| Penny Court 22 Limited | Real estate | 2017 |
| Penny Farthing Gallery Limited | Wholesale & retail | 2011 |
| Penny Maintenance Ltd | Other services | 2021 |
| Pennyrato Ltd | Administrative & support | 2023 |
| Pennyrepairs Ltd | Other services | 2024 |
| Pennys Cars Ltd | Transport & logistics | 2021 |
| Penrose Residential Properties Limited | Real estate | 2024 |
| Penrux Limited | Manufacturing | 2016 |
| Pentagraph LLP | | 2022 |
| Pentangle MB Limited | Wholesale & retail | 2009 |
| Pentatonic Marketing Ltd | Professional & scientific | 2014 |
| Penton Hook Holdings Limited | Construction | 1928 |
| Penton Lodge Estate LLP | | 2011 |
| Pentridge Consulting Limited | Real estate | 2013 |
| Penwith Electrical Ltd | Construction | 2024 |
| Peony Star Ltd | Hospitality | 2026 |
| Peony Sun Ltd | Hospitality | 2023 |
| People Architects Ltd | Professional & scientific | 2023 |
| People Place Nature Ltd | Professional & scientific | 2018 |
| People Power Energy Ltd. | Energy | 2016 |
| People Prospect Solutions Ltd | Administrative & support | 2002 |
| People.Culture.Journey Limited | Professional & scientific | 2021 |
| Peoplefirst Partners Ltd | Administrative & support | 2026 |
| Peoples Main Care Services Ltd | Health & social care | 2025 |
| Pepper Enterprises Ltd | Wholesale & retail | 2015 |
| Peppercorn Developments Limited | Construction | 2004 |
| Pepperline Management Ukeig | | 2008 |
| Pepten Store LLP | | 2025 |
| Perbury (Developments) Limited | Construction | 1962 |
| Perbury Limited | Professional & scientific | 1980 |
| Percival Drake Limited | Administrative & support | 2002 |
| Peregrine KIN Limited | Manufacturing | 2023 |
| Perera & Sons Ltd | Wholesale & retail | 2013 |
| Perfect Dayze Limited | Wholesale & retail | 2017 |
| Perfect Easy Move Ltd | Real estate | 2026 |
| Perfect Flow Solutions Limited | Information & communication | 2011 |
| Perfect Holdings Limited | Financial services | 2017 |
| Perfect Home and Office Solutions Ltd | Real estate | 2010 |
| Perfect Pear Beauty Ltd | Other services | 2024 |
| Perfect Pear Brazilian Aesthetics Ltd | Other services | 2015 |
| Perfect Point Dental Limited | Manufacturing | 2025 |
| Perfect Supply Limited | Wholesale & retail | 2003 |
| Perfect Window Cleaning Limited | Administrative & support | 2010 |
| PERFECT2TRADE Ltd | Wholesale & retail | 2019 |
| Perfection Plus Limited | Manufacturing | 2004 |
| Perfectly Imperfect Coffee Limited | Wholesale & retail | 2022 |
| Perfectly Poppy Ltd | Other services | 2022 |
| Perfectum Tempus Ltd | Wholesale & retail | 2024 |
| Performance Powertrain Solutions Limited | Wholesale & retail | 2014 |
| Performance Race Yachts Limited | Wholesale & retail | 2016 |
| Performance Rigging Limited | Administrative & support | 2003 |
| Peri Music Ltd | Education | 2024 |
| Perimeter Fencing and Gates Limited | Manufacturing | 2025 |
| Period Projects UK Limited | Construction | 2007 |
| Perious Limited | Hospitality | 2025 |
| Peritus IT Consulting Limited | Information & communication | 2010 |
| Peritus Regulatory Consulting Ltd | Professional & scientific | 2025 |
| Perkis Limited | Financial services | 2025 |
| Perla Rosa Kitchen & Bathrooms Ltd | Professional & scientific | 2025 |
| Perlco Limited | Hospitality | 2025 |
| Perlins Community Project Limited | Health & social care | 2009 |
| Perlins Project Limited | Health & social care | 2002 |
| Permapark Ltd | Hospitality | 2025 |
| Pernta Ltd | Health & social care | 2016 |
| Peron Hire Limited | Administrative & support | 2022 |
| Persian Burger Southampton Ltd | Hospitality | 2025 |
| Persian Paradise Southampton Ltd | Wholesale & retail | 2024 |
| Personal Fitness Pro Limited | Health & social care | 2015 |
| Personal Training for Everyday Living Ltd | Arts & recreation | 2022 |
| Personal Training With Adele Ltd | Arts & recreation | 2024 |
| Personify AI Limited | Information & communication | 2024 |
| Perspective Communications Ltd | Information & communication | 2012 |
| Perspective Facilities Limited | Administrative & support | 2018 |
| PES (Bristol) Limited | Professional & scientific | 2009 |
| Pestkill Limited | Administrative & support | 2005 |
| Pet Boarding (UK) Ltd | Other services | 2005 |
| Pet Boxes Ltd | Wholesale & retail | 2018 |
| Pet Care Group Ltd | Other services | 2005 |
| Pet Care Holdings Limited | Other services | 2005 |
| Pet Carers Ltd | Other services | 2009 |
| Pet Sitting Angels Limited | Other services | 2021 |
| Petals of Balham Ltd | Wholesale & retail | 2019 |
| Petcu Constructions Ltd | Construction | 2021 |
| Pete Elliott Photography Limited | Professional & scientific | 2023 |
| Pete King Mechanical Repairs Limited | Wholesale & retail | 2007 |
| Pete Luffman Consulting Limited | Information & communication | 2014 |
| Peter a. Bryant (Professional DRY Cleaner) Limited | Other services | 1983 |
| Peter Bolke Design Limited | Professional & scientific | 2017 |
| Peter Clarke Solicitors LLP | | 2012 |
| Peter Concrete Construction Ltd | Construction | 2025 |
| Peter Cooper (Fareham) Limited | Professional & scientific | 1990 |
| Peter Farkas Limited | Professional & scientific | 2024 |
| Peter Horner Ltd | Information & communication | 2022 |
| Peter Press Limited | Professional & scientific | 1971 |
| Peter Spencer Holdings Limited | Professional & scientific | 1987 |
| Peter Street Property Limited | Real estate | 2022 |
| Peter TM Limited | Construction | 2023 |
| Peters & MAY Global Logistics Limited | Transport & logistics | 2009 |
| Peters & MAY Group Limited | Transport & logistics | 2009 |
| Peters & MAY Limited | Transport & logistics | 1988 |