| Napc Hollyclose Management Company Ltd | Households | 2022 |
| Narrative Flow Limited | Arts & recreation | 2007 |
| Nasya Health Limited | Health & social care | 2022 |
| Natural Reflections Counselling Ltd | Health & social care | 2025 |
| Nbnailz Ltd | Other services | 2024 |
| Ndfy Limited | Administrative & support | 2022 |
| Neil Beaty Chimney Sweep Limited | Administrative & support | 2022 |
| Neil Wordsworth Home Improvements Limited | Construction | 2014 |
| New House Farm (Lorton) Limited | Hospitality | 2011 |
| Nicearea Limited | Professional & scientific | 2015 |
| Nick Barber Auctions Limited | Wholesale & retail | 2020 |
| NKA Pharm Limited | Other services | 2024 |
| NO EGO Challenge Limited | Administrative & support | 2012 |
| North Lakes Engineering Ltd | Professional & scientific | 2025 |
| North Lakes Rainwater and Drainage Ltd | Construction | 2025 |
| North West Domestic Construction Limited | Construction | 2026 |
| Norton Property Projects Ltd | Administrative & support | 2013 |
| Norwood Guest House Limited | Hospitality | 2012 |
| NRW Welding Engineering Services Ltd | Professional & scientific | 2021 |
| Nu-Tech Associates Limited | Administrative & support | 2001 |
| Nuclear Controls Limited | Professional & scientific | 2023 |
| Nuclear PMC Ltd | Professional & scientific | 2022 |
| Nuclear Radiographic Consultants Ltd | Professional & scientific | 2011 |
| Nuova Distribution UK Limited | Wholesale & retail | 2017 |
| Nutkin Hotels Ltd | Hospitality | 2013 |
| NUÉ Hair Limited | Other services | 2026 |
| NW PM Limited | Administrative & support | 2019 |
| O'Halloran Restaurant Limited | Hospitality | 2019 |
| Oakhurst Garden Centre Limited | Other services | 2003 |
| Oaklands MD Limited | Health & social care | 2018 |
| Oaktree Accountancy (Cockermouth) Limited | Professional & scientific | 2010 |
| OG Inspection Services Ltd | Professional & scientific | 2026 |
| Oglanby Electrical Services Limited | Construction | 2024 |
| Ollievander's Limited | Wholesale & retail | 2023 |
| Osprey Cheerleading Academy CIC | Arts & recreation | 2024 |
| Osprey Cumbria Limited | Manufacturing | 2015 |
| Osprey Systems Engineering Limited | Professional & scientific | 2022 |
| Ouse Bridge House Holiday Apartments Ltd | Hospitality | 2021 |
| OX Wind and Transport Ltd | Transport & logistics | 2022 |
| P & B Holidays Limited | Hospitality | 2022 |
| P & J Lister Limited | Wholesale & retail | 2003 |
| P & R Developments Limited | Real estate | 2025 |
| P & R Roofing Cumbria Ltd | Construction | 2014 |
| P Coyle & SON Ltd | Construction | 2013 |
| P D Engineering (Cumbria) Limited | Professional & scientific | 2010 |
| P&P Impact Solutions Ltd | Other services | 2023 |
| P4 Solutions Limited | Administrative & support | 2017 |
| Pacific Supplies UK Limited | Wholesale & retail | 2002 |
| Paintbrush Mercenaries Ltd | Construction | 2026 |
| Panda Mountain Consulting Limited | Real estate | 2022 |
| Panino Italiano Limited | Hospitality | 2019 |
| Park PAY Stay Ltd | Other services | 2025 |
| Parkhouse Property Developments Ltd | Construction | 2026 |
| Parkland Motor Company Ltd | Wholesale & retail | 2023 |
| Pass With Justine Ltd | Education | 2026 |
| Paul Bennett Joinery & DRY Lining Services Limited | Construction | 2004 |
| Paul Dixon Limited | Construction | 2002 |
| Paul Foster Advisory Limited | Administrative & support | 2022 |
| Paul Pointon Consulting Limited | Professional & scientific | 2025 |
| PAW PAT Roll Ltd | Other services | 2022 |
| PCG Engineering Limited | Professional & scientific | 2022 |
| Pdst Limited | Education | 2015 |
| Penrith Pubs Ltd | Real estate | 2020 |
| Percy House Gallery Limited | Arts & recreation | 2012 |
| Perensis Ltd | Wholesale & retail | 2021 |
| Performance Preparation Limited | Wholesale & retail | 2016 |
| Phase: Welding Consultancy Ltd | Professional & scientific | 2023 |
| Phil Bradley Ltd | Arts & recreation | 2006 |
| Pinnacle Project Management Services Limited | Professional & scientific | 2026 |
| Pinworx Limited | Extraterritorial | 2026 |
| Pinworx Technologies Limited | Extraterritorial | 2026 |
| Pitcairn Close Residents Management Company Limited | Households | 2022 |
| PJS Media Limited | Real estate | 2017 |
| Place Innovation Limited | Administrative & support | 2019 |
| Planet Knox Limited | Manufacturing | 1997 |
| Podgy Paws Limited | Wholesale & retail | 2007 |
| Pointjoin Property Management Limited | Households | 1990 |
| Pollock's Paper Theatres Ltd | Arts & recreation | 2022 |
| Polo Business Management Limited | Real estate | 1995 |
| Portarius Group Ltd | Construction | 2025 |
| Posselectrical Ltd | Construction | 2010 |
| Prepped Potatoes Ltd | Hospitality | 2026 |
| Price Walker Limited | Wholesale & retail | 2010 |
| Prima UNO Limited | Other services | 2009 |
| Primary Reactive Limited | Construction | 2012 |
| PRM Business Transitions Ltd | Professional & scientific | 2019 |
| Property by Docherty Limited | Real estate | 2022 |
| Property Development Enterprise Limited | Real estate | 2018 |
| Property of the Lakes Ltd | Real estate | 2023 |
| Prospect Commissioning Limited | Administrative & support | 2012 |
| Prosure Engineering Ltd | Professional & scientific | 2015 |
| Prufrock Coffee Limited | Hospitality | 2010 |
| PTS West Coast Limited | Professional & scientific | 2017 |
| Punchthesky Limited | Hospitality | 2017 |
| PW CAD Design Limited | Professional & scientific | 2018 |
| Q67A Limited | Professional & scientific | 2024 |
| QI Essence Ltd | Health & social care | 2014 |
| Quantum Power West Lakes Limited | Administrative & support | 2025 |
| Quest Ventures Limited | Real estate | 2004 |
| Quills of Cumbria Limited | Professional & scientific | 2016 |