| Page Consultancy Limited | Professional & scientific | 2017 |
| Pajs Limited | Information & communication | 2021 |
| Palmerston Road Management Limited | Households | 1997 |
| Palty (UK) Limited | Wholesale & retail | 1993 |
| Pamasuco Flameproofing Company Limited (the) | Wholesale & retail | 1971 |
| Pantarai Holdings Ltd | Financial services | 2025 |
| Pantarai Ltd | Financial services | 2024 |
| Paperless World Limited | Information & communication | 2014 |
| Parade DRY Cleaners Ltd | Other services | 2018 |
| Paradigm AI Limited | Information & communication | 2024 |
| Paraso Ltd | Professional & scientific | 2023 |
| Park Avenue Princess Limited | Manufacturing | 2022 |
| Park Interiors Limited | Construction | 2004 |
| Park Refurbishment Limited | Construction | 2006 |
| Park West Properties Ltd | Real estate | 2026 |
| Parnick Properties (Grimsby) Limited | Real estate | 2022 |
| Parnick Property Developments (Grimsby) Limited | Real estate | 2022 |
| Parnick Property Investments (Grimsby) Limited | Real estate | 2022 |
| Parnick Property Investments Limited | Real estate | 2022 |
| Parnick Property Refurbishment (Grimsby) Limited | Real estate | 2022 |
| Parnick Tower Hamlets Limited | Real estate | 2026 |
| Parsons Management Services Limited | Professional & scientific | 2024 |
| Passion 8 Events Ltd | Hospitality | 2024 |
| Pathway Projects Hackney Ltd | Real estate | 2020 |
| Pathway Projects Limited | Real estate | 2015 |
| Pathway Property Investments Limited | Real estate | 2016 |
| Patray Limited | Administrative & support | 2017 |
| Paul Benson Management Ltd | Real estate | 2023 |
| Paul Scott Consultancy Limited | Administrative & support | 2015 |
| Pawperties Limited | Construction | 2025 |
| PAY Easy and Safely Limited | Information & communication | 2015 |
| Payroll Plus Limited | Information & communication | 1986 |
| PBS Aviation Services Limited | Transport & logistics | 2013 |
| PDN Property Developments Limited | Real estate | 2023 |
| Pegsdon Ltd | Real estate | 2021 |
| Pemtel Homes Limited | Construction | 1993 |
| Penagen Limited | Information & communication | 2023 |
| Penta Amud Ltd | Information & communication | 2017 |
| Penta Amud Properties Ltd | Real estate | 2019 |
| Perrla Developments Ltd | Construction | 2018 |
| Peter Angel & Co Limited | Professional & scientific | 2004 |
| Picante Products Ltd | Wholesale & retail | 2025 |
| Pickaposta Limited | Other services | 2020 |
| Pinnaclethrive Ltd | Professional & scientific | 2024 |
| Pinpoint Polling Ltd | Professional & scientific | 2025 |
| Pitchset Limited | Other services | 2010 |
| Pitfield Construction Ltd | Construction | 2026 |
| Pitfield Homes Ltd | Construction | 2023 |
| Pixels and Dust Ltd | Information & communication | 2022 |
| Pk&Mya (UK) Ltd | Professional & scientific | 2022 |
| Plan B Software Ltd | Information & communication | 2022 |
| Plan IT Constructions Ltd | Real estate | 2022 |
| Planet Kambo Ltd | Health & social care | 2018 |
| Planet Property (SOT) Ltd | Real estate | 2012 |
| Platinum Bodyworks UK Limited | Wholesale & retail | 1999 |
| Playhubs UK Ltd | Education | 2020 |
| Plum Care Services Limited | Health & social care | 2023 |
| Pmac Fitness Ltd | Arts & recreation | 2017 |
| Pmac Online Training Ltd | Arts & recreation | 2023 |
| Pmac Retreats Limited | Arts & recreation | 2022 |
| PML Builders Ltd | Construction | 2020 |
| PN Property Developments Limited | Real estate | 2025 |
| Poldark Limited | Real estate | 2023 |
| Polyvalent Ltd | Information & communication | 2023 |
| Pomegranate Homes Limited | Real estate | 2016 |
| Popcorn Events Limited | Administrative & support | 2005 |
| Poplar Way Management Limited | Other services | 1971 |
| Posicloud Limited | Information & communication | 2016 |
| Powerplay Development Ltd | Arts & recreation | 2026 |
| Premier Brokers Limited | Administrative & support | 2000 |
| Premier Plumbing & Heating Merchants Limited | Wholesale & retail | 2003 |
| Press Play HQ Ltd | Information & communication | 2022 |
| Pressure Limited | Arts & recreation | 2026 |
| Prestige Specialist Finishes London Ltd | Construction | 2015 |
| Prime Vacant Solutions Ltd | Construction | 2025 |
| Pro Performance Sports Network Ltd | Arts & recreation | 2021 |
| Proct Ltd | Professional & scientific | 2022 |
| Prodeck Waterproofing Limited | Construction | 2018 |
| Prodicom Ltd | Information & communication | 2012 |
| Profitz Plumbing Ltd | Construction | 2018 |
| Projict Ltd | Information & communication | 2025 |
| Propel Property Ventures Limited | Real estate | 2024 |
| Proptly Group Limited | Information & communication | 2026 |
| Proque Limited | Professional & scientific | 2010 |
| Protein Haus (UK) Limited | Manufacturing | 2019 |
| PSH Visual Arts Ltd | Professional & scientific | 2026 |
| PUB and Bar Accessories Ltd | Wholesale & retail | 2019 |
| Publishing Aloud Ltd | Information & communication | 2023 |
| Puer Ltd | Health & social care | 2024 |
| Punjtan Limited | Real estate | 2016 |
| Puor SDP Ltd | Real estate | 2021 |
| PURE8 Foods Limited | Manufacturing | 2024 |
| Q the Talent Ltd | Professional & scientific | 2015 |
| Q V S Trustees Limited | Professional & scientific | 1970 |
| Q2PRO Ltd | Wholesale & retail | 2024 |
| Quantumfai Ltd | Information & communication | 2024 |
| Quick Lord Ltd | Real estate | 2020 |
| Quickstream Services Limited | Manufacturing | 2017 |
| Quicktime Recovery and Transport Limited | Transport & logistics | 2026 |
| Quintessential Governess Ltd | Administrative & support | 2025 |