| One & One Hair Limited | Other services | 2024 |
| Onefour HQ Ltd | Professional & scientific | 2021 |
| Onward Brazilian JIU Jitsu Ltd | Education | 2022 |
| Opel Creations Ltd | Manufacturing | 2022 |
| Opti Peptides Limited | Wholesale & retail | 2025 |
| Opti-Diesel Limited | Professional & scientific | 2018 |
| Opti-Fuel Ltd | Extraterritorial | 2012 |
| Opticall Yorkshire Ltd | Health & social care | 2020 |
| Optimisehq Ltd | Professional & scientific | 2025 |
| Options Community Limited | Administrative & support | 2015 |
| Oracle Opticians Ltd | Wholesale & retail | 2023 |
| Orca Windows Limited | Construction | 2017 |
| Organisational & Behavioural Insights Ltd | Professional & scientific | 2023 |
| Orionai Ltd | Information & communication | 2026 |
| Orla Civils Limited | Construction | 2020 |
| Otley Bar Co. Limited | Real estate | 2018 |
| Otly Road Convenience Store Ltd | Wholesale & retail | 2024 |
| Otter Insights Limited | Professional & scientific | 2023 |
| OUR Proper Place CIC | Education | 2026 |
| OUR TLC Limited | Health & social care | 2013 |
| OUR TLC Recruitment Limited | Administrative & support | 2013 |
| Outpost Internet Ltd | Information & communication | 2025 |
| Over 2 Hills Limited | Wholesale & retail | 2009 |
| OWL Electrical Services Limited | Construction | 2018 |
| Oxygen Asset Management Limited | Real estate | 2004 |
| Oxygen Investment Management LLP | | 2005 |
| P & G Group Ltd | Manufacturing | 2018 |
| P a Crowther Transportation Limited | Transport & logistics | 2016 |
| P a Richterich 2007 Limited | Administrative & support | 2006 |
| P a Thorpe Holdings Limited | Real estate | 1992 |
| P K Textiles Limited | Manufacturing | 2016 |
| P W Plant Hire Limited | Administrative & support | 2014 |
| P. Greenwood Plumbing & Heating Limited | Administrative & support | 2012 |
| P.A. Thorpe Limited | Administrative & support | 2009 |
| Packetts Holdings Limited | Professional & scientific | 2014 |
| Pactrans Transport and Engineering Limited | Manufacturing | 2022 |
| Pangly & Co Ltd | Real estate | 2024 |
| Papyrus Technical Services Ltd | Wholesale & retail | 2026 |
| Paragon Hustle Ltd | Financial services | 2023 |
| Paramount Living Ltd | Real estate | 2019 |
| Park ST Property Ltd | Real estate | 2023 |
| Park View Business Finance Limited | Financial services | 2016 |
| Parkdale Property Management Services Limited | Real estate | 1997 |
| Parkgate Industries Ltd | Manufacturing | 2023 |
| Parkwood Developments Yorkshire Limited | Construction | 2026 |
| Parsec Solutions Limited | Information & communication | 2011 |
| Participate Projects | Health & social care | 2012 |
| Partline Engineering Limited | Manufacturing | 2013 |
| Partline Limited | Manufacturing | 1995 |
| Party Art Limited | Information & communication | 1995 |
| PAS (Leeds) Ltd | Manufacturing | 2000 |
| Pasha Shisha Shop Ltd | Wholesale & retail | 2025 |
| Pass Estates Ltd | Real estate | 2024 |
| Patlock Limited | Manufacturing | 2011 |
| Paul Harrington Change Management Limited | Information & communication | 2014 |
| Paul Rowlands Limited | Health & social care | 2003 |
| Paxorialabs Ltd | Wholesale & retail | 2026 |
| Payne Inns Ltd | Hospitality | 2024 |
| PD E-Source Limited | Professional & scientific | 2016 |
| Pdjs Consultancy Limited | Administrative & support | 2011 |
| Peace Sports Ltd | Education | 2017 |
| Peachy Aesthetics Ltd | Other services | 2021 |
| Peacock PAY Ltd | Financial services | 2025 |
| Peapod Limited | Financial services | 1996 |
| Peapod Property Holdings Limited | Financial services | 2023 |
| Pearl Parker Properties Limited | Construction | 2020 |
| Pearson Bridge Associates Ltd | Professional & scientific | 2016 |
| Peek PR Ltd | Professional & scientific | 2009 |
| Peel Flock Ltd | Wholesale & retail | 2018 |
| Peel Flooring Limited | Wholesale & retail | 2024 |
| Pegasus North Limited | Real estate | 2021 |
| Pegasus Training Centre Ltd | Education | 2024 |
| Pendlebury's Eyecare Dormant Limited | Health & social care | 1940 |
| Pennine Maintenance Limited | Administrative & support | 2013 |
| Pennrose Roofing Limited | Construction | 2025 |
| Penny and Hayter Opticians Ltd | Wholesale & retail | 2023 |
| Penny Co-Operative Ltd | Information & communication | 2026 |
| Pet Turf Ltd | Wholesale & retail | 2019 |
| Peter Macdonald Recruitment Limited | Administrative & support | 2013 |
| PFP Management Ltd | Real estate | 2015 |
| Pharmruby Limited | Health & social care | 2025 |
| Phelan Properties Limited | Real estate | 2025 |
| PHG Legal Limited | Professional & scientific | 2019 |
| Philmar Components Limited | Financial services | 2009 |
| Philmar Investments Limited | Financial services | 2002 |
| Phoenix Allstars FC CIC | Arts & recreation | 2023 |
| Phoenix Fibres Limited | Manufacturing | 2013 |
| Phoenix Service Solutions Ltd | Professional & scientific | 2014 |
| Physical Impact Kickboxing and Fitness Centre CIC | Arts & recreation | 2021 |
| Physical Impact Kickboxing Bingley Limited | Other services | 2025 |
| Pickles Enterprise Ltd | Real estate | 2025 |
| Pine Lodge Estates Ltd | Real estate | 2019 |
| Pinnacle Performance 4 ALL Community Interest Company | Arts & recreation | 2024 |
| Pioneer Frames Limited | Construction | 2022 |
| Pioneer Plastics Limited | Construction | 2025 |
| Pioneer Properties Yorkshire Limited | Real estate | 2025 |
| Pipeline Partners Ltd | Professional & scientific | 2025 |
| Pitstop Films Ltd | Information & communication | 2022 |
| Pivotal Technical Solutions Ltd | Information & communication | 2019 |
| Pizza 4U Ltd | Hospitality | 2021 |