| One North Group Ltd | Financial services | 2019 |
| One Oak Management Company Limited | Households | 1963 |
| One SIX One Development Ltd | Real estate | 2020 |
| One Source International UK Branch Ltd | Wholesale & retail | 2021 |
| Onepay Group Limited | Financial services | 2026 |
| Onepay Limited | Administrative & support | 2011 |
| Opco Leisure Limited | Hospitality | 2019 |
| OPG Services Limited | Administrative & support | 2025 |
| Ophia Holdings Ltd | Professional & scientific | 2021 |
| Optilume Limited | Professional & scientific | 2021 |
| Optiwork AI Limited | Information & communication | 2025 |
| Opus Commercial Services Limited | Construction | 2021 |
| Opus Construct and Supply Limited | Administrative & support | 2021 |
| Orange Shark Developments Ltd | Construction | 2023 |
| Ornamental Nursery Holdings Ltd | Financial services | 2018 |
| Ornamental Trees Holdings Limited | Financial services | 2022 |
| Ornamental Trees Limited | Wholesale & retail | 2012 |
| Ottoman Pacific Limited | Professional & scientific | 1988 |
| Outdoor Heritage Kitchens Limited | Construction | 2024 |
| Outdoor Living Garden Design Ltd | Administrative & support | 2021 |
| Ownwork Limited | Education | 2025 |
| Oxford Oak Development Limited | Construction | 2012 |
| P & M Property Ltd | Construction | 2016 |
| P DE Biasio Properties Limited | Real estate | 2018 |
| P J H Property Services Limited | Construction | 2003 |
| P J Powell Limited | Professional & scientific | 2024 |
| P Smith Cardio Ltd | Health & social care | 2017 |
| P T Enterprise Limited | Financial services | 2004 |
| P.A.Thorpe (UK) Limited | Wholesale & retail | 2014 |
| Paice Stephenson Limited | Professional & scientific | 2025 |
| Pain Relief Services (Yorkshire) Limited | Real estate | 2010 |
| Pale Face Concierge Services Limited | Administrative & support | 2017 |
| Palette Gallery Limited | Wholesale & retail | 2026 |
| Palma (UK) Limited | Transport & logistics | 1996 |
| PAN Y Aqua Velo Europe Limited | Information & communication | 2013 |
| Panama Properties LLP | | 2019 |
| Panda Koala Europe Limited | Wholesale & retail | 2025 |
| Parable Global Limited | Professional & scientific | 2016 |
| Parable Limited | Professional & scientific | 2017 |
| Paragon Court Ltd. | Households | 1991 |
| Parallel 53 Limited | Professional & scientific | 2010 |
| Parcel Partner Ltd | Transport & logistics | 2009 |
| Parcel Partners (Leeds) Ltd | Transport & logistics | 2019 |
| Park Place Asset Management (ST. Oswald's) Limited | Real estate | 2013 |
| Park Place Asset Management Limited | Real estate | 2012 |
| Park Rose Village Limited | Hospitality | 2009 |
| Park Rose Village NO:1 Limited | Professional & scientific | 2011 |
| Parkes Properties Ltd | Real estate | 2017 |
| Parkridge Ltd | Real estate | 2025 |
| Parsons Meadow Management Company Limited | Households | 2021 |
| Passion Into Profit Limited | Extraterritorial | 2015 |
| Patience Healthcare (CDT) Ltd | Real estate | 2025 |
| Patience Healthcare (NE) Ltd | Health & social care | 2022 |
| Patience Healthcare Group Ltd | Financial services | 2021 |
| Paul Chapman Limited | Construction | 2013 |
| Paul Fryers Consulting Ltd | Professional & scientific | 2026 |
| Payfect Ltd | Financial services | 2020 |
| PBT Holdings Ltd | Financial services | 2020 |
| PBT Real Estates Ltd | Real estate | 2020 |
| PCH Engineers Limited | Professional & scientific | 2022 |
| PCS Trade UK Ltd | Wholesale & retail | 2019 |
| Pdaviation Ltd | Education | 2026 |
| PE20 Limited | Other services | 2018 |
| Peaces Services Ltd | Education | 2019 |
| Peacock Ventures Ltd | Real estate | 2025 |
| Peak Recruitment Ltd | Administrative & support | 2021 |
| Peak Transformation Coaching Ltd | Professional & scientific | 2024 |
| Pease House Ltd | Real estate | 2016 |
| Pebble Beach Waves Ltd | Real estate | 2024 |
| Pendle Sportswear Limited | Wholesale & retail | 2011 |
| Pennine Signs Limited | Manufacturing | 2007 |
| Pentire UK (1902) Ltd | Professional & scientific | 2024 |
| Pentlandhorizons Ltd | Real estate | 2011 |
| Perry Mcgee's National Tracking School Ltd | Professional & scientific | 2012 |
| Peter Durbin & Company Limited | Professional & scientific | 2003 |
| Phillips Special Projects Limited | Construction | 2008 |
| Phmg Investments Limited | Households | 2020 |
| Phoenix Response Group Ltd | Other services | 2021 |
| Phoenix Response Services Limited | Transport & logistics | 2019 |
| Phoenix Response Vehicle Support Limited | Administrative & support | 2019 |
| Photography Hub Limited | Information & communication | 2008 |
| Photoilkley Ltd | Administrative & support | 2025 |
| Physio Action Limited | Health & social care | 2003 |
| Physiocure Ltd | Health & social care | 2023 |
| PI Healthcare Holdings Limited | Professional & scientific | 2018 |
| PI Healthcare Limited | Professional & scientific | 2011 |
| Pick Talent Ltd | Administrative & support | 2023 |
| Pierson Limited | Real estate | 2023 |
| Piggin Ranch Limited | Arts & recreation | 2002 |
| Piglet Properties Limited | Real estate | 2025 |
| Pillarmount Properties Limited | Real estate | 2025 |
| Pineapple BD Ltd | Hospitality | 2023 |
| Pines (Ilkley) Limited(The) | Households | 1983 |
| PINGPONG4U CIC | Other services | 2019 |
| Pinion Consulting Limited | Professional & scientific | 2020 |
| Pinnacle Graphic Design Limited | Manufacturing | 2001 |
| Pinnacle Partners (Leeds) Ltd | Professional & scientific | 2025 |
| Pinnacle Structural Solutions Ltd | Professional & scientific | 2018 |
| Pinpoint Technologies Limited | Professional & scientific | 2025 |
| Piran Group Ltd. | Professional & scientific | 2015 |