| Pervasive Dynamics Ltd | Information & communication | 2018 |
| Pet Company Limited(The) | Wholesale & retail | 1986 |
| Pet Potential Ltd | Extraterritorial | 2013 |
| Pet Social Network Ltd | Professional & scientific | 2025 |
| Petabyte Systems Limited | Information & communication | 2016 |
| Petal Asset Ltd | Construction | 2017 |
| Petalia Ltd | Wholesale & retail | 2025 |
| Pete Goss Limited | Professional & scientific | 2024 |
| Pete Stuckey Training Consultancy Ltd | Professional & scientific | 2019 |
| Peter a Holdings Ltd | Financial services | 2026 |
| Peter COX Developments Limited | Real estate | 2003 |
| Peter Day Precision Engineering Limited | Manufacturing | 2006 |
| Peter Reading Geotechnical Consulting Ltd. | Professional & scientific | 2014 |
| Peter Walton Limited | Other services | 2021 |
| Petfecto Ltd | Other services | 2024 |
| Petit Sourire Ltd | Professional & scientific | 2025 |
| Petite Hotels Limited | Hospitality | 2016 |
| Petitions Direct Limited | Financial services | 2008 |
| Petnova Limited | Wholesale & retail | 2025 |
| Pets World Limited | Extraterritorial | 2004 |
| Petworth Close Management Company Limited | Hospitality | 2013 |
| PEX Ventures Ltd | Wholesale & retail | 2026 |
| PF Financial Services Ltd | Financial services | 2018 |
| PF Marine Ltd | Manufacturing | 2022 |
| PFC Education Land Ltd | Real estate | 2020 |
| PFC Nominees Limited | Real estate | 2002 |
| PFC Property Ltd | Real estate | 2017 |
| PFC School Ltd | Education | 2007 |
| PFJ Technical Services Limited | Information & communication | 2014 |
| PFM Associates Limited | Financial services | 1999 |
| PG Building Services Ltd | Construction | 2026 |
| PG Direct Limited | Wholesale & retail | 2024 |
| PG Promotional Items Ltd | Professional & scientific | 2014 |
| PG Property Letting Ltd | Real estate | 2020 |
| PGC Payments Ltd | Information & communication | 2025 |
| PGF Mccauley Limited | Health & social care | 2012 |
| PGF Tech Limited | Information & communication | 2006 |
| PGS Construction Limited | Construction | 2017 |
| PH Coffee Limited | Manufacturing | 2020 |
| PH Digital Limited | Wholesale & retail | 2025 |
| PH Survey Ltd | Professional & scientific | 2020 |
| PH23 Fishing Ltd | Agriculture & fishing | 2024 |
| Pharma Alertness Ltd. | Health & social care | 2015 |
| Phat Fryer Limited | Hospitality | 2021 |
| PHD Pipework Ltd | Construction | 2024 |
| Pheby Group Ltd | Financial services | 2025 |
| Phenix Care Ltd | Health & social care | 2017 |
| Phenomenail Ltd | Wholesale & retail | 2026 |
| PHI Collective Ltd | Professional & scientific | 2020 |
| PHI Studio Ltd | Professional & scientific | 2025 |
| Phil Webb (Bricklayers) Ltd. | Construction | 2001 |
| Philip Hughes Property Limited | Real estate | 2010 |
| Philip Lund Football Ltd | Arts & recreation | 2025 |
| Philip Neate Ltd | Real estate | 2025 |
| Philip Sealey Limited | Professional & scientific | 1998 |
| Philippa Sole Ltd | Real estate | 2016 |
| Phillips Garage Limited | Wholesale & retail | 2004 |
| Phillips Tucker Property Ltd | Real estate | 2022 |
| Phine Limited | Construction | 2025 |
| Phoenix 27A Glen Road Freehold Limited | Households | 2024 |
| Phoenix Company Services Ltd | Professional & scientific | 2015 |
| Phoenix EV & Electrical Limited | Construction | 2023 |
| Phoenix Pathways Recovery Clinic Ltd | Health & social care | 2025 |
| Phoenix Property Management Ltd | Real estate | 2015 |
| Phoenixy Ltd | Manufacturing | 2025 |
| Phoex Ltd | Professional & scientific | 2021 |
| Phola Limited | Information & communication | 1998 |
| Phone Bargains Ecom Ltd | Wholesale & retail | 2026 |
| Phone Wave Limited | Wholesale & retail | 2024 |
| Phoneware Limited | Professional & scientific | 1996 |
| Phonix Cleaning Services Ltd | Administrative & support | 2022 |
| Phonixe Limited | Manufacturing | 2025 |
| Phonixl Ltd | Wholesale & retail | 2025 |
| Phonixz Ltd | Manufacturing | 2025 |
| Phor Services Ltd | Arts & recreation | 2025 |
| Photo Occasions Ltd | Information & communication | 2011 |
| Photovolt Services Ltd | Professional & scientific | 2020 |
| Physics Gene Ltd | Wholesale & retail | 2025 |
| PI Digital Limited | Administrative & support | 2022 |
| PI Group Consultants Limited | Education | 2022 |
| PI Group Holdings Limited | Financial services | 2022 |
| Piano Imports Ltd | Wholesale & retail | 2018 |
| Piatto Studios Ltd | Wholesale & retail | 2025 |
| Picbray Limited | Real estate | 1979 |
| Piccan UK Limited | Manufacturing | 2025 |
| Pickapixel Ltd | Information & communication | 2018 |
| Pickndeal Ltd | Wholesale & retail | 2025 |
| Pickwick Electric Co Ltd | Construction | 2025 |
| Piece Collection Limited | Wholesale & retail | 2024 |
| Pier Journal Ltd | Information & communication | 2025 |
| Pigeonsoft Limited | Information & communication | 2026 |
| Pigstock Limited | Hospitality | 2018 |
| Pigtoria Secrets Ltd | Wholesale & retail | 2024 |
| Pikus Transspees Ltd | Wholesale & retail | 2025 |
| Pilartronic Ltd | Information & communication | 2017 |
| Pilates Powerhouse Ltd | Wholesale & retail | 2023 |
| Pilgrim Management Services Ltd | Professional & scientific | 1996 |
| Pillow and Beyond Ltd | Wholesale & retail | 2024 |
| Pine Tree Court (Bournemouth) Management Company Limited | Households | 1975 |
| Pinehurst (Poole) Management Co. Limited | Households | 1986 |