| Portswood Tyres Ltd | Manufacturing | 2010 |
| Portway FM Limited | Information & communication | 2022 |
| Poseidon Marine Management Limited | Professional & scientific | 2023 |
| Poseidon Network Limited | Construction | 2023 |
| Poseidon Safety Consultants Ltd | Transport & logistics | 2016 |
| Posh & Blush Beauty Inc. Limited | Other services | 2026 |
| Posh Pads Group Holdings Ltd | Professional & scientific | 2017 |
| Posh Pads Property Management Ltd | Real estate | 2006 |
| Posh Pet Parlour Ltd | Other services | 2023 |
| Posh Property Ltd | Real estate | 2019 |
| Position to WIN Limited | Professional & scientific | 2013 |
| Positive Change Media CIC | Information & communication | 2022 |
| Positive Core Care Ltd | Health & social care | 2022 |
| Positive Energy Limited | Energy | 2019 |
| Positive Message Limited | Extraterritorial | 2006 |
| Positive Over Negative Hospitality Limited | Real estate | 2026 |
| Positive Subversion Limited | Professional & scientific | 2019 |
| Positive Theta Limited | Financial services | 2021 |
| Post Formed Systems Ltd | Extraterritorial | 2013 |
| Postdan Ltd | Transport & logistics | 2025 |
| Poster Boiz Ltd | Wholesale & retail | 2025 |
| Poswall & Sons Limited | Real estate | 2023 |
| Poswall Law Limited | Professional & scientific | 2020 |
| Poswall Limited | Extraterritorial | 2020 |
| Poswall Properties Ltd | Real estate | 2018 |
| Pottery Close Management Company Limited | Households | 2009 |
| Pottiwal Property Investments Limited | Real estate | 2025 |
| Potts Farm Limited | Professional & scientific | 2004 |
| Pound Court RTM Company Ltd | Households | 2010 |
| Pound for Pound Show Ground C.I.C. | Education | 2017 |
| Pound Plus Daily Ltd | Wholesale & retail | 2026 |
| Pound Saver (Rumana) Ltd | Wholesale & retail | 2015 |
| Pounder Holdings Limited | Arts & recreation | 2024 |
| Pour Decisions Club Ltd | Manufacturing | 2026 |
| Poustie & Co Ltd | Financial services | 2013 |
| Povey Financial Planning Limited | Professional & scientific | 2020 |
| Powa Plumbing Ltd | Construction | 2022 |
| Powells Electrical Limited | Professional & scientific | 2017 |
| Powells Group Trustee Company Limited | Professional & scientific | 2026 |
| Powells Shopfitting Services Limited | Extraterritorial | 2008 |
| Power Account Limited | Professional & scientific | 2001 |
| Power Accountax Limited | Professional & scientific | 2000 |
| Power Analysis Ltd | Information & communication | 2023 |
| Power Car Repair Ltd | Wholesale & retail | 2019 |
| Power Consulting UK Ltd. | Professional & scientific | 2002 |
| Power Direct Ltd | Administrative & support | 2003 |
| Power Financial Services Ltd | Financial services | 2022 |
| Power Generation Services Limited | Construction | 2002 |
| Power Healthcare Limited | Health & social care | 2022 |
| Power Mortgages Ltd | Financial services | 2011 |
| Power Protect UK Ltd | Manufacturing | 2012 |
| Power Secretaries Limited | Administrative & support | 2003 |
| Power System Evolution Ltd | Professional & scientific | 2024 |
| Power Tool Sales UK Ltd | Wholesale & retail | 2004 |
| Powerage Design Limited | Information & communication | 2025 |
| Powerboats Limited | Wholesale & retail | 2005 |
| Powered by Padel Limited | Wholesale & retail | 2026 |
| Powerforce Electrical Services Limited | Construction | 2007 |
| Powerforce Renewables Limited | Construction | 2023 |
| Powerful Allies Limited | Energy | 2011 |
| Powerhouse Music Ltd | Wholesale & retail | 2024 |
| Powerplay Ltd | Hospitality | 2025 |
| Powerplus (GB) Limited | Construction | 2002 |
| Powerplus Communications Limited | Construction | 2021 |
| Powerplus Electrical Contractors Limited | Construction | 2025 |
| Powerplus Fire Limited | Administrative & support | 2025 |
| Powerplus GB Holdings Limited | Financial services | 2017 |
| Powers and Company (2000) Limited | Professional & scientific | 2008 |
| Pownall Properties Limited | | 1989 |
| Powr Homes Ltd | Real estate | 2024 |
| Poxylizard Limited | Information & communication | 2015 |
| PPD Pokemon Limited | Wholesale & retail | 2025 |
| PPE Europe Ltd | Wholesale & retail | 2020 |
| PPH IT Limited | Information & communication | 2016 |
| PPH Partners Limited | Administrative & support | 2012 |
| PPN Transport Service Ltd | Transport & logistics | 2014 |
| PPS - People Property Solutions Ltd | Construction | 2023 |
| PPU Enterprises Limited | Health & social care | 2018 |
| PPU Properties Limited | Real estate | 2020 |
| PQRARA223 Limited | Manufacturing | 2015 |
| Practical Cladding Solutions Ltd. | Professional & scientific | 2007 |
| Practical Express Limited | Education | 2025 |
| Practical Housekeeping & Management Services Limited | Professional & scientific | 1986 |
| Pranav Healthcare Ltd | Wholesale & retail | 2022 |
| Prasad Locum Services Limited | Wholesale & retail | 2015 |
| Prawes Ltd | Information & communication | 2025 |
| Praxis Alpha Partners LLP | | 2021 |
| Pray Enterprise Ltd | Manufacturing | 2026 |
| PRB Auto Paint Ltd | Construction | 2021 |
| PRB IT Services Ltd | Information & communication | 2011 |
| PRE UK Limited | Wholesale & retail | 2005 |
| Precast Structural Solutions Ltd | Construction | 2021 |
| Precinct Snax Ltd | Hospitality | 2020 |
| Precious Steps Preschool Limited | Education | 2017 |
| Precipice Design Limited | Professional & scientific | 2010 |
| Precis (521) Limited | Financial services | 1986 |
| Precise Beauty & Aesthetics Ltd | Other services | 2022 |
| Precise Brows & Beauty Limited | Other services | 2024 |
| Precise DRY Lining Ltd | Construction | 2023 |
| Precise Electro-Plating Works Limited | Manufacturing | 1958 |