| PR Films Limited | Arts & recreation | 2006 |
| PR Industrial Supplies Limited | Administrative & support | 2024 |
| PR Precision Holdings Limited | Professional & scientific | 2020 |
| PR Project Controls Limited | Administrative & support | 2017 |
| Practeus Ltd | Information & communication | 2017 |
| Practical Logistics Ltd | Construction | 2016 |
| Pragmattic Ltd | Information & communication | 2024 |
| Prarcadian Ltd | Hospitality | 2024 |
| Prashant Kitchen Ltd | Hospitality | 2024 |
| PRB Technical Limited | Professional & scientific | 2013 |
| Precision Ball & Gauge Co. Limited | Manufacturing | 2009 |
| Precision Build Sussex Ltd | Construction | 2010 |
| Precision Forex Limited | Administrative & support | 2017 |
| Precision Homes UK Ltd | Real estate | 2025 |
| Precision Professional Wrestling Academy Ltd | Arts & recreation | 2026 |
| Preferred Syntax Limited | Information & communication | 2016 |
| Premheat Limited | Construction | 2021 |
| Premier Building Consultants Ltd | Construction | 2012 |
| Premier Building Contractors Ltd | Construction | 2024 |
| Premier Domestic Services Ltd | Administrative & support | 2011 |
| Premier Frozen Foods Ltd | Wholesale & retail | 1997 |
| Premier Product Finishing Ltd. | Manufacturing | 1997 |
| Premier Scaffold Limited | Construction | 2022 |
| Premium Inventories Limited | Other services | 2021 |
| Prepress UK Limited | Manufacturing | 2015 |
| Present Day Construction Limited | Construction | 2023 |
| Presh Kitchen and Catering Services Limited | Hospitality | 2025 |
| President Horse Ltd | Hospitality | 2025 |
| Press Counsel PR Ltd | Professional & scientific | 2009 |
| Pressleys Chichester Limited | Wholesale & retail | 2011 |
| Prestige Civils South Ltd | Construction | 2019 |
| Prestige Doors (Southern) Ltd | Manufacturing | 2014 |
| Prestige One Homes Limited | Construction | 2025 |
| Prettycitylondon Ltd | Other services | 2018 |
| PRI Ventures UK Limited | Wholesale & retail | 2026 |
| Price Hospitality Ltd | Hospitality | 2023 |
| Price Jones Electrical Limited | Construction | 2001 |
| Price Jones Properties Ltd | Real estate | 2018 |
| Price Watkins Design Limited | Administrative & support | 1995 |
| Priestly Properties Ltd | Other services | 2017 |
| Prima Wisdom Limited | Wholesale & retail | 2025 |
| Prime Angling Limited | Wholesale & retail | 2016 |
| Prime Crunch Catering Ltd | Hospitality | 2026 |
| Prime Electric Services Ltd | Construction | 2021 |
| Prime Property Holdings Limited | Real estate | 2018 |
| Prime Roofing Southern Limited | Construction | 2023 |
| Prime Source Trading Limited | Wholesale & retail | 2025 |
| Primeheat Sussex Limited | Construction | 2016 |
| Primlane Limited | Households | 1984 |
| Primrose Medical Limited | Health & social care | 2025 |
| Prince Regent's Court (Brighton) Limited | Households | 2001 |
| Principal Plumbing & Heating Ltd | Construction | 2007 |
| Principis Ltd | Professional & scientific | 2015 |
| Print My KIT Ltd | Manufacturing | 2019 |
| Printz Charmin Ltd | Administrative & support | 2009 |
| Priory Fields Management Ltd | Real estate | 2024 |
| Priory Gate (Lancing) Management Company Limited | Households | 1992 |
| Prism Communications & Management Limited | Professional & scientific | 2002 |
| Prism Cosec Limited | Professional & scientific | 2005 |
| Prism Developments Limited | Real estate | 2017 |
| Pristwood Limited | Real estate | 1999 |
| Private EYE Holdings Ltd | Other services | 2007 |
| Pro Earth Holdings Limited | Construction | 2017 |
| Pro Earth Ltd | Professional & scientific | 2013 |
| Pro Electrical Limited | Construction | 2020 |
| Pro Fitness Sales Ltd | Arts & recreation | 2024 |
| Pro Group International Ltd | Professional & scientific | 2004 |
| Pro Player Liaison Limited | Other services | 2018 |
| Pro Property Homes Limited | Real estate | 2021 |
| Pro Sports Images Limited | Professional & scientific | 2014 |
| Pro Ventilation and Plumbing Limited | Construction | 2021 |
| Pro- ACT Security & Care Limited | Health & social care | 2025 |
| Pro-Blast Limited | Administrative & support | 2023 |
| Pro-Line Developments Limited | Construction | 2016 |
| Proactive Business Funding Limited | Financial services | 2020 |
| Proampac London Limited | Arts & recreation | 1996 |
| Proampac UK Limited | Financial services | 2021 |
| Process Post Production Limited | Information & communication | 2019 |
| Procter Cheal Ltd | Real estate | 2023 |
| Procurement Perfection Ltd | Professional & scientific | 2009 |
| Profile Roofing (Worthing) Limited | Construction | 2018 |
| Profile Scaffolding Sussex Ltd | Construction | 2023 |
| Project Associates (South East) Limited | Professional & scientific | 2014 |
| Project Associates Developments Limited | Construction | 2018 |
| Project Baby Limited | Manufacturing | 2011 |
| Project Spartan Limited | Other services | 2015 |
| Project Sphere Consulting Ltd | Professional & scientific | 2021 |
| Projelec Limited | Construction | 2013 |
| Prolongate Limited | Construction | 2025 |
| Promantiz Ltd | Professional & scientific | 2024 |
| Promenade House Limited | Households | 2007 |
| Prominence Catering Ltd | Hospitality | 2024 |
| Promowave Ltd | Wholesale & retail | 2018 |
| Prompt Staffing Ltd | Health & social care | 2019 |
| Propa Talent Electrical Ltd | Construction | 2020 |
| Properax Limited | Financial services | 2025 |
| Property 365 Limited | Real estate | 2023 |
| Property Gene Limited | Administrative & support | 2022 |
| Property Investor Solutions Ltd | Education | 2018 |
| Property PA Sussex Limited | Real estate | 2025 |