| Modol Limited | Real estate | 2010 |
| Moffat Capital Ltd | Financial services | 2025 |
| Moneymatchmaker Ltd | Information & communication | 2026 |
| Moor View Terrace Freehold Company Ltd | Households | 2021 |
| Moorland Auto Solutions Limited | Wholesale & retail | 2009 |
| Morek Consulting Ltd | Professional & scientific | 2022 |
| Morning Media Ltd | Administrative & support | 2011 |
| Motion Gym South West Ltd | Arts & recreation | 2026 |
| Motion Training South West Limited | Arts & recreation | 2025 |
| MOW Consulting Limited | Professional & scientific | 2025 |
| Muthu & Co Limited | Wholesale & retail | 2013 |
| Mutts & Hounds Limited | Wholesale & retail | 2012 |
| MW and ML Limited | Hospitality | 2023 |
| MW Construction Limited | Real estate | 2019 |
| My Mind & Body Performance Coach Ltd | Other services | 2026 |
| Myam Properties Limited | Professional & scientific | 2004 |
| Myrna Group Limited | Financial services | 2020 |
| Myrna Holdings Limited | Financial services | 2017 |
| N&T Accountancy Ltd | Professional & scientific | 2021 |
| NAA Engineering Ltd | Professional & scientific | 2014 |
| Nabarnish Investments Limited | Real estate | 2023 |
| Nala's Pet Co. Ltd | Wholesale & retail | 2025 |
| Nanmanest Limited | Real estate | 2000 |
| Nature Wave Community Interest Company | Professional & scientific | 2025 |
| Naval Engineering Support Consultancy Limited | Professional & scientific | 2022 |
| Nbstraining Ltd | Professional & scientific | 2013 |
| Neal Associates Limited | Financial services | 2013 |
| Neal Home Improvements Ltd | Construction | 2025 |
| Nettle Limited | Information & communication | 2024 |
| Networking for Golfers Limited | Information & communication | 2021 |
| Neuroimaging Ltd | Health & social care | 2018 |
| New Road Supermarket Limited | Wholesale & retail | 2024 |
| New View Windows & Conservatories SW Limited | Manufacturing | 2008 |
| Newco 195 Limited | Financial services | 2026 |
| Nicole Elders Ltd | Arts & recreation | 2023 |
| NLB Group South West Limited | Administrative & support | 2019 |
| NO Quibble Quilt Company Ltd | Wholesale & retail | 2012 |
| North Wayton Farm Ltd | Hospitality | 2021 |
| Notter Services Ltd | Professional & scientific | 2022 |
| Nova Visuals Ltd | Information & communication | 2024 |
| NTA Interiors Ltd | Construction | 2025 |
| Oak Builds SW Ltd | Construction | 2024 |
| Oakwood Roofing Ltd | Construction | 2019 |
| Ocean City Marketing Ltd | Information & communication | 2020 |
| Ocean City Retreats Ltd | Hospitality | 2021 |
| OK Software Holdings Limited | Administrative & support | 2021 |
| Oman Fitness Co Limited | Administrative & support | 2025 |
| ON Target Games Ltd | Arts & recreation | 2023 |
| One Elwell Limited | Real estate | 2017 |
| One for the Road Mobile Bars Ltd | Hospitality | 2026 |
| Oppo Property Investment Ltd | Real estate | 2022 |
| Optiadapt CIC | Health & social care | 2019 |
| Opulent Lifestyle Solutions Ltd | Construction | 2026 |
| Orbital Cleaning Group Ltd | Administrative & support | 2023 |
| OT Concierge Ltd | Wholesale & retail | 2022 |
| Oudejans Interiors Limited | Professional & scientific | 2017 |
| Outland Road LLP | | 2023 |
| Overseas Property Management & Lettings (Franchise) Ltd | Real estate | 2008 |
| P C Doney Electrics (SW) Limited | Construction | 2010 |
| P C Wines Ltd | Households | 2014 |
| P P Investors Ltd | Construction | 2017 |
| P&P Stonework Ltd | Construction | 2023 |
| PADEL44 Ltd | Administrative & support | 2007 |
| Palmers of Tavistock Limited | Wholesale & retail | 2004 |
| Paragon Building Group Ltd | Construction | 2024 |
| Parcel Express Limited | Real estate | 1997 |
| Parsonage Developments Limited | Construction | 2003 |
| Paul Bray & SON Ltd | Wholesale & retail | 2003 |
| Paul Clark Fine Art & Consultancy Ltd | Wholesale & retail | 2022 |
| Paul David Hughes Limited | Extraterritorial | 2025 |
| Paul Marie-Hughes Ltd | Extraterritorial | 2024 |
| Paul Slater Images Ltd | Professional & scientific | 2016 |
| Pengover Farm Barns Management Company Ltd | Households | 2026 |
| Peninsula Family Property Ltd | Real estate | 2024 |
| Peninsula Family Wellness Limited | Health & social care | 2008 |
| Penny's Cleaning Ltd | Administrative & support | 2023 |
| Pentillie Castle Events Limited | Arts & recreation | 2012 |
| Penton Creative Ltd | Information & communication | 2019 |
| Pentyme Solutions Ltd | Information & communication | 2011 |
| Peppiatt Paper Dishes Limited | Manufacturing | 2025 |
| Performance Webmarketing Limited | Administrative & support | 2001 |
| PKK Hand Car Wash Ltd | Wholesale & retail | 2024 |
| Plimto Developments Limited | Construction | 1994 |
| Plimto Holdings Limited | Real estate | 1985 |
| Plymouth City Roller Derby C.I.C. | Arts & recreation | 2011 |
| Plymouth Maritime UK Ltd | Transport & logistics | 2017 |
| Plymouth Rubbish Removal Ltd | Transport & logistics | 2022 |
| Plymouth Vehicle Cosmetics Ltd | Wholesale & retail | 2025 |
| Plympton Developments Limited | Real estate | 2002 |
| PMR Investment Holdings Ltd | Real estate | 2026 |
| Pmsr Global Limited | Real estate | 2020 |
| Port Eliot House and Gardens Ltd | Administrative & support | 2018 |
| Port Eliot Produce Ltd | Manufacturing | 2020 |
| Powerprime Holdings Limited | Hospitality | 1996 |
| Powerprime Limited | Hospitality | 1997 |
| Powertoolmate Prizes Limited | Professional & scientific | 2021 |
| Practical Prompt Solutions (SW) Ltd | Administrative & support | 2020 |
| PRB Carpentry & Joinery Ltd | Construction | 2018 |
| Precise Shopfitting Limited | Construction | 2014 |
| Preparehq Ltd | Wholesale & retail | 2025 |