| Peter Thomas (Consulting) Limited | Professional & scientific | 2011 |
| Peter Wright Engineering Limited | | 1978 |
| Peters Way Ltd | Hospitality | 2018 |
| Petersen Williams LLP | | 2010 |
| Peterson Properties (UK) Ltd | Wholesale & retail | 2019 |
| Peterson Property Holdings Limited | Financial services | 2021 |
| Peterston 21 Limited | Real estate | 2018 |
| Peterston Tea Limited | Agriculture & fishing | 2023 |
| Peterstone Lakes Group Ltd | Hospitality | 2025 |
| Peterstone Lakes Holdings Limited | Financial services | 2023 |
| Petherton Mews Management Limited | Real estate | 2024 |
| Petite Lights Ltd | Manufacturing | 2024 |
| Petlan Court (Cardiff) Company Limited | Administrative & support | 2015 |
| Petnurseuk Ltd | Professional & scientific | 2021 |
| Petra Christie Limited | Wholesale & retail | 2019 |
| Petradent Ltd | Health & social care | 2019 |
| Petras International Consult Ltd | Professional & scientific | 2020 |
| Petrelli Ltd | Wholesale & retail | 2018 |
| Petrichor Designs Ltd | Construction | 2016 |
| Petrie Recruitment Limited | Administrative & support | 2005 |
| Petro Quantum Energy Limited | Hospitality | 2024 |
| Petrojac Ltd | Wholesale & retail | 2025 |
| Petrolco Ltd | Mining & quarrying | 2021 |
| Petron Logistics Ltd | Transport & logistics | 2024 |
| Petrosedra Ltd | Mining & quarrying | 2025 |
| Pets and Walks Ltd | Other services | 2025 |
| Pettigrew Bakeries Limited | Wholesale & retail | 2015 |
| Pettinedicorno Ltd | Wholesale & retail | 2025 |
| Pettorway Limited | Information & communication | 2013 |
| Petzsu Ltd | Other services | 2018 |
| PEV XQ Ltd | Health & social care | 2018 |
| Pexactly Ltd | Wholesale & retail | 2025 |
| PEZ Air Ltd | Construction | 2018 |
| PEZ Auto Group Ltd | Wholesale & retail | 2025 |
| PEZ Property Developments Ltd | Construction | 2016 |
| PF Indalo Ltd | Agriculture & fishing | 2019 |
| PFM Consulting Solutions Ltd | Professional & scientific | 2017 |
| PFP Consultants Ltd | Professional & scientific | 2023 |
| PFP Trustees Limited | Professional & scientific | 2019 |
| PG Evans Consulting Limited | Professional & scientific | 2014 |
| PG Fittings Ltd | Construction | 2017 |
| PG Plumbing Ltd | Construction | 2018 |
| Pg-Eq Ltd | Wholesale & retail | 2018 |
| PG99 Electrix Ltd | Construction | 2026 |
| Pgbullys UK Ltd | Agriculture & fishing | 2021 |
| PGH Investments Limited | Financial services | 2019 |
| Pghi UK Ltd | Financial services | 2019 |
| PGK Property Investments Limited | Real estate | 2021 |
| PGL Trading Limited | Wholesale & retail | 2023 |
| PGM Technical Consultancy Limited | Information & communication | 2013 |
| PGO Logistics Ltd | Transport & logistics | 2025 |
| PGR Property Investment Limited | Professional & scientific | 2020 |
| PGR Services Ltd | Professional & scientific | 2026 |
| PGS Commodities PC | | 2019 |
| PGW Defence Limited | Professional & scientific | 2011 |
| PH & SR Developments Limited | Extraterritorial | 2012 |
| PH Accounting Service Ltd | Professional & scientific | 2012 |
| PH Holdings Ltd | Financial services | 2018 |
| PH Propco Ltd | Real estate | 2020 |
| Phab Floors Limited | Construction | 2016 |
| Phab Lettings Limited | Real estate | 2026 |
| Phab Utilities Limited | Water & waste | 2022 |
| PHANERO522 Limited | Health & social care | 2023 |
| Phantom Athletics Cheer Ltd | Arts & recreation | 2026 |
| Phantom Culture Ltd | Arts & recreation | 2025 |
| Phantom Customs Ltd | Wholesale & retail | 2022 |
| Phantom Equip Ltd | Wholesale & retail | 2020 |
| Phantom Restaurants Ltd | Hospitality | 2016 |
| Phareon Consulting Limited | Professional & scientific | 2025 |
| Pharm Cavasi Ltd | Wholesale & retail | 2022 |
| Pharma MED Group Ltd | Wholesale & retail | 2014 |
| Pharma Venture Capital Ltd | Wholesale & retail | 2016 |
| Pharma-Chem International Co., Limited | Professional & scientific | 2008 |
| Pharmaced Ltd | Wholesale & retail | 2024 |
| Pharmacity Limited | Health & social care | 2015 |
| Pharmafootpath Ltd | Administrative & support | 2022 |
| Pharmahead Clinics Ltd | Health & social care | 2024 |
| Pharmaplanet Ltd | Wholesale & retail | 2021 |
| Pharmaron UK Limited | Professional & scientific | 2013 |
| Pharmatelligence Limited | Professional & scientific | 2009 |
| Pharmax Logistics Ltd | Wholesale & retail | 2026 |
| Pharmdel Ltd | Information & communication | 2021 |
| Pharming Tyres NI Ltd | Administrative & support | 2019 |
| Pharmonitor Business Media Limited | Information & communication | 2019 |
| Pharmy Ventures Ltd | Health & social care | 2019 |
| Pharos Fire and Security Limited | Construction | 2018 |
| Pharos Provisions Ltd | Professional & scientific | 2016 |
| Phase 1 Associates Limited | Wholesale & retail | 2019 |
| Phase 2 Umbrella Limited | Professional & scientific | 2024 |
| Phase 4 Wenallt Estate Management Company Limited | Households | 2012 |
| PHASE3 Sports Massage Ltd | Other services | 2025 |
| Phat Cards Ltd | Wholesale & retail | 2020 |
| Phat Chips Ltd | Hospitality | 2020 |
| Phat DAI Bulls Limited | Professional & scientific | 2017 |
| Phatboysuk Ltd | Hospitality | 2022 |
| PHB Event Management Limited | Arts & recreation | 2005 |
| Phdc Ltd | Extraterritorial | 2015 |
| PHE Contract Solutions Limited | Professional & scientific | 2021 |
| Phelps and SON Consultant Ltd | Hospitality | 2016 |
| Phenlyod Limited | Wholesale & retail | 2025 |