| Nahri Ltd | Financial services | 2025 |
| Nails & Beauty by Claire Harrison Limited | Other services | 2025 |
| Nally Mini Market Ltd | Wholesale & retail | 2022 |
| Namh Moon Ltd | Hospitality | 2023 |
| Nandar Limited | Real estate | 2021 |
| Nanduni Properties Ltd | Real estate | 2024 |
| Nanoform U.K. Ltd | Professional & scientific | 2023 |
| Naomi House Photography Limited | Professional & scientific | 2010 |
| Narh Ltd | Health & social care | 2024 |
| Nasza Biedronka (Botchergate) Ltd | Wholesale & retail | 2015 |
| National Parks Partnerships LLP | | 2016 |
| National Taxi Association | Other services | 1997 |
| Nationwide Telecom Limited | Information & communication | 2015 |
| Native British Lamb 365 Limited | Agriculture & fishing | 2025 |
| Natural Choices ENT. Limited | Construction | 2012 |
| Natural Unisex Salon Limited | Other services | 2024 |
| Naturel Therapies Limited | Other services | 2015 |
| Natures Edge Landscaping Ltd | Administrative & support | 2025 |
| Naviam Acquisition Corp Ltd | Information & communication | 2021 |
| Naviam Global Limited | Information & communication | 2013 |
| Naviam Investments Limited | Financial services | 2022 |
| Naviam Technologies Limited | Information & communication | 1994 |
| Nbst Ltd | Transport & logistics | 2023 |
| ND 2025 Ltd | Financial services | 2025 |
| ND Plumbing & Heating Limited | Construction | 2011 |
| ND Plumbing and Heating (Carlisle) Limited | Construction | 2025 |
| Needle Sports (Keswick) Ltd | Wholesale & retail | 2010 |
| Neil Rudd Auto Repairs Limited | Wholesale & retail | 2013 |
| Nelson Bridge Court Management Company Limited | Real estate | 1993 |
| Nelson Court (Carlisle) Management Company Limited | Real estate | 2007 |
| Nelson Evolution Limited | Wholesale & retail | 2023 |
| Nelson Worldwide Limited | Transport & logistics | 2026 |
| Neptune Asset Management (UK) Limited | Real estate | 2020 |
| Nest Cumbria Limited | Wholesale & retail | 2025 |
| Nestbox Homes Portfolio Ltd | Real estate | 2018 |
| NET Zero Marine Limited | Energy | 2023 |
| Netherby Estate Limited | Real estate | 2019 |
| Netherby Gravel Company Limited(The) | Professional & scientific | 1960 |
| Nethercroft (Management Company) Ltd | Households | 2005 |
| New East Trading Company Ltd | Wholesale & retail | 2017 |
| New Joyful House Ltd | Hospitality | 2016 |
| New Seasons Catering Limited | Hospitality | 2016 |
| New Starters Driving School Limited | Education | 2012 |
| New Technology Consultants Limited | Professional & scientific | 2009 |
| New Union Kendal Limited | Hospitality | 2017 |
| Newbiggin Farms | Agriculture & fishing | 2022 |
| Newlands Park (Dearham) Management Company Limited | Households | 2014 |
| Newman Electrical Services (Cumbria) Limited | Extraterritorial | 2017 |
| Newquay Property Limited | Real estate | 2019 |
| Newtown Community Learning Centre | Education | 2004 |
| Newtown Construction Limited | Construction | 2012 |
| Nexgenweb Limited | Information & communication | 2024 |
| Next Day Garage Ltd | Wholesale & retail | 2024 |
| Next Gear Vehicles Ltd | Wholesale & retail | 2025 |
| Next Level Developments Cumbria Ltd | Construction | 2025 |
| Nexum Growth Labs Ltd | Information & communication | 2026 |
| Nexus Electrical Systems Ltd | Construction | 2025 |
| Nf-Trans Ltd | Wholesale & retail | 2022 |
| NGB Invest Ltd | Financial services | 2021 |
| Nguyen & BUI Homes Ltd | Construction | 2025 |
| NH Mechanical Limited | Manufacturing | 2018 |
| Niak Homes Limited | Households | 2025 |
| Nichol Holdings Limited | Administrative & support | 2020 |
| Nichol Purdam & SON Limited | Real estate | 2007 |
| Nicholas Terrace Management Company Limited | Households | 2016 |
| Nicholas Way Management Company Limited | Households | 2026 |
| Nicholson & Coulthard Limited | Wholesale & retail | 1976 |
| Nicholson Ground Maintenance Limited | Professional & scientific | 2008 |
| Nicholson Logistics Limited | Transport & logistics | 2017 |
| Nick Brown (Carlisle) Limited | Agriculture & fishing | 2017 |
| Nicki B Ltd | Manufacturing | 1996 |
| Nicky Dixon & Sons Limited | Wholesale & retail | 1986 |
| Night OWL (Cumbria) Limited | Health & social care | 2024 |
| Nikki White Logistics Limited | Transport & logistics | 2017 |
| Nikli Barbers Ltd | Other services | 2025 |
| Niko's Laundry and Ironing Services Limited | Administrative & support | 2024 |
| Nine Bars Europe Ltd | Information & communication | 2016 |
| Nish Couriers Ltd | Transport & logistics | 2019 |
| Niven Estates Ltd | Real estate | 2026 |
| Nivisca Limited | Wholesale & retail | 2016 |
| Nixon Logistics Ltd | Transport & logistics | 2023 |
| Nixon Travel Ltd | Transport & logistics | 2025 |
| NJ Bathrooms Plumbing and Tiling Ltd | Construction | 2017 |
| NJ Brown Limited | Transport & logistics | 2025 |
| Nj's Cafe Limited | Hospitality | 2022 |
| NJS Managed Properties Ltd | Real estate | 2026 |
| NKF (Cumbria) Ltd | Real estate | 2025 |
| NM Syria Ltd | Hospitality | 2024 |
| NO 10 Restaurant Ltd | Hospitality | 2005 |
| NO JOB TOO Big TOO Small Limited | Administrative & support | 2026 |
| NO43COLLECTABLES Ltd | Wholesale & retail | 2020 |
| Nomad Services Limited | Real estate | 2016 |
| Norfolk Court (Carlisle) Limited | Households | 1989 |
| Norfolk Court (Carlisle) Management Company Limited | Households | 2001 |
| Norfolk Road Flats Limited | Households | 2025 |
| Norglen Property Management Limited | Real estate | 2024 |
| Norman Batty Ltd | Agriculture & fishing | 2023 |
| Norman Dunkeld Decorators Limited | Construction | 2018 |
| Norman Farming Company | Agriculture & fishing | 2011 |
| Norris Construction & Developments Ltd | Construction | 2024 |