| Partridge Day Limited | Financial services | 2019 |
| Party Entertainments Ltd | Arts & recreation | 2022 |
| Party Entertainments Sales Ltd | Wholesale & retail | 2025 |
| Pasd Properties Limited | Real estate | 2018 |
| Pase Projects Ltd | Professional & scientific | 2023 |
| Pasini Leisure Limited | Hospitality | 2001 |
| Pasini Limited | Financial services | 2011 |
| Pasini Promotions Limited | Hospitality | 2011 |
| Pass IT Driving Academy Limited | Education | 2021 |
| Pass Performance Ltd | Information & communication | 2011 |
| Passcow Driving School Ltd | Manufacturing | 2022 |
| Passion About Travel Limited | Administrative & support | 2015 |
| Passion Health Care Services Limited | Health & social care | 2021 |
| Passion Transport Limited | Transport & logistics | 2016 |
| Passmore of Colchester Limited | Manufacturing | 2012 |
| Passmore of Southampton Limited | Manufacturing | 2013 |
| Passport M Limited | Extraterritorial | 2009 |
| Paste Inc Ltd | Wholesale & retail | 2020 |
| Pastures Rise Management Company Limited | Households | 1986 |
| Patea Housing Options Ltd | Real estate | 2024 |
| Pateco Management Services Limited | Real estate | 2015 |
| Pathway Consulting Group Limited | Professional & scientific | 2015 |
| Pathway Procurement Limited | Professional & scientific | 2016 |
| Pathways Development Limited | Education | 2011 |
| Patil's Ltd | Hospitality | 2021 |
| Patricia's Clinical Services Ltd | Health & social care | 2026 |
| Patrick Davis Systems Limited | Information & communication | 1997 |
| Patsey DEE Limited | Wholesale & retail | 2020 |
| Pattern Perfect Limited | Construction | 2014 |
| Paul Allen Squash Ltd | Arts & recreation | 2015 |
| Paul B Halsall Limited | Manufacturing | 2017 |
| Paul Cudmore Photography Limited | Professional & scientific | 2003 |
| Paul Ford Marketing Ltd | Professional & scientific | 2025 |
| Paul Grimsey Limited | Construction | 2015 |
| Paul Joel Geological Services Ltd | Professional & scientific | 2022 |
| Paul Johnson Car Valeting Limited | Other services | 2003 |
| Paul R Jackson & Associates (2016) Limited | Financial services | 2005 |
| Paul R Jackson & Associates Limited | Financial services | 2016 |
| Paul Shipton Handyman Services Ltd | Construction | 2016 |
| Paul Thompson Events Ltd | Hospitality | 2016 |
| Paul Todd Driving Services Ltd | Arts & recreation | 2022 |
| Paul Wadey Associates Ltd | Health & social care | 2013 |
| Paul's Cleaning Ltd | Administrative & support | 2021 |
| Paula Haulage Limited | Transport & logistics | 2025 |
| Pavilion Chelmsford Limited | Administrative & support | 2019 |
| Pavilion Colchester Management Company Limited | Households | 2013 |
| Pavilion Homes Ltd | Real estate | 2025 |
| Pavilion Living Properties Ltd | Real estate | 2020 |
| Pavillion View Management Company Limited | Households | 2021 |
| Pavlides Solutions Limited | Administrative & support | 2017 |
| Pavlov Services Ltd | Construction | 2021 |
| Pawsey Family Company Limited | Financial services | 2026 |
| Paxman Limited | Other services | 2019 |
| Payroll - Consult Limited | Information & communication | 2024 |
| Payu Payroll Ltd | Other services | 2021 |
| PB Refurbishments Limited | Construction | 2012 |
| Pballers Ltd | Arts & recreation | 2026 |
| PBD Biotech Limited | Professional & scientific | 2014 |
| PBG Builders Limited | Construction | 2008 |
| PBI 2 Limited | Real estate | 2014 |
| PBR (Southern) Ltd | Professional & scientific | 2018 |
| Pbrn Limited | Real estate | 2017 |
| Pbsgrouplondon Ltd | Wholesale & retail | 2018 |
| Pbsl Bidco Limited | Financial services | 2021 |
| Pbsl Group Limited | Wholesale & retail | 2008 |
| Pbsl Midco Limited | Financial services | 2021 |
| Pbt.Property Investments Limited | Real estate | 2015 |
| Pbuk Estates Limited | Professional & scientific | 2011 |
| PC Doctor Operations Limited | Information & communication | 2005 |
| PC Expeditions Ltd | Information & communication | 2022 |
| PC Help Essex Ltd | Information & communication | 2014 |
| Pc-It Support Ltd | Information & communication | 2022 |
| Pcnow Services Limited | Health & social care | 2011 |
| PD Prestige & Performance Ltd | Wholesale & retail | 2023 |
| PDH Mersh Ltd | Real estate | 2017 |
| PDL Operational Transformation Ltd | Professional & scientific | 2026 |
| PDR Essex Ltd | Wholesale & retail | 2019 |
| PDR Plant Ltd | Construction | 2016 |
| PDR Security Services Limited | Administrative & support | 2024 |
| PE Resources Ltd | Financial services | 2025 |
| Peace Bros Ltd | Transport & logistics | 2018 |
| Peach Guitars Limited | Wholesale & retail | 2006 |
| Peaches at Danbury Limited | Other services | 2002 |
| Peak Commercial Cleaning Ltd | Administrative & support | 2021 |
| Peak Property Staging Ltd | Other services | 2025 |
| Peake Fruit Limited | Manufacturing | 1980 |
| Peake Fruit Prepared Limited | Manufacturing | 1998 |
| Peakmount Limited | Real estate | 1984 |
| Peaksy Property Ltd | Real estate | 2023 |
| Peano Labs Ltd | Information & communication | 2025 |
| Pear Melon Ltd | Information & communication | 2022 |
| Pearce Sargent Financial Planning Limited | Financial services | 2023 |
| Pearl Care Solution Ltd | Other services | 2020 |
| Pearl DRY Cleaners Ltd | Other services | 2013 |
| Pearl Global Foundation Ltd | Other services | 2016 |
| Pearl Homes Holding Ltd | Real estate | 2024 |
| Pearl Management Services Limited | Health & social care | 2016 |
| Pears Accounting Limited | Professional & scientific | 2020 |
| Pearson Investments Limited | Professional & scientific | 2008 |
| Peatling Advisory Ltd | Financial services | 2026 |