| Nimoi Ventures Limited | Professional & scientific | 2025 |
| Nine Circles Limited | Wholesale & retail | 1997 |
| NIS Electrical Limited | Construction | 2020 |
| Nitu Housing Limited | Real estate | 2025 |
| NJB Leadworks Limited | Construction | 2019 |
| NJB Surveying Ltd | Professional & scientific | 2021 |
| Nkerose Limited | Health & social care | 2017 |
| NKP Restaurants Limited | Hospitality | 2025 |
| Nlrf Electrical Services Ltd | Manufacturing | 2020 |
| Nmbath Consulting Limited | Information & communication | 2017 |
| NMG Property Law Ltd | Professional & scientific | 2025 |
| Nmstephenson Ltd | Manufacturing | 2023 |
| Nn&A 8 Limited | Hospitality | 2022 |
| NNA Brockworth Limited | Financial services | 2024 |
| NNA Developments Limited | Construction | 2025 |
| NNA Holdings Ltd | Financial services | 2024 |
| NNA Limited | Hospitality | 2008 |
| Nnba Limited | Real estate | 2023 |
| NO 76 (Coffee and Confectionary) Limited | Hospitality | 2024 |
| NO 8 Joinery Limited | Construction | 2024 |
| NO Control Fitness Ltd | Education | 2025 |
| NO Limits Photobooth Ltd | Professional & scientific | 2023 |
| No-Brainer Containers Ltd | Other services | 2018 |
| Noah Pikes Racing Ltd | Arts & recreation | 2015 |
| Noah's Childrens Nursery Limited | Education | 2013 |
| Noamishipping Ltd | Transport & logistics | 2025 |
| Noble Arts Penkett Limited | Real estate | 2016 |
| Noble Furnishings Limited | Manufacturing | 2013 |
| Noctivus Ltd | Hospitality | 2025 |
| Noctryn Ltd | Administrative & support | 2025 |
| Noddy Limited | Hospitality | 2024 |
| Noire Smith Limited | Wholesale & retail | 2025 |
| Noisia Vision Ltd | Information & communication | 2021 |
| Nolan Services Ltd | Health & social care | 2015 |
| Norah Matson Locum Ltd | Health & social care | 2023 |
| Noralis Ltd | Mining & quarrying | 2011 |
| Nordic Nurture Ltd | Health & social care | 2023 |
| Norfolk & Whey Limited | Information & communication | 2018 |
| Norman UX Limited | Professional & scientific | 2026 |
| Norris Installations Limited | Construction | 2016 |
| North and South Court (Benhall) Management Company Limited | Households | 2006 |
| North and West Gloucestershire Citizens Advice Limited | Information & communication | 2002 |
| North by South-West Limited | Financial services | 2024 |
| North Chorus Ltd | Professional & scientific | 2024 |
| North Cotswold Medical Limited | Health & social care | 2019 |
| North Gloucestershire Motorcycle Club Limited | Arts & recreation | 1986 |
| North Point WQ Management Company Ltd | Real estate | 2025 |
| North Star Aligned Ltd | Health & social care | 2026 |
| North Watford PCN Limited | Health & social care | 2026 |
| Northbound Clothing Ltd | Wholesale & retail | 2025 |
| Northfield Residential Holdings Limited | Construction | 2024 |
| Northgate Court (Gloucester) Management Company Ltd | Households | 2017 |
| Northgate Premier Ltd | Wholesale & retail | 2025 |
| Northover Properties Ltd | Real estate | 2024 |
| Norton Fruit Farm Management Company Limited | Households | 2021 |
| Norton Growing Space C.I.C. | Agriculture & fishing | 2026 |
| Norton Rugby Football Club Ltd | Arts & recreation | 2021 |
| Norton Stone and Masonry Ltd | Construction | 2010 |
| Norville Brothers Limited | Real estate | 2016 |
| Norville Limited | Real estate | 2017 |
| Norville Optical Company Limited | Extraterritorial | 1957 |
| Norwin Ltd | Construction | 2009 |
| Notaro Mcgurk Limited | Construction | 2018 |
| Nova Abode Ltd | Real estate | 2023 |
| Novara Consulting Group Limited | Administrative & support | 2023 |
| Noventra Project Services Ltd | Professional & scientific | 2026 |
| Novex Software Limited | Information & communication | 2019 |
| Nowruz Kebabs Ltd | Hospitality | 2025 |
| NP Properties (Glos) Ltd | Real estate | 2021 |
| NP Satherley Decorators Ltd | Construction | 2011 |
| Nrdr Ltd | Professional & scientific | 2015 |
| NRK Retail Ltd | Professional & scientific | 2019 |
| NRT Motors Limited | Wholesale & retail | 2014 |
| NS & DM H-Ward Catering Ltd | Hospitality | 2022 |
| NS Green Driving Services Limited | Transport & logistics | 2017 |
| NSC UK Consulting Ltd | Professional & scientific | 2023 |
| Nsde Services Ltd | Transport & logistics | 2023 |
| Nsgl Limited | Administrative & support | 2011 |
| Ntlt Limited | Real estate | 2019 |
| NU Mech Ltd | Other services | 2020 |
| NU Media Consultants Ltd | Information & communication | 2025 |
| Nu-Homes (South West) Limited | Construction | 2024 |
| Nu-Landscapes Limited | Administrative & support | 2003 |
| Nuclear Commissioning Services Limited | Administrative & support | 2018 |
| Nuclear Consulting Digital Limited | Administrative & support | 2022 |
| Nuclear Consulting Training Limited | Administrative & support | 2022 |
| Nuclear Contractors Limited | Professional & scientific | 2013 |
| Nuclear Engineering Limited | Professional & scientific | 2013 |
| Nuclear Training Services Limited | Education | 2023 |
| Nude Holdings 25 Ltd | Construction | 2025 |
| Nudelbaum Ltd | Professional & scientific | 2026 |
| NUE Ground Studios Ltd | Hospitality | 2023 |
| NUE Group Limited | Hospitality | 2023 |
| Nuevo Group Ltd | Professional & scientific | 2020 |
| Nugent Building Contractors Limited | Construction | 2014 |
| Numa Tech Limited | Wholesale & retail | 2023 |
| Number 13 Ltd | Professional & scientific | 2018 |
| Number Plate Draw Limited | Arts & recreation | 2025 |
| Number Twenty-Four Alexandra Road Residents Association Limited | Households | 2023 |
| Numold (UK) Limited | Manufacturing | 1993 |