| Newtabb Limited | Wholesale & retail | 2011 |
| Newton Abbot and District Co-Operative Allotment Association Ltd | Administrative & support | 2002 |
| Newton Abbot Community Interest Company | Health & social care | 2008 |
| Newton Abbot Community Transport Association | Transport & logistics | 2008 |
| Newton Abbot Community Trust | Arts & recreation | 2011 |
| Newton Abbot Pizza and Kebab House Ltd | Hospitality | 2026 |
| Newton Abbot Rugby Football Club Limited | Arts & recreation | 2008 |
| Newton Abbot Security Trust Limited | Administrative & support | 2014 |
| Newton Abbot Station Taxis Limited | Transport & logistics | 2011 |
| Newton Abbot Visionplus Limited | Wholesale & retail | 1991 |
| Newton Builders Limited | Construction | 2013 |
| Newton Homecare & Support Ltd | Public administration | 2025 |
| Newton Locks Limited | Manufacturing | 2024 |
| Newton Mobiles LP | | 2022 |
| Newton Motor Bodies Service Ltd | Wholesale & retail | 2024 |
| Newton Motor Repairs Limited | Wholesale & retail | 2010 |
| Newton Pet & Aquatics Ltd | Wholesale & retail | 2017 |
| Newton Pizzeria ZD Ltd | Hospitality | 2024 |
| Newton Print Limited | Manufacturing | 2004 |
| Newton Renovations Ltd | Construction | 2018 |
| Newton Self Storage Devon Ltd | Other services | 2022 |
| Newton Vehicle Repair Centre Ltd | Wholesale & retail | 2025 |
| Nexahomes Ltd | Real estate | 2025 |
| Nexmove Riviera Ltd | Real estate | 2026 |
| Nexmovetgn Ltd | Real estate | 2024 |
| Next GEN SW Ltd | Construction | 2023 |
| Nextgen Garage Ltd | Wholesale & retail | 2025 |
| Nexus Analytics Ltd | Professional & scientific | 2018 |
| NFP Property Developments Limited | Construction | 2004 |
| NGB (Devon) Limited | Real estate | 2011 |
| Nick Harman Publishing Limited | Information & communication | 2006 |
| Nick Walker Printing Limited | Manufacturing | 2005 |
| Nicofe Materials Limited | Wholesale & retail | 2010 |
| Nicofe Properties Limited | Construction | 2019 |
| Nicola Harker Coaching Consultancy Limited | Professional & scientific | 2026 |
| Nigel Bishop Motoring Limited | Wholesale & retail | 2012 |
| Nilofer Mahmood Anaesthesia Services Limited | Health & social care | 2019 |
| Nippy Normans Limited | Wholesale & retail | 2003 |
| Njball Ltd | Health & social care | 2025 |
| Njley Limited | Construction | 2024 |
| NJS Pubs Ltd | Hospitality | 2024 |
| NM Heating and Commercial Catering Ltd | Construction | 2026 |
| Nndr Ltd | Transport & logistics | 2019 |
| NO 1 Western Road Management Limited | Households | 2002 |
| NO 31 Hair Design Ltd | Other services | 2023 |
| NO7 Motorsport Ltd | Wholesale & retail | 2021 |
| Nook House Ltd | Hospitality | 2025 |
| Norden Meadows (Kingsbridge) Management Company Ltd | Households | 2022 |
| Norman Group Holdings Ltd | Professional & scientific | 2026 |
| North Bengal Food Limited | Hospitality | 2025 |
| Northeast Tanks Ltd | Real estate | 2023 |
| Northlight Psychological Services Ltd | Health & social care | 2025 |
| Northwood (Exeter) Limited | Real estate | 2005 |
| Norwegian Broadcast Services Ltd | Information & communication | 2026 |
| Noteworthy Properties Limited | Real estate | 1963 |
| Novobuild (South West) Limited | Construction | 2015 |
| NQN Ltd | Construction | 2020 |
| NR Hunt Ltd | Construction | 2020 |
| NU Metropolis Limited | Information & communication | 2010 |
| NUE Design Ltd | Wholesale & retail | 2019 |
| Nurturance Ltd | Information & communication | 2023 |
| Nutri-Link Limited | Wholesale & retail | 1998 |
| Nuts About YOU Ltd | Hospitality | 2025 |
| Nuttall Wealth Management Ltd | Financial services | 2015 |
| Nuveya Life Limited | Education | 2019 |
| Nuvo Futura Limited | Professional & scientific | 2000 |
| Nwsw Ltd | Arts & recreation | 2023 |
| Nxmve Group Ltd | Financial services | 2021 |
| Nxmvetgn Ltd | Real estate | 2021 |
| Nyasa Properties Ltd | Hospitality | 2020 |
| O&K Carpentry Ltd | Construction | 2020 |
| O22 Holding Co 3 Ltd | Wholesale & retail | 2024 |
| Oak Grove Ventures Limited | Real estate | 2024 |
| Oak Place Restoration Limited | Wholesale & retail | 2023 |
| Oak Tree Autos Ltd | Wholesale & retail | 2024 |
| Oaka Vending Devon & Cornwall Ltd | Wholesale & retail | 2024 |
| Oakbury Fire and Security Ltd | Professional & scientific | 2021 |
| Oakford Motoring Centre Ltd | Manufacturing | 2012 |
| Oakyarde Digital Ltd | Manufacturing | 2020 |
| OB Contractors (SW) Limited | Construction | 2020 |
| Obsidian 22 Ltd | Administrative & support | 2021 |
| OCB Electrical Contractors Ltd | Construction | 2026 |
| Occasional Cards & Gifts Limited | Wholesale & retail | 2013 |
| Ocean Valour Surveys Limited | Professional & scientific | 2020 |
| OFF Grid Energy SW Ltd | Construction | 2024 |
| Office Support Lancaster Limited | Administrative & support | 2012 |
| Official Freshers Ltd | Professional & scientific | 2016 |
| Oggy Oggy Bodmin Limited | Hospitality | 2015 |
| Ogilvie Plumbing & Heating Ltd | Construction | 2019 |
| Ogwell Grange Limited | Health & social care | 2004 |
| Oilmasters (Devon Dorset & Cornwall) Ltd | Other services | 2006 |
| Oinkers at Drakes Farm Ltd | Wholesale & retail | 2017 |
| OKA Carpentry Limited | Construction | 2024 |
| OLC Properties Limited | Professional & scientific | 2015 |
| Old Mill Garage Limited | Wholesale & retail | 2008 |
| Olex Drainage Ltd | Construction | 2024 |
| Olex Solutions Ltd | Information & communication | 2025 |
| Olive Domino Limited | Financial services | 2021 |
| Olympus Building Services Limited | Wholesale & retail | 2012 |
| Olympus Crossfit Ltd | Arts & recreation | 2024 |