| Limitless Networks Limited | Information & communication | 2012 |
| Lin's Garden Somerset Limited | Hospitality | 2021 |
| Little Munchkins Childcare C.I.C. | Health & social care | 2015 |
| Little Munchkins Day Nursery & PRE School Ltd | Education | 2025 |
| Loaring Development Ltd | Construction | 2011 |
| Lordleaze Lane Management Company Limited | Administrative & support | 1991 |
| Loreol Limited | Health & social care | 2018 |
| Love Letter Cosmetics Ltd | Manufacturing | 2025 |
| LS - Specialist Cleaning Services Ltd | Administrative & support | 2023 |
| Lucas Direct Sale Limited | Wholesale & retail | 2026 |
| LW Financial Services Ltd | Professional & scientific | 2025 |
| Lyme Consulting Limited | Construction | 2024 |
| Lyme Kayak Hire Limited | Administrative & support | 2015 |
| M Howell Healthcare Limited | Health & social care | 2019 |
| M J Culverwell Ltd | Construction | 2015 |
| M Leake Heating Limited | Construction | 2014 |
| M5 Rentals Ltd | Administrative & support | 2025 |
| Mackay Gardening Services Limited | Administrative & support | 2024 |
| Magdalen Events Ltd | Arts & recreation | 2010 |
| Magdalen Farm Limited | Agriculture & fishing | 2010 |
| Magnolia Health Advisors Limited | Health & social care | 2017 |
| Magtruck Ltd | Transport & logistics | 2018 |
| Malherbie Court (Management) Limited | Real estate | 1999 |
| Mango Property Management Limited | Real estate | 2015 |
| Manor Farm (Forton) Management Company Ltd | Households | 2021 |
| Manzana Ltd | Other services | 2019 |
| Maple Court Management (Taunton) Limited | Households | 2006 |
| Marc Green LP | | 2015 |
| Mark Pike Groundworks Ltd | Construction | 2012 |
| Marshalls 2011 LP | | 2012 |
| Martin Hounsell (Chard) Limited | Real estate | 1999 |
| Martin Lewis Electrical Ltd | Construction | 2019 |
| Marven Court (Uplyme) Management Limited | Households | 1974 |
| Matilda Therese Ltd | Real estate | 2026 |
| Matsisland Ltd | Wholesale & retail | 2023 |
| MAY Lane Surgery Limited | Construction | 1998 |
| Mcnabb Rougier & Co. Limited | Transport & logistics | 1962 |
| Meadow (Chard) Management Limited | Real estate | 2016 |
| Meatball Media Limited | Information & communication | 2024 |
| Medical Professional SW Limited | Health & social care | 2018 |
| Medieth Limited | Wholesale & retail | 2025 |
| MEL 2013 LP | | 2013 |
| Memtec CNC Ltd | Manufacturing | 2017 |
| Metalwise Southwest Limited | Manufacturing | 2009 |
| MG Quartley Ltd | Transport & logistics | 2021 |
| Miammo Ltd | Wholesale & retail | 2025 |
| Mike Egan Process Controls Limited | Professional & scientific | 2012 |
| Mike Williams Medical Ltd | Health & social care | 2025 |
| Millbrook Court (South Petherton) Management Company Limited | Real estate | 2010 |
| Millfield Precision Engineering Limited | Other services | 2016 |
| Millie's Boutique Limited | Wholesale & retail | 2026 |
| Milltec Limited | Manufacturing | 2025 |
| Minehead Medical Limited | Health & social care | 2022 |
| Mjlrentals Ltd | Real estate | 2025 |
| Morrison Construction SW Ltd | Construction | 2026 |
| Mortgage Sense (SW) Limited | Financial services | 2018 |
| MR & MRS Whirly Ice-Cream Limited | Wholesale & retail | 2009 |
| MR R J Porter Limited | Health & social care | 2013 |
| MS4 Engineering Ltd | Professional & scientific | 2024 |
| MT Management Limited | Administrative & support | 2025 |
| Munir Consultancy Ltd | Professional & scientific | 2025 |
| My Website Builder Ltd | Information & communication | 2017 |
| Myelin Consulting Ltd | Health & social care | 2021 |
| Nags and Nails Limited | Professional & scientific | 2014 |
| Nanasco Limited | Construction | 2024 |
| National Notes Ltd | Wholesale & retail | 2023 |
| Natural Energy Renewables Limited | Professional & scientific | 2009 |
| Navarro 2013 LP | | 2013 |
| Neroche Consultants Ltd | Professional & scientific | 2020 |
| Newton Medical Services Limited | Health & social care | 2024 |
| Nexus Neurology Ltd | Health & social care | 2022 |
| Nicholas Davis Limited | Information & communication | 2011 |
| Nigel Marven Productions Limited | Information & communication | 2018 |
| Nightingale Court (Taunton) Management Company Limited | Households | 2000 |
| NJA Flooring (South West) Limited | Construction | 2025 |
| NK. 2015. LP | | 2016 |
| NO1 Gear LP | | 2006 |
| NS.2015. LP | | 2012 |
| Nurturing Somerset Together Limited | Public administration | 2025 |
| Nutopic Limited | Manufacturing | 2025 |
| Oak Escape Lodges Ltd | Hospitality | 2020 |
| Ocean Grace Ltd | Real estate | 2022 |
| Ogilvie Medical Limited | Health & social care | 2025 |
| Oktawia's QA Ltd | Information & communication | 2021 |
| Old Castle Properties Ltd | Real estate | 2026 |
| Openshare Residents Management Limited | Households | 1988 |
| Optimi Energy Ltd | Construction | 2025 |
| Orbit Graphic Limited | Professional & scientific | 2003 |
| Orbitive Ltd | Information & communication | 2025 |
| Orchard Court (Stoford) Management Company Limited | Households | 1997 |
| Orchard Osteopaths Ltd | Health & social care | 2022 |
| Organic Herbal Remedies Ltd | Wholesale & retail | 2008 |
| Orian Group Ltd | Health & social care | 2021 |
| OT Small Consulting Ltd | Information & communication | 2024 |
| P Carruthers Radiology Limited | Health & social care | 2021 |
| Panda Care Sourcer Ltd | Administrative & support | 2026 |
| Panda Talent Bridge Recruitment Ltd | Administrative & support | 2024 |
| Panda's Indian Kitchen Ltd | Wholesale & retail | 2024 |
| Panda's Newsagent & Convenience Store Limited | Wholesale & retail | 2025 |
| Paws UP Ltd | Other services | 2020 |