| Park and Charge Limited | Transport & logistics | 2018 |
| Parker Gardens Ltd | Other services | 2025 |
| Parkes-Service Limited | Manufacturing | 2013 |
| Parking and Civil Enforcement Development Limited | Other services | 2013 |
| Parklands Keymer Road (Development) Ltd | Construction | 2023 |
| Parkside Apartments RTM Company Limited | Households | 2012 |
| Parkside Lodge Health Care Ltd | Health & social care | 2019 |
| Parkside Podiatry Ltd. | Health & social care | 2024 |
| Parkways Construction Limited | Construction | 2024 |
| Parry Property Services Limited | Real estate | 2015 |
| Parshotam Communications Ltd | Professional & scientific | 2023 |
| Parsifal Enterprises Ltd | Financial services | 2014 |
| Partridge Land Management Ltd | Households | 2019 |
| Pastor Shannon Limited | Financial services | 2025 |
| Paterson Property Services Limited | Administrative & support | 2021 |
| Patient Fitness Limited | Health & social care | 2026 |
| Patrick Shirley Media Limited | Professional & scientific | 2013 |
| Paul Greenyer Consultancy Ltd | Professional & scientific | 2022 |
| Paul Hunt Energy Consulting Ltd | Professional & scientific | 2015 |
| Paul Leeks CAD Services Limited | Professional & scientific | 2004 |
| Paul Lucraft Associates Limited | Administrative & support | 2006 |
| Paul Masson Funerals Ltd | Other services | 2010 |
| Paul Salter Consulting Limited | Professional & scientific | 2023 |
| Paul's Energy Limited | Real estate | 2015 |
| PAW Pens Limited | Administrative & support | 2024 |
| Paws on Track Ltd | Other services | 2019 |
| PAX1 LLP | | 2007 |
| PAX1 Mercantile Ltd | Real estate | 2016 |
| PBO Computing Limited | Information & communication | 2009 |
| PCB Layout Limited | Professional & scientific | 2025 |
| PD Environmental Solutions Limited | Professional & scientific | 2020 |
| PDB Contractors Ltd | Construction | 2011 |
| PE Transformation Partners Ltd | Professional & scientific | 2024 |
| Peachy Film Limited | Information & communication | 2025 |
| Peachy Parrot Ltd | Wholesale & retail | 2019 |
| Pear Organisation Limited | Manufacturing | 2005 |
| Pearl and Groove Limited | Manufacturing | 2013 |
| Pearl Events Atelier Limited | Other services | 2025 |
| Peerless IT Limited | Information & communication | 2007 |
| Pegasis Limited | Information & communication | 2014 |
| Pegasus Balloons Ltd | Wholesale & retail | 2021 |
| Pege Projects Ltd | Construction | 2022 |
| Peking Chef (Sussex) Limited | Hospitality | 2006 |
| Pembury Legal Limited | Administrative & support | 2019 |
| Pencil Learning Limited | Information & communication | 2006 |
| Pencilupnose Limited | Wholesale & retail | 2016 |
| Pendry Living Holdings Limited | Real estate | 2026 |
| Pendry Property Limited | Financial services | 2026 |
| Penfeather Partners Limited | Education | 2016 |
| Penfolds Estate Agents Limited | Real estate | 2018 |
| Penfolds Saddlery Limited | Wholesale & retail | 2021 |
| Penhill Logistics Ltd. | Transport & logistics | 2009 |
| Penland Farm Gardens Limited | Administrative & support | 2017 |
| People ETC Limited | Information & communication | 2000 |
| Perfect Panels S.E. Ltd | Wholesale & retail | 2014 |
| Perfect Tailoring (East Grinstead) Ltd | Other services | 2023 |
| Performance Mortgages Limited | Financial services | 2024 |
| Performian Ltd | Professional & scientific | 2025 |
| Perrin Lighting Ltd. | Information & communication | 2015 |
| Perry Insights Ltd | Professional & scientific | 2025 |
| Perryman Property Ltd | Real estate | 2023 |
| Perrymount Apartments Limited | Real estate | 2024 |
| Perun Global Health Ltd | Professional & scientific | 2025 |
| PES Alehouses Ltd | Hospitality | 2021 |
| Pet Proactive Limited | Information & communication | 2019 |
| Petcover EU Limited | Financial services | 2016 |
| Petkasa Limited | Wholesale & retail | 2026 |
| Petnor Blenders (London & Glasgow) Limited | Professional & scientific | 1939 |
| Petram TF Ltd | Real estate | 2022 |
| Petrika Ltd | Professional & scientific | 2018 |
| Petrus Ventures Limited | Professional & scientific | 2024 |
| Pets 2 Go 2 Limited | Transport & logistics | 2012 |
| PG Renewables Limited | Financial services | 1985 |
| PGK Medical Limited | Real estate | 2012 |
| Phat Beat Productions Limited | Information & communication | 2009 |
| Phelan Catering Limited | Extraterritorial | 2019 |
| Phil Hewitt Associates Limited | Professional & scientific | 2002 |
| Phil Jermyn Designs Ltd | Administrative & support | 2008 |
| Phil King Consulting Ltd | Professional & scientific | 2020 |
| Phil Porter Limited | Arts & recreation | 2017 |
| Philadelphia Evangelical Community of Limeira in Crawley - Apostolic Ministry UK | Other services | 2015 |
| Philippine Dive Holidays Limited | Arts & recreation | 2013 |
| Philpott Consulting Ltd | Professional & scientific | 2024 |
| Phobia to Freedom Ltd | Health & social care | 2022 |
| Phoenix Investments (UK) Limited | Information & communication | 2011 |
| Phoenix Leaf Properties Ltd | Real estate | 2019 |
| Phoenix Media Marketing Ltd | Professional & scientific | 2021 |
| Phoenix Personal Training LLP | | 2010 |
| Phosphorus Records Ltd | Other services | 2019 |
| Photographs Forever Limited | Professional & scientific | 2011 |
| Pickering Events Ltd | Administrative & support | 2014 |
| Pickle and Brine Ltd | Hospitality | 2017 |
| Picts Forge Limited | Agriculture & fishing | 2013 |
| Picture More Limited | Administrative & support | 2008 |
| Pier Lettings (Sussex) Limited | Administrative & support | 2016 |
| Pier Management (Sussex) Limited | Administrative & support | 2016 |
| Pinada Services Limited | Construction | 2015 |
| Pineapple Property Investments Limited | Real estate | 2018 |
| Pines Art Films Limited | Professional & scientific | 2008 |
| Pines Art Productions (UK) Limited | Real estate | 2004 |