| Payroll Payroll Ltd | Professional & scientific | 2024 |
| PB a Investments Ltd | Real estate | 2024 |
| PBJ Medical Ltd | Health & social care | 2015 |
| PBM Svces Limited | Professional & scientific | 2015 |
| PC First AID Limited | Other services | 2006 |
| PCG Projects Limited | Construction | 2015 |
| Pctogo Limited | Other services | 2016 |
| PDM Construct Ltd | Professional & scientific | 2026 |
| PDS Mechanical Ltd | Construction | 2022 |
| Peachy Path to Law Ltd | Education | 2025 |
| Peacock and Thunder Ltd | Professional & scientific | 2016 |
| Peak Lifts Ltd | Manufacturing | 2024 |
| Peake Performance Engineering Ltd | Professional & scientific | 2016 |
| Pear Online Sales Ltd | Wholesale & retail | 2023 |
| Peartree Close Limited | Real estate | 2001 |
| Peartree House Maintenance Company Limited | Households | 1967 |
| PECK7 Ltd | Real estate | 2019 |
| Pecksen Consulting Ltd | Information & communication | 2025 |
| Pedagogy Auras UK Limited | Education | 2010 |
| Peeam Studio Ltd | Professional & scientific | 2025 |
| Peel Properties Essex Limited | Real estate | 2020 |
| Peelico Limited | Information & communication | 2016 |
| Pegasus Utility Services Limited | Construction | 2013 |
| PEM Consultancy Ltd | Professional & scientific | 2025 |
| Penelope Property Solutions Ltd | Real estate | 2018 |
| Penerley Lodge Limited | Health & social care | 2019 |
| Penny for Your Sports Limited | Arts & recreation | 2022 |
| Pennyperch Limited | Information & communication | 2026 |
| Pentagon Build & Services Ltd | Construction | 2018 |
| Peocockmayilaisoftware Ltd | Information & communication | 2024 |
| People and Platform Limited | Information & communication | 2026 |
| Pepe Cleaning Ltd | Administrative & support | 2023 |
| Pepfield Construction Limited | Construction | 2024 |
| Percy Ingle Ltd | Manufacturing | 2021 |
| Perden Lands Limited | Real estate | 1972 |
| Perdiem Solutions Ltd | Extraterritorial | 2024 |
| Perfect Paint Detailing Ltd | Wholesale & retail | 2023 |
| Perfectionist Cleaning Services Ltd | Administrative & support | 2023 |
| Performance Direct Limited | Financial services | 1995 |
| Peri Peri Chicken (London) Limited | Hospitality | 2024 |
| Perio Limited | Health & social care | 2008 |
| Perleka Ltd | Construction | 2024 |
| Permanent SIN Tattoos Ltd | Professional & scientific | 2021 |
| Perpetual Sports Ltd | Arts & recreation | 2023 |
| Perrla Ltd | Health & social care | 2016 |
| Perry Davies Installations Ltd | Construction | 2018 |
| Personalise Limited | Wholesale & retail | 2004 |
| Personalised Physiotherapy Ltd | Health & social care | 2025 |
| Petals by Lukshmi Limited | Wholesale & retail | 2019 |
| Petaxai Ltd | Information & communication | 2024 |
| Peter Best Insurance Services Limited | Financial services | 1988 |
| Peter Henry Knox Ltd | Extraterritorial | 2022 |
| Petru Banica Ltd | Other services | 2017 |
| Pharma Gambit Limited | Professional & scientific | 2025 |
| Pharma Pharma Ltd | Manufacturing | 1999 |
| Pharmaghai Limited | Wholesale & retail | 2020 |
| Pheonix Global Limited | Administrative & support | 2018 |
| Phil Secure Systems Ltd | Administrative & support | 2025 |
| Phipps Burton Limited | Professional & scientific | 2013 |
| Phoebe Holmes Ltd | Real estate | 2024 |
| Phoenix Fire Training & Event Services Ltd | Public administration | 2020 |
| Phosho's Ltd | Health & social care | 2013 |
| Photin Ltd | Professional & scientific | 2022 |
| Phull Design & Build Ltd | Construction | 2004 |
| Phuong Hiep Limited | Other services | 2019 |
| Phyprecious Limited | Health & social care | 2015 |
| Physanalytica Ltd | Information & communication | 2025 |
| Physioanswers Ltd | Health & social care | 2010 |
| Pibi Limited | Financial services | 2025 |
| PIC Interiors Ltd | Construction | 2025 |
| Picture ME Living Limited | Real estate | 2024 |
| Pigment Estates Ltd | Real estate | 2022 |
| Pilot Light Plumbing and Heating Limited | Construction | 2020 |
| Pine Services UK Ltd | Extraterritorial | 2014 |
| Pineapple Care Properties Ltd | Real estate | 2026 |
| Pineapple Care Services Limited | Health & social care | 2017 |
| Pineapple Careers Limited | Administrative & support | 2021 |
| Pink Daisy Prints Ltd | Wholesale & retail | 2024 |
| Pink Pointes Limited | Wholesale & retail | 2015 |
| Pink Scaffolding Limited | Construction | 2011 |
| Pinnacle Academy Ltd | Education | 2021 |
| Pipeline Professionals Ltd | Information & communication | 2025 |
| Pipemech Ltd | Other services | 2020 |
| Piperblue Ltd | Real estate | 2018 |
| Pirani Khoja Ltd | Real estate | 2025 |
| Pitsea Dental Care Ltd | Health & social care | 2006 |
| Pitstop Training Ltd | Education | 2012 |
| Pittagoras Limited | Hospitality | 2017 |
| Pixel Joinery Ltd | Manufacturing | 2023 |
| PJ Essex Communications Ltd | Information & communication | 2016 |
| PJ Houses Ltd | Real estate | 2025 |
| PK Autos (Service & Repairs) Limited | Wholesale & retail | 2017 |
| PKC (Dartford) Limited | Construction | 2008 |
| Pkchilpuri Consultancy Ltd | Professional & scientific | 2019 |
| PKM Consultancy Limited | Professional & scientific | 2016 |
| PKR REC Ltd | Professional & scientific | 2023 |
| PKT Hornchurch Express Ltd | Wholesale & retail | 2022 |
| Plamio Limited | Construction | 2024 |
| Planck Compliance Ltd | Information & communication | 2024 |
| Planet 10 Solutions Ltd | Information & communication | 2011 |