| Paul Sancaster Accountancy Services Ltd | Professional & scientific | 2004 |
| Pauline Transport Ltd | Transport & logistics | 2025 |
| Pauls Inns Ltd | Hospitality | 2024 |
| Pawfect Supplies Ltd | Wholesale & retail | 2020 |
| PAY2U Limited | Professional & scientific | 2016 |
| Payal Trading Limited | Wholesale & retail | 2024 |
| PB Utility Services Ltd | Construction | 2012 |
| Pb&F Ltd | Construction | 2017 |
| PB72 Holdings Limited | Financial services | 2025 |
| PBD Building Consultancy Limited | Construction | 2025 |
| PBT Mechanical Limited | Construction | 2014 |
| PBW Limited | Professional & scientific | 2022 |
| PC Mechanical Limited | Professional & scientific | 2018 |
| PCG Capital Ltd | Real estate | 2022 |
| PD Engineering Services (North East) Limited | Professional & scientific | 2023 |
| PDH HPL Ltd | Hospitality | 2025 |
| PDP Property Renovation Ltd | Construction | 2025 |
| Peart Access Ramps Limited | Manufacturing | 2004 |
| Peart Fencing Limited | Manufacturing | 2010 |
| Peart Property Limited | Administrative & support | 2010 |
| Pedigree Cuts (Blackhall) Limited | Other services | 2015 |
| Pedigree Cuts (Hartlepool) Limited | Other services | 2015 |
| Pegg Erections Limited | Manufacturing | 2019 |
| Peggland Limited | Real estate | 2016 |
| Pegiis Services Limited | Construction | 2014 |
| Peldaf Ltd | Wholesale & retail | 2025 |
| Pelvic Floor Clinic Hartlepool Ltd | Health & social care | 2026 |
| Penn Property Solutions Ltd | Real estate | 2025 |
| Pennico Properties Ltd | Real estate | 2021 |
| Pennywise Discount Store Limited | Wholesale & retail | 2011 |
| Pentilly Financial Services Limited | Financial services | 2023 |
| People's Meeples (NE) C.I.C. | Health & social care | 2022 |
| Performance Works Limited | Professional & scientific | 2012 |
| Persona Global Media Group Limited | Professional & scientific | 2022 |
| Personaleyez Design Limited | Wholesale & retail | 2013 |
| Perun Entertainment Limited | Professional & scientific | 2025 |
| PES Consultants Limited | Professional & scientific | 2018 |
| PES Solutions Limited | Real estate | 2026 |
| Peter Trainer Logistics Ltd | Transport & logistics | 2025 |
| Peterlee Cricket Club CIC | Education | 2022 |
| Petrichore Ltd | Health & social care | 2022 |
| PETS4PEOPLE Limited | Education | 2020 |
| PF Management Solutions Limited | Professional & scientific | 2023 |
| PGF Properties Ltd | Real estate | 2018 |
| PGS Enterprises Ltd | Professional & scientific | 2024 |
| PGW Quality Services Limited | Professional & scientific | 2026 |
| Phelon & Moore (Engineers) Limited | Professional & scientific | 2021 |
| Philip Elener Limited | Administrative & support | 2008 |
| Phillies Norton Ltd | Hospitality | 2024 |
| Phla Ltd | Administrative & support | 2017 |
| Phoenix Energy (UK) Ltd | Other services | 2003 |
| Phoenix Kickboxing CIC | Arts & recreation | 2022 |
| Phoenix Service Station Ltd | Wholesale & retail | 2026 |
| Photch Limited | Professional & scientific | 2024 |
| PHW Consultancy Services Ltd | Professional & scientific | 2022 |
| Physical FX Limited | Arts & recreation | 2014 |
| Physiofunnels Limited | Administrative & support | 2016 |
| Piercy Investments Limited | Real estate | 2024 |
| Piercy Properties Limited | Administrative & support | 2011 |
| PIG PEN Studios Limited | Administrative & support | 2005 |
| Pinnacle Investments North East Ltd | Real estate | 2025 |
| Piper Technical Services Limited | Professional & scientific | 2007 |
| Pitchbuilder Ltd | Wholesale & retail | 2021 |
| Pitchside Sauna Ltd | Other services | 2026 |
| Pitstop Tyre & Service Centre Ltd | Wholesale & retail | 2024 |
| Pixlmods Ltd | Other services | 2024 |
| Pizza Guys Hartlepool NE Limited | Hospitality | 2024 |
| PJL Inspection Limited | Construction | 2011 |
| PJM Enterprises Ltd | Wholesale & retail | 2020 |
| PKR Hospitality Ltd | Hospitality | 2024 |
| Plan 5 Investments Ltd | Real estate | 2008 |
| Platica 2025 Ltd | Wholesale & retail | 2025 |
| Platinum Studios Limited | Arts & recreation | 2015 |
| Play OUT Hartlepool CIC | Health & social care | 2021 |
| PLE Electrical Services Limited | Construction | 2025 |
| Plough Gardens (Ellington) Management Ltd | Real estate | 2023 |
| PM E&I Engineering Ltd | Professional & scientific | 2024 |
| PMD Projects Limited | Construction | 2013 |
| Podville Ventures Ltd | Real estate | 2025 |
| Point North Ltd | Real estate | 2026 |
| Point Technologies Limited | Professional & scientific | 2002 |
| Polyfoam XPS Limited | Manufacturing | 2016 |
| Pool Resprays Limited | Wholesale & retail | 2000 |
| Pool Together @Home CIC | Administrative & support | 2025 |
| Pool Vehicle Movements Limited | Transport & logistics | 2019 |
| Pools Property Limited | Real estate | 2018 |
| Pools Surplus Stores Limited | Wholesale & retail | 2018 |
| Poppycock Limited | Manufacturing | 2021 |
| Porterhouse Fabrications Limited | Manufacturing | 2017 |
| Pose Hair Salon Ltd | Other services | 2021 |
| Pose Studios Limited | Other services | 2024 |
| Postech Limited | Professional & scientific | 2020 |
| Postfix Limited | Manufacturing | 2012 |
| Postpartum Matters CIC | Health & social care | 2022 |
| Potency Limited | Arts & recreation | 2020 |
| Pout and Foster (N E) Limited | Financial services | 2011 |
| Power and Electrical Services Ltd | Manufacturing | 2016 |
| Powrie Castle Ltd | Households | 2022 |
| PP Inspections Limited | Manufacturing | 2024 |
| Practice What YOU Bleach Ltd | Health & social care | 2026 |