| Projecon Ltd | Other services | 2019 |
| Project 53 Ltd | Manufacturing | 2010 |
| Project Abler Ltd | Professional & scientific | 2014 |
| Project Automotive Consultancy and Assessment Limited | Professional & scientific | 2020 |
| Project Berbyn Ltd | Real estate | 2023 |
| Project Burrito Leeds Ltd | Hospitality | 2025 |
| Project Cafe Ltd | Hospitality | 2026 |
| Project Cake Bidco Limited | Financial services | 2021 |
| Project Cake Midco Limited | Financial services | 2021 |
| Project Cake Topco Limited | Financial services | 2021 |
| Project Customs Ltd | Wholesale & retail | 2023 |
| Project Exit Limited | Information & communication | 2026 |
| Project Forward Technologies Ltd | Information & communication | 2025 |
| Project Fracha Limited | Wholesale & retail | 2025 |
| Project Georgia Bidco Limited | Administrative & support | 2018 |
| Project Georgia Topco Limited | Financial services | 2018 |
| Project H Property Solutions Ltd | Households | 2020 |
| Project HM Ltd | Wholesale & retail | 2023 |
| Project Home Improvements Limited | Construction | 2017 |
| Project House Trading Ltd | Hospitality | 2023 |
| Project Lift OFF C.I.C. | Arts & recreation | 2025 |
| Project Opes Limited | Wholesale & retail | 2023 |
| Project Orion Bidco Limited | Financial services | 2024 |
| Project Orion Midco Limited | Financial services | 2024 |
| Project Orion Noteco Limited | Financial services | 2024 |
| Project Orion Topco Limited | Financial services | 2024 |
| Project Pacify Ltd | Hospitality | 2025 |
| Project Polygon Ltd. | Professional & scientific | 2021 |
| Project Scaffolding (York) Limited | Construction | 2017 |
| Project SIX Studios Limited | Information & communication | 2001 |
| Project Space Leeds | Arts & recreation | 2010 |
| Project Support Services UK Ltd | Information & communication | 2025 |
| Project SWG | Information & communication | 2012 |
| Project Vision (North) Limited | Administrative & support | 2018 |
| Project: Blueprint Human Engineering CIC | Manufacturing | 2019 |
| Projectaserve Ltd | Administrative & support | 2024 |
| Projectification Ltd | Professional & scientific | 2018 |
| Projectmax Limited | Construction | 2026 |
| Projects & Programmes Professionals Limited | Wholesale & retail | 2025 |
| Projects 90 Limited | Construction | 2015 |
| PROJECTS247 Ltd | Information & communication | 2019 |
| Projentum Ltd | Professional & scientific | 2010 |
| Projetti Ltd | Information & communication | 2018 |
| Projility (Yorkshire) Limited | Professional & scientific | 2021 |
| Projiq Limited | Information & communication | 2022 |
| Projjexx Ltd | Professional & scientific | 2023 |
| Projworx Ltd | Information & communication | 2024 |
| Proken Limited | Financial services | 2012 |
| Prolina Limited | Real estate | 2023 |
| Prolux Limited | Manufacturing | 1985 |
| Proma Consultancy Limited | Professional & scientific | 2026 |
| Promako Services Ltd | Professional & scientific | 2018 |
| Promatica Digital Ltd | Information & communication | 2019 |
| Promax Roofing Ltd | Construction | 2025 |
| Prombase Limited | Health & social care | 2022 |
| Promed Professional Ltd | Health & social care | 2013 |
| Promedical Consulting Limited | Health & social care | 2005 |
| Prometheus Enterprises U.K. Limited | Information & communication | 2011 |
| Prominent Fashion House Ltd | Manufacturing | 2024 |
| Promo Parrot Ltd | Professional & scientific | 2014 |
| Promontoria Limited | Information & communication | 1999 |
| Prompt Deliveries Limited | Transport & logistics | 2025 |
| Prompt Delivery Services Ltd | Transport & logistics | 2018 |
| Promptus.Ai Limited | Information & communication | 2023 |
| Prop - MED Solutions Limited | Health & social care | 2015 |
| Propa Software Ltd | Information & communication | 2019 |
| Propack Payroll Services Limited | Professional & scientific | 2017 |
| Propaganda Group Limited | Extraterritorial | 2006 |
| Propaganda Media Limited | Extraterritorial | 2006 |
| Propaganda PR Limited | Extraterritorial | 2006 |
| Propak (Heckmondwike) Limited | Transport & logistics | 2000 |
| Proparis Ltd | Construction | 2024 |
| Propax Investments UK Limited | Households | 2025 |
| Propelify Limited | Professional & scientific | 2020 |
| Propelix Limited | Real estate | 2023 |
| Propeller Architecture Ltd | Construction | 2017 |
| Proper Bike Shop Ltd | Wholesale & retail | 2024 |
| Proper JOB Consultants Limited | Professional & scientific | 2021 |
| Proper Property Services Ltd | Administrative & support | 2024 |
| Properlety Ltd | Real estate | 2021 |
| Properli Ltd | Real estate | 2020 |
| Propertee Managements Ltd | Real estate | 2023 |
| Properties by DW (Leeds) Ltd | Real estate | 2025 |
| Properties by HD Limited | Real estate | 2025 |
| Properties by J.E.N Limited | Real estate | 2023 |
| Properties by MKS Ltd | Real estate | 2023 |
| Properties by Stead and Hanley Limited | Real estate | 2024 |
| Properties Realty Limited | Real estate | 2026 |
| Properties to BE Seen Ltd | Real estate | 2025 |
| Properties UK Group Ltd | Real estate | 2023 |
| PROPERTIES4PETS Ltd | Real estate | 2019 |
| Property & Plan Ltd | Real estate | 2023 |
| Property 1 Consultant Ltd | Financial services | 2019 |
| Property 101 Limited | Real estate | 2021 |
| Property 4 Limited | Real estate | 2017 |
| Property Acquisitions and Disposals Ltd | Real estate | 2025 |
| Property Appraisals Ltd | Real estate | 2023 |
| Property Bank Limited | Professional & scientific | 2007 |
| Property Beeston Ltd | Real estate | 2022 |
| Property by Capital Limited | Real estate | 2021 |