| Pebble Bridge Consultancy and Investment Group Ltd | Professional & scientific | 2019 |
| Peckers Eggs & Dairy Ltd | Wholesale & retail | 2023 |
| Peckers Eggs Ltd | Wholesale & retail | 2023 |
| PED Investment Properties Ltd | Real estate | 2025 |
| Pedesis Solutions Ltd | Information & communication | 2012 |
| Pedigreebase Ltd | Information & communication | 2026 |
| Peeq Ltd | Administrative & support | 2020 |
| Peeq Properties Limited | Real estate | 2021 |
| Pegasus Care Services Ltd | Health & social care | 2023 |
| Pegasus Group Global Ltd | Wholesale & retail | 2023 |
| Pegasus Militaria Ltd | Wholesale & retail | 2025 |
| Peka Nova Ltd | Health & social care | 2026 |
| Peking Chef (Harpenden) Ltd | Hospitality | 2022 |
| Pelican GAS Ltd | Construction | 2019 |
| Pelka Transport Limited | Transport & logistics | 2018 |
| Pellmill Limited | Households | 1972 |
| Pembroke Associates Limited | Professional & scientific | 2022 |
| PEN & Barrow Limited | Professional & scientific | 1993 |
| Pendle Rise Estates Ltd | Professional & scientific | 2004 |
| Penman TM Ltd | Construction | 2025 |
| Pennywise Trading Ltd | Wholesale & retail | 2026 |
| Pennyworld Ltd | Wholesale & retail | 2024 |
| Penoot Ltd | Information & communication | 2026 |
| Penrose Consultancy Limited | Information & communication | 2024 |
| Penrose EA Developments Ltd | Real estate | 2020 |
| Penrose Estate Agents Ltd | Real estate | 2016 |
| Penrose Garden & Building Ltd | Real estate | 2023 |
| Pentagon Estate Ltd | Construction | 2016 |
| Pentaguard IT Ltd | Information & communication | 2025 |
| Pentaroot Ltd | Wholesale & retail | 2025 |
| Penthouse Living Limited | Real estate | 2022 |
| Penwala Properties Ltd | Real estate | 2025 |
| People ACT for Tunisia (Pact) | Education | 2012 |
| People Pro HR Ltd | Information & communication | 2024 |
| People's Park Cafe CIC | Hospitality | 2018 |
| Pepa Construction Ltd | Construction | 2017 |
| Pepe Logistics Ltd | Transport & logistics | 2017 |
| Pepe's Fish Bar Ltd | Hospitality | 2018 |
| Pepnikaj Construction Ltd | Construction | 2025 |
| Pepper Lomax Ltd | Wholesale & retail | 2025 |
| Pepperstock Community Properties | Hospitality | 2020 |
| Perceptronmed Ltd | Professional & scientific | 2025 |
| Perch Surveyors Limited | Professional & scientific | 2021 |
| Pere Cleaning Ltd | Administrative & support | 2026 |
| Perewell Developments Limited | Professional & scientific | 2005 |
| Perfect Aquatics Holdings Limited | Agriculture & fishing | 2016 |
| Perfect Aquatics Ltd | Agriculture & fishing | 2016 |
| Perfect Aquatics Property Limited | Agriculture & fishing | 2016 |
| Perfect Auto-Mechanic Limited | Wholesale & retail | 2023 |
| Perfect Build Developments Ltd | Real estate | 2024 |
| Perfect Choice London Limited | Real estate | 2021 |
| Perfect Planners Events Limited | Administrative & support | 2020 |
| Perfect Property and Investment Ltd | Real estate | 2022 |
| Perfect Smiles Laboratory Ltd | Health & social care | 2013 |
| Perfect Solution 4 House Ltd | Construction | 2020 |
| Perfect Solution for Homes Limited | Real estate | 2019 |
| Perfect Tutoring and Digital Designing Limited | Education | 2026 |
| Perfectly Built Limited | Construction | 2018 |
| Performance Testing Solutions Ltd | Information & communication | 2019 |
| Performance Tuning Solutions Ltd | Wholesale & retail | 2012 |
| Peri Bite Ltd | Administrative & support | 2017 |
| Peri Peri and Pizza Luton Ltd | Hospitality | 2025 |
| Peri Peri Chicken and Pizza Luton Limited | Hospitality | 2024 |
| Peri Peri Pizza and Chicken Ltd | Hospitality | 2024 |
| Peri Peri̇ Junction Chicken and Pizza Ltd | Hospitality | 2025 |
| Peri Shack Limited | Hospitality | 2016 |
| Perioperative Ltd | Health & social care | 2015 |
| Periperiluton Ltd | Hospitality | 2020 |
| Perkons Carpentry Ltd | Construction | 2017 |
| Permac PM Ltd | Real estate | 2025 |
| Perrfection Laser Limited | Other services | 2014 |
| Perrin Brothers Limited | Real estate | 2018 |
| Perry M Jones Limited | Professional & scientific | 2003 |
| Personal Touch Aesthetics Ltd | Other services | 2024 |
| Pert Investments Limited | Financial services | 2026 |
| Pertii Ltd | Wholesale & retail | 2026 |
| Petalpunch Ltd | Manufacturing | 2026 |
| Petar Ichev Ltd | Transport & logistics | 2019 |
| Peter Doherty Electrical Limited | Education | 2015 |
| Peter Gabara K9 Security Limited | Other services | 2021 |
| Peter House Construct Ltd | Construction | 2019 |
| Peter Rayney Tax Consulting Limited | Professional & scientific | 2009 |
| Petersfield New Peking Limited | Hospitality | 2024 |
| Petit Elite Limited | Extraterritorial | 2013 |
| Petrisor Catalin Ltd | Transport & logistics | 2019 |
| Petroleum Motors Ltd | Wholesale & retail | 2025 |
| Petru & SON Trans Ltd | Transport & logistics | 2024 |
| Petru Construction and Home Care Services Limited | Construction | 2023 |
| Petru DAN Craciun Ltd | Construction | 2016 |
| Petrupde Limited | Construction | 2021 |
| Petrus & Alex Bakery Ltd | Manufacturing | 2022 |
| Pettifer Court Management Company Ltd | Real estate | 2024 |
| Pettit Building Services Ltd | Construction | 2019 |
| Pevans Roofing Ltd | Construction | 2024 |
| Pexbar Limited | Real estate | 2018 |
| PFG Design & Developments Ltd | Construction | 2022 |
| PFG Design Limited | Professional & scientific | 2001 |
| PGA Healthcare Limited | Health & social care | 2014 |
| PGB Machinery Ltd | Wholesale & retail | 2024 |
| PGM Grup Services Ltd | Construction | 2019 |