| Pikes the Movie Limited | Information & communication | 2018 |
| Pilgrim Properties Limited | Real estate | 2015 |
| Piltdown Properties Limited | Other services | 2012 |
| PIM Trustees Limited | Professional & scientific | 1998 |
| Pine Home Developments Limited | Real estate | 2021 |
| Pine Tree Estates Ltd | Real estate | 2026 |
| Pink & White Nails and Beauty Ltd | Other services | 2015 |
| Pink Butterfly Weddings Limited | Administrative & support | 2016 |
| Pink Ice Records Ltd | Information & communication | 2019 |
| Pink Island Limited | Professional & scientific | 2025 |
| Pink Papadam Ltd | Hospitality | 2022 |
| Pinkfox Ltd | Other services | 2023 |
| Pinnacle Protection Ltd | Administrative & support | 2018 |
| Pinoy Travels Limited | Extraterritorial | 2023 |
| Pinpoint Badges & Promotions Holdings Ltd | Financial services | 2024 |
| Pinpoint Badges & Promotions Limited | Other services | 1980 |
| Pioneer Fire Systems Limited | Public administration | 2012 |
| Pipestyle Limited | Administrative & support | 2024 |
| PIR Solutions Ltd | Professional & scientific | 2012 |
| Pitbull Promotions Limited | Professional & scientific | 2025 |
| Pitch Perfect Roofing Essex Ltd | Construction | 2020 |
| Pivaz Brentwood Limited | Hospitality | 2015 |
| Pixelated Tech Limited | Information & communication | 2026 |
| Pixelation Ltd | Information & communication | 2022 |
| Pixie Hollow Norton Ltd | Construction | 2021 |
| Pjdixon Ltd | Construction | 2017 |
| PJF Group Ltd | Professional & scientific | 2024 |
| PJT LOW Carbon Tech Limited | Professional & scientific | 2019 |
| Pksoutions Ltd | Professional & scientific | 2012 |
| PL Worldwide Limited | Wholesale & retail | 2024 |
| Placeview Properties Ltd | Construction | 1998 |
| Plaice Technologies Ltd | Information & communication | 2024 |
| Plam&B Limited | Transport & logistics | 2021 |
| Plan BE Ltd | Wholesale & retail | 2010 |
| Planet Associates Limited | Real estate | 2016 |
| PLANNED2U Ltd | Administrative & support | 2022 |
| Planoros Limited | Information & communication | 2026 |
| Platform Hire Limited | Administrative & support | 2006 |
| Platform Seller Ltd | Wholesale & retail | 2014 |
| Platinum Aesthetics Clinic Ltd | Health & social care | 2024 |
| Platinum AP Ltd | Wholesale & retail | 2020 |
| Platinum Bars Basildon Limited | Hospitality | 2025 |
| Platinum Bars Essex Limited | Hospitality | 2024 |
| Platinum Bars Hertfordshire Ltd | Hospitality | 2025 |
| Platinum Bars Maidenhead Ltd | Hospitality | 2025 |
| Platinum Clinic London Ltd | Wholesale & retail | 2025 |
| Platinum Content Consulting Limited | Professional & scientific | 2010 |
| Platinum Electrical Projects Ltd | Construction | 2021 |
| Platinum Entertainment Hire Limited | Administrative & support | 2019 |
| Platinum Play Centres Essex Limited | Arts & recreation | 2024 |
| Playhouse of Scents Ltd | Wholesale & retail | 2025 |
| Pleasure Stay Ltd | Real estate | 2019 |
| Plexocs Limited | Administrative & support | 2012 |
| Plico Ltd | Manufacturing | 2020 |
| Plugged in Comms Ltd | Wholesale & retail | 2019 |
| Plustherm Ltd | Wholesale & retail | 2026 |
| PM Analytics Ltd | Information & communication | 2008 |
| PM Vision Limited | Wholesale & retail | 2024 |
| PMG Group Limited | Professional & scientific | 2023 |
| PNP1 Limited | Other services | 2017 |
| Pocket Psychologist Limited | Health & social care | 2022 |
| Podobnik Consulting Services Ltd | Professional & scientific | 2024 |
| Point to Point Sealant Solutions Limited | Construction | 2022 |
| Poker Million Limited | Professional & scientific | 2000 |
| Polaris Overseas Finance Limited | Financial services | 2025 |
| Polestar Plumbing Ltd | Construction | 2014 |
| Policysight Limited | Administrative & support | 2018 |
| Polli Interior Limited | Administrative & support | 2017 |
| Polly's DRY Cleaning Ltd | Other services | 2020 |
| Polly's Ironing & Laundry Ltd | Other services | 2020 |
| Polyclinic London Limited | Health & social care | 1998 |
| Pooch Academy Limited | Other services | 2025 |
| POP UP Parties Group Limited | Administrative & support | 2019 |
| Portet Limited | Administrative & support | 2011 |
| Portobello Academy of Music&Arts Ltd | Education | 2025 |
| Positano Ventures Limited | Financial services | 2007 |
| Positive International Limited | Construction | 2022 |
| Posture for Work Limited | Extraterritorial | 2025 |
| Potential Plus Consultancy Ltd | Professional & scientific | 2011 |
| Potential Plus International Limited | Extraterritorial | 2015 |
| Power Bolt Ltd | Administrative & support | 2025 |
| Power Events Ltd | Other services | 2016 |
| Power Insight Ltd | Administrative & support | 2020 |
| Power of Coaching Ltd | Arts & recreation | 2023 |
| Power Recruitment Solutions Limited | Administrative & support | 2011 |
| Power Service 4U Ltd | Administrative & support | 2020 |
| Power Waste Management Limited | Water & waste | 2025 |
| Powercut Properties Limited | Real estate | 2005 |
| Powerguard EV Systems Limited | Manufacturing | 2026 |
| Powerhedron Ltd | Professional & scientific | 2024 |
| Powertec (London) Limited | Construction | 2015 |
| Ppact Consultancy LLP | | 2017 |
| PPR Multi GAS Ltd | Construction | 2021 |
| Praxcil Ltd | Information & communication | 2026 |
| PRE Academy Football Limited | Arts & recreation | 2024 |
| Pre-Eminent Vehicle Transport Limited | Transport & logistics | 2026 |
| Precast & Masonry Services Limited | Construction | 2011 |
| Precision Car Parts Ltd | Wholesale & retail | 2022 |
| Preita Limited | Real estate | 2026 |
| Prekon Ltd | Construction | 2025 |