| Prosrv Limited | Professional & scientific | 2014 |
| Prostko Ltd | Wholesale & retail | 2015 |
| Prosync Services Ltd | Professional & scientific | 2023 |
| Prota Global Ltd | Financial services | 2022 |
| Protal Limited | Professional & scientific | 2011 |
| Protank Waterproofing Ltd | Construction | 2025 |
| Protax Accountants UK Ltd | Professional & scientific | 2011 |
| Protech Roofing Limited | Construction | 2001 |
| Protech Timber Engineering Ltd | Manufacturing | 2014 |
| Protect and Test Limited | Wholesale & retail | 2020 |
| Protect Financial International Limited | Information & communication | 2020 |
| Protect Financial Solutions Limited | Financial services | 2025 |
| Protect Group International Limited | Administrative & support | 2020 |
| Protect International Limited | Information & communication | 2020 |
| Protecting Ltd | Information & communication | 2019 |
| Protectus Healthcare Limited | Financial services | 2015 |
| Protego Security Limited | Administrative & support | 2025 |
| Protein of Sweden Ltd | Wholesale & retail | 2024 |
| Proteins 4U Ltd | Wholesale & retail | 2018 |
| Protek One Limited | Manufacturing | 2019 |
| Protier Limited | Construction | 1978 |
| Proto Pack Limited | Administrative & support | 2025 |
| Protons Properties (UK) Ltd | Real estate | 2017 |
| Protras Limited | Hospitality | 2022 |
| Proud FOX Creative Ltd | Information & communication | 2018 |
| Proud PR Limited | Professional & scientific | 2023 |
| Provego Limited | Financial services | 2014 |
| Proven Plumbing Limited | Construction | 2013 |
| Proventus (UK) Ltd | Manufacturing | 2008 |
| Proveprivacy Ltd | Information & communication | 2018 |
| PROVERBS31WOMAN CIC | Administrative & support | 2019 |
| Provet Cloud (UK) Limited | Information & communication | 2019 |
| Provida Loan Limited | Financial services | 2007 |
| Providence Academy Limited | Education | 2025 |
| Providence JSJ Limited | Real estate | 2021 |
| Providence Solution Services Limited | Professional & scientific | 2014 |
| Providential Place Ltd | Health & social care | 2024 |
| Provision 360 Limited | Wholesale & retail | 2018 |
| Provision Investments Limited | Real estate | 2022 |
| Provision Properties Limited | Real estate | 2014 |
| Provisions Cargo Ltd | Wholesale & retail | 2025 |
| Prowhite Limited | Wholesale & retail | 2015 |
| Prox-Tag Ltd | Information & communication | 2011 |
| Proximity Enterprise Solutions Limited | Information & communication | 2008 |
| Proximity Resourcing Limited | Information & communication | 2007 |
| Proxyevents Limited | Wholesale & retail | 2025 |
| Prps Investments Limited | Real estate | 2017 |
| PRS Developments Ltd | Real estate | 2021 |
| Prudentia Group Limited | Financial services | 2021 |
| Prudentia Intl Ltd | Professional & scientific | 2024 |
| Prudentia Tax Limited | Professional & scientific | 2019 |
| Prudo Systems Ltd | Information & communication | 2026 |
| Pruex PAY Ltd | Financial services | 2026 |
| PS Brown Properties Ltd | Real estate | 2019 |
| PS Consulting Solutions Ltd | Professional & scientific | 2012 |
| PS Cremations Funeral Planning Limited | Other services | 2021 |
| PS Cremations Holding Limited | Other services | 2020 |
| PS Cremations Limited | Other services | 2020 |
| PS Express Ltd | Transport & logistics | 2025 |
| PS Food Consultancy Limited | Professional & scientific | 2013 |
| PS Management Consulting Limited | Professional & scientific | 2017 |
| PS Website Design Ltd | Information & communication | 2009 |
| Ps&A Builders Ltd | Construction | 2023 |
| PSA Media Limited | Administrative & support | 2007 |
| PSB Branding Ltd | Professional & scientific | 2023 |
| PSB Construction Services Ltd | Construction | 2022 |
| Psbp NW Debtco Limited | Administrative & support | 2015 |
| Psbp NW Holdco Limited | Administrative & support | 2015 |
| Psbp NW Projectco Limited | Administrative & support | 2015 |
| PSC Education Limited | Arts & recreation | 2019 |
| Pscom Construction Ltd | Construction | 2025 |
| Pscully Limited | Construction | 2024 |
| PSE Logistics Ltd | Transport & logistics | 2017 |
| PSH Creative Ltd | Professional & scientific | 2024 |
| Psingh Solutions Ltd | Real estate | 2025 |
| PSO Consulting Ltd | Administrative & support | 2026 |
| PSP Interiors Limited | Construction | 2006 |
| PSP Properties (Yorkshire) Ltd | Real estate | 2022 |
| PSR Car & Commercial Repairs Ltd | Wholesale & retail | 2014 |
| PSR IT Services Limited | Administrative & support | 2016 |
| Pstan Couriers Ltd | Administrative & support | 2025 |
| PSW Consultancy Services Ltd | Professional & scientific | 2020 |
| PSY Limited | Wholesale & retail | 2018 |
| Psych Expert Services Ltd | Health & social care | 2017 |
| Psychedelic Research Foundation CIC | Professional & scientific | 2023 |
| Psychexpert Services (NW) Ltd | Health & social care | 2020 |
| Psychic Wish Limited | Information & communication | 2014 |
| Psycho Acoustic Ltd | Arts & recreation | 2020 |
| Psychology and Commercial Design Limited | Information & communication | 2007 |
| Psychology Solutions Leeds Limited | Professional & scientific | 2018 |
| Psychotherapy Services Ltd | Information & communication | 2015 |
| PT HR Consultancy Limited | Professional & scientific | 2026 |
| PT Media Ltd | Other services | 2021 |
| Pt-Health Ltd | Arts & recreation | 2019 |
| Ptak Residential Limited | Real estate | 2025 |
| PTF Locket Limited | Professional & scientific | 2013 |
| Ptfs Leeds Limited | Financial services | 2008 |
| PTI Mobile Tyres Ltd | Wholesale & retail | 2026 |
| PTL32 Ltd | Hospitality | 2018 |
| Ptlt Care Solutions Ltd | Health & social care | 2015 |