| Heartwood Homes Limited | Real estate | 2013 |
| Heat Pumps South West Limited | Construction | 2008 |
| HI3 Services Ltd | Wholesale & retail | 2023 |
| Highbridge Consultancy Ltd | Information & communication | 2026 |
| Higher Alsworthy Farm Limited | Hospitality | 2015 |
| Hirst Construction Limited | Construction | 2000 |
| Hirst Environmental Services Ltd | Water & waste | 2010 |
| HLC Holsworthy Travel Limited | Administrative & support | 2005 |
| HOL5 Management Company Limited | Administrative & support | 2007 |
| Hole Farm Leisure Limited | Real estate | 2015 |
| Holistic Engineering Dynamics Limited | Professional & scientific | 2023 |
| Holsworthy Computers Ltd | Other services | 2019 |
| Holsworthy Food Projects CIC | Hospitality | 2023 |
| Holsworthy Memorial Hall Limited | Administrative & support | 2005 |
| Holsworthy Rural Community Transport Ltd | Health & social care | 2004 |
| Homeclean Somerset and Bristol Limited | Other services | 2016 |
| Horseboarding UK Ltd | Arts & recreation | 2013 |
| Horticultural Correspondence College Limited | Education | 1997 |
| Horticultural Training College Limited | Education | 1999 |
| Hysmark Ltd | Construction | 2005 |
| I-Price Ltd | Professional & scientific | 2024 |
| Ignite South West Ltd | Construction | 2024 |
| Infrablock Limited | Real estate | 1998 |
| Inkpen Accounting Services Limited | Professional & scientific | 2011 |
| Insite Engineering & Surveying Ltd | Construction | 2025 |
| Ironside Motors Limited | Wholesale & retail | 1967 |
| J & J Chapman LLP | | 2024 |
| J & M Britton Ltd | Agriculture & fishing | 2001 |
| J G Nicholls Limited | Professional & scientific | 2020 |
| J T Auto (UK) Ltd | Wholesale & retail | 2013 |
| J.E. Stacey & Co. (Holdings) Limited | Construction | 2018 |
| Jackhammer Builders Limited | Construction | 2019 |
| JAG Signs Limited | Manufacturing | 2010 |
| Jaxsam Ltd | Hospitality | 2019 |
| JDM Garage Parts Limited | Wholesale & retail | 2012 |
| Jenns Farm Ltd | Agriculture & fishing | 2023 |
| JO Carlin Ltd | Agriculture & fishing | 2019 |
| JO GUY Fencing Ltd | Administrative & support | 2023 |
| JO Waite Consultancy Ltd | Health & social care | 2023 |
| JPT Developments Ltd | Construction | 2013 |
| JRD Plumbing & Heating Ltd | Construction | 2023 |
| JT Accountancy Ltd | Professional & scientific | 2015 |
| Justine's Kitchen Ltd | Hospitality | 2024 |
| Kaei Ltd | Construction | 2015 |
| Karen Clarke Digital Ltd | Professional & scientific | 2024 |
| Kate Richardson Ltd | Professional & scientific | 2014 |
| Keith Taylor Driving Tuition Ltd | Education | 2024 |
| Kenwyn Stove & Chimney Company Limited | Extraterritorial | 2002 |
| KEV Johns Agricultural and Plant Contractors Limited | Agriculture & fishing | 2012 |
| Kingsley Garden Centre Ltd | Wholesale & retail | 2018 |
| KTM Machinery Limited | Wholesale & retail | 2013 |
| Lakhpur Limited | Real estate | 2011 |
| Lark Weddings Ltd | Other services | 2020 |
| Larkstone Livestock Services Ltd | Professional & scientific | 2025 |
| LC Holsworthy Limited | Wholesale & retail | 2022 |
| Leading for Children Ltd | Professional & scientific | 2022 |
| LG Construction (SW) Ltd | Construction | 2024 |
| LI HAO Garden Ltd | Hospitality | 2022 |
| Liam Jones Installations Ltd | Manufacturing | 2026 |
| Lifes Adventure Overland Ltd | Manufacturing | 2026 |
| Lightoaks Biomass Limited | Wholesale & retail | 2022 |
| LRF Support Limited | Professional & scientific | 2004 |
| Lufflands Caravan Sales & Services Ltd | Wholesale & retail | 2018 |
| Luke Furse Earthmoving Limited | Construction | 2001 |
| Luxury Lifestyle Products Limited | Wholesale & retail | 2021 |
| M & M Partners Ltd | Professional & scientific | 2014 |
| M&R Home Improvements Ltd | Construction | 2019 |
| M.L.Stokes & Sons Ltd | Arts & recreation | 2015 |
| Machin Design Services Limited | Professional & scientific | 2012 |
| Mamba Spaces Ltd | Real estate | 2025 |
| MAN Down Cornwall CIC | Health & social care | 2019 |
| Manch 1 Ltd | Real estate | 2020 |
| Manch 2 Ltd | Real estate | 2020 |
| Manch 3 Ltd | Real estate | 2020 |
| Manimala Enterprises LLP | | 2010 |
| Manor Gardens (Holsworthy) Management Company Limited | Households | 2016 |
| Mark Anthony Pickard Limited | Administrative & support | 2004 |
| Mark Broadhead Limited | Construction | 2006 |
| Marlborough Events Limited | Hospitality | 2014 |
| Marley Combe Technical Services Ltd | Agriculture & fishing | 2017 |
| Marwood Commerce Limited | Wholesale & retail | 2014 |
| Maxinca Limited | Real estate | 2021 |
| Mayflower Acquisition Finance Ltd | Professional & scientific | 2026 |
| Medland Developments Ltd | Construction | 2018 |
| Mental Health Skills Training Limited | Education | 2013 |
| Merchant Youldon Limited | Agriculture & fishing | 2008 |
| Merrijohn Ltd | Agriculture & fishing | 2005 |
| Metocean Ltd | Professional & scientific | 2014 |
| Metrax Engineering Ltd | Manufacturing | 2010 |
| Middleton Commercial Ltd | Hospitality | 2017 |
| Millman Contractors Limited | Agriculture & fishing | 2021 |
| Mills Electrical Services Ltd. | Construction | 2015 |
| Milton Town Treatment Works Limited | Water & waste | 2004 |
| Mister Minstrel Group Ltd | Professional & scientific | 2025 |
| MLG Lettings Ltd | Real estate | 2024 |
| Monks Farm Country Stays Ltd | Hospitality | 2026 |
| MOO Free Ltd | Manufacturing | 2010 |
| Moor View Farm Limited | Agriculture & fishing | 2008 |
| Moore's Furnishings Limited | Wholesale & retail | 2003 |
| Moores of Froxton Limited | Agriculture & fishing | 1967 |