| Pesto Construction/Planning Ltd | Construction | 2024 |
| Petcarepaw Ltd | Wholesale & retail | 2026 |
| Petcomfortworld Ltd | Wholesale & retail | 2025 |
| Pete Watson Limited | Real estate | 2022 |
| Pete's Cleaning Company Ltd | Administrative & support | 2022 |
| Peter Burke Limited | Health & social care | 2023 |
| Peter Gilbertson & Daughters Limited | Transport & logistics | 2010 |
| Peter Gregory Ltd | Wholesale & retail | 2016 |
| Peter Hodgkinson Plastic Surgery Limited | Health & social care | 2010 |
| Peter Lambert Associates | | 1993 |
| Peter M SIM Ltd | Public administration | 2020 |
| Peter Manning Limited | Professional & scientific | 2010 |
| Peter Mcbeath Ltd | Construction | 2010 |
| Peter Millican Law Limited | Professional & scientific | 2011 |
| Peter Ross Law Firm Limited | Professional & scientific | 2005 |
| Peter Weir Commercials Ltd | Wholesale & retail | 2026 |
| Peterborough Schools Project Limited | Other services | 2006 |
| Peters Mill (Alnwick) Management Company Limited | Households | 2019 |
| Peters Stores PLC | | 1949 |
| Peters Web Limited | Information & communication | 2018 |
| Petivine Ltd | Other services | 2021 |
| Petsercise Boarding Ltd | Other services | 2018 |
| Petsercise Limited | Other services | 2016 |
| Pettle Creative Ltd | Professional & scientific | 2026 |
| PEW PEW Laser Studio Ltd | Other services | 2025 |
| PF Physiotherapy Limited | Health & social care | 2004 |
| Pfne Consultancy Ltd | Construction | 2024 |
| PFR Associates Ltd | Health & social care | 2024 |
| PFS (Newcastle) Limited | Real estate | 2015 |
| PFS Sport LLP | | 2016 |
| PFS Travels Limited | Transport & logistics | 2024 |
| PG Assist Ltd | Professional & scientific | 2007 |
| PG Assist Services Ltd | Professional & scientific | 2015 |
| PG Properties NE Ltd | Real estate | 2024 |
| PG Traderz Ltd | Wholesale & retail | 2025 |
| PGH Ltd | Construction | 2024 |
| PGL (Twelve) Limited | Extraterritorial | 2001 |
| PGT Holdings Ltd | Financial services | 2018 |
| PH 822 Limited | Hospitality | 2024 |
| PH Developments Limited | Construction | 2022 |
| PH Plumbing & Heating NE Limited | Construction | 2021 |
| PH Renovation Limited | Construction | 2024 |
| PHA Limited | Real estate | 2008 |
| Pharmabiotix Limited | Professional & scientific | 2020 |
| PHARMACARE4U Ltd | Wholesale & retail | 2015 |
| Pharmacover Ltd | Health & social care | 2025 |
| Pharmafreight Limited | Transport & logistics | 2000 |
| Pharmakrysto EBT Trustee Limited | Financial services | 2019 |
| Pharmakrysto Ltd | Manufacturing | 2017 |
| Pharmpreneur Limited | Administrative & support | 2025 |
| Phaser Management Limited | Information & communication | 2019 |
| Phayta Ltd | Professional & scientific | 2026 |
| PHD (NE) Limited | Hospitality | 2025 |
| Pheonix IOT (PTY) Ltd | Administrative & support | 2021 |
| PHF Distribution Ltd | Wholesale & retail | 2023 |
| Phhb Ltd | Construction | 2016 |
| PHI PIE Limited | Hospitality | 2016 |
| Phil Hopkins Learning Ltd | Education | 2020 |
| Phil Logistics Limited | Transport & logistics | 2024 |
| Phila Loss Adjusters UK Limited | Financial services | 2019 |
| Philip Barker & Co Limited | Professional & scientific | 2004 |
| Philip Cussins House | Health & social care | 1997 |
| Philip James Shoes Limited | Other services | 2019 |
| Philip Parkinson Homecare Ltd | Health & social care | 2007 |
| Philip Yates Ltd | Health & social care | 2022 |
| Phillips Capital Ltd | Administrative & support | 2018 |
| Phillips Chemists Limited | Wholesale & retail | 2010 |
| Phillips Pet Supplies Limited | Wholesale & retail | 2001 |
| Phillipson Estates Limited | Real estate | 2025 |
| Phinax Services Ltd | Health & social care | 2015 |
| Phoenix Accommodation Services NE Ltd | Real estate | 2023 |
| Phoenix Ashes Real Estate Ltd | Real estate | 2024 |
| Phoenix Business (Energy) Solutions Ltd | Energy | 2026 |
| Phoenix EYE Ltd | Administrative & support | 2007 |
| Phoenix Eyecare Ltd | Health & social care | 2019 |
| Phoenix FM Services Limited | Administrative & support | 2016 |
| Phoenix House (Sunderland) Limited | Construction | 2014 |
| Phoenix IOT (PTY) Ltd | Real estate | 2021 |
| Phoenix Learning Group Limited | Administrative & support | 2020 |
| Phoenix Medicare (NE) Limited | Health & social care | 2015 |
| Phoenix Optical Ltd | Wholesale & retail | 2018 |
| Phoenix Park Property Management Limited | Households | 2023 |
| Phoenix Properties North East Limited | Real estate | 2020 |
| Phoenix Spine and Wellness Ltd | Health & social care | 2025 |
| PHOENIX2 Ltd | Health & social care | 2016 |
| PHOENIX69 Ltd | Other services | 2012 |
| Phone Corner NCL Ltd | Other services | 2025 |
| Phone Corner Newcastle Ltd | Other services | 2017 |
| Phone Essentials Ltd. | Other services | 2011 |
| Phone Planet Newcastle Ltd | Other services | 2023 |
| Phones & Co. Limited | Administrative & support | 2021 |
| Photoline City Limited | Information & communication | 2001 |
| Phrase Path Ltd | Information & communication | 2025 |
| Phulka Limited | Hospitality | 2021 |
| PHY Consulting Ltd | Professional & scientific | 2016 |
| Physical-Performance Limited | Arts & recreation | 2016 |
| Physiohaus Limited | Professional & scientific | 2012 |
| Physiotherapy Matters Ltd | Health & social care | 2006 |
| Physiquepro Ltd. | Arts & recreation | 2024 |
| Picchu Machu Limited | Hospitality | 2024 |