| OS Golf Ltd | Arts & recreation | 2009 |
| Osborne and Lawn Ltd | Real estate | 2024 |
| Osborne Flats (Filey) Limited | Real estate | 1965 |
| Oswald T. Hall Limited | Real estate | 1947 |
| OTE Ventures Ltd | Real estate | 2025 |
| OTO Reports Ltd | Health & social care | 2025 |
| Ourhaus Property Ltd | Real estate | 2018 |
| Ourkidfirst Limited | Professional & scientific | 2019 |
| Ourtec Limited | Professional & scientific | 2015 |
| OUT of Office Limited | Professional & scientific | 2003 |
| Outbak Bars Ltd | Hospitality | 2006 |
| OWL and the Beaver Limited(The) | Real estate | 1972 |
| OX Heating Limited | Construction | 2021 |
| Oxley Works Ltd | Professional & scientific | 2022 |
| P & M Wright Ltd | Real estate | 2025 |
| P & R Energy Limited | Energy | 2011 |
| P E Marine Limited | Agriculture & fishing | 2021 |
| P&M Simpson Investments Limited | Financial services | 2022 |
| P. Brusby & SON Limited | Construction | 2003 |
| P. Presland Ltd | Manufacturing | 2014 |
| Palmview Limited | Real estate | 2001 |
| Pangea Events Limited | Professional & scientific | 2005 |
| Papaloopa Limited | Information & communication | 2017 |
| Paper Plane Counselling Ltd | Health & social care | 2018 |
| Paradise One Limited | Wholesale & retail | 2019 |
| Paragon International Freight Services Limited | Transport & logistics | 2002 |
| Parcelvolt Limited | Transport & logistics | 2021 |
| Park Lane Storage Ltd | Transport & logistics | 2026 |
| Park Maul Holdings Limited | Real estate | 2016 |
| Parkers Nightclub | | 1998 |
| Parkland (Beverley) Limited | Real estate | 2018 |
| Parkview Flats (Hull) Limited | Real estate | 1977 |
| Parrot Signs Ltd | Manufacturing | 2024 |
| Pathway UK Consultancy Limited | Professional & scientific | 2024 |
| Patrick Stokes and Co Limited | Real estate | 2021 |
| Pattison Bros. (Fruiterers) Limited | Other services | 1964 |
| Paul Butler (Plasterers) Limited | Construction | 2003 |
| Paul Edwards Builders Limited | Construction | 1988 |
| Paul Green Funeral Service Limited | Other services | 2024 |
| Paul Knight Modelmaker Ltd | Information & communication | 2020 |
| Paul RAW (Farrier) Limited | Agriculture & fishing | 2015 |
| Paul Reid Aviation Limited | Transport & logistics | 2017 |
| Paul Robinson Agriculture Ltd | Professional & scientific | 2016 |
| Paula Cullen Limited | Other services | 2018 |
| Pave Properties Limited | Real estate | 2025 |
| PB Building & Renovations Limited | Construction | 2016 |
| PB Wealth Planning Ltd | Financial services | 2024 |
| PD Property Group Ltd | Real estate | 2020 |
| Peak Accounting Limited | Professional & scientific | 2008 |
| Peak Plumbing and Heating Services Ltd | Construction | 2021 |
| Peaky Painters Ltd | Construction | 2022 |
| Pearson Bespoke Joinery Ltd | Manufacturing | 2023 |
| Pearson Park Ltd | Real estate | 2017 |
| Peasy E&I Services Limited | Construction | 2016 |
| Pegasus Property Holdings Ltd | Extraterritorial | 2015 |
| Pelotonco Limited | Arts & recreation | 2020 |
| Pema Holdings Ltd | Other services | 2024 |
| PEN and COB Clothing Ltd. | Wholesale & retail | 2024 |
| Penguins EGG Ltd | Extraterritorial | 2017 |
| Penguins EGG Studio Ltd | Professional & scientific | 2024 |
| Pensa Consulting Limited | Professional & scientific | 2012 |
| Perfect 32 Dental Care Limited | Health & social care | 2021 |
| Perfect Health Group Limited | Health & social care | 2021 |
| Perfecting Conversations Limited | Professional & scientific | 2018 |
| Performance Bushes Ltd | Manufacturing | 2024 |
| Perspective Coaching & Consultancy Ltd | Professional & scientific | 2018 |
| Peter Coyne Independent Funeral Service Limited | Other services | 2014 |
| Peter Manners Limited | Administrative & support | 1999 |
| Peter Norton Plumbing, Heating & GAS Services Limited | Construction | 2002 |
| Peter Ward Homes Limited | Construction | 1983 |
| Peter White Agricultural Engineers Ltd | Professional & scientific | 2011 |
| Pethick & Co. Limited | Extraterritorial | 2001 |
| Pethicks Ltd | Wholesale & retail | 2002 |
| PF Management Services Limited | Administrative & support | 2003 |
| PG Windology Ltd | Manufacturing | 2026 |
| Phab Standard Limited | Other services | 2009 |
| Pharaohs Medical Limited | Health & social care | 2004 |
| Pharmaesthetics Limited | Administrative & support | 2017 |
| Pharmshop Packaging Limited | Administrative & support | 2017 |
| Pheasant Stays Limited | Hospitality | 2023 |
| Phoenix Power Equipment Limited | Wholesale & retail | 2008 |
| Phone & PC FIX Ltd | Other services | 2021 |
| Phosporlink Ltd | Information & communication | 2026 |
| Phpt Limited | Arts & recreation | 2012 |
| Pickering Property Developers Ltd | Construction | 2025 |
| Piece of York Limited | Wholesale & retail | 2024 |
| PIG and Potato Limited | Hospitality | 2015 |
| Pingperfect Ltd | Information & communication | 2013 |
| Pink Dancewear Limited | Wholesale & retail | 2019 |
| Pink Parrot Party (Scunthorpe) Limited | Hospitality | 2023 |
| Pinkdean Ltd | Hospitality | 2003 |
| Pinnacle Security Services Limited | Administrative & support | 2011 |
| Pipe Dreams (Yorkshire) Limited | Wholesale & retail | 2020 |
| Pipe Dreams Classic Cars Limited | Wholesale & retail | 2026 |
| Pippa Brown Limited | Professional & scientific | 2004 |
| Pippa Caley Limited | Other services | 2014 |
| Pita Box UK Ltd | Hospitality | 2019 |
| Pizza FES Limited | Hospitality | 2017 |
| Pjps Bespoke Windows Ltd | Construction | 2024 |
| PJS Electrical and Alarm Services Limited | Construction | 2003 |