| Nontoxicated Ltd | Information & communication | 2020 |
| Noodles Two Ltd | Hospitality | 2018 |
| Nook.Ery Ltd | Extraterritorial | 2022 |
| Nordic Ecohome LLP | | 2023 |
| Nordic Elements Limited | Construction | 2024 |
| Norfolk Waste Limited | Water & waste | 1994 |
| Norlous Ltd | Hospitality | 2024 |
| Norman Drury Limited | Manufacturing | 1963 |
| Norseman Gibb Ltd | Extraterritorial | 2015 |
| Norsi Properties Limited | Real estate | 2022 |
| Norsman Fleet Units Limited | Professional & scientific | 1975 |
| Nortech Foods Limited | Manufacturing | 1982 |
| North and South Recruitment Limited | Professional & scientific | 2019 |
| North Bridge Car Wash Ltd | Administrative & support | 2024 |
| North Force Limited | Other services | 2019 |
| North Lakeside Medical Limited | Health & social care | 2010 |
| North Lakeside Psychiatry Ltd | Health & social care | 2014 |
| North Lincs Contracting Ltd | Water & waste | 2021 |
| North Lincs Property Limited | Construction | 1998 |
| North Lincs Refinishing Ltd | Wholesale & retail | 2016 |
| North Lincs Sand & Gravel Ltd | Mining & quarrying | 2020 |
| North Lindsey College | Education | 2018 |
| North Marine Road Maintenance Company (Scarborough) Limited | Administrative & support | 1996 |
| North Notts Ploughing Match | Arts & recreation | 2024 |
| North Point Management Ltd | Real estate | 2020 |
| North Star Transport Ltd | Transport & logistics | 2023 |
| North Storage Ltd | Transport & logistics | 2018 |
| North West Plant Repairs Ltd | Construction | 2026 |
| Northbridge Advisory Group Ltd | Extraterritorial | 2026 |
| Northbridge Cargo Systems Ltd | Extraterritorial | 2025 |
| Northbridge Innovations Ltd | Extraterritorial | 2026 |
| Northbridge Trading Group Ltd | Extraterritorial | 2026 |
| Northcert Certification & Inspection & Training Limited | Professional & scientific | 2020 |
| Northcon Limited | Manufacturing | 2018 |
| Northcraft Limited | Extraterritorial | 2013 |
| Northcult Ltd | Arts & recreation | 2026 |
| Northern Biostrategies Ltd | Professional & scientific | 2026 |
| Northern Black Productions Limited | Information & communication | 2003 |
| Northern Blue Ltd | Wholesale & retail | 2022 |
| Northern Classics Limited | Wholesale & retail | 2019 |
| Northern Components Limited | Wholesale & retail | 1980 |
| Northern Developments (Yorkshire) Limited | Real estate | 2015 |
| Northern DRY Wall Systems Limited | Construction | 1997 |
| Northern Energy Services (Holdings) Ltd | Extraterritorial | 2014 |
| Northern Energy Services Limited | Manufacturing | 1993 |
| Northern Engineering Trading Company Ltd | Wholesale & retail | 2011 |
| Northern GAS & Plumbing Services Limited | Construction | 2009 |
| Northern GAS Assessment Services Limited | Education | 2006 |
| Northern Landscapes and Construction Ltd | Construction | 2025 |
| Northern Power Projects Ltd | Construction | 2021 |
| Northern Precision Limited | Manufacturing | 1996 |
| Northern Residential Property Investments Limited | Real estate | 2026 |
| Northern Rigging Services Ltd | Construction | 2014 |
| Northern Trading and Investments Ltd | Wholesale & retail | 2022 |
| Northern UK Recoveries Limited | Transport & logistics | 2011 |
| Northernist Limited | Wholesale & retail | 2017 |
| NORTHERNTECH360 Limited | Wholesale & retail | 2026 |
| Northferry Wealth Management Limited | Financial services | 2018 |
| Northfield Commercial Ltd | Wholesale & retail | 2025 |
| Northfield Fencing Ltd | Agriculture & fishing | 2022 |
| Northfield Plant Ltd | Administrative & support | 2022 |
| Northfield Rents Limited | Construction | 2018 |
| Northfield Training Village Ltd | Education | 2019 |
| Northforge Orbit Ltd | Extraterritorial | 2026 |
| Northforge Pixel Labs Ltd | Extraterritorial | 2026 |
| Northforge Ventures Ltd | Information & communication | 2025 |
| Northgate Accountancy Limited | Professional & scientific | 2015 |
| Northgate PRE School and Toddlers Ltd | Education | 2012 |
| Northlight Services Ltd | Construction | 2024 |
| Northline Ltd | Wholesale & retail | 2025 |
| Northmere Ventures Ltd | Extraterritorial | 2026 |
| Northmoor Plant Limited | Administrative & support | 2005 |
| Northocean UK Ltd | Wholesale & retail | 2024 |
| Northside Car & Commercial Ltd | Wholesale & retail | 2008 |
| Northside Roofing Ltd | Construction | 2024 |
| Northstar Events Special Ltd | Extraterritorial | 2026 |
| Northvale Industries Ltd | Extraterritorial | 2026 |
| Northvale Management Ltd | Extraterritorial | 2025 |
| Northwood (Doncaster) Limited | Real estate | 2007 |
| Norton Barrie Limited | Wholesale & retail | 1969 |
| Norton Energy Services Limited | Construction | 2011 |
| Norton Kitchens and Bathrooms Limited | Construction | 2023 |
| Norton Tax & Forensic Limited | Professional & scientific | 2024 |
| Norush Logistics Ltd | Transport & logistics | 2025 |
| Norvanta Systems Ltd | Extraterritorial | 2026 |
| Norvexa Ltd | Extraterritorial | 2026 |
| Norvexa Ventures Ltd | Extraterritorial | 2026 |
| Norvexium Logistics Ltd | Extraterritorial | 2026 |
| Norwin Construction Services Limited | Construction | 2009 |
| Norwood 22 Ltd | Construction | 2021 |
| Nosh Street Food Kitchen Limited | Hospitality | 2025 |
| Nostalgic Nibbles Ltd | Wholesale & retail | 2024 |
| Nostell Place Limited | Health & social care | 2010 |
| NOT Just Another Agency Ltd | Information & communication | 2020 |
| Nothing Like This Limited | Arts & recreation | 2024 |
| Nothr Ltd | Information & communication | 2025 |
| Notonsocials.Com Ltd | Extraterritorial | 2025 |
| Nottage Communications Limited | Professional & scientific | 2009 |
| Nottingham Place Investments Ltd | Real estate | 2019 |
| Notts Builder Ltd | Construction | 2025 |