| Mlki Ltd | Professional & scientific | 2024 |
| Modern English Garden Design Limited | Administrative & support | 2014 |
| Monitall UK Limited | Professional & scientific | 2024 |
| Monument Plumbing & Heating Limited | Construction | 2004 |
| Moor Exchange Limited | Construction | 2014 |
| Moorhayes Solutions Ltd | Professional & scientific | 2010 |
| Mountstephen Estate Management Company Limited | Households | 2003 |
| MPS Global Agency Limited | Wholesale & retail | 2014 |
| MRH MS Limited | Hospitality | 2016 |
| MRS Rolt's Tea Rooms Limited | Hospitality | 2023 |
| Mrsportsuk Ltd | Wholesale & retail | 2025 |
| Mwpm Ltd | Professional & scientific | 2014 |
| N Kose Property & Real Estate Ltd | Real estate | 2026 |
| Nadder Court (Exeter) Limited | Households | 1976 |
| Neat Strategy Limited | Information & communication | 1990 |
| Neil Williamson Associates Limited | Professional & scientific | 2015 |
| Netshop Enterprises Limited | Wholesale & retail | 2003 |
| Nibsport Racing Limited | Arts & recreation | 2024 |
| NJD Easy Accountancy Ltd | Professional & scientific | 2025 |
| NJT Property Investment Ltd | Real estate | 2022 |
| Noble Elements Ltd | Wholesale & retail | 2026 |
| Nordera Ltd | Wholesale & retail | 2025 |
| Nosh Cullompton Ltd | Hospitality | 2025 |
| Nostra Comms Limited | Professional & scientific | 2022 |
| NS Aero Limited | Professional & scientific | 2016 |
| Nutrismart Supplements Ltd | Wholesale & retail | 2026 |
| Nutz About Cleaning Limited | Other services | 2018 |
| Oak Court MGT. Company Limited | Professional & scientific | 2014 |
| Oak Park Dairy Ltd | Manufacturing | 2019 |
| OCP Supplies Ltd | Manufacturing | 2015 |
| OIL Tank Replacements Ltd | Construction | 2019 |
| Old Barn Estates Ltd | Professional & scientific | 2025 |
| Old Bridwell Cottages Management Company Limited | Households | 2022 |
| Old Bridwell Walled Garden Limited | Households | 2023 |
| Omnis Coaching Europe Limited | Other services | 2007 |
| Oncovet Ltd | Professional & scientific | 2026 |
| Oneterra Consulting Limited | Information & communication | 2023 |
| Only Once Dress Hire Limited | Wholesale & retail | 2019 |
| Orchard Facial Aesthetics Ltd | Other services | 2020 |
| Orchid Palace Ltd | Hospitality | 2022 |
| Origin Creative Ltd | Professional & scientific | 2024 |
| Osteo and Physio Cullompton Ltd | Health & social care | 2020 |
| Otter Vale Products Ltd | Manufacturing | 2014 |
| Otterdene Group Ltd | Financial services | 2023 |
| Otterdene Limited | Wholesale & retail | 2017 |
| P&R Surfacing Ltd | Construction | 2023 |
| P.Hawkins Bricklaying & Construction Ltd | Construction | 2019 |
| PA Quality Solutions Ltd | Professional & scientific | 2024 |
| Paco Perfumerias SL Ltd | Wholesale & retail | 2023 |
| Paint Monkey Ltd | Wholesale & retail | 2014 |
| Palazzo Limited | Real estate | 2016 |
| Pall-Ex South West Limited | Transport & logistics | 2004 |
| Panda Consultancy XZ Ltd | Administrative & support | 2024 |
| Panjab Enterprise Ltd | Construction | 2025 |
| Pannywreckerproductions Ltd | Arts & recreation | 2024 |
| Parrabbola | Arts & recreation | 2010 |
| Patch Cord Media Ltd | Information & communication | 2024 |
| Patriot RV UK Limited | Wholesale & retail | 2025 |
| Paws 4 Play Ltd | Other services | 2021 |
| Paxout Limited | Professional & scientific | 2022 |
| Pearson & Pearson (Communications) Ltd | Professional & scientific | 2024 |
| Pencarrie Holdings Limited | Financial services | 2018 |
| Pencarrie Limited | Wholesale & retail | 1997 |
| Penkart Shopping Ltd | Wholesale & retail | 2025 |
| Peppermill Recruitment Ltd | Administrative & support | 2019 |
| Perimeter Cyber Security Solutions Ltd | Professional & scientific | 2024 |
| Peris Hydro Limited | Energy | 2013 |
| Perseveres Consulting Limited | Professional & scientific | 2023 |
| Persey Properties Limited | Real estate | 2023 |
| Peta Electrical Ltd | Construction | 2020 |
| Peter Wilding Associates Limited | Professional & scientific | 2002 |
| Petersen Engineering Limited | Manufacturing | 2017 |
| PEV Investments Limited | Real estate | 2024 |
| Phoenix Cellar Services Limited | Administrative & support | 2003 |
| Phoenix Performance Exhausts Limited | Manufacturing | 1996 |
| Phoenix Running Devon Ltd | Arts & recreation | 2025 |
| Phototeq Limited | Wholesale & retail | 2018 |
| Pine Property Co. Limited | Real estate | 1975 |
| Pioneer Supplies Ltd | Wholesale & retail | 2013 |
| Pipers & Co Trading Ltd | Wholesale & retail | 2025 |
| Pippins Aviation Services Ltd | Manufacturing | 2019 |
| Place Land Limited | Construction | 2019 |
| Placewise Limited | Professional & scientific | 2009 |
| Plymtree Lifestyle Limited | Wholesale & retail | 2018 |
| Poemsoflife Limited | Professional & scientific | 2018 |
| Polar Wealth Management Limited | Professional & scientific | 2017 |
| Polino Foods Ltd | Hospitality | 2026 |
| Pollington Decorators Ltd | Administrative & support | 2002 |
| Polly Sailing Occasions LLP | | 2020 |
| Porcupine PR Limited | Professional & scientific | 2000 |
| Position 1 Moto Ltd | Wholesale & retail | 2020 |
| Position 1 Race & Performance Equipment Ltd | Wholesale & retail | 2015 |
| Postwood Gardens Campsite Ltd | Hospitality | 2021 |
| Powerboat and RIB Limited | Information & communication | 1995 |
| Precision Paint Limited | Wholesale & retail | 2008 |
| Premier Commercial (Devon) Ltd | Wholesale & retail | 2014 |
| Pressure Washers SW Investments Limited | Real estate | 2003 |
| Pressure Washers SW Limited | Other services | 1984 |
| Prianka.Wi. Ltd | Wholesale & retail | 2023 |
| Prime Paving & Masonry Ltd | Administrative & support | 2024 |