| Psalm Properties Limited | Real estate | 2023 |
| PSD Projects Ltd | Construction | 2025 |
| Psea Ltd | Information & communication | 2026 |
| PSG Power Service Group Limited | Construction | 2026 |
| PSH Buildworks Ltd | Construction | 2026 |
| Psiloritis IDA Limited | Hospitality | 2024 |
| PSL Associates Ltd | Health & social care | 2006 |
| Psnl Limited | Administrative & support | 2014 |
| Psnw Enterprises Limited | Real estate | 2023 |
| Pspa Solutions Ltd | Health & social care | 2017 |
| Pstn Ltd | Hospitality | 2022 |
| PSW Builders Ltd | Construction | 2026 |
| PSW Property Investors Ltd | Real estate | 2023 |
| Psypop Limited | Wholesale & retail | 2025 |
| PT + Ltd | Wholesale & retail | 2011 |
| PT Results Limited | Professional & scientific | 2010 |
| PTD Properties Ltd | Real estate | 2025 |
| PTF Procurement Services Ltd | Information & communication | 2016 |
| Ptma Mihailovic LLP | | 2019 |
| Ptpx Ltd | Arts & recreation | 2025 |
| PTS Rail Ltd | Construction | 2018 |
| Pubblicitario Consulting LLP | | 2021 |
| Pubhead Ltd | Information & communication | 2019 |
| Public Sector Procurement Ltd | Professional & scientific | 2015 |
| Public Software C.I.C. | Information & communication | 2016 |
| Public Speakers Corner UK Ltd | Other services | 2022 |
| Pubs ARE US Ltd | Wholesale & retail | 2025 |
| Pudding Lane Properties Limited | Real estate | 2013 |
| Pugachov Limited | Wholesale & retail | 2017 |
| Pullen Associates Limited | Real estate | 2010 |
| Pulse Change Health Care Ltd | Health & social care | 2017 |
| Pulse Creative & Consulting Ltd | Information & communication | 2025 |
| Pulse Creative Services Ltd | Professional & scientific | 2026 |
| Pulse Live Events Ltd | Arts & recreation | 2024 |
| Pulse Photonics Limited | Manufacturing | 1982 |
| Puma Contracting Limited | Administrative & support | 2013 |
| Puma Property Holdings Limited | Real estate | 2025 |
| Puma Property Investments Limited | Real estate | 2025 |
| Pumas Rugby Football Club | Arts & recreation | 2018 |
| Pump House Auctions Limited | Wholesale & retail | 2012 |
| Pump House Specialist Auctions Limited | Wholesale & retail | 2019 |
| Pumped UP Socials Ltd | Professional & scientific | 2024 |
| Pumpkin Consultancy Limited | Professional & scientific | 2007 |
| Pumps N Pipes Ltd | Water & waste | 2023 |
| Punctureseal (Southampton) Ltd | Other services | 2003 |
| Punduction Limited | Information & communication | 2026 |
| Punk Designs Ltd | Professional & scientific | 2014 |
| PUP Strutters Ltd | Other services | 2022 |
| Pups and Hounds Limited | Other services | 2017 |
| Pura Vida Trading Limited | Wholesale & retail | 2015 |
| Puravidawellbeing Ltd | Other services | 2021 |
| Purbeck Valet Limited | Other services | 2011 |
| Purbrook Engineering Ltd | Professional & scientific | 2019 |
| Purcaru Iulian Ltd | Manufacturing | 2018 |
| Purdey Television Ltd | Information & communication | 2018 |
| Purdy and Flynn Ltd | Wholesale & retail | 2025 |
| Pure Beauty by Sarah Ltd | Other services | 2026 |
| Pure Box Limited | Arts & recreation | 2024 |
| Pure Care Lodge Ltd | Health & social care | 2024 |
| Pure City Cleaning Limited | Administrative & support | 2019 |
| Pure Faith Ltd | Health & social care | 2017 |
| Pure Graphics Limited | Arts & recreation | 1989 |
| Pure Human Resources Limited | Administrative & support | 2012 |
| Pure Inspiration Ltd | Administrative & support | 2009 |
| Pure Jewellers Ltd | Manufacturing | 2025 |
| Pure Labels Limited | Wholesale & retail | 2017 |
| Pure Mechanical & Electrical Ltd | Construction | 2025 |
| Pure Moon Limited | Professional & scientific | 2020 |
| Pure Mortgage & Financial Planning LLP | | 2006 |
| Pure Pilates Studio Ltd | Arts & recreation | 2026 |
| Pure Pleasure Ltd | Arts & recreation | 2006 |
| Pure Rehearsal Studios Limited | Administrative & support | 2017 |
| Pure Renovation and Design Ltd | Construction | 2023 |
| Pure Rock Limited | Administrative & support | 2009 |
| Pure Vintage Food Limited | Hospitality | 2022 |
| Pureaquatic Pools Ltd | Construction | 2024 |
| Purehaven Properties Ltd | Hospitality | 2023 |
| Purely Feminine Ltd | Wholesale & retail | 2025 |
| Purely Maldives Limited | Administrative & support | 2009 |
| Purely Trade Windows Limited | Construction | 2025 |
| Puremade Ltd | Wholesale & retail | 2025 |
| Purer Air Limited | Construction | 2026 |
| Purlieu Construction Company Limited | Construction | 1967 |
| Purlieu Holdco Limited | Financial services | 2024 |
| Purple Manta Lifestyle Limited | Arts & recreation | 2026 |
| Purple Mind Consulting Limited | Professional & scientific | 2025 |
| Purple Octopus Holdings Limited | Financial services | 2016 |
| Purple Patch (Hamble) Ltd | Wholesale & retail | 2009 |
| Purple Pelican Ltd | Other services | 2025 |
| Purple Plant Hire Limited | Administrative & support | 2015 |
| Purple Salix Limited | Professional & scientific | 2012 |
| Purple Squad Ltd | Transport & logistics | 2019 |
| Purplelabalaba Limited | Information & communication | 2019 |
| Purpley Agency Limited | Administrative & support | 2021 |
| Purpose Driven Business Limited | Professional & scientific | 2021 |
| Purpose Property (Hampshire) Ltd | Real estate | 2018 |
| Purpose Property Co-Living Limited | Real estate | 2019 |
| Purpose Property Management Limited | Construction | 2013 |
| Purpose Property Sales and Lettings Limited | Real estate | 2022 |
| Pursuit Worldwide Ltd | Wholesale & retail | 2020 |