| Phil Barker Haulage Limited | Transport & logistics | 2002 |
| Phil Bush Limited | Wholesale & retail | 2007 |
| Phil Morgan Carpentry Limited | Construction | 2011 |
| Philip Freeman Clerking Services Limited | Administrative & support | 2018 |
| Phoenix Carbon Limited | Water & waste | 2020 |
| Phrame Ltd | Information & communication | 2023 |
| Pindrop Limited | Information & communication | 2009 |
| Pips Skips Limited | Water & waste | 2011 |
| Pitch Labs Limited | Information & communication | 2014 |
| Pixelated Noise Ltd | Information & communication | 2014 |
| PJ Walker Ltd | Construction | 2022 |
| PJC Pharma Consulting Limited | Professional & scientific | 2009 |
| Plain English Design Limited | Manufacturing | 1995 |
| Plans (Suffolk) Ltd | Administrative & support | 2022 |
| Plashwood Interiors Limited | Manufacturing | 2025 |
| Plastic Culture Ltd | Wholesale & retail | 2026 |
| Pleiades Consulting Services Limited | Professional & scientific | 2020 |
| PM Goonan Limited | Administrative & support | 2010 |
| POINT85 Ltd | Professional & scientific | 2014 |
| Pontalis Ltd | Professional & scientific | 2019 |
| Poplar Hill 1974 Limited | Extraterritorial | 2015 |
| Popular Limited | Wholesale & retail | 2016 |
| Porch Holdings Ltd | Real estate | 2018 |
| Portable Space Limited | Administrative & support | 2002 |
| Potash Nursery Limited | Agriculture & fishing | 2017 |
| Power Link Liverpool Ltd | Construction | 2025 |
| Power Property Management Ltd | Real estate | 2019 |
| Powerhouse Heating & Plumbing Services Ltd | Construction | 2026 |
| Powsupps Ltd | Wholesale & retail | 2024 |
| PPN Ipswich Ltd | Administrative & support | 2016 |
| Pragmatica IT Ltd | Information & communication | 2025 |
| PRE Aime Ltd | Wholesale & retail | 2024 |
| Prebus Limited | Construction | 2018 |
| Prediktiko Limited | Extraterritorial | 2021 |
| Premier Instant Management Services Limited | Professional & scientific | 2003 |
| Premier Tree Care Limited | Agriculture & fishing | 2014 |
| Premium Retail Sales Ltd | Wholesale & retail | 2025 |
| Prentice Property Alliance Limited | Real estate | 2019 |
| Prestige Landscapes Cambridge Ltd | Other services | 2018 |
| Prestigious Education Limited | Education | 2024 |
| Pretty in INK Tattoos Ltd | Other services | 2022 |
| PRISM121 Ltd | Professional & scientific | 1996 |
| Produced by Alex Ltd | Professional & scientific | 2015 |
| Product Ventures Limited | Professional & scientific | 2021 |
| Project Forty Eight Ltd | Construction | 2019 |
| Project K Consulting Limited | Professional & scientific | 2025 |
| Project-A Limited | Administrative & support | 2005 |
| Propagationmatters Limited | Extraterritorial | 2009 |
| Proper Tea Construction Limited | Construction | 2022 |
| Properly Ltd | Professional & scientific | 2022 |
| Properly Technologies Ltd | Information & communication | 2023 |
| Properly Trading 1 Limited | Financial services | 2025 |
| Properly Trading Ltd | Real estate | 2022 |
| Property Bros Essex Ltd | Real estate | 2024 |
| Property Bros Suffolk Ltd | Real estate | 2026 |
| Property Guardian Group Limited | Real estate | 2026 |
| Prorustica Limited | Professional & scientific | 2004 |
| Protec Marine Ltd | Construction | 2022 |
| Protec Plumbing Ltd | Construction | 2021 |
| Protek Safety Ltd | Professional & scientific | 2026 |
| PRV Consultancy Ltd | Professional & scientific | 2019 |
| PSR UK | | 2000 |
| PTR Properties Limited | Real estate | 2026 |
| PTR Solutions Limited | Professional & scientific | 2023 |
| Punch Bowl Community Inn CIC | Hospitality | 2010 |
| Pure Connection Limited | Information & communication | 2025 |
| Purple Office Ltd | Real estate | 2019 |
| Pvelkov Ltd | Transport & logistics | 2025 |
| Pwaconsultants Limited | Real estate | 2025 |
| Q-Sky Property Holdings Limited | Real estate | 2020 |
| Q-Sky Serviced Accommodation Limited | Real estate | 2021 |
| Q42 Consulting Limited | Professional & scientific | 2011 |
| Qutub Limited | Wholesale & retail | 2022 |
| R & J Insuclad Limited | Construction | 2003 |
| R J M Body Repairs Limited | Wholesale & retail | 2006 |
| R Macrae Properties Limited | Real estate | 2025 |
| R Mayes Construction Limited | Construction | 2009 |
| R P & S Wickenden Limited | Wholesale & retail | 2003 |
| R S Drew Limited | Health & social care | 2003 |
| R Tomlinson (Holding) Limited | Financial services | 2018 |
| R Tomlinson Limited | Wholesale & retail | 2018 |
| R&D Automotive Apparel Ltd | Wholesale & retail | 2024 |
| R&D Events (Suffolk) Ltd | Arts & recreation | 2020 |
| R&R Refurbishments Limited | Construction | 2019 |
| R&S Playground Installation Ltd | Construction | 2023 |
| R.J.Hearn Electrical Limited | Construction | 2013 |
| R.M.I. Engineering Limited | Manufacturing | 2005 |
| Rachel Marsh Limited | Professional & scientific | 2007 |
| Radmore Investments Limited | Financial services | 2025 |
| Raisin D'Ebt Limited | Wholesale & retail | 2024 |
| Ramc Taxi Limited | Transport & logistics | 2024 |
| Raptor Logistics Group Limited | Financial services | 2023 |
| Rattlesden Fireworks Company Limited | Arts & recreation | 2023 |
| RAY Goudy Holdings Ltd | Financial services | 2023 |
| RAY Goudy Ltd | Manufacturing | 2017 |
| RBK Distribution Ltd | Wholesale & retail | 2024 |
| RC East of England Ltd | Wholesale & retail | 2019 |
| Rdpgolf Performance Ltd | Wholesale & retail | 2022 |
| Re-Production Productions Limited | Arts & recreation | 2018 |
| Reallyverynice Ltd | Wholesale & retail | 2015 |