| OPM Business Services Limited | Manufacturing | 2014 |
| Optimyz Ltd | Professional & scientific | 2025 |
| Orchard Holdings Peterborough Limited | Information & communication | 2019 |
| Ossett Fabrications Limited | Manufacturing | 2012 |
| Ossett Storage Systems Limited | Construction | 2012 |
| Ostrich Angels Limited | Wholesale & retail | 2011 |
| Ottoman Retreat Ltd | Health & social care | 2021 |
| OUR Place-The Hub Community Interest Company | Health & social care | 2025 |
| Overton Engineering Limited | Construction | 2006 |
| Ovlanta Limited | Wholesale & retail | 2026 |
| OWL Medical Communications Ltd | Health & social care | 2012 |
| Ownways Limited | Manufacturing | 1960 |
| Ozone Cooling Solutions Ltd | Administrative & support | 2009 |
| P & J Amato Properties Ltd | Real estate | 2024 |
| P & P Freehold Ltd | Construction | 2025 |
| P a S Mechanical Services Limited | Construction | 2004 |
| P and P Universal Limited | Administrative & support | 2025 |
| P-G Drapes Limited | Manufacturing | 2002 |
| P. a. Welding Limited | Manufacturing | 2003 |
| P. G. O. Properties Limited | Real estate | 2017 |
| PA - Boom Phenomenal Fireworks Limited | Arts & recreation | 1992 |
| PAB Property Group Limited | Real estate | 2024 |
| Paffey Services Ltd | Real estate | 2024 |
| Pagoda Europe Ltd | Professional & scientific | 2012 |
| Paramount Property Development Limited | Construction | 2004 |
| Parc Ferme Consulting Limited | Professional & scientific | 2013 |
| Parcel&Parcel Ltd | Transport & logistics | 2025 |
| Park Mount Property Ltd | Real estate | 2025 |
| Park Riding LLP | | 2011 |
| Parker First Forest Products Limited | Wholesale & retail | 2018 |
| Parkers Landscapes & Construction Limited | Administrative & support | 2009 |
| Parkhead Fisheries Ltd | Hospitality | 2025 |
| Parnaby Removals & Storage Limited | Transport & logistics | 2018 |
| Partnership Cleaning Solutions Limited | Administrative & support | 2009 |
| PARTS4ENGINES Topco Limited | Financial services | 2024 |
| Patrick Darkwa Ltd | Health & social care | 2015 |
| Paul Matthews Architectural Ltd | Professional & scientific | 2015 |
| Paul Merlin Associates Limited | Real estate | 2006 |
| Paul Merlin LLP | | 2010 |
| Payback.Tax Ltd | Administrative & support | 2022 |
| Payroll Partners Ltd | Professional & scientific | 2018 |
| Pbat Ltd | Hospitality | 2025 |
| PCJ Technical Services Ltd | Professional & scientific | 2019 |
| PCO Aviation Limited | Financial services | 2022 |
| Peacock Garage Limited | Wholesale & retail | 2024 |
| Peak Landscapes Ltd | Administrative & support | 2010 |
| Peak Padel Holmfirth Ltd | Manufacturing | 2025 |
| Peakrunners Ltd | Arts & recreation | 2021 |
| Peaks Sports & Business Consulting Ltd | Professional & scientific | 2017 |
| Peel Construction (Yorkshire) Ltd | Construction | 2010 |
| Pelioff SPV1 Ltd | Real estate | 2026 |
| Pennine Academy of Dance Limited | Arts & recreation | 2023 |
| Pennine Fabrics Limited | Wholesale & retail | 2026 |
| Pennine Financial Solutions Ltd | Financial services | 2023 |
| Pennine Gymnastics CIC | Education | 2020 |
| Pennine Health Limited | Health & social care | 2011 |
| Perfect Projects Ltd | Construction | 2018 |
| Performance in Education Ltd | Education | 2023 |
| Performance Project Management Consulting Ltd | Professional & scientific | 2022 |
| Performing Arts Vision Care Ltd | Health & social care | 2024 |
| Peter Dyson & SON Limited | Wholesale & retail | 1971 |
| Peter Kaye Joinery Limited | Construction | 2004 |
| Peter Roberts Holdings Limited | Extraterritorial | 2015 |
| Peter Wilkinson Advisory Limited | Professional & scientific | 2018 |
| Pettican Pipeline Services Ltd | Construction | 2014 |
| PFS Yorkshire Ltd | Professional & scientific | 2018 |
| Pfsa Education Ltd | Education | 2018 |
| Pfsa Football Trials Ltd | Arts & recreation | 2018 |
| Pharm-I-Link Limited | Wholesale & retail | 2010 |
| Pharmaceutical Supplies UK Limited | Manufacturing | 2025 |
| Pheonix Sales & Management Consultancy Ltd | Professional & scientific | 2024 |
| Philip Lodge Limited | Manufacturing | 1998 |
| Philomena Foggs Ltd | Wholesale & retail | 2020 |
| Phoenix Property and Finance Limited | Professional & scientific | 1996 |
| Phoenix Works (Holmfirth) Limited | Real estate | 2017 |
| Photography Leeds Limited | Wholesale & retail | 2014 |
| Photography Manchester Limited | Wholesale & retail | 2005 |
| Phycodurus Limited | Professional & scientific | 2009 |
| PI Partners Limited | Professional & scientific | 1995 |
| Pickles Wealth Management Ltd | Financial services | 2025 |
| Picsave Limited | Professional & scientific | 2013 |
| Pierrepont Ltd | Professional & scientific | 2012 |
| Piling Casing Equipment Manufacturer International Ltd | Professional & scientific | 2023 |
| Pillr Advisory Limited | Professional & scientific | 2025 |
| Pinder Healthcare Limited | Health & social care | 2023 |
| Pineapple IT Solutions Limited | Information & communication | 2005 |
| Pink Fish People Development Ltd | Professional & scientific | 2016 |
| Pinnacletech Consulting Ltd | Information & communication | 2025 |
| PIP Foggs Culinary Larder Ltd | Wholesale & retail | 2025 |
| Pizza Virona Ltd | Hospitality | 2026 |
| PJH Telecom Services Ltd | Information & communication | 2025 |
| PLAN2WIN Limited | Professional & scientific | 2004 |
| Planet Media & Design Limited | Professional & scientific | 2014 |
| Plants in the Holme Ltd | Wholesale & retail | 2022 |
| Platformfor Ltd | Information & communication | 2025 |
| PLB Building & Property Solutions Ltd | Construction | 2024 |
| Plumb Stuff Ltd | Wholesale & retail | 2018 |
| Pneumatic Conveying International Limited | Professional & scientific | 2015 |
| Pneumatic Conveying UK Limited | Professional & scientific | 2015 |
| Pnrlo Consulting Limited | Professional & scientific | 2019 |