| Plastics 2 U Ltd | Wholesale & retail | 2024 |
| Platinum Aesthetics Limited | Extraterritorial | 2016 |
| Platinum Property Maintenance MK Limited | Real estate | 2020 |
| Playing for Real Limited | Arts & recreation | 2010 |
| Plimmer House Ltd | Real estate | 2025 |
| Plumco Ltd | Information & communication | 2002 |
| Plypal Limited | Manufacturing | 2025 |
| PMA IT Services Limited | Professional & scientific | 2019 |
| PMG Estates Ltd | Real estate | 2024 |
| Pollard and SON Cleaning Services Limited | Administrative & support | 2026 |
| Polymer Compounders Limited | Manufacturing | 1993 |
| Portland Park (Greenhaugh Court) Management Company Limited | Real estate | 2019 |
| Portrack Handling Limited | Professional & scientific | 1991 |
| Portrack Properties Ltd | Real estate | 2017 |
| Portrack Seafreight (Tees) Limited | Transport & logistics | 2026 |
| Portrack Seafreight Limited | Transport & logistics | 1989 |
| Pouch Haus Ltd | Wholesale & retail | 2024 |
| Powlands Property Limited | Real estate | 2020 |
| Pqec Ltd | Professional & scientific | 2022 |
| Pragmatics HG Ltd | Health & social care | 2023 |
| Predator Pursuits Terminal Tackle Ltd | Wholesale & retail | 2024 |
| Premier Interior Solutions Ltd | Manufacturing | 2025 |
| Premier NE Ltd | Wholesale & retail | 2020 |
| Premier Property Portfolio Ltd | Construction | 2016 |
| Premier Trauma and Orthopaedic Services Ltd | Health & social care | 2016 |
| Price Brothers Properties Ltd | Real estate | 2025 |
| Pride Property NE Ltd | Construction | 2020 |
| Primary Maths Hub Ltd | Education | 2022 |
| Prime (NE) Ltd | Construction | 2023 |
| Pritchard Family Partnership LLP | | 2020 |
| Pro Plumbing and Heating NE Ltd | Construction | 2023 |
| Pro Site Delivery Limited | Professional & scientific | 2025 |
| Process Scientific Innovations Limited | Extraterritorial | 1998 |
| Progression Housing CIC | Real estate | 2026 |
| Promag Engineers Ltd | Professional & scientific | 2010 |
| Property Dividend Ltd | Real estate | 2017 |
| Property ZEN Ltd | Real estate | 2019 |
| Property, Procurement & Contracting Services LLP | | 2014 |
| Proqual Industrial Solutions Ltd | Construction | 2024 |
| PROSPEC1 Ltd | Professional & scientific | 2026 |
| Protuition Ltd | Education | 2006 |
| Prout Engineering Ltd | Professional & scientific | 2024 |
| Prout Ltd | Real estate | 2024 |
| Provet Equine Ltd | Manufacturing | 2024 |
| PRS Racing Limited | Administrative & support | 2009 |
| PS Coating Consultants Ltd | Professional & scientific | 2023 |
| PS Property Lets Ltd | Real estate | 2018 |
| PSI Global Ltd | Manufacturing | 1976 |
| PSI Plastics Ltd | Extraterritorial | 2006 |
| PTE Lettings Limited | Real estate | 2026 |
| PTM Family LLP | | 2021 |
| PUG Beautiful Limited | Wholesale & retail | 2014 |
| Purdy Capital Ltd | Professional & scientific | 2021 |
| Purepath Consulting Limited | Professional & scientific | 2025 |
| Purple Door Studio CIC | Arts & recreation | 2023 |
| Purple World Limited | Hospitality | 2005 |
| Pushpamrit Finance Limited | Real estate | 2024 |
| PW Instruments Ltd | Construction | 2020 |
| Q C Engineering Limited | Professional & scientific | 2015 |
| QA (Quality Assured) Drylining Ltd | Construction | 2021 |
| Qcservices Ltd | Professional & scientific | 2023 |
| QM Property Limited | Real estate | 2022 |
| QSI Group Ltd | Professional & scientific | 1999 |
| Quality Inspection and Consultancy Services Ltd | Professional & scientific | 2016 |
| Quartz Living Ltd | Hospitality | 2023 |
| Queensgate Communications Limited | Wholesale & retail | 2002 |
| Quick N Tasty Ltd | Hospitality | 2026 |
| Quinella Place Ltd | Real estate | 2023 |
| R & B Williams WP Ltd | Administrative & support | 2024 |
| R & C Hayley WP Ltd | Administrative & support | 2024 |
| R & L Blass WP Ltd | Administrative & support | 2024 |
| R & N Watts WP Ltd | Administrative & support | 2024 |
| R & S Properties Partnership LLP | | 2019 |
| R and S Junction Road Limited | Real estate | 2016 |
| R Homan Consultancy Limited | Administrative & support | 2025 |
| R M Wilkinson Surveying Limited | Professional & scientific | 2014 |
| R Mundy Limited | Professional & scientific | 2021 |
| R Parker Property Ltd | Real estate | 2014 |
| R Tiltman WP Ltd | Administrative & support | 2024 |
| R Turner WP Ltd | Administrative & support | 2024 |
| R V Wood Ltd | Health & social care | 2015 |
| R&R Document Services Limited | Professional & scientific | 2023 |
| RA Play Limited | Arts & recreation | 2022 |
| Rachael Louise Griffiths Ltd | Health & social care | 2022 |
| Racing:Squared Limited | Information & communication | 2022 |
| Radial Construction Ltd | Construction | 2024 |
| Rahman Family Holdings Limited | Real estate | 2020 |
| Rahman Family Partnership LLP | | 2020 |
| Raise GTM Limited | Professional & scientific | 2023 |
| Rakjam Limited | Wholesale & retail | 2019 |
| RAM Technical Services Ltd | Professional & scientific | 2021 |
| Ramlaul Family Partnership LLP | | 2016 |
| Rams & Engineering Ltd | Construction | 2026 |
| Randolph Estates Limited | Real estate | 2022 |
| Ranworth Holdings LLP | | 2022 |
| Ranworth Property Ltd | Real estate | 2020 |
| Rapido Services Limited | Real estate | 1999 |
| Raven Ventures Ltd | Health & social care | 2016 |
| Ravinder & Cockela Mehra Family Partnership LLP | | 2020 |
| Razar Family Holdings Limited | Real estate | 2018 |