| Packaging Solutions Limited | Wholesale & retail | 2023 |
| Packaging Waste Solutions Ltd | Water & waste | 2024 |
| Packart Innovation UK Ltd | Administrative & support | 2024 |
| Paddington Motor Springs Limited | Administrative & support | 1955 |
| Paddocks Green Management Company Limited | Households | 1960 |
| Padox Group Ltd | Construction | 2025 |
| Pakphones Ltd | Wholesale & retail | 2025 |
| PAL IT Solutions Ltd | Professional & scientific | 2018 |
| Palan Foundation | Health & social care | 2011 |
| Palermo CH Ltd | Health & social care | 2024 |
| Palissy Advisors Limited | Administrative & support | 2016 |
| Palladium UK Productions Ltd | Other services | 2024 |
| Palm Beach Suppliers Ltd | Wholesale & retail | 2021 |
| Palm Housing & Co. Ltd | Real estate | 2024 |
| PAM UK Mechanical Ltd | Construction | 2018 |
| Pampisford Development Ltd | Real estate | 2018 |
| Pamrs Properties Ltd | Real estate | 2026 |
| PAN African Water Solutions Limited | Water & waste | 2022 |
| PAN@ Build Ltd | Real estate | 2024 |
| Panait Construction Ltd | Construction | 2023 |
| Panasys Ltd | Information & communication | 2016 |
| Panbrook (Porchester) Limited | Extraterritorial | 2006 |
| Panda Home Repairs Ltd | Construction | 2024 |
| Panda Professional Limited | Information & communication | 2019 |
| Pandas Construct Ltd | Construction | 2020 |
| Panel Perfection Ltd | Wholesale & retail | 2008 |
| Pangbourne (2024) Ltd | Wholesale & retail | 2024 |
| Pani Puri House (PVT) Ltd | Hospitality | 2024 |
| Pankhania Holdings Limited | Financial services | 2019 |
| Panna Consultancy Limited | Administrative & support | 2008 |
| Pannoncorp Ltd | Professional & scientific | 2018 |
| Pantaleon Limited | Health & social care | 2014 |
| Panthera Investments Limited | Real estate | 2024 |
| Panthera Tigris Group Limited | Financial services | 2024 |
| Panwar Properties Ltd | Real estate | 2025 |
| Paolo Santosuosso Ltd | Financial services | 2018 |
| Papa Spice Limited | Manufacturing | 2012 |
| Papillonplumbers Ltd | Construction | 2020 |
| Para Gadget Limited | Wholesale & retail | 2026 |
| Paragon Housing Limited | Construction | 2008 |
| Paramount Engineers Limited | Construction | 2025 |
| Parampara Film Academy Ltd | Information & communication | 2020 |
| Paranam Limited | Professional & scientific | 2012 |
| Parcel Network (London) Limited | Transport & logistics | 2014 |
| Parekh Design Ltd | Professional & scientific | 2025 |
| Parent and Child Fostering Service Limited | Health & social care | 2011 |
| Parents & Community CIC | Health & social care | 2026 |
| Parita Private Ltd | Wholesale & retail | 2025 |
| Park Medical Clinic Limited | Health & social care | 2020 |
| Parker Hospitality Limited | Hospitality | 2017 |
| Parker Lloyd Audit LLP | | 2013 |
| Parkfield Ltd | Real estate | 2024 |
| Parmi Global Ltd | Wholesale & retail | 2026 |
| Parrot Capital Limited | Real estate | 2016 |
| Pars Taste Ltd | Hospitality | 2026 |
| Parshv Trading Limited | Wholesale & retail | 2024 |
| Parshvanath Limited | Wholesale & retail | 2013 |
| Parsons Enterprise Limited | Real estate | 2022 |
| Parsons Green & Bloom Limited | Wholesale & retail | 2026 |
| Part Time Boyfriend Ltd | Wholesale & retail | 2026 |
| Partenopean Group Limited | Hospitality | 2024 |
| Partlet Holdings Limited | Real estate | 2017 |
| Partner and Outcomes Ltd | Information & communication | 2025 |
| Partners ( Hammersmith ) Limited | | 1985 |
| Partnership Properties Limited | Construction | 2014 |
| Party & Evenimente Ltd | Arts & recreation | 2025 |
| Party Wishes Ltd | Wholesale & retail | 2014 |
| Partyman World (Wembley) Limited | Health & social care | 2008 |
| Partymarket.Com Ltd | Information & communication | 2009 |
| Parvez Beauty Limited | Other services | 2017 |
| Passenger Tail-Lift Servicing Ltd | Transport & logistics | 2006 |
| Passion Wheel Coaching Services Limited | Education | 2024 |
| PAT Johnson Ltd | Professional & scientific | 2013 |
| Patel & Brothers Ltd | Wholesale & retail | 2019 |
| Patel Consultancy Services Limited | Information & communication | 2015 |
| Patel Food Chat Ltd | Hospitality | 2025 |
| Patel Fruits & VEG Ltd | Wholesale & retail | 2022 |
| Patel Fruits and Vegetables Limited | Wholesale & retail | 2025 |
| Patel Glazing Ltd | Manufacturing | 2020 |
| Patel Manufacturing Limited | Construction | 2019 |
| Patel Plumbing Limited | Wholesale & retail | 2025 |
| Patel Samaj Petlad ( UK) Ltd | Other services | 2023 |
| Patel Services Ltd | Construction | 2022 |
| Patel Stores Ltd | Wholesale & retail | 2025 |
| Patel's Food Catering Services Limited | Hospitality | 2024 |
| Patel's Kitchen Limited | Hospitality | 2025 |
| Path & Diagnostics Business Supplies Services Ltd | Administrative & support | 2020 |
| Path Accountants Ltd | Professional & scientific | 2022 |
| Pathway Capital Estates Ltd | Real estate | 2022 |
| Pathway Capital Holdings Ltd | Financial services | 2023 |
| Pathway Skills Training Group Ltd | Education | 2026 |
| Patisserie Mahesh Limited | Manufacturing | 2016 |
| Patrick Electrical and Maintenance Ltd | Construction | 2020 |
| Patryk Construction Ltd | Construction | 2025 |
| Patsol Distribution Ltd | Wholesale & retail | 2025 |
| Patterned Digital Limited | Information & communication | 2019 |
| Patterned Tech Ltd | Information & communication | 2023 |
| Patternupldn Limited | Other services | 2024 |
| Paul & Co Civils Ltd | Construction | 2023 |
| Paul Grace Associates Limited | Real estate | 2019 |