| NNA Taxis Ltd | Transport & logistics | 2021 |
| Nnamdi Healthcare Ltd | Health & social care | 2019 |
| NNB Finance Company (HPC) Ltd | Extraterritorial | 2014 |
| NNB Generation Company (HPC) Limited | Energy | 2009 |
| NNB Holding Company (HPC) Limited | Professional & scientific | 2009 |
| Nness Limited | Wholesale & retail | 2024 |
| Nnxw Limited | Health & social care | 2025 |
| NO 1 Booze Ltd | Wholesale & retail | 2014 |
| NO 1 Premier Ltd | Wholesale & retail | 2012 |
| NO 121 Hairdressing Limited | Other services | 2007 |
| NO 2 College RD (BS8 3JB) Management Limited | Households | 2014 |
| NO 21 Productions Limited | Arts & recreation | 2019 |
| NO 3 Victoria Walk, Cotham Ltd | Households | 1987 |
| NO Borders AI Limited | Information & communication | 2025 |
| NO Boundaries, Good Eats Ltd | Hospitality | 2023 |
| NO Code Sage Limited | Information & communication | 2022 |
| NO Filter Films Ltd | Information & communication | 2025 |
| NO Fuss Marketing Ltd | Professional & scientific | 2025 |
| NO Letting Go (Bristol North) Ltd | Real estate | 2020 |
| NO Mercy Marine Ltd | Information & communication | 2023 |
| NO Niji Ltd | Wholesale & retail | 2022 |
| NO Pest Ltd | Administrative & support | 2024 |
| NO Wonder Music Limited | Information & communication | 2010 |
| NO. 10 Cotham Road Bristol Management Company Limited | Households | 1976 |
| NO. 10 Glasbury House Flats Management Limited | Households | 1976 |
| NO. 11 Clifton Hill (Bristol) Management Limited | Households | 1978 |
| NO. 12 Oakfield Road Management Company Limited(The) | Households | 1980 |
| NO. 120 Redland Road (Bristol) Management Limited | Households | 1990 |
| NO. 14 Whatley Road Clifton (Maintenance) Limited | Households | 1974 |
| NO. 17 Hampton Road Management Company Limited | Hospitality | 1985 |
| NO. 17 Waverley Road Flat Management Company Limited | Real estate | 2006 |
| NO. 18 Vyvyan Terrace Management Company Limited | Households | 1977 |
| NO. 39 Cranbrook Road (Management) Limited | Households | 1982 |
| NO. 4 Buckingham Place Clifton (Management) Limited | Households | 1975 |
| NO. 45 Hairdressing Limited | Other services | 2020 |
| NO. 7 Princes Buildings (Management) Limited | Households | 1984 |
| NO. 8 Lansdown Place East, Bath (Management) Limited | Households | 1982 |
| NO.1 Lounge Park Street Ltd | Wholesale & retail | 2025 |
| NO.1 Turkish Style Barbers Ltd | Other services | 2019 |
| NO.17 Management Limited | Professional & scientific | 2020 |
| NO.4 Clare Road (Management) Limited | Households | 1983 |
| NO.4 Westbury Park Limited | Real estate | 1995 |
| NO2 Nail 15 Ltd | Other services | 2024 |
| NO7.AESTHETICS Ltd | Health & social care | 2023 |
| NO8DO Ltd | Hospitality | 2025 |
| NOA Advisory Services Ltd | Information & communication | 2024 |
| Noah Lott Ltd | Professional & scientific | 2015 |
| Noah Morgan Taylor Limited | Arts & recreation | 2023 |
| Noah's ARK Play Centre Limited | Arts & recreation | 2006 |
| Noah's ARK ZOO Enterprises Limited | Wholesale & retail | 2022 |
| Noah's Ark@Crbc | Education | 2005 |
| Noahlaw Limited | Financial services | 2025 |
| Noajaz Healthcare Ltd | Health & social care | 2022 |
| Noam Healthcare Ltd | Health & social care | 2025 |
| Noble Autos Limited | Wholesale & retail | 2025 |
| Noble Brownlow Associates Limited | Professional & scientific | 2009 |
| Noble Care Professionals Ltd | Administrative & support | 2020 |
| Noble Clinical Ltd | Health & social care | 2025 |
| Noble Crescent Healthcare Ltd | Health & social care | 2014 |
| Noble EAT Limited | Hospitality | 2023 |
| Noble Education Services Ltd. | Education | 2017 |
| Noble Fast Transport Ltd | Transport & logistics | 2025 |
| Noble House (Weston) Limited | Real estate | 2011 |
| Noble SOT Ltd | Manufacturing | 2026 |
| Nobleheir Limited | Households | 1983 |
| Noblewatch Limited | Administrative & support | 2025 |
| Nobody IS Watching Ltd | Wholesale & retail | 2023 |
| Nobus Security Systems Ltd | Administrative & support | 2019 |
| Nock on Wood Ltd | Other services | 2017 |
| Noco Hair Ltd | Other services | 2017 |
| Noctis Group Ltd | Hospitality | 2025 |
| Noctua Ecology Ltd | Professional & scientific | 2021 |
| Nocturn Limited | Real estate | 1974 |
| Nodal Group Limited | Financial services | 2025 |
| Nodpod Hotel Ltd | Hospitality | 2024 |
| Noel Kingsbury Limited | Professional & scientific | 2022 |
| Noelkarn Limited | Arts & recreation | 1978 |
| Noeric Ltd | Information & communication | 2026 |
| Noesisvu Ltd | Hospitality | 2020 |
| Noise Consultants Limited | Professional & scientific | 2017 |
| Noiselabs Consulting Ltd | Information & communication | 2015 |
| Noivivi Ltd | Administrative & support | 2025 |
| Nokia UK Limited | Information & communication | 1991 |
| Noku Ltd | Real estate | 2026 |
| NOL Transport Ltd | Manufacturing | 2014 |
| Nolan Family Group Ltd | Information & communication | 2026 |
| Nolan Pulse Ltd | Information & communication | 2026 |
| Nolan Roll Training Solutions Ltd | Professional & scientific | 2025 |
| Noli's Food Ltd | Hospitality | 2023 |
| NOM Burger Events Ltd | Hospitality | 2024 |
| NOM Wholefoods Ltd | Wholesale & retail | 2019 |
| Noma Architects Ltd | Professional & scientific | 1997 |
| Nomaari Design Ltd | Wholesale & retail | 2025 |
| Nomad Restaurant and Cafe Ltd | Hospitality | 2026 |
| Nomadic Chef Ltd | Hospitality | 2020 |
| Nomadic Running Company Ltd | Arts & recreation | 2019 |
| Nomarad Ltd | Financial services | 2022 |
| Nomex LP | | 2017 |
| NON Solus Communications Ltd | Administrative & support | 2009 |
| Non-Surgical Cosmetic Practitioner Register Ltd | Other services | 2023 |