| Northwood Caravan and Holiday Park Limited | Hospitality | 2011 |
| Northwood Commercials Limited | Wholesale & retail | 2007 |
| Nortons Hiab & Crane Hire Limited | Transport & logistics | 2006 |
| Nortons Hiab Hire Limited | Transport & logistics | 2006 |
| Nova Rental Limited | Administrative & support | 2025 |
| Novel Aesthetics Ltd | Other services | 2022 |
| NPA Roofing Specialists Ltd | Construction | 2023 |
| NRG Transporters Ltd | Transport & logistics | 2023 |
| Nrth Digital Limited | Information & communication | 2014 |
| NUM8ER Plates Ltd | Wholesale & retail | 2025 |
| Number 1 Bathrooms Limited | Construction | 2024 |
| Nurture Nest North West Ltd | Health & social care | 2025 |
| Nurturing Through Nature Ltd | Education | 2023 |
| Nuts Official Ltd | Hospitality | 2025 |
| NW Development Solutions Ltd | Real estate | 2025 |
| NW Transport Solutions Ltd | Manufacturing | 2024 |
| Nwsb Autos Ltd | Wholesale & retail | 2026 |
| Nwsb Management Ltd | Professional & scientific | 2026 |
| O & N Hospitality Ltd | Hospitality | 2025 |
| Oaken Heights Burnley Limited | Households | 2025 |
| Oaklea Care Limited | Health & social care | 2000 |
| Oakleigh Speech Clinic Limited | Other services | 2016 |
| Oakley Services + Ltd | Administrative & support | 2023 |
| Oakwood Engineering Services Limited | Professional & scientific | 2024 |
| Ocean Blinds Ltd | Wholesale & retail | 2015 |
| Ohear Investments Ltd | Financial services | 2025 |
| OHM Smart Ltd | Construction | 2019 |
| OIL Shop Ltd | Wholesale & retail | 2018 |
| Olivia Prior Animal Physiotherapy Ltd | Professional & scientific | 2025 |
| Oliviasbowboutique Ltd | Wholesale & retail | 2025 |
| Olympus (NW) Limited | Wholesale & retail | 2022 |
| Omega Freight Limited | Transport & logistics | 2024 |
| Omgzaracakes Limited | Manufacturing | 2026 |
| Omnibuild Solutions Ltd | Construction | 2025 |
| ON Point Support & Solutions Limited | Professional & scientific | 2017 |
| Online Workwear Limited | Wholesale & retail | 2017 |
| Only Eco Retrofit Ltd | Construction | 2024 |
| Ontraccs Limited | Other services | 2015 |
| Onyx 8 Properties Ltd | Real estate | 2022 |
| Open Financial Services Ltd | Financial services | 2022 |
| Open Financial Solutions Ltd | Financial services | 2017 |
| Open House Markets Ltd | Financial services | 2026 |
| Optical Direct (Clayton-Le-Moors) Limited | Wholesale & retail | 1994 |
| Optimum Edge Group Ltd | Wholesale & retail | 2026 |
| Orbixa Technologies Ltd | Information & communication | 2025 |
| ORC Drinks Ltd | Hospitality | 2025 |
| Orchard Electrical Solutions Ltd | Construction | 2023 |
| Orchid House Healthcare Ltd | Health & social care | 2026 |
| Origin International Limited | Information & communication | 2018 |
| Orion Lowe Ltd | Other services | 2024 |
| Ormwood Homes Limited | Construction | 1982 |
| Ossy Mini Market Ltd | Wholesale & retail | 2025 |
| Ossy Minimarket 1 Limited | Wholesale & retail | 2025 |
| OST Supplies Limited | Construction | 2025 |
| Osuri Limited | Professional & scientific | 2025 |
| Oswaldtwistle Glass Limited | Construction | 2002 |
| Oswaldtwistle Mini Market Ltd | Wholesale & retail | 2024 |
| Oswaldtwistle Social Club CIC | Arts & recreation | 2019 |
| Otto James Consulting Limited | Administrative & support | 2019 |
| OUT the Box Limited | Arts & recreation | 2017 |
| Outreach Reachout Ltd | Education | 2022 |
| Ovrin Ltd | Wholesale & retail | 2025 |
| Owen & Ewing Holdings Ltd | Financial services | 2011 |
| Owen & Ewing Insurance Brokers Ltd | Financial services | 2011 |
| P & C UK Limited | Real estate | 2008 |
| P Hartley Plumbing & GAS Services Ltd | Construction | 2024 |
| P&S Asbestos Services Ltd | Construction | 2024 |
| P.A.N.D.A C.I.C. | Health & social care | 2022 |
| P1ZZA Station Limited | Hospitality | 2023 |
| Pach Bhai Ross Ltd | Hospitality | 2026 |
| Packaging Services Group Ltd | Financial services | 2016 |
| PAE Civils Limited | Construction | 2025 |
| PAK Watan Cash and Carry Ltd | Wholesale & retail | 2023 |
| Pakistan on a Plate Ltd | Hospitality | 2024 |
| Paladin Nsas | Information & communication | 2015 |
| Paluka Promotions Ltd | Arts & recreation | 2021 |
| Paplu Indian Cuisine Ltd | Hospitality | 2025 |
| Paratha Ltd | Hospitality | 2025 |
| Park House Dental Limited | Health & social care | 2020 |
| Park Road Launderette Ltd | Other services | 2017 |
| Parker FOX Holdings Ltd | Wholesale & retail | 2019 |
| Parker's Panel Products Limited | Manufacturing | 2018 |
| Parkins Construction Limited | Construction | 2024 |
| Parkins Contracting Ltd | Administrative & support | 2011 |
| Parkside Professionals Ltd | Real estate | 2024 |
| Parmos Accy Ltd | Hospitality | 2025 |
| Pasg Services Ltd | Hospitality | 2025 |
| Pathways Associates Community Interest Company | Health & social care | 2008 |
| Pattersons-Estates Ltd | Real estate | 2024 |
| Paul Brandwood Limited | Wholesale & retail | 2005 |
| Paul Hacking Limited | Construction | 2014 |
| Pawterra Pets Ltd | Wholesale & retail | 2026 |
| Payment Industries Limited | Professional & scientific | 2015 |
| PBC Brewery Solutions Ltd | Manufacturing | 2020 |
| PC 2 Cellular Ltd | Wholesale & retail | 2016 |
| Pearce Upholstery Limited | Wholesale & retail | 2018 |
| Pebble Trade Ltd | Wholesale & retail | 2026 |
| Pegasus Plumbing & GAS Ltd | Construction | 2017 |
| Pegasus Properties NW Ltd | Real estate | 2019 |
| Pendle Carpets Limited | Wholesale & retail | 2011 |