| PJ Steward Ltd | Construction | 2024 |
| PJB Shipping & Tech Ltd | Transport & logistics | 2025 |
| Pjhr Developments Ltd | Real estate | 2024 |
| Place for Work Limited | Administrative & support | 2020 |
| PLACES101 Ltd | Professional & scientific | 2025 |
| Plan Outsource Ltd | Financial services | 2018 |
| Planet Plumbing & Electrical Ltd | Wholesale & retail | 2026 |
| Planning BEE London Ltd | Professional & scientific | 2024 |
| PLANO2020 Ltd | Wholesale & retail | 2025 |
| Plantbees Limited | Wholesale & retail | 2024 |
| Platinum Car Hire London Ltd | Administrative & support | 2024 |
| Platinum Executive Homes Ltd | Real estate | 2023 |
| Platinum Tyres (Online) Limited | Wholesale & retail | 2025 |
| Platinumplux Ltd | Real estate | 2022 |
| Playaway Nursery (BCC) Limited | Education | 2011 |
| Playaway Nursery (Srcc) Ltd | Education | 2008 |
| Playaway Nursery Ltd | Education | 2003 |
| PLE London Ltd | Real estate | 2023 |
| Plne Collective Ltd | Wholesale & retail | 2026 |
| PLT Online Ltd | Other services | 2023 |
| Plugaway Limited | Wholesale & retail | 2025 |
| Plum and Pickle Ltd | Real estate | 2020 |
| Plumbing Valley Limited | Construction | 2023 |
| Plus Healthcare Limited | Health & social care | 2023 |
| Pmdt UK Ltd | Wholesale & retail | 2025 |
| Pmelo Consultant Ltd | Construction | 2019 |
| Pmpa Ltd | Wholesale & retail | 2025 |
| PMS Composites Ltd | Professional & scientific | 2020 |
| PMU Shop Ltd | Wholesale & retail | 2023 |
| PMV Removals Ltd | Transport & logistics | 2020 |
| PNS Group Limited | Wholesale & retail | 2020 |
| Polar Opposite CLO Ltd | Manufacturing | 2025 |
| Polaris Fire and Electrical Limited | Manufacturing | 2016 |
| Politika News Limited | Information & communication | 2025 |
| Pomegranates and Figs CIC | Administrative & support | 2025 |
| Ponte Nova Ltd | Wholesale & retail | 2019 |
| Pookies Sugar Castle Ltd | Wholesale & retail | 2025 |
| Poon DEE Limited | Hospitality | 2024 |
| Popeye's Peri Peri Ltd | Hospitality | 2017 |
| Poponete Services Limited | Transport & logistics | 2017 |
| POPSOLUTION2007 Ltd | Water & waste | 2019 |
| Popson Real Estate Limited | Real estate | 2025 |
| Porceus Ltd | Real estate | 2021 |
| Poribar Healthcare Ltd | Public administration | 2025 |
| Port of Knowledge Limited | Wholesale & retail | 2012 |
| Portland Estates Southern Ltd | Real estate | 2018 |
| Portobello Shoes & Keys Ltd | Other services | 2018 |
| Posh City Maintenance Ltd | Construction | 2020 |
| Posh London Limited | Wholesale & retail | 2022 |
| Potential Restaurant Ltd | Hospitality | 2020 |
| Pound Stop Ltd | Wholesale & retail | 2020 |
| Poundcity OFF Licence Ltd | Wholesale & retail | 2026 |
| Poundline Wholesale Trading Ltd | Wholesale & retail | 2025 |
| Poundsave Store Limited | Wholesale & retail | 2025 |
| Power Mindset Ltd | Education | 2019 |
| Power Tariff Limited | Administrative & support | 2014 |
| Power-Up Builders Ltd | Construction | 2019 |
| Powerplaymarketing Limited | Information & communication | 2023 |
| Praba Banqueting Venue Limited | Other services | 2019 |
| Pracnet Consultancy Limited | Information & communication | 2014 |
| Praestolocum Limited | Professional & scientific | 2025 |
| Prahari Consultancy Services Ltd | Administrative & support | 2026 |
| Praise Community Chapel International | Other services | 2006 |
| Prawda Limited | Professional & scientific | 2026 |
| Precious Living Limited | Households | 2018 |
| Precise 3D Metrology & Design Solutions UK Ltd. | Wholesale & retail | 2024 |
| Precise Panel Craft Ltd | Wholesale & retail | 2019 |
| Precise Panel Group Ltd | Wholesale & retail | 2026 |
| Precision Finance & Analytics LLP | | 2025 |
| Premecel Limited | Health & social care | 2025 |
| Premier Accident Repair Centre Ltd | Wholesale & retail | 2026 |
| Premier AVE. Ltd | Administrative & support | 2010 |
| Premier Awnings Limited | Manufacturing | 2023 |
| Premier Bedding Ltd | Wholesale & retail | 2021 |
| Premier Boilers Ltd | Construction | 2025 |
| Premier Bond Ltd | Manufacturing | 2024 |
| Premier Bricks Limited | Transport & logistics | 2018 |
| Premier Contract Solutions Limited | Other services | 2013 |
| Premier Flower Imports Ltd | Wholesale & retail | 2024 |
| Premier Food Wholesales Limited | Wholesale & retail | 2022 |
| Premier Living London Ltd | Real estate | 2023 |
| Premier Mobile Solutions GB Ltd | Information & communication | 2009 |
| Premier Packaging Manufacturers Ltd | Manufacturing | 2021 |
| Premier Projects London Ltd | Construction | 2026 |
| Premier Rail Solutions Limited | Administrative & support | 2013 |
| Premier Sports (UK) Ltd | Arts & recreation | 2001 |
| Premier Tyre Services (Romford) Limited | Wholesale & retail | 2025 |
| Premier Vehicle Management Ltd | Wholesale & retail | 2018 |
| Premiermaintenancegroup Ltd | Water & waste | 2023 |
| Premium E Commerce Company Limited | Wholesale & retail | 2025 |
| Premium Housing Limited | Hospitality | 2017 |
| Premium Nights Ltd | Real estate | 2023 |
| Premium Workforce Services Ltd | Administrative & support | 2024 |
| PREMIUMKICKS1 Ltd | Wholesale & retail | 2026 |
| Prep for Medicine Ltd | Education | 2020 |
| Present at Site Ltd | Construction | 2021 |
| Prestige Auto Parts & Services Ltd | Wholesale & retail | 2020 |
| Prestige Maintenance and Construction Limited | Construction | 2014 |
| Prestige Supported Living Care Services Ltd | Health & social care | 2015 |
| Prestigieux Cleaning Limited | Administrative & support | 2025 |