| Pettwood Gardens Management Company Limited | Households | 2005 |
| PF Publishing Ltd | Information & communication | 2021 |
| PFM Transport Ltd | Transport & logistics | 2021 |
| PG Olive OIL Limited | Wholesale & retail | 2023 |
| PGA Drylining Ltd | Construction | 2026 |
| PGJ Properties Limited | Real estate | 2021 |
| Pgmg Services Limited | Professional & scientific | 2000 |
| Pgsa Holdings Limited | Hospitality | 2022 |
| Pgxpasifik Limited | Wholesale & retail | 2024 |
| Phantom Broadcast Ltd | Information & communication | 2023 |
| Phantom Investments Limited | Financial services | 2013 |
| Phase Homes Ltd | Health & social care | 2024 |
| Phase Zero Infrastructures Ltd | Professional & scientific | 2026 |
| Phast Consultants Limited | Professional & scientific | 2016 |
| Pheonix Security Ltd | Administrative & support | 2025 |
| Phibs Ltd | Real estate | 2020 |
| Phil Mcewan Consulting Limited | Professional & scientific | 2022 |
| Phil Osborne Ltd | Health & social care | 2013 |
| Philip Isaac Estates Limited | Real estate | 2024 |
| Philip J Turnbull & SON | | 1995 |
| Philip Management Limited | Arts & recreation | 2014 |
| Philip Stamp & Company Limited | Wholesale & retail | 2000 |
| Phillip Summers Limited | Information & communication | 2012 |
| Phillips & Associates Limited | Professional & scientific | 1998 |
| Phillips and Partners Limited | Financial services | 2024 |
| Phillips Brothers (Woodshavings) Limited | Manufacturing | 1969 |
| Phillips Clinical Systems Advisory Ltd | Professional & scientific | 2026 |
| Phillipsapicella Ltd | Hospitality | 2020 |
| Philson Logistics Limited | | 1996 |
| Philtrum Healthcare Limited | Health & social care | 2024 |
| Phm-Tech Limited | Wholesale & retail | 2017 |
| Phoenix Aerotech Limited | Wholesale & retail | 2024 |
| Phoenix Barbering Academy CIC | Education | 2025 |
| Phoenix Block Ltd | Transport & logistics | 2026 |
| Phoenix Boiler Specialists Ltd | Construction | 2021 |
| Phoenix Car Sales (Ipswich) Limited | Wholesale & retail | 2018 |
| Phoenix Cycleworks Limited | Wholesale & retail | 2016 |
| Phoenix Dynamic Limited | Wholesale & retail | 2025 |
| Phoenix Gynaecology Ltd | Health & social care | 2018 |
| Phoenix Heating Systems Ltd | Wholesale & retail | 2026 |
| Phoenix Progress Alternative Provision Limited | Education | 2025 |
| Phoenix Property Associates Ltd | Real estate | 2012 |
| Phoenix Property EA Ltd | Real estate | 2020 |
| Phoenix Security Limited | Administrative & support | 2023 |
| Phoenix Sign Services Ltd | Other services | 2017 |
| Phoenix Textiles Ltd | Administrative & support | 2017 |
| Phone US Limited | Wholesale & retail | 2018 |
| Phonezxpert Limited | Wholesale & retail | 2023 |
| Phos Cyber Security Ltd | Information & communication | 2026 |
| Phrie Limited | Manufacturing | 2016 |
| Phuture Digital LLP | | 2026 |
| Phyora Limited | Information & communication | 2015 |
| PHYSIO7 Limited | Health & social care | 2010 |
| Physiofixx (East Anglia) Ltd | Health & social care | 2022 |
| Physiofixx (Suffolk) Ltd | Health & social care | 2026 |
| Physioworks Physiotherapy Practice Limited | Health & social care | 2006 |
| PI Business Services Limited | Professional & scientific | 2019 |
| Pianoworks (Suffolk) Ltd | Extraterritorial | 2020 |
| Pibroch Commerce Limited | Extraterritorial | 2022 |
| PIC Trailers Ltd | Administrative & support | 2026 |
| Picador Estates Limited | Real estate | 2019 |
| Piciu BFV Ltd | Transport & logistics | 2018 |
| Pick 'N' PAY (Ipswich) Ltd | Wholesale & retail | 2007 |
| Pick UP Pictures Limited | Information & communication | 2025 |
| Pickacake Limited | Manufacturing | 2019 |
| Pickapack Online Ltd | Wholesale & retail | 2025 |
| Pickering Painting & Decorating Services Ltd | Construction | 2024 |
| Pickwicks Coffee and Tea House Limited | Hospitality | 2010 |
| PIE Performance Ltd | Wholesale & retail | 2010 |
| Pier Avenue Butchers Limited | Wholesale & retail | 2017 |
| Pier Marketing Limited | Professional & scientific | 2008 |
| Pierrot Ltd | Wholesale & retail | 2009 |
| Pieuler Limited | Wholesale & retail | 2016 |
| Piggyback Technologies Ltd | Transport & logistics | 2025 |
| Pilates Works 4 U Limited | Arts & recreation | 2011 |
| Pilateswithsienna Ltd | Arts & recreation | 2024 |
| Pilgrim Cleaners Ltd | Administrative & support | 2025 |
| Pillaretics Ltd | Wholesale & retail | 2024 |
| PIN High Golf & Leisurewear Ltd | Wholesale & retail | 2019 |
| PIN Mill Moorings Ltd | Manufacturing | 1993 |
| Pine Lodge Properties Holding Ltd | Real estate | 2025 |
| Pinebrook Properties Limited | Construction | 2022 |
| Pineview Residential Estate Limited | Real estate | 2020 |
| Pinfall Games Ltd | Information & communication | 2025 |
| Pink TEE Properties Ltd | Real estate | 2021 |
| Pinnacle Automotive Ltd | Wholesale & retail | 2020 |
| Pinnacle Stainless Limited | Manufacturing | 2003 |
| Pinnacle-Sws Ltd | Hospitality | 2015 |
| Pinnock Planks Limited | Wholesale & retail | 2025 |
| Pinok Global Services Limited | Administrative & support | 2025 |
| Pioneer 4 Comms Ltd | Manufacturing | 2017 |
| Pioneer Brickwork & Landscaping Limited | Construction | 2023 |
| Pioneer Pump Limited | Manufacturing | 2001 |
| Pioneer Pump Solutions Ltd | Administrative & support | 2012 |
| Pioneer Sustainable Ltd | Construction | 2006 |
| PIP & Bern Ltd | Information & communication | 2019 |
| Pipe Elec Limited | Professional & scientific | 2024 |
| PIPE2K Ltd | Construction | 2019 |
| Pipedout Ltd | Information & communication | 2020 |
| Pipeline Professional Services Limited | Administrative & support | 2023 |