| P B L Properties Limited | | 1982 |
| P C Howard Limited | Transport & logistics | 2021 |
| P C LDN Ltd | Manufacturing | 2018 |
| P J Innovations Limited | Manufacturing | 2005 |
| P J Young Building Contractor Limited | Construction | 2025 |
| P J Young Holdings Limited | Construction | 2025 |
| P Lamb Properties Ltd | Real estate | 2017 |
| P Loucas Consulting Ltd | Administrative & support | 2016 |
| P M Chambers Limited | Transport & logistics | 2013 |
| P Mountis Limited | Administrative & support | 2017 |
| P S Tool Supplies Limited | Wholesale & retail | 2023 |
| P Sekutowski Limited | Transport & logistics | 2011 |
| P T Hutchings Anaesthesia Ltd | Health & social care | 2010 |
| P&A Accountancy Services LLP | | 2002 |
| P&A Property Services Limited | Real estate | 2016 |
| P&B Logistics Services Ltd | Transport & logistics | 2017 |
| P&C Commercial Services Limited | Administrative & support | 2026 |
| P&C Holdings Group Ltd | Financial services | 2026 |
| P&D Transport Services Ltd | Transport & logistics | 2019 |
| P&G Bespoke Maintenance Ltd | Construction | 2026 |
| P&J Dispatch Ltd | Transport & logistics | 2018 |
| P&P Parts Ltd | Wholesale & retail | 2026 |
| P&Ro Group Ltd | Wholesale & retail | 2021 |
| P&S Fleet Wash Ltd | Wholesale & retail | 2025 |
| P&W HGV Services Ltd | Transport & logistics | 2020 |
| P. E. Coles Ltd | Construction | 2008 |
| P. J. Slater Scaffolding Services Limited | Construction | 2002 |
| P.A.G.E. Holdings (Peterborough) Limited | Financial services | 2025 |
| P.A.T. (Pensions) Nominee Company NO.1 Limited | Financial services | 2013 |
| P.A.T. (Pensions) Nominee Company NO.2 Limited | Financial services | 2013 |
| P.A.T.(Pensions)Limited | Financial services | 1959 |
| P.D.S. | | 2001 |
| P.E.A.C.E. Living Services Ltd | Health & social care | 2025 |
| P.J.G.Construction (Peterborough) Limited | Construction | 2008 |
| P.L.W. Mills Limited | Agriculture & fishing | 1973 |
| P.P.V. Holdings Limited | Financial services | 2016 |
| P.R. Lancaster Limited | Construction | 2003 |
| P.S.93 Trans Ltd | Transport & logistics | 2022 |
| P.W. Amps Limited | Wholesale & retail | 1957 |
| P1 Auto Service Centre Ltd | Wholesale & retail | 2025 |
| P1RG Limited | Administrative & support | 2022 |
| P3 Multi Traders Ltd | Construction | 2021 |
| P4 Science Limited | Manufacturing | 2025 |
| P7 Motors Limited | Wholesale & retail | 2025 |
| PA Direct Ltd | Administrative & support | 2025 |
| PA Surveys Ltd | Real estate | 2023 |
| Pa-Na-Trans. Ltd | Transport & logistics | 2018 |
| PA02RON Ltd | Wholesale & retail | 2024 |
| Pablito Limited | Transport & logistics | 2022 |
| Pablo G Wagner Ltd | Transport & logistics | 2021 |
| Pace Automotive Ltd | Manufacturing | 2018 |
| Pace Publishing Inc. Limited | Information & communication | 2019 |
| Pachson Limited | Manufacturing | 2015 |
| Packcycle Ltd | Manufacturing | 2026 |
| Packhorse Limited | Manufacturing | 2007 |
| Paco Ltd | Other services | 2007 |
| Pacsat Ltd | Construction | 2025 |
| Pact Finance Ltd | Financial services | 2024 |
| Paddington Flowers Ltd | Wholesale & retail | 2024 |
| Paddypaws Investments Limited | Financial services | 2021 |
| Padel Enterprises Limited | Arts & recreation | 2024 |
| Padel Life Ltd | Education | 2026 |
| Padel Star Arenas Limited | Wholesale & retail | 2025 |
| Padel Stop Ltd | Arts & recreation | 2025 |
| Padj Properties Ltd | Real estate | 2019 |
| Padphone Repair Company Limited | Other services | 2012 |
| Padz Healthcare Ltd | Health & social care | 2023 |
| Page & Saldana Hospitality Ltd | Hospitality | 2016 |
| Pagtogo Consultancy Ltd | Information & communication | 2022 |
| Pair With Pear Ltd | Health & social care | 2025 |
| Pajef Limited | Professional & scientific | 1994 |
| Pakd Ltd | Financial services | 2021 |
| Pakident Ltd | Administrative & support | 2025 |
| Paladi Property Ltd | Real estate | 2025 |
| Paladin Redline Ltd | Professional & scientific | 2018 |
| Palazzo Maratea 1 Limited | Real estate | 2022 |
| Palazzo Maratea 2 Limited | Real estate | 2022 |
| Palazzo Maratea 3 Limited | Real estate | 2022 |
| Palazzo Maratea Penthouse Limited | Real estate | 2024 |
| Pale Waves Touring LLP | | 2017 |
| Paliunas Limited | Transport & logistics | 2011 |
| Pallman Group PLC | Manufacturing | 2022 |
| Pallman Limited | Manufacturing | 2019 |
| Palm Lakes Estate Limited | Real estate | 2022 |
| Palm Produce Limited | Wholesale & retail | 2019 |
| Palm Springs Real Estate Limited | Real estate | 2019 |
| Palmdoc Ltd | Professional & scientific | 2015 |
| Palmer Professional Services Limited | Information & communication | 2016 |
| Palmersoft Limited | Information & communication | 2020 |
| Palmsextra Limited | Wholesale & retail | 2003 |
| Palomas Consults Limited | Health & social care | 2018 |
| Pamela Kilbey Consultancy Limited | Professional & scientific | 2022 |
| PAN Agriculture Ltd. | Agriculture & fishing | 1999 |
| PAN Amenity Limited | Wholesale & retail | 2007 |
| Panache Classic Limited | Wholesale & retail | 2019 |
| Panache Industries Limited | Wholesale & retail | 2019 |
| Panamsat Satellite Europe Limited | Information & communication | 2005 |
| Panas Hospitality Limited | Hospitality | 2024 |
| Panava Club Ltd | Wholesale & retail | 2025 |
| Pancakery Ltd | Wholesale & retail | 2025 |