| Protest Sportswear UK Limited | Wholesale & retail | 2021 |
| Protirus UK Limited | Information & communication | 2008 |
| Proto (GB) Ltd | Wholesale & retail | 2009 |
| Protora Limited | Professional & scientific | 2026 |
| Prove IT: Self-Improvement Ltd | Information & communication | 2025 |
| Proven Goods Co Limited | Hospitality | 2020 |
| PROVERBS1616 Ltd | Real estate | 2021 |
| Provic Limited | Wholesale & retail | 2009 |
| PRS Portal Limited | Real estate | 2018 |
| Prsc (NE) Ltd | Wholesale & retail | 2026 |
| Prudhoe Estates LLP | | 2014 |
| Prudhoe Health Ltd | Wholesale & retail | 2024 |
| Prudr&M Ltd | Manufacturing | 2025 |
| Prule Ltd | Hospitality | 2026 |
| PRW Consulting Ltd | Professional & scientific | 2017 |
| Pryke Property Rentals Ltd | Real estate | 2023 |
| Prystn Clean Limited | Administrative & support | 2026 |
| Prystn Group Limited | Financial services | 2026 |
| PS Finance Ltd | Administrative & support | 2025 |
| PS Holding NE Ltd | Real estate | 2024 |
| PS Maan Stores Ltd | Wholesale & retail | 2015 |
| PS Newcastle Ltd | Wholesale & retail | 2017 |
| PS Tipper Hire Ltd | Transport & logistics | 2024 |
| PS2026 Construction Limited | Construction | 2026 |
| PSB Foods Limited | Hospitality | 2022 |
| PSF Academy Limited | Administrative & support | 2025 |
| Pshpropertyuk Ltd | Real estate | 2026 |
| Psscarnation Ltd | Arts & recreation | 2024 |
| Psych One Limited | Real estate | 2017 |
| Psych Two Limited | Health & social care | 2022 |
| Psychemedica Limited | Health & social care | 2025 |
| Psychic Pizza LLP | | 2015 |
| Psychological Consultancy RC Ltd | Health & social care | 2017 |
| Psychological Professionals’ Development Hub Ltd | Education | 2023 |
| Psychologist & Counselling Limited | Health & social care | 2019 |
| Psychology for Peak Performance Ltd | Health & social care | 2023 |
| Psychology Services Bhogal (PSB) Limited | Education | 2022 |
| Psychrep UK Limited | Other services | 2019 |
| Psynapse (Psychological Services) Limited | Professional & scientific | 1981 |
| PT2HOME Limited | Wholesale & retail | 2018 |
| Ptech SRA Trading Company Limited | Wholesale & retail | 2025 |
| PTI Marketing Technologies Limited | Information & communication | 2003 |
| Ptpal Ltd | Information & communication | 2024 |
| PTR Electrical Ltd | Other services | 2017 |
| PTW Energy Solutions Ltd | Professional & scientific | 2025 |
| Public Impact Limited | Professional & scientific | 1999 |
| Public Value Limited | Financial services | 2014 |
| Puccini Newcastle Ltd | Hospitality | 2023 |
| Puckster Limited | Manufacturing | 2022 |
| Pulham & Sons(Coaches)Limited | Transport & logistics | 1949 |
| Pulmobiomed Ltd | Professional & scientific | 2020 |
| Pulse Diagnostics Limited | Health & social care | 2005 |
| Pulse Padel Ltd | Wholesale & retail | 2025 |
| Pumphreys Blues Cafe Ltd | Administrative & support | 2019 |
| Punnoose Associates Limited | Health & social care | 2019 |
| Puppetship Community Interest Company | Arts & recreation | 2006 |
| Puppy Pitt Properties Ltd | Extraterritorial | 2023 |
| Purch IT Limited | Information & communication | 2019 |
| Purchon Chiropractic Ltd | Health & social care | 2010 |
| Purdey Productions Limited | Real estate | 2017 |
| Pure Asset Finance Limited | Professional & scientific | 2017 |
| Pure Color Ltd | Wholesale & retail | 2010 |
| Pure Connection 1 Ltd | Construction | 2024 |
| Pure Financial Consultants Ltd | Administrative & support | 2022 |
| Pure Orthodontics Ltd | Health & social care | 2017 |
| Pure Panel Management Limited | Administrative & support | 2010 |
| Pure TEC Detailing Limited | Wholesale & retail | 2022 |
| Pure Tech Guys Ltd | Wholesale & retail | 2025 |
| Pureink 2 Limited | Administrative & support | 2010 |
| Pureink 3 Limited | Administrative & support | 2011 |
| Pureink Limited | Administrative & support | 2008 |
| Purely Students Estate Agents Limited | Real estate | 2019 |
| Purenorthdigital Limited | Information & communication | 2025 |
| Purfectly Clean Household Services Ltd | Administrative & support | 2025 |
| Purified Nutrition Limited | Wholesale & retail | 2024 |
| Purple Atlas Limited | Real estate | 2021 |
| Purple Elephant Properties Limited | Real estate | 2015 |
| Purple Hound Limited | Wholesale & retail | 2020 |
| Purple Lemon Recruitment Ltd | Administrative & support | 2023 |
| Purple Newcastle Limited | Health & social care | 2019 |
| Purple Tiger Group (Holdings) Ltd | Administrative & support | 2026 |
| Purple Tiger Stays Ltd | Hospitality | 2026 |
| Purple Tiger Travel & Events Ltd | Administrative & support | 2026 |
| Purple Yolk Designs Limited | Information & communication | 2025 |
| Purpose Driven Media UK Ltd | Administrative & support | 2025 |
| PURPOSE28 Mortgage & Protection Advice Ltd | Financial services | 2025 |
| PURPOSE28 Wills & Estate Planning Ltd | Financial services | 2026 |
| Pushologies Interactive Limited | Information & communication | 2022 |
| Puthens Healthcare Ltd | Health & social care | 2017 |
| PV Ifry Ltd | Real estate | 2025 |
| Pvogue Limited | Wholesale & retail | 2025 |
| Pvolta Ltd | Construction | 2026 |
| PW (NE) Limited | Manufacturing | 2013 |
| PW Antelope UK Limited | Financial services | 2020 |
| PW Green UK Limited | Transport & logistics | 2018 |
| PXD Limited | Professional & scientific | 2011 |
| Pyeroy Limited | Extraterritorial | 1973 |
| Pyke (JHC) | Financial services | 2021 |
| Pynadath Limited | Health & social care | 2014 |
| Pyramid NE Limited | Construction | 2020 |