R & H Electric (Basingstoke) Limited | Wholesale & retail | 2007 |
| R & M Aldridge Limited | Wholesale & retail | 1997 |
| R and M Field Service Ltd | Agriculture & fishing | 2024 |
| R C Taping & Jointing Limited | Construction | 2007 |
| R D Benson Ltd | Transport & logistics | 2007 |
| R Guest Consulting Ltd | Professional & scientific | 2022 |
| R H & I R Cradock Limited | Agriculture & fishing | 2015 |
| R H Rudler & SON Limited | Agriculture & fishing | 2011 |
| R J Marks Ltd | Administrative & support | 2009 |
| R J Surman & SON Ltd | Agriculture & fishing | 2008 |
| R M Stevens Limited | Health & social care | 2006 |
| R Wilson DS Ltd | Health & social care | 2018 |
| R&Pk Limited | Wholesale & retail | 2025 |
| R-Dvs Services Ltd | Wholesale & retail | 2026 |
| R.& K.Edwards & Co.Limited | Real estate | 1963 |
| R.J.O Industries Ltd | Construction | 2025 |
| R.W. Knight and SON Limited | Wholesale & retail | 2003 |
| R2 Consulting and Contracting Ltd | Agriculture & fishing | 2020 |
| R2 Group Investments Ltd | Financial services | 2026 |
| R55 Investments Ltd | Construction | 2024 |
| Racewear Ltd | Wholesale & retail | 2009 |
| Racing Incident Ltd | Information & communication | 2025 |
| Radence Space Limited | Information & communication | 2018 |
| Radically Unwired Company Ltd | Professional & scientific | 2023 |
| Radicel Ltd | Professional & scientific | 2026 |