| NO. 1 Vane Street Bath Management Company Limited | Real estate | 2000 |
| NO. 4 Queens Parade Limited | Households | 2023 |
| NO.15 Great Pulteney Ltd | Hospitality | 2015 |
| NO.17 Interiors Ltd | Wholesale & retail | 2023 |
| Noad Roofing Limited | Construction | 2017 |
| Noad Storage Limited | Transport & logistics | 2021 |
| Noble Cleans Group Ltd | Administrative & support | 2025 |
| Noble House Bath Properties Limited | Real estate | 2025 |
| Noble Stays Group Ltd | Real estate | 2025 |
| Nobleprog (UK) Ltd | Other services | 2011 |
| Noctu (Bath) Ltd | Wholesale & retail | 2009 |
| Noiz Electronics Limited | Manufacturing | 2004 |
| Nolos Data Management Ltd | Information & communication | 2017 |
| Nomadsdeli Ltd | Hospitality | 2025 |
| Nonsense Permissible Ltd | Professional & scientific | 2024 |
| Nonstop Adventure Limited | Administrative & support | 2002 |
| Norfolk Buildings(Bath) Management Company Ltd | Real estate | 2026 |
| Norfolk Court (Bath) Limited | Households | 2013 |
| Norland College Limited | Administrative & support | 1923 |
| Norma Projects Limited | Professional & scientific | 2026 |
| Norris Holdings (Bath) Ltd | Financial services | 2024 |
| North Business Consulting Limited | Professional & scientific | 2020 |
| North Coach Properties Limited | Real estate | 2016 |
| North Cyber Limited | Information & communication | 2012 |
| North Parade Publishing Limited | Wholesale & retail | 2001 |
| North Range Management Limited | Households | 2023 |
| North to Four Ltd | Financial services | 2011 |
| Northam Exploration & Consulting Ltd | Mining & quarrying | 2011 |
| Northbrook Court Management Company Limited | Households | 1993 |
| Northend (Holdings) Limited | Financial services | 2010 |
| Northfield House (Bath) Limited | Households | 2006 |
| Northgate Devizes Ltd | Construction | 2024 |
| Northgate Property Bath Ltd | Real estate | 2021 |
| Northgate Training Ltd | Education | 2002 |
| Northover House Management Company Limited | Households | 2004 |
| Northshore Emea Ltd | Professional & scientific | 2023 |
| Northshore IO Limited | Other services | 2020 |
| Northside Events Limited | Professional & scientific | 2005 |
| Northwood Design Limited | Real estate | 2014 |
| Norton Barn Management Co Ltd | Real estate | 2017 |
| Norton Prestige Properties Limited | Real estate | 2019 |
| Norville (20/20) Limited | Manufacturing | 2020 |
| Norwood Dene Management Company Limited | Households | 2017 |
| NOT on the Beeb Ltd | Information & communication | 2025 |
| Noten Dept Ltd | Other services | 2024 |
| Notting Hill Consultants Ltd | Professional & scientific | 2017 |
| Notus Developments Ltd | Real estate | 2025 |
| Noukal Advisory Limited | Professional & scientific | 2020 |
| Nourish Holdings Ltd | Professional & scientific | 2009 |
| Nova Ventum Limited | Professional & scientific | 2025 |
| Novadent (UK) Ltd | Health & social care | 2010 |
| Novia (Gross) Nominee Limited | Financial services | 2008 |
| Novia (ISA) Nominee Limited | Financial services | 2008 |
| Novia (NET) Nominee Limited | Financial services | 2008 |
| Novia Financial PLC | Financial services | 2008 |
| Novia Financial Services Ltd. | Financial services | 2014 |
| Novia Global Holdings Limited | Financial services | 2023 |
| Novia Global Limited | Financial services | 2014 |
| Novia Global Services Limited | Financial services | 2021 |
| Novo Components Group Limited | Professional & scientific | 2012 |
| Novo Construction & Development Limited | Construction | 2021 |
| Novus Investments Limited | Professional & scientific | 2012 |
| NOW Bath Limited | Information & communication | 2012 |
| NOW, Next & Then Ltd | Health & social care | 2021 |
| Noya's Garden Limited | Education | 2024 |
| Noya's Kitchen Ltd | Hospitality | 2015 |
| NPD Essentials Consultancy Limited | Professional & scientific | 2017 |
| NRJ Projects Ltd | Information & communication | 2017 |
| Nrsd Investments Ltd | Health & social care | 2016 |
| NSC Accounting Services Limited | Professional & scientific | 2014 |
| Nuclear Security International Ltd | Professional & scientific | 2012 |
| Nucleus Developments Limited | Real estate | 2003 |
| Nucleus International Limited | Manufacturing | 2007 |
| Number 17 Bath Limited | Real estate | 2014 |
| Number 5 Walcot Terrace (Bath) Limited | Households | 1997 |
| Number 8 Bath Limited | Health & social care | 2011 |
| Number One Food Ltd | Hospitality | 2026 |
| Number One Park Lane Consulting Ltd | Education | 2022 |
| Number Resource Limited | Education | 2024 |
| Nurry LEE Music Ltd | Education | 2023 |
| Nutra Brands Ltd | Wholesale & retail | 2015 |
| Nutrisport Limited | Manufacturing | 1999 |
| NVH International Ltd | Professional & scientific | 2022 |
| Nwws Limited | Professional & scientific | 2005 |
| Nyanza Express Transport and Training Ltd | Transport & logistics | 2017 |
| O Sadler Design Ltd | Manufacturing | 2020 |
| O&M Mansbridge Ltd | Arts & recreation | 2023 |
| Oak and Chrome (Detailing) Limited | Administrative & support | 2025 |
| Oak and Chrome Limited | Administrative & support | 2025 |
| Oak Island Properties Limited | Real estate | 2026 |
| Oak ROW Automotive Limited | Wholesale & retail | 2023 |
| Oaklands Court (Bristol) Management Limited | Administrative & support | 2007 |
| Oaksey Limited | Financial services | 1994 |
| Obi-Wine-Kenobi Limited | Wholesale & retail | 2021 |
| Occupational Performance Solutions Ltd | Other services | 2021 |
| Occupational Therapy for Children Ltd | Health & social care | 2010 |
| Ocean Green Developments Ltd | Professional & scientific | 2025 |
| Ocean Retail Group Ltd | Administrative & support | 2021 |
| Ochre Investment Ltd | Financial services | 2024 |
| October Media Limited | Information & communication | 2024 |