| New LUX Ltd | Extraterritorial | 2012 |
| New Park Car Valeting Limited | Wholesale & retail | 2017 |
| New Town Films Limited | Information & communication | 2000 |
| New York DOT COM Ltd | Extraterritorial | 2012 |
| New York Imperial Limited | Extraterritorial | 2020 |
| New York Style Deli Ltd | Extraterritorial | 2012 |
| Newall Homes Limited | Construction | 2019 |
| Newbay Associates Limited | Real estate | 2014 |
| Newland Street Ltd | Real estate | 2019 |
| Newmore Consultants Limited | Professional & scientific | 2016 |
| Newport Homecare Ltd | Health & social care | 2026 |
| Newsagentsads.Com Ltd | Administrative & support | 2013 |
| Newschoice Limited | Information & communication | 2012 |
| Newton Barns Management Limited | Households | 1997 |
| Newton Electrical Contractors Limited | Construction | 2008 |
| Next - UP Limited | Information & communication | 2017 |
| Next Chapter Strategy Ltd | Professional & scientific | 2022 |
| Next Home Group Ltd | Real estate | 2023 |
| Nexus Corporate Ltd | Information & communication | 2025 |
| Nexus Digital Services Ltd | Information & communication | 2007 |
| Nexus IT Consultancy Limited | Information & communication | 2000 |
| Nfan Limited | Other services | 2011 |
| Nforce Parking Management Ltd | Transport & logistics | 2018 |
| Nforce Parking Services Limited | Transport & logistics | 2025 |
| NGJ Locum Ltd | Professional & scientific | 2018 |
| NHG Vehicle Care Ltd | Wholesale & retail | 2023 |
| Nibble International Group Ltd | Wholesale & retail | 2026 |
| Niche Design Architects Ltd | Professional & scientific | 2010 |
| Nicholas Price Limited | Professional & scientific | 2018 |
| Nick Andralojc Limited | Construction | 2008 |
| Nickandwendy Limited | Financial services | 2018 |
| Nicki Ltd | Extraterritorial | 2013 |
| Nicky Jones Executive Limited | Administrative & support | 2011 |
| Nicola Burns Accountancy Services Limited | Professional & scientific | 2013 |
| Nicoladixoneducation Ltd | Education | 2019 |
| Nidd Business Services Ltd | Professional & scientific | 2011 |
| Nidd Construction Ltd | Construction | 2021 |
| Nidd Consulting Ltd | Professional & scientific | 2023 |
| Nidd Finance Ltd | Financial services | 2025 |
| Nidd Health Consulting Ltd | Professional & scientific | 2026 |
| Nidd Leisure Limited | Administrative & support | 2021 |
| Nidd Management Services Ltd | Professional & scientific | 2018 |
| Nidd Manor Management Limited | Households | 2012 |
| Nidd Moor Developments Limited | Real estate | 2007 |
| Nidd Networks Ltd | Information & communication | 2021 |
| Nidd Properties Ltd | Real estate | 2021 |
| Nidd Valley Agencies Limited | Wholesale & retail | 2003 |
| Nidd Valley Stone Limited | Mining & quarrying | 2008 |
| Nidd View Sales Limited | Wholesale & retail | 2025 |
| Nidderdale Capital Limited | Real estate | 2017 |
| Nidderdale Car Sales Ltd | Manufacturing | 2011 |
| Nidderdale Electrical Limited | Construction | 2023 |
| Nidderdale Estates Ltd | Construction | 2011 |
| Nidderdale Group Limited | Administrative & support | 2022 |
| Nidderdale Gymnastics Ltd | Education | 2017 |
| Nidderdale Hall Management Company Limited | Households | 1997 |
| Nidderdale Holiday Cottages Ltd | Hospitality | 2021 |
| Nidderdale Lavender Limited | Agriculture & fishing | 2026 |
| Nidderdale Limited | Wholesale & retail | 2015 |
| Nidderdale Living Ltd | Real estate | 2023 |
| Nidderdale Motors Limited | Real estate | 1948 |
| Nidderdale Roofing Supplies Ltd | Construction | 2020 |
| Nidderdale Solutions Limited | Information & communication | 2018 |
| Nidderdale's Hidden GEM Limited | Hospitality | 2003 |
| Niddside Electrical Limited | Construction | 2009 |
| Nidec SR Drives Ltd. | Professional & scientific | 1980 |
| Nigel Fisher Limited | Wholesale & retail | 2013 |
| Nigel K Abbott Services Limited | Professional & scientific | 2020 |
| Nigel Morris Decorator Limited | Wholesale & retail | 2003 |
| Nigella Limited | Extraterritorial | 2020 |
| Nightspace Limited | Real estate | 2015 |
| Niki Thorpe Photography Ltd | Professional & scientific | 2019 |
| Nikolai Limited | Extraterritorial | 2026 |
| Nimara Group Limited | Wholesale & retail | 2021 |
| Nimshaw Topco Limited | Financial services | 2026 |
| Nina Ritchie Limited | Extraterritorial | 2021 |
| Ninesussexstreet Ltd | Real estate | 2025 |
| Ninetales Tattoo Ltd | Arts & recreation | 2026 |
| Ninety and One TEN Ltd | Wholesale & retail | 2017 |
| Ninety Two Ventures Ltd | Real estate | 2018 |
| Ninja Gorilla Limited | Information & communication | 2015 |
| Nippers Nursery (Yorkshire) Ltd | Health & social care | 2009 |
| Nitto Ltd | Extraterritorial | 2012 |
| NJ & RJ Holdings Limited | Financial services | 2025 |
| NKT (U.K.) Ltd | Wholesale & retail | 2004 |
| NLG Commercial Limited | Real estate | 2025 |
| NLG Homes Limited | Real estate | 2022 |
| NLG Portfolio Limited | Real estate | 2023 |
| NLG Portfolio Two Limited | Real estate | 2024 |
| NLG Property Management Limited | Real estate | 2023 |
| NLG SUB Limited | Real estate | 2023 |
| Nlgproperty Limited | Real estate | 2016 |
| NLJ Consultancy Services Limited | Information & communication | 2024 |
| NLL Harrogate Ltd | Health & social care | 2023 |
| NM Residential Limited | Professional & scientific | 2023 |
| NMK Design Limited | Professional & scientific | 2023 |
| NN Power Limited | Extraterritorial | 2012 |
| NO Agenda Ltd | Extraterritorial | 2012 |
| NO Cheques Limited | Extraterritorial | 2012 |
| NO FIX NO FEE Ltd | Extraterritorial | 2012 |