| NJ Domestics Ltd | Other services | 2021 |
| NJK Electrics Ltd. | Construction | 2016 |
| Nkolekapya's Place Ltd | Health & social care | 2022 |
| NML Consult Ltd | Professional & scientific | 2025 |
| NMM Nuclear Consultant Limited | Professional & scientific | 2014 |
| NNZ Ltd | Administrative & support | 1984 |
| NO Context Ltd | Professional & scientific | 2022 |
| NO Mans Land Wild Camping Ltd | Wholesale & retail | 2025 |
| NO.1TELECOM Limited | Construction | 2019 |
| Nominal Property Ltd | Real estate | 2025 |
| Norlock Consulting Limited | Other services | 2017 |
| North West Cables Limited | Manufacturing | 1984 |
| North West Custom Carpentry Ltd | Construction | 2020 |
| North West Window Repairs Ltd | Manufacturing | 2016 |
| Northern Creations Ltd | Manufacturing | 2025 |
| NP Energy Services Ltd | Professional & scientific | 2022 |
| Npkt Holdings Limited | Financial services | 2007 |
| NS Commercial Repairs Ltd | Wholesale & retail | 2021 |
| NSC Catering Limited | Hospitality | 2015 |
| NSC Contracts Limited | Construction | 2015 |
| NSC Energies Limited | Education | 2015 |
| NSC Leisure Limited | Hospitality | 2015 |
| Nsiala Properties Limited | Real estate | 2019 |
| NT Social Work Limited | Health & social care | 2024 |
| Nutgrove Carpets Ltd | Wholesale & retail | 2002 |
| NV Haircare Ltd | Other services | 2021 |
| Nwpi Limited | Real estate | 2020 |
| NYE Electrical Installation Services Limited | Construction | 2026 |
| Ocean Safety Services (OSS) Ltd | Professional & scientific | 2023 |
| OEG Subsea Limited | Administrative & support | 2017 |
| OH SO Content Ltd | Professional & scientific | 2023 |
| OHM Radiology Consulting Limited | Health & social care | 2018 |
| Okane Project Consultants UK Ltd | Professional & scientific | 2025 |
| Old Willow Medical Limited | Health & social care | 2023 |
| Olive Properties Limited | Real estate | 1999 |
| Olivers Heating & GAS Ltd | Construction | 2026 |
| Omega Care Group Ltd | Administrative & support | 2015 |
| Omega Construction Group Ltd | Construction | 2023 |
| Omega Life Clinical Ltd | Health & social care | 2025 |
| Omega Life Education Ltd | Education | 2023 |
| Omega Life Group Holdings Ltd | Financial services | 2024 |
| Omega Life Training Ltd | Education | 2025 |
| Omega Life Transport Ltd | Transport & logistics | 2024 |
| Omis Collective Ltd | Manufacturing | 2025 |
| Omnicom Systems (UK) Limited | Manufacturing | 1997 |
| ON the Ball Contracting Ltd | Construction | 2025 |
| Onlabs Limited | Information & communication | 2006 |
| Only Choice Estates Ltd | Real estate | 2022 |
| Onqor Group Investments Holdings Ltd | Information & communication | 2024 |
| Onthemove Personal Property Consultant Limited | Real estate | 2019 |
| Onyax Ltd | Wholesale & retail | 2025 |
| OPA Maintenance Ltd | Construction | 2022 |
| OPA North West Limited | Construction | 2022 |
| Opal Cleaning Company Limited | Administrative & support | 2025 |
| Open Vendz Ltd | Wholesale & retail | 2023 |
| Opes NW Ltd | Administrative & support | 2024 |
| Optimism GPB Ltd | Construction | 2021 |
| Optimum Applications Ltd | Information & communication | 2010 |
| Orah Care Ltd | Health & social care | 2025 |
| Orange Central Ltd | Extraterritorial | 2012 |
| Orangeries of Cheshire Limited | Construction | 2011 |
| Orchard Fire and Security Limited | Manufacturing | 1986 |
| OUT54 Ltd | Real estate | 2019 |
| Outlook Energy Solutions Ltd | Administrative & support | 2018 |
| Overbrook Court Management Company Limited | Administrative & support | 2001 |
| P & B Developments Limited | Construction | 2015 |
| P&V Consultancy Limited | Professional & scientific | 2018 |
| P.S.M. Travel Limited | Transport & logistics | 2014 |
| P.Swift ENG Limited | Information & communication | 2007 |
| Palawan Aviation Ltd | Professional & scientific | 2024 |
| Palo Cortado Ltd | Real estate | 2024 |
| Papas Pizzeria Ltd | Hospitality | 2026 |
| Paragonpro Flooring UK Limited | Construction | 2024 |
| Parametric POS Ltd | Professional & scientific | 2023 |
| Paramount Kitchens Ltd | Construction | 2020 |
| Parkers Packaging Limited | Manufacturing | 2004 |
| Paul Leggett Funfairs Ltd | Arts & recreation | 2017 |
| PAY Later Carpets Franchise Ltd | Administrative & support | 2021 |
| PAY Later Carpets Ltd | Wholesale & retail | 2018 |
| PAY Later Flooring Ltd | Wholesale & retail | 2019 |
| PC Electrical Solutions Ltd | Construction | 2022 |
| PCL Holdings (NW) Ltd | Real estate | 2024 |
| PCL Windows & Plastics Ltd | Administrative & support | 2019 |
| PDH Insulations Ltd | Construction | 2021 |
| PDK Financial Solutions Ltd | Professional & scientific | 2021 |
| Pearl IT Solutions Limited | Information & communication | 2018 |
| Pearl Vapes Ltd | Manufacturing | 2023 |
| Pedalcity Limited | Wholesale & retail | 2024 |
| Pencil Trick Productions CIC | Information & communication | 2012 |
| Peng Northwest Limited | Construction | 2011 |
| Performance Mind Limited | Arts & recreation | 2016 |
| Pergo Bar Ltd | Hospitality | 2024 |
| Pestoclear Warrington Limited | Administrative & support | 2011 |
| Peter Gilding & Co. Limited | Wholesale & retail | 1986 |
| Peter Gilding Fruit Packers Limited | Administrative & support | 2018 |
| Peter Woods & Associates Limited | Construction | 2013 |
| Petits PAS Community Interest Company | Other services | 2025 |
| PFS26 Commercial Limited | Administrative & support | 2026 |
| Phalaris Group Limited | Financial services | 2026 |
| Phalaris Ventures | Financial services | 2026 |