| ON TOW Ltd | Wholesale & retail | 2015 |
| One BOY Media Limited | Information & communication | 2021 |
| One Call Couriers Limited | Transport & logistics | 2015 |
| One of One Accountancy Limited | Professional & scientific | 2022 |
| One Step Closer Events Limited | Administrative & support | 2016 |
| One-Stop Care for YOU Ltd | Health & social care | 2017 |
| Onfire Agency Limited | Professional & scientific | 2010 |
| Online Digital Excellence Solutions Ltd | Wholesale & retail | 2025 |
| Only Privileged Limited | Health & social care | 2025 |
| Onward Holdings Limited | Construction | 1932 |
| Onward Refinishing Services Limited | Wholesale & retail | 1994 |
| Onward Yorkshire Ltd | Financial services | 2024 |
| Opening the Book Limited | Construction | 2000 |
| Opportunity Marketing Ltd | Professional & scientific | 2012 |
| Optimusmps Limited | Administrative & support | 2020 |
| Opus Laundry Ltd | Wholesale & retail | 2025 |
| Orange FOX Housing Ltd | Real estate | 2024 |
| Orange FOX Properties Ltd | Real estate | 2023 |
| Orca Connect Ltd | Wholesale & retail | 2021 |
| Orchard Gate Consulting Limited | Information & communication | 2018 |
| Ossema Ltd | Transport & logistics | 2019 |
| OUT of Place Arts CIC | Arts & recreation | 2024 |
| Ovaro Search Limited | Administrative & support | 2026 |
| Overdrive Club Limited | Wholesale & retail | 2020 |
| Ovosna Limited | Information & communication | 2021 |
| Owdo Ltd | Professional & scientific | 2024 |
| Owens Garden Rooms Ltd | Construction | 2026 |
| Owen’S Contractors Fencing & Decking Ltd | Professional & scientific | 2025 |
| OWL Barn Fish Farm Ltd | Agriculture & fishing | 2020 |
| Oxshoph Ltd | Wholesale & retail | 2025 |
| Oyincrown Limited | Wholesale & retail | 2021 |
| P F I Mechanical Services Limited | Construction | 2002 |
| P Grant Assessments Limited | Health & social care | 2024 |
| P P Maintenance Ltd | Construction | 2006 |
| P S Oades (UK) Limited | Agriculture & fishing | 2008 |
| P Y Stores Ltd | Wholesale & retail | 2023 |
| P&M Precision Holdings Limited | Financial services | 2025 |
| P. a. Couriers Limited | Transport & logistics | 2020 |
| P. Griffiths Dairyman Limited | Wholesale & retail | 2007 |
| PA Compute Ltd | Information & communication | 2025 |
| Pablo & Pals Ltd | Other services | 2025 |
| Pacifika Security Limited | Administrative & support | 2025 |
| Paddlin Paws Limited | Arts & recreation | 2013 |
| Paduraru Trans Ltd | Transport & logistics | 2018 |
| Pagemark Solutions Ltd | Information & communication | 2016 |
| Pagra Ltd | Hospitality | 2024 |
| Pajel Ltd | Administrative & support | 2024 |
| Panino Pizzeria Limited | Hospitality | 2018 |
| Paraba Solutions Ltd | Information & communication | 2023 |
| Park Grange Farm Accommodation Limited | Hospitality | 2022 |
| Park ROW Properties ( Property Solutions) Limited | Real estate | 2021 |
| Passenger Travel Services Ltd | Transport & logistics | 2025 |
| Pastport Limited | Information & communication | 2025 |
| Patel OFF Licence Ltd | Wholesale & retail | 2022 |
| Pathfinder Training & Consultancy Limited | Education | 2011 |
| Patryk Wloch Ltd | Transport & logistics | 2019 |
| Paul Walker ECI Limited | Construction | 2017 |
| Paul Zemlik Transport Limited | Transport & logistics | 2014 |
| Pav&Son Distribution Ltd | Transport & logistics | 2025 |
| PC Services (UK) Limited | Other services | 2011 |
| PDA Yorkshire Ltd | Education | 2024 |
| PDB Controls Limited | Manufacturing | 1998 |
| Peachy Properties Ltd | Real estate | 2025 |
| Peaksolutions(Bhpl) Ltd | Information & communication | 2020 |
| Pearl Dragon Chinese Takeaway Limited | Hospitality | 2025 |
| Pearl Dragon Pontefract Ltd | Hospitality | 2023 |
| Pearl Dragon Takeaway Limited | Hospitality | 2018 |
| Pegasus Fire Protection (Yorkshire) Limited | Manufacturing | 2010 |
| Pendulum Sourcing Solutions Limited | Manufacturing | 2006 |
| Peniel Trading Limited | Wholesale & retail | 2020 |
| Pennine Group (Tractor and Engine) Ltd | Other services | 2015 |
| Pepper Engineering Partners Limited | Manufacturing | 2002 |
| Pepps Logistics Ltd | Transport & logistics | 2017 |
| Perfect Kitchen 888 Ltd | Hospitality | 2022 |
| Pest Control Depot Limited | Extraterritorial | 2010 |
| Petal Properties Ltd | Real estate | 2025 |
| Peter's Close Management Company (Upton) Limited | Households | 2008 |
| Petrock Ltd | Professional & scientific | 2019 |
| Pfsg Ltd | Education | 2023 |
| PG Coaching Limited | Education | 2020 |
| Phatdadde Ltd | Wholesale & retail | 2020 |
| Philip and Robert Howard Property Management Ltd | Real estate | 2019 |
| Phillip Earnshaw Limited | Health & social care | 2010 |
| Phoenix Health Solutions Limited | Health & social care | 2009 |
| Phoenix Walker Properties Ltd | Real estate | 2020 |
| Physio Consult Hub Ltd | Health & social care | 2025 |
| Pickerings of Pontefract Limited | Wholesale & retail | 2014 |
| Picson Printing & Embroidery Ltd | Manufacturing | 2024 |
| Pinetree Renovations Ltd | Construction | 2020 |
| Pinkerton Property Limited | Construction | 2025 |
| Pinnacle Elevation Ltd | Other services | 2015 |
| Pip's Pads Limited | Real estate | 2025 |
| Piri Shipping Ltd | Transport & logistics | 2025 |
| Pixis Interiors Limited | Professional & scientific | 2015 |
| Pizaspot Ltd | Hospitality | 2023 |
| PJ Fabrications and Composite Supplies Ltd | Manufacturing | 2021 |
| PJ Shipping Export Ltd | Transport & logistics | 2025 |
| PJW Telecoms Consultancy Ltd | Information & communication | 2015 |
| PK Yorkshire Limited | Professional & scientific | 2015 |
| Plant and Platforms Hire Ltd | Administrative & support | 2025 |