| P&T Enterprise Ltd | Real estate | 2025 |
| P. J. Collins Limited | Construction | 2018 |
| P3D Ltd | Information & communication | 2007 |
| P5 Limited | Information & communication | 1997 |
| P57 Limited | Real estate | 2016 |
| PA Surveyors Ltd | Professional & scientific | 2019 |
| Pabisiak Dental Limited | Health & social care | 2026 |
| Pabjam Music Ltd | Information & communication | 2017 |
| Pace Coffee Ltd | Manufacturing | 2023 |
| Packe Holdings Ltd | Administrative & support | 2010 |
| Packwood Limited | Construction | 1999 |
| Padel Republic Limited | Arts & recreation | 2024 |
| Padelpartneriq Ltd | Information & communication | 2026 |
| Padwells Ltd | Households | 2016 |
| Page and Simpson Trading Ltd | Wholesale & retail | 2012 |
| Paige & Co South East Limited | Professional & scientific | 2026 |
| Paige Associates South East Limited | Professional & scientific | 2026 |
| PAL Consultancy Limited | Professional & scientific | 2019 |
| Palace Properties Management Limited | Construction | 1990 |
| Palatal Working Services Limited | Health & social care | 2019 |
| Palette and Bristle Ltd | Other services | 2024 |
| Palm Gourmet Limited | Hospitality | 2013 |
| Palmeira Global Limited | Professional & scientific | 2011 |
| Palmeira Grande Freehold Company Limited | Administrative & support | 2008 |
| Palmeira Grande Management Company Limited | Real estate | 2003 |
| Palmeira Limited | Real estate | 2018 |
| Palmeira Plaza Freehold Company Ltd | Real estate | 2011 |
| Palmeira Plaza Management Company Ltd | Real estate | 2011 |
| Palmeira Square Dental Clinic Ltd | Extraterritorial | 2025 |
| Palmer & Harvey Limited | Extraterritorial | 1993 |
| Palmeria Food and Wine Ltd | Wholesale & retail | 2018 |
| Palmers Investments | Financial services | 2020 |
| Pamdi LLP | | 2010 |
| Pamela Fletcher Aesthetic Treatments Limited | Health & social care | 2021 |
| Pantheon Mortgages Limited | Financial services | 2024 |
| Panthya Ltd | Wholesale & retail | 2026 |
| Papa Alpha Zulu Ltd | Administrative & support | 2017 |
| Papaya Tree Limited | Financial services | 2020 |
| Paper & Pixels Creative Ltd | Administrative & support | 2018 |
| Paperclip EOT Limited | Professional & scientific | 2024 |
| Paperclip Holdings Limited | Financial services | 2016 |
| Papex Ltd | Manufacturing | 2025 |
| Pappachinoz Pizza Limited | Hospitality | 2023 |
| Parallax Music Ltd | Arts & recreation | 2014 |
| Parallax Soho Limited | Information & communication | 2017 |
| Paraquatics Limited | Agriculture & fishing | 2025 |
| Pardonthenonsense Limited | Construction | 2015 |
| Pardus Bridge Recruitment Ltd | Administrative & support | 2025 |
| Pargects Limited | Professional & scientific | 2025 |
| Parissi & Hall Limited | Hospitality | 2005 |
| Park Avenue Holdco Limited | Real estate | 2024 |
| Park House (Hove) RTM Company Limited | Households | 2021 |
| Park View Global Ltd | Financial services | 2014 |
| Park View Residents Management Company Limited | Households | 1993 |
| Park West Holdings Limited | Professional & scientific | 2016 |
| Parker & Lawrence Growth Advisory LLP | | 2024 |
| Parker LEE Ltd | Administrative & support | 2014 |
| Parkgrove Care Limited | Financial services | 2017 |
| Parkhouse Benner Ltd | Information & communication | 2019 |
| Parking Professionals Limited | Administrative & support | 2009 |
| Parklands (Hassocks) Management Limited | Households | 1974 |
| Parklands (Hassocks) RTM Company Limited | Households | 2016 |
| Parklands House Management Company Limited | Households | 2024 |
| Parks Medical Supplies Limited | Wholesale & retail | 2018 |
| Parkview Care Homes Limited | Health & social care | 1999 |
| Parkway Enterprises (UK) Limited | Real estate | 2002 |
| Parmdent Limited | Health & social care | 2012 |
| Parnell Consultants Limited | Information & communication | 2024 |
| Parochial Mews & Flats Courtyard Limited | Households | 2004 |
| Parq Brighton Ltd. | Households | 2019 |
| Parsons Heating & Bathrooms Limited | Water & waste | 2015 |
| Party Knights Robots Ltd | Hospitality | 2025 |
| Pass & Move Projects Limited | Professional & scientific | 2024 |
| Pass NOW With Noshy Ltd | Education | 2022 |
| Pass the Keys Brighton Ltd | Households | 2020 |
| Pasta & Pizza AZZ Ltd | Hospitality | 2024 |
| Pastel Bioscience Limited | Professional & scientific | 2002 |
| Patagonia Advisors Ltd | Professional & scientific | 2025 |
| Patagonia Properties Holdings Ltd | Financial services | 2023 |
| Patagonia Properties Ltd | Administrative & support | 2016 |
| Patagonia Rental Holdings Ltd | Financial services | 2023 |
| Patagonia Rental Ltd | Real estate | 2017 |
| Patchway Solar (Bristol) Limited | Energy | 2016 |
| Patel & Brownlow Solutions Ltd | Information & communication | 2025 |
| Paterson Consulting Limited | Financial services | 2018 |
| Patientpod Limited | Information & communication | 2013 |
| Patisserie 43 Ltd | Wholesale & retail | 2025 |
| Pattern Haus Holdings Limited | Financial services | 2026 |
| Pattern Haus Ltd | Professional & scientific | 2023 |
| Patternpuss Ltd | Arts & recreation | 2021 |
| Paul Andrew Estates Ltd | Households | 2024 |
| Paul Bridges Creative Ltd | Arts & recreation | 2009 |
| Paul Coggins Plumbing Ltd | Construction | 2019 |
| Paul Grinyer Associates Ltd | Construction | 2018 |
| Paul Hyett Special Make UP Effects Limited | Information & communication | 2006 |
| Paul Mitchell Roofing Limited | Construction | 2008 |
| Paul Taylor Home Improvements Limited | Construction | 2002 |
| Paulcriss Food to Go Ltd | Hospitality | 2020 |
| Pavilion Asset Holdings Limited | Extraterritorial | 2010 |
| Pavilion CC Ltd | Professional & scientific | 2019 |