| Nileus Properties Limited | Real estate | 2021 |
| Nimbuspoint UK Topco Limited | Financial services | 2024 |
| Nina Penlington Bespoke Limited | Wholesale & retail | 2025 |
| Nine Sticks Limited | Construction | 2022 |
| Nine-W Race Engineering Ltd | Manufacturing | 2018 |
| Ninnuola Holdings Limited | Real estate | 2019 |
| Ninnuola Limited | Health & social care | 2013 |
| Nisbet Family Limited Partnership | | 2011 |
| Nitrospark Ltd | Information & communication | 2025 |
| Njabc Ltd | Health & social care | 2024 |
| NJL Management Limited | Real estate | 2023 |
| Nmdvd Ltd | Real estate | 2024 |
| Nmtl Limited | Professional & scientific | 2020 |
| NO Easy Routes Ltd | Professional & scientific | 2023 |
| NO Mess Tins Limited | Hospitality | 2018 |
| NO Rucks Given Ltd | Information & communication | 2025 |
| NO. 10, Oxford Road, Exeter Management Company Limited | Households | 1987 |
| NO. 14 Ltd | Hospitality | 2024 |
| Noah's ARK (Plymouth) Ltd | Hospitality | 2026 |
| Noath Precision Engineering Limited | Professional & scientific | 2025 |
| Nobody Inns Limited | Extraterritorial | 2008 |
| Nocturnal Productions Limited | Administrative & support | 2023 |
| Nodrog Limited | Real estate | 2001 |
| Nolan Consultancy Services Limited | Professional & scientific | 2025 |
| Nolia Drinks Ltd | Manufacturing | 2024 |
| Noma Service Ltd | Wholesale & retail | 2025 |
| Nomad Abodes Limited | Construction | 2020 |
| Nomascus Limited | Health & social care | 2025 |
| NON Stop 88 Ltd | Transport & logistics | 2018 |
| Noodle Shack Asian Street Food Ltd | Hospitality | 2025 |
| Noodles Consultancy Ltd | Real estate | 2019 |
| Nook Community CIC | Hospitality | 2025 |
| Nooko Developments Limited | Construction | 2024 |
| Nooko Paternoster Residential Limited | Real estate | 2024 |
| Noon Edwards Limited | Professional & scientific | 2022 |
| Noon Roberts Holdings Ltd | Financial services | 2017 |
| Noon Roberts Limited | Real estate | 2012 |
| Noori TV Ltd | Information & communication | 2021 |
| Norma Coffee Ltd | Manufacturing | 2025 |
| Normal Magic Community Interest Company | Other services | 2023 |
| Normal Magic Enterprises Limited | Health & social care | 2021 |
| Nortam Finishing Ltd | Manufacturing | 2022 |
| North Barbers Ltd | Other services | 2016 |
| North Coast LOG Cabins Ltd | Manufacturing | 2004 |
| North Devon Chamber of Commerce Limited | Extraterritorial | 2024 |
| North Gate Court (Exeter) Management Company Limited | Households | 1979 |
| North Meadow Developments Ltd | Construction | 2019 |
| North Street Exeter Limited | Construction | 2015 |
| Northernhay Clinic Ltd | Health & social care | 2012 |
| Northernhay Holdings Ltd | Real estate | 2022 |
| Northernhay Limited | Information & communication | 2013 |
| Northleigh House Management Company Limited | Other services | 2005 |
| Northsett Advisory Ltd | Professional & scientific | 2026 |
| Norton Property Management Ltd | Real estate | 2025 |
| Norton Property Solutions Ltd | Real estate | 2020 |
| Norton Stays (London) Ltd | Real estate | 2025 |
| Norton Stays Ltd | Real estate | 2024 |
| Norvert Services Ltd | Agriculture & fishing | 2023 |
| NOT Just Another Baby Limited | Wholesale & retail | 2010 |
| NOT Just Dyslexia Ltd | Extraterritorial | 2009 |
| Nottington Park Management Company Limited | Real estate | 2021 |
| Nourishexe Ltd | Wholesale & retail | 2023 |
| Novadrift Ltd | Transport & logistics | 2024 |
| Novo Timber Ltd | Construction | 2024 |
| Novzes Limited | Wholesale & retail | 2018 |
| Nowfly Ltd | Transport & logistics | 2018 |
| Noyan Enterprise Ltd | Transport & logistics | 2025 |
| NP Electrical Services South West Limited | Construction | 2009 |
| NR Autos Ltd | Wholesale & retail | 2021 |
| NR Exeter Group Ltd | Financial services | 2025 |
| NR Exeter Ltd | Arts & recreation | 2019 |
| NR Exeter Rentals Ltd | Other services | 2025 |
| NR Leslie Consulting Ltd | Professional & scientific | 2021 |
| NRC (Non-Ferro Recovery Company) UK Ltd. | Mining & quarrying | 2022 |
| Nrhc Enterprises Limited | Administrative & support | 2018 |
| NSK Consultants & Logistics Ltd | Transport & logistics | 2025 |
| Nu-Uk Limited | Real estate | 2019 |
| Nubright Limited | Professional & scientific | 2022 |
| Nuclear Engineering and Environmental Services Limited | Professional & scientific | 1993 |
| Numbaninja Ltd | Extraterritorial | 2016 |
| Number 5 Limited | Financial services | 2002 |
| Number Nine EXE Ltd | Real estate | 2019 |
| Numberite Ltd | Information & communication | 2005 |
| Nustar Software Ltd | Information & communication | 2020 |
| Nute Plumbing Services Limited | Construction | 2002 |
| Nutpup Ltd | Wholesale & retail | 2022 |
| Nutrition Architecture Limited | Real estate | 2018 |
| Nutters South West Ltd | Other services | 2022 |
| Nuza Ltd | Real estate | 2026 |
| NV Signalling Ltd | Professional & scientific | 2016 |
| NVA Goals Ltd | Administrative & support | 2022 |
| NXT LVL Exeter Ltd | Hospitality | 2024 |
| O and P Ltd | Manufacturing | 2015 |
| O City Ltd | Hospitality | 2021 |
| O T R Management Company Limited | Professional & scientific | 1995 |
| O'Brien Van DER Steen Studies Community Interest Company | Professional & scientific | 2021 |
| O'Brien Van DER Steen Workshops Limited | Professional & scientific | 2018 |
| O'Brien's (SW) Ltd | Hospitality | 2023 |
| O'Malleys Engineering Ltd | Professional & scientific | 2026 |
| O.J. Gyms Holdings Limited | Financial services | 2021 |