| Phillips Starr Ltd | Professional & scientific | 2025 |
| Philpin Financial Limited | Financial services | 2020 |
| Phinikasa Ltd | Professional & scientific | 2023 |
| Phire Group Ltd | Manufacturing | 2026 |
| Phoenix 28 Ltd | Health & social care | 2018 |
| Phoenix Ascend Ltd | Professional & scientific | 2026 |
| Phoenix Cloud Solutions Ltd | Real estate | 2021 |
| Phoenix Health Pro CIC | Professional & scientific | 2023 |
| Phoenix House (Residents Association) Limited | Administrative & support | 2014 |
| Phoenix IT Professionals Ltd | Information & communication | 2023 |
| Phoenix Secure Alarm Limited | Administrative & support | 2024 |
| Phoenix Traders Limited | Construction | 2021 |
| Phone True Ltd | Wholesale & retail | 2021 |
| Photogoberry Ltd | Professional & scientific | 2025 |
| Phresh Care Solutions Limited | Administrative & support | 2024 |
| Phrpsy Services Ltd | Health & social care | 2023 |
| Phtmne Ltd | Wholesale & retail | 2022 |
| Phuelled Ltd | Wholesale & retail | 2024 |
| Physio Motive Limited | Other services | 2022 |
| Physiowork Therapy UK Limited | Health & social care | 2019 |
| PI Commercial Ltd. | Real estate | 2025 |
| PI Housing Ltd | Households | 2018 |
| Pickford Trading Company Ltd | Real estate | 2025 |
| PIE2GROUP Limited | Information & communication | 2026 |
| Pieces CIC | Education | 2026 |
| Pierzero Entertainment Limited | Administrative & support | 2024 |
| Pigeon Loft Murals Limited | Manufacturing | 2024 |
| Pigs in Ltd | Hospitality | 2025 |
| Pilgrim Surveying Ltd | Administrative & support | 2022 |
| Pillr Ltd | Professional & scientific | 2018 |
| Pilo-Bash Limited | Wholesale & retail | 2024 |
| PIM London Ltd | Administrative & support | 2012 |
| PIN Piuma Limited | Wholesale & retail | 2022 |
| Pinati Ltd | Administrative & support | 2026 |
| Pincia Ltd | Professional & scientific | 2016 |
| Pine Farm Welfare Ltd | Agriculture & fishing | 2025 |
| Pineda Murray Limited | Hospitality | 2023 |
| Pinehaven Ponies Ltd | Wholesale & retail | 2024 |
| Pinehollow Studios Limited | Information & communication | 2026 |
| Pinewood Heritage Capital Limited | Financial services | 2026 |
| Pink List Technologies Ltd | Information & communication | 2026 |
| Pink Rose Consultancy Ltd | Professional & scientific | 2022 |
| Pinnacle Finance and Property Group Limited | Financial services | 2017 |
| Pinnacle Nexus Group Ltd | Health & social care | 2025 |
| Pinnacle Prime Ecom Ltd | Wholesale & retail | 2026 |
| Pinpoint Brickwork Ltd | Construction | 2025 |
| Pinpoynt.Ai Ltd | Information & communication | 2025 |
| Pioneer Holiday Lets Ltd | Professional & scientific | 2025 |
| Pioneers of Tomorrow Ltd | Professional & scientific | 2025 |
| Pipedream Refurbishments Ltd | Construction | 2025 |
| Pipeline Maintenance Limited | Extraterritorial | 2013 |
| PIT Stop Mobile Ltd | Wholesale & retail | 2025 |
| Pitak Ltd | Administrative & support | 2013 |
| Pitstop Auto Factors Ltd | Wholesale & retail | 2024 |
| Pivotal CGI Limited | Arts & recreation | 2023 |
| Pivotal Energy Group Ltd | Professional & scientific | 2025 |
| Pixeflare Ltd | Information & communication | 2026 |
| Pixel Beach Ltd | Manufacturing | 2000 |
| Pixelmuse IT Ltd | Information & communication | 2025 |
| Pixhall Computer Services Limited | Information & communication | 1989 |
| Pixip Ltd | Information & communication | 2025 |
| Pixrating UK Limited | Administrative & support | 2016 |
| Pizza Crust Express Limited | Manufacturing | 2019 |
| PJD Assets Ltd | Real estate | 2017 |
| PJD Consultants Ltd | Professional & scientific | 2016 |
| PJF Site Engineering Services Ltd | Construction | 2010 |
| PJL 2014 Ltd | Professional & scientific | 2014 |
| PJL Engineering Ltd | Professional & scientific | 2021 |
| PJR Mechanical Services Limited | Construction | 2017 |
| PK Mars Medical Ltd | Health & social care | 2020 |
| PKC Asset Management Ltd | Real estate | 2026 |
| PKH Enterprises Limited | Wholesale & retail | 2023 |
| Pksigston Enterprises Ltd | Health & social care | 2009 |
| PL Plumbing and Heating Ltd | Construction | 2021 |
| Plain Clothing Company (Plaincc) Limited | Information & communication | 2013 |
| Plain Material Ltd | Wholesale & retail | 2024 |
| Plainlab Ltd | Professional & scientific | 2025 |
| Plan B Financial Solutions Ltd | Professional & scientific | 2020 |
| Plan Construction Solutions Ltd | Construction | 2013 |
| Planche Property Rentals Limited | Real estate | 2016 |
| Planease Limited | Information & communication | 2026 |
| Planet Profit Limited | Hospitality | 2010 |
| Plannex Ltd | Wholesale & retail | 2020 |
| Planovara Digital Ltd | Information & communication | 2026 |
| Planplace Property Management Company Limited | Administrative & support | 1992 |
| Plantahead UK | Professional & scientific | 2025 |
| Plantar Limited | Real estate | 2020 |
| Plantchief Ltd | Information & communication | 2025 |
| Plantique Manufacturing Ltd | Professional & scientific | 2023 |
| Planware Limited | Professional & scientific | 2001 |
| Plate Circle Ltd | Wholesale & retail | 2025 |
| Platinum Biogenix Ltd | Professional & scientific | 2026 |
| Platinum Nest Properties Ltd | Real estate | 2025 |
| Platinum Pace Couriers Limited | Transport & logistics | 2025 |
| Play 2 Learn Child Care Limited | Education | 2010 |
| Play AID CIC | Education | 2020 |
| Play Soccer Ltd | Wholesale & retail | 2021 |
| Playables Limited | Administrative & support | 2007 |
| Playbook Africa Ltd | Professional & scientific | 2026 |
| Playcafe Group Limited | Hospitality | 2025 |