| Next GEN Engineering Academy C.I.C. | Education | 2026 |
| Nexus Rail Ltd | Professional & scientific | 2016 |
| NH Sports Network Limited | Education | 2022 |
| Niche Education & Training Ltd | Other services | 2019 |
| Nickerson Creative Limited | Information & communication | 2014 |
| NJR Building & Development Ltd | Real estate | 2025 |
| NMK Oral Care Limited | Health & social care | 2026 |
| NO Fuss Pots Ltd | Agriculture & fishing | 2025 |
| Noah's-Paper-Boat Ltd | Extraterritorial | 2025 |
| Nobleman Limited | Professional & scientific | 2014 |
| Nobs and Nockers Limited | Wholesale & retail | 2019 |
| Norah Cafe Shop Ltd | Hospitality | 2023 |
| North Bar Films Limited | Information & communication | 2022 |
| North Bar Solutions Ltd | Financial services | 2025 |
| North Rise Events Limited | Professional & scientific | 2023 |
| Northen Builders Limited | Administrative & support | 2017 |
| Northen Properties Limited | Real estate | 2020 |
| Northern Property and Management Services Limited | Real estate | 2003 |
| Northern Retrofit Building Services Limited | Construction | 2024 |
| Northern Retrofit Limited | Administrative & support | 2021 |
| Northern Wedding Films Ltd | Professional & scientific | 2026 |
| Northmen Group Limited | Wholesale & retail | 2021 |
| Northmoor MOT Limited | Wholesale & retail | 2019 |
| NU: YU Nails & Beauty Limited | Other services | 2012 |
| Nursery Rhymes (Yorkshire) Limited | Education | 2013 |
| Nurture Nooks Lettings Ltd | Real estate | 2024 |
| O'Connor & Co (Cottingham) Ltd | Hospitality | 2021 |
| OB1 Commercial Limited | Professional & scientific | 2025 |
| Occhipinti Trading Limited | Wholesale & retail | 2026 |
| Octagon Property Services Group Ltd | Professional & scientific | 2021 |
| Octavius Insights Limited | Health & social care | 2024 |
| OJ SPV Ltd | Real estate | 2017 |
| Ojas Corporation Ltd | Real estate | 2018 |
| Olive & IVY Medical Aesthetics Ltd | Health & social care | 2026 |
| Oliver Conrad Limited | Real estate | 2013 |
| Omerta Publishing Ltd | Information & communication | 2016 |
| Omonix Limited | Information & communication | 2018 |
| Onlexo Ltd | Professional & scientific | 2018 |
| Online Drawing UK Limited | Professional & scientific | 2019 |
| Ontyme Shipping Ltd | Transport & logistics | 2013 |
| OPB Sports Therapy Ltd. | Other services | 2020 |
| Open Activity Based Learning Limited | Health & social care | 2024 |
| Open Care Consulting Ltd | Health & social care | 2023 |
| Openers Limited | Professional & scientific | 2014 |
| OPG Property Ltd | Real estate | 2025 |
| Optima Clinics Ltd | Wholesale & retail | 2022 |
| Orbright Ltd | Wholesale & retail | 2022 |
| OS Safety UK Ltd | Professional & scientific | 2026 |
| Oshi Trading Limited | Wholesale & retail | 2023 |
| OUR Learning Cloud Limited | Education | 2010 |
| OUT of School Skillz Limited | Education | 2020 |
| P G Electrical Services Ltd | Construction | 2017 |
| P J Moore Services Ltd | Professional & scientific | 2021 |
| P.A.C PUB Co Limited | Hospitality | 2019 |
| P2 Property Ltd | Real estate | 2024 |
| P3 People Solutions Ltd | Administrative & support | 2022 |
| Package Ltd | Wholesale & retail | 2024 |
| PAD Construction Ltd | Construction | 2009 |
| Paley and Donkin Limited | Real estate | 1904 |
| Palmleaf Architects Ltd | Extraterritorial | 2024 |
| PAN India Lifestyles UK Limited | Hospitality | 2017 |
| Panzid Properties Limited | Real estate | 2025 |
| Panzima Limited | Professional & scientific | 2021 |
| Park Crescent Holiday Lets Limited | Real estate | 2022 |
| Park Lane Healthcare Limited | Professional & scientific | 2005 |
| Park Lane Healthcare Management Limited | Financial services | 2025 |
| Parkway Barber Limited | Other services | 2025 |
| Paronella Diligent Ltd | Real estate | 2024 |
| Party Octopus Ltd | Professional & scientific | 2024 |
| Pathways Training and Mentoring CIC | Administrative & support | 2020 |
| PD Thomas Limited | Public administration | 2014 |
| PDT Housing Ltd | Real estate | 2018 |
| Peaconh Limited | Education | 2023 |
| Peanut Construction Services Limited | Construction | 2026 |
| Pearl's Place Ltd | Hospitality | 2013 |
| Penrose Commercial Limited | Professional & scientific | 2021 |
| Penrose Consulting Limited | Other services | 2011 |
| Penthouse Beauty Ltd | Other services | 2024 |
| Pentile Construction Ltd | Construction | 2017 |
| Perfect TEN Nails, Health & Beauty Ltd | Other services | 2016 |
| Perfect TEN Podiatry & Sports Injuries Ltd | Health & social care | 2016 |
| Perfix Limited | Information & communication | 2026 |
| Peter Knight & SON (Decorators) Limited | Construction | 2005 |
| Peter Rawson (Holdings) Limited | Professional & scientific | 1979 |
| Pewter Group Ltd | Real estate | 2021 |
| Pfhtreffot Marine Ltd | Professional & scientific | 2025 |
| PGR Freetown Limited | Real estate | 2021 |
| Pharmisure Limited | Professional & scientific | 2025 |
| Photograph My Product Limited | Professional & scientific | 2018 |
| Pink Custard Design Limited | Manufacturing | 2006 |
| Piper Sands Ltd | Hospitality | 2023 |
| Pjdm Ltd | Health & social care | 2024 |
| PJM & Co. Properties Ltd | Real estate | 2011 |
| PL3X Property Ltd | Real estate | 2022 |
| Platlove Leisure Limited | Hospitality | 2025 |
| Play Makes Sense Ltd | Wholesale & retail | 2020 |
| PLH 2026 Limited | Extraterritorial | 2026 |
| PLH 2086 Limited | Financial services | 2026 |
| PLH Bradford Hall Limited | Health & social care | 2026 |
| PLH Crosslee Manor Limited | Health & social care | 2026 |