| Pendant Holdings Limited | Real estate | 2025 |
| Pendoo Ltd | Information & communication | 2023 |
| Pendragon Clothing Limited | Manufacturing | 2024 |
| Pendragon Properties Ltd | Professional & scientific | 2024 |
| Penfold Property Production Ltd | Real estate | 2025 |
| Penfold Stabilised Systems Limited | Information & communication | 2023 |
| Penga Project Ltd | Construction | 2024 |
| Pengshu Ltd | Real estate | 2024 |
| Penguin Airport Cars Ltd | Administrative & support | 2015 |
| Penka Limited | Hospitality | 2021 |
| Penny House Mortgages Ltd | Financial services | 2019 |
| Pension Meetings Limited | Professional & scientific | 2007 |
| Penta Consultancy Services Ltd | Professional & scientific | 2017 |
| Pentagold Limited | Administrative & support | 1997 |
| Pentland Forward Limited | Real estate | 2013 |
| Pentland Park Marine Limited | Wholesale & retail | 1968 |
| Pentney Paper & Converting Solutions Limited | Manufacturing | 2021 |
| Penton a Limited | Real estate | 2020 |
| Penton Consultancy Services Limited | Professional & scientific | 2009 |
| Penton Family Corporations Limited | Real estate | 2017 |
| Penwuds Ltd | Information & communication | 2019 |
| People 20.202 Holding Ltd | Information & communication | 2023 |
| People Healthcare Ltd | Wholesale & retail | 2023 |
| People Technologies Limited | Professional & scientific | 2005 |
| PEP76 Limited | Administrative & support | 2020 |
| Pepco (NO 2) Ltd | Extraterritorial | 2022 |
| Pepco Holdings Ltd | Financial services | 2022 |
| Pepco Properties Ltd | Financial services | 2022 |
| Pepco Strategy Limited | Financial services | 2023 |
| Peperempe Limited | Real estate | 2012 |
| Peponi Estates Limited | Real estate | 2021 |
| Peppy Group (UK) Limited | Manufacturing | 2015 |
| Pepys Close Residents Company (Ickenham) Limited | Real estate | 1984 |
| PER Carat International Limited | Wholesale & retail | 2024 |
| Perceptive Solutions Limited | Construction | 2018 |
| Perceval Chambers Limited | Professional & scientific | 2015 |
| Perch Studios Limited | Information & communication | 2020 |
| Percheron Property Management UK Limited | Real estate | 2022 |
| Percuro Medica Ltd | Manufacturing | 2008 |
| Percy Gardens Worcester Park (Block a) Management Company Limited | Households | 1992 |
| Percy Gardens Worcester Park (Block B) Management Company Limited | Households | 1992 |
| Percy Gardens Worcester Park (Block CEF) Management Company Limited | Households | 1992 |
| Percy Gardens Worcester Park (Block D) Management Company Limited | Households | 1992 |
| Peregrine Forster Consulting Ltd | Health & social care | 2021 |
| Perfec Studios Ltd | Professional & scientific | 2025 |
| Perfect Cuisine Foods UK Limited | Hospitality | 2018 |
| Perfect Glaze Limited | Manufacturing | 1998 |
| Perfect Goods Ltd | Wholesale & retail | 2021 |
| Perfect Hotels Stay Ltd | Real estate | 2024 |
| Perfect House Building Service Ltd | Construction | 2015 |
| Perfect IT Solutions & Services Limited | Information & communication | 2010 |
| Perfect Postcard Limited | Information & communication | 2019 |
| Perfect Sentences Ltd. | Professional & scientific | 2011 |
| Perfect Shelter Properties Limited | Real estate | 2023 |
| Perfect Ventures Limited | Administrative & support | 2008 |
| Perform Limited | Other services | 2019 |
| Performa Construction Limited | Construction | 2011 |
| Performax Chiropractic Ltd | Health & social care | 2024 |
| Perfume Bids Ltd | Wholesale & retail | 2026 |
| Perfumemania Limited | Wholesale & retail | 1982 |
| Perfumez Direct Limited | Wholesale & retail | 2016 |
| Peritus Digitalia Limited | Information & communication | 2013 |
| Peritus Solutions Limited | Administrative & support | 2010 |
| Perl Gifts Ltd | Wholesale & retail | 2017 |
| Permapower Capital Limited | Other services | 2023 |
| Permission Project Limited | Manufacturing | 2023 |
| Perpetual Property Solutions Ltd | Administrative & support | 2016 |
| Perseus & Pegasus Homes Limited | Real estate | 2026 |
| Perseus and Pegasus Incorporation Limited | Administrative & support | 2011 |
| Perseus and Pegasus Properties Limited | Real estate | 2019 |
| Perseverance 1C2S UK Ltd | Professional & scientific | 2025 |
| Persist Construct Ltd | Construction | 2026 |
| Personal Touch Accounts Ltd | Professional & scientific | 2007 |
| Personalised Mortgages Ltd | Financial services | 2025 |
| Perumas Limited | Information & communication | 2011 |
| Peshawai (UK) Ltd | Wholesale & retail | 2017 |
| Pet Genius Productions Limited | Information & communication | 2012 |
| Petal & Bloom Gardens Ltd | Administrative & support | 2025 |
| Peter Brown Plumbing & Heating Limited | Other services | 2017 |
| Peter Christie Accountancy Limited | Extraterritorial | 2011 |
| Peter Eaton (Booksellers) Limited | Real estate | 1949 |
| Peter Hinwood Limited | Wholesale & retail | 1978 |
| Peter Milligan Creations Limited | Arts & recreation | 2011 |
| Peter Moss Leukaemia Medtech Research CIC | Information & communication | 2021 |
| Peter Rolfe Lettings Limited | Real estate | 2009 |
| Peter Services London Ltd | Other services | 2023 |
| Peter's Auto Repairs Limited | Wholesale & retail | 2012 |
| Peterhouse Hellas Limited | Financial services | 2021 |
| Peters H. Developments Ltd | Construction | 2019 |
| Pethan Limited | Real estate | 2015 |
| Petite Street Ltd | Wholesale & retail | 2025 |
| Petpass Global Ltd | Administrative & support | 2026 |
| Petra Investors Ltd | Professional & scientific | 2024 |
| Petrobaz Engineering Limited | Water & waste | 2017 |
| Petrogen Process Solutions and Associates Ltd | Professional & scientific | 2011 |
| Petron Frontier Construction Ltd | Manufacturing | 2023 |
| Petrosan Ltd | Construction | 2025 |
| Petroserve (G B) Limited | Real estate | 2003 |
| Petru Kusnir Construction Ltd | Construction | 2025 |
| Petru Transport Ltd | Transport & logistics | 2018 |