| Paul Robinson & SON Ltd | Construction | 2023 |
| Paul Showell Window Cleaning Services Limited | Administrative & support | 2013 |
| Paul Turner Associates Limited | Professional & scientific | 2002 |
| Paula's Bakery Brixton Ltd | Hospitality | 2024 |
| Paulina Care and Support Services Limited | Health & social care | 2024 |
| Paupet Limited | Health & social care | 2014 |
| Pavic & Co Ltd | Construction | 2017 |
| Pavs Express (UK) Ltd | Wholesale & retail | 2017 |
| Pawfect Day Pet Care Ltd | Other services | 2024 |
| Pawsey Management Services Limited | Other services | 2018 |
| Paxx Ltd | Wholesale & retail | 2012 |
| PAY WIZ Limited | Administrative & support | 2016 |
| PB Finances Limited | Financial services | 2026 |
| Pbborisov Ltd | Transport & logistics | 2015 |
| Pbit Ltd | Professional & scientific | 2016 |
| Pbode Ltd | Education | 2026 |
| Pcvh Property Limited | Real estate | 2024 |
| Pdex Global Enterprise Ltd | Information & communication | 2025 |
| PDQ Rotor Limited | Administrative & support | 2011 |
| Peace of Mind Property Management Ltd | Real estate | 2022 |
| Peach (Contractors) Limited | Real estate | 1968 |
| Peak Multimedia Ltd | Professional & scientific | 2021 |
| Pearce Managerial Limited | Professional & scientific | 2016 |
| Pearce Properties Investments Limited | Professional & scientific | 2015 |
| Pearl Acoustics Limited | Manufacturing | 2013 |
| Pearl Health Limited | Health & social care | 2013 |
| Pearl Systems International Limited | Administrative & support | 2015 |
| Pearlington Ltd | Construction | 2025 |
| Pearls With Meshell Ltd | Wholesale & retail | 2020 |
| Pearté Group Ltd | Manufacturing | 2025 |
| Peck's Group Ltd | Construction | 2019 |
| Pecks Homes Ltd | Construction | 2020 |
| Pedrocchi and Company Limited | Health & social care | 2013 |
| Pega Limited | Wholesale & retail | 2006 |
| Pegasus Electronics Limited | Manufacturing | 2019 |
| Pegasus Kent Ltd | Wholesale & retail | 2015 |
| Pegasus South East Limited | Wholesale & retail | 2025 |
| Pelco Lettings Ltd | Real estate | 2024 |
| Penderleath Property Management Ltd | Real estate | 2025 |
| Pendland Limited | Real estate | 2002 |
| Pendland Trading Limited | Hospitality | 2004 |
| Penny Farrar Consultancy Limited | Professional & scientific | 2017 |
| Penny Power U.K Limited | Professional & scientific | 2021 |
| Penny-Brew Ltd | Wholesale & retail | 2025 |
| Pentascape Limited | Administrative & support | 2014 |
| Pentiq Limited | Information & communication | 2016 |
| People Forward HR Ltd | Professional & scientific | 2025 |
| People United | Information & communication | 2006 |
| Pepperony Limited | Construction | 2017 |
| Percepi Knowledge Limited | Education | 2018 |
| Perch Fernwood Properties Ltd | Real estate | 2025 |
| Perfect Healthcare Solution Limited | Administrative & support | 2023 |
| Perfectly Posh Events Ltd | Hospitality | 2018 |
| Performance Raceworks Limited | Wholesale & retail | 2022 |
| Perigon Associates Limited | Administrative & support | 2020 |
| Perilfree Limited | Professional & scientific | 2021 |
| PERKO28 Ltd | Transport & logistics | 2019 |
| Perksworks Joinery Ltd | Construction | 2025 |
| Permark Gifts & Cards Ltd | Wholesale & retail | 2025 |
| Perrys Perfect Cleaning Limited | Other services | 2019 |
| Persist Track and Logistics Ltd | Manufacturing | 2022 |
| Persona Cosmetic Medicine Limited | Other services | 2002 |
| Perthshire Property Ltd | Real estate | 2026 |
| Peter B Creative Limited | Professional & scientific | 2024 |
| Peter Jacobs Holdings Limited | Financial services | 2023 |
| Peter Marriott & Co Ltd | Construction | 1999 |
| Peter Stanley Training Limited | Education | 2008 |
| Peters Heating Services Ltd | Construction | 2025 |
| Peters Properties Kent Limited | Real estate | 2012 |
| Petersedge Limited | Construction | 2025 |
| Petopia Ltd | Wholesale & retail | 2026 |
| Pettitts Building Maintenance Limited | Construction | 2002 |
| PF Motor Trade Ltd | Wholesale & retail | 2025 |
| PG Signalling Installations Ltd | Construction | 2014 |
| Phantomhive Hospitality Ltd | Hospitality | 2025 |
| Pharma Regulatory Support Services Limited | Professional & scientific | 2011 |
| Pharmalytic Limited | Professional & scientific | 2023 |
| Pharmo Holdings Ltd | Real estate | 2020 |
| Phase One Hairline Ltd | Other services | 2012 |
| Phelps Logistic Solutions Ltd | Transport & logistics | 2024 |
| Philia Health Care Services Ltd | Health & social care | 2015 |
| Phoebe Property & Investment Ltd | Real estate | 2021 |
| Phoenix & JAY Properties LLP | | 2022 |
| Phoenix 123 Ltd | Households | 2017 |
| Phoenix 78 Ltd | Extraterritorial | 2017 |
| Phoenix DM Limited | Arts & recreation | 2012 |
| Phoenix Marine Limited | Transport & logistics | 2018 |
| Phoenix Marine Ship Services Limited | Transport & logistics | 2024 |
| Phoenix Mews Ltd | Households | 2017 |
| Phone Parts Express Ltd | Wholesale & retail | 2013 |
| Phono Group Ltd | Information & communication | 2015 |
| Photo Bombing Limited | Arts & recreation | 2015 |
| Photo Chic Co Ltd | Professional & scientific | 2025 |
| Photo Memories Limited | Professional & scientific | 2007 |
| PHS Commercial Cleaning Ltd. | Other services | 1999 |
| Physician Associate Recruitment Solutions Limited | Administrative & support | 2013 |
| Pickhill Investments Limited | Professional & scientific | 2015 |
| Pickle and Moos Limited | Wholesale & retail | 2026 |
| Picklejar Media Ltd | Information & communication | 2022 |
| Pierre Plantard Technologies Ltd | Information & communication | 2025 |