| Pinky Ninjas Limited | Education | 2016 |
| Pitts Presentation Products Ltd. | Manufacturing | 2001 |
| Pivot Commerce Limited | Professional & scientific | 2015 |
| Plain Simple Design Ltd | Wholesale & retail | 2021 |
| Plainsail Engineering Ltd | Professional & scientific | 2026 |
| Planet Contracting Limited | Construction | 1985 |
| Plasson U.K. Ltd | Wholesale & retail | 2006 |
| Plattsville Consultants Limited | Professional & scientific | 2016 |
| Pleasure & Leisure Corporation Ltd | Arts & recreation | 1990 |
| Pley (Proactive Learning) CIC | Education | 2024 |
| Plug and Socket Ltd | Construction | 2012 |
| Plumbed Ltd | Construction | 2024 |
| PMP Properties Limited | Construction | 2001 |
| Podgym Ltd | Arts & recreation | 2026 |
| Polestar Commercials Limited | Wholesale & retail | 2023 |
| Polished Kitchen Designs Limited | Professional & scientific | 2018 |
| Polona Homes Ltd | Real estate | 2011 |
| POP Hoods Limited | Wholesale & retail | 2024 |
| POP Timer Limited | Manufacturing | 2023 |
| Poppycare Health Limited | Administrative & support | 2022 |
| Populus Staffing Co Limited | Administrative & support | 2022 |
| Portcullis Communications Ltd | Information & communication | 2014 |
| Portland Market Development Limited | Real estate | 1990 |
| Posh Pita Ltd | Hospitality | 2025 |
| Post Official Ltd | Transport & logistics | 2024 |
| Pouchlands (NO. 2) Management Company Limited | Households | 1996 |
| Pove Services Ltd | Construction | 2026 |
| PPH Digital Limited | Information & communication | 2016 |
| PR for the People Ltd | Professional & scientific | 2021 |
| Precision Glass Ltd | Manufacturing | 2011 |
| Precision Glass Specialist Ltd | Manufacturing | 2023 |
| Preece Accountancy Limited | Professional & scientific | 2009 |
| Premier Property (Brighton) Limited | Real estate | 2004 |
| Prentech Auto Ltd | Wholesale & retail | 2026 |
| Prestige Bathrooms Sussex Limited | Construction | 2025 |
| Pretty Miniatures Ltd | Manufacturing | 2023 |
| Prevention Hair Loss UK Ltd | Professional & scientific | 2015 |
| Preview Design Limited | Arts & recreation | 1994 |
| Preview Graphics Limited | Arts & recreation | 2004 |
| Preview Visual Communications Group Ltd | Professional & scientific | 2019 |
| Priory Court (Lewes) Limited | Households | 1996 |
| Priory Management (A.B.C.) Limited(The) | Households | 1980 |
| Priory Management (D.E.) Limited(The) | Households | 1980 |
| Priya Yeslavat Limited | Health & social care | 2022 |
| Procurement IT Ltd | Information & communication | 2010 |
| Prolec Property Maintenance Ltd | Construction | 2020 |
| Properties Matter Limited | Real estate | 2023 |
| Property Investment Consultants Ltd. | Real estate | 2000 |
| Property Maintenance People Limited | Construction | 2017 |
| Proto Vehicle Limited | Manufacturing | 2015 |
| Psmc Projects Limited | Construction | 2016 |
| Psychology First Consultancy Limited | Education | 2018 |
| PT With Millie Limited | Education | 2025 |
| Pulse Physiotherapy and Performance Ltd | Health & social care | 2023 |
| Pure Collection Cashmere Limited | Wholesale & retail | 2020 |
| Pure Gadget Ltd | Information & communication | 2022 |
| Pure Prosthetics Limited | Health & social care | 2005 |
| Pure Storm Ltd | Information & communication | 2026 |
| Pureread Ltd | Arts & recreation | 2016 |
| Pursun Properties Ltd | Real estate | 2025 |
| PVL UK Limited | Manufacturing | 2003 |
| PYR Properties Limited | Real estate | 2022 |
| QPD London Ltd | Construction | 2018 |
| Quadrant Group Limited | Professional & scientific | 2001 |
| Quadrant Simulation Systems Limited | Transport & logistics | 2021 |
| Quality Building Services of Sussex Ltd | Construction | 2016 |
| Quartzlock Ltd | Extraterritorial | 2018 |
| Queens Crescent Dental Practice Limited | Health & social care | 2006 |
| Quest Flight Training Limited | Public administration | 1999 |
| Quicksoft Solutions Limited | Information & communication | 2016 |
| Quintessential Travel & Education Ltd | Administrative & support | 2020 |
| Quirkafleeg Limited | Professional & scientific | 2013 |
| R Fish Bar Worlds END Ltd | Hospitality | 2025 |
| R J Bowskill Limited | Health & social care | 2010 |
| R P M Camera Ltd | Information & communication | 2012 |
| R S Hawketts Ltd | Transport & logistics | 2021 |
| R. C Carpentry & Renovations Ltd | Manufacturing | 2022 |
| R. Shed Limited | Construction | 2008 |
| R.D. Lighting Limited | Information & communication | 2011 |
| Rachel Evans Management Systems Limited | Professional & scientific | 2006 |
| Radii Planet Group Bidco Limited | Other services | 2025 |
| Radii Planet Group Limited | Financial services | 2017 |
| Radii Planet Group Management Limited | Financial services | 2018 |
| Radii Planet Group Midco Limited | Other services | 2025 |
| Radii Planet Group Topco Limited | Other services | 2025 |
| Radius Films Ltd | Information & communication | 2011 |
| Raesands Properties Limited | Real estate | 2014 |
| Railway Garage Ltd | Wholesale & retail | 2009 |
| Rainbow Tree Nursery Ltd | Education | 2023 |
| Rainbow Vending Limited | Wholesale & retail | 2003 |
| Rameez Holdings Ltd | Wholesale & retail | 2025 |
| Ramshackle Music Limited | Information & communication | 1974 |
| Randomgiggs Limited | Information & communication | 2025 |
| Range Domestic Services Ltd | Administrative & support | 2020 |
| Range Electrical Services Ltd | Construction | 2015 |
| Rangerunner Ltd | Hospitality | 2012 |
| Raptor Motors Ltd | Wholesale & retail | 2022 |
| Rasr Engineering Limited | Professional & scientific | 2016 |
| Ravenswood Performance Ltd | Wholesale & retail | 2022 |
| Rays GEO Services Limited | Education | 2022 |