| G.J. Harding-Crook Electrical Services Ltd | Construction | 2015 |
| Galloping Bottom LLP | | 2005 |
| GB Engineering Limited | Other services | 2003 |
| Giger Express Ltd | Transport & logistics | 2019 |
| GL96 Ltd | Financial services | 2025 |
| Glencare Homes Ltd | Health & social care | 2006 |
| Gold Star Exmoor Limited | Professional & scientific | 2024 |
| Goldcoast (UK) Limited | Arts & recreation | 2009 |
| Goosemoor Farming Limited | Agriculture & fishing | 2017 |
| Grayareas Limited | Health & social care | 2002 |
| Grenville Close Management Company Limited | Real estate | 2014 |
| GRK Management Consulting Ltd | Professional & scientific | 2026 |
| GRT Countryside Care Limited | Construction | 2014 |
| GS Haydon & SON Limited | Manufacturing | 2002 |
| GSH Holdings SW Limited | Real estate | 2024 |
| Gym Active Ltd | Arts & recreation | 2018 |
| H N Blackmore & Sons Funeral Directors Limited | Other services | 2024 |
| H.A.Welch (Yelland) Limited | Agriculture & fishing | 1944 |
| Habitual Fit Ltd | Arts & recreation | 2023 |
| Hadley Care Limited | Health & social care | 2006 |
| Hanlab Limited | Agriculture & fishing | 2016 |
| Harvest Green Contracting Ltd | Professional & scientific | 2025 |
| Hayes Garden Machinery Limited | Wholesale & retail | 2016 |
| Healthcare Plaza (UK & Ireland) Limited | Wholesale & retail | 2025 |
| Hexan Property Holdings | | 2009 |
| Hgm&E Contractors Ltd | Professional & scientific | 2023 |
| Higher Bickingcott LLP | | 2017 |
| Higher Week Treatment Plant Limited | Households | 2024 |
| Highfield IT Consultancy Ltd | Information & communication | 2010 |
| Highfield Pension Ltd | Financial services | 2011 |
| Hiscocks Building Contractor Ltd | Construction | 2003 |
| HMB Partners LLP | | 2006 |
| Holiday Centres Association Limited | Other services | 1936 |
| Homewood Financial Limited | Agriculture & fishing | 2009 |
| Honey & Daughter Limited | Manufacturing | 2015 |
| Honeyday Limited | | 1991 |
| Honkie Dorda Limited | Hospitality | 2020 |
| IGS Developments Limited | Construction | 2015 |
| IJW Machinery Ltd | Wholesale & retail | 2021 |
| IN the Lions Lair Ltd | Information & communication | 2020 |
| Instow Arms Limited | Hospitality | 2012 |
| Irishcombe Farms Limited | Agriculture & fishing | 2026 |
| Istanbul Kitchen Ltd | Hospitality | 2026 |
| J & N Storage Limited | Hospitality | 2017 |
| J Hayes Group Limited | Manufacturing | 2010 |
| J. Penfold Tarmacadum Contractors Limited | Construction | 2003 |
| Jenkins Accountants Ltd | Professional & scientific | 2019 |
| JF Joinery (SW) Limited | Manufacturing | 2013 |
| JF Joinery Property Limited | Construction | 2014 |
| JFJ Wood Flooring Limited | Manufacturing | 2013 |
| JGP Holdings Limited | Health & social care | 2022 |
| JMS Carter Holdings Limited | Financial services | 2024 |
| Joenglish Limited | Education | 2021 |
| John Lock Construction Limited | Construction | 2003 |
| John Walker Insurance Limited | Financial services | 2007 |
| Joshua Cottam Farriery Limited | Agriculture & fishing | 2018 |
| Jslc Property Ltd | Real estate | 2026 |
| Katherineknight Ltd | Real estate | 2026 |
| KDD Ltd | Financial services | 2025 |
| Kerscott Ltd | Hospitality | 2023 |
| KFS Consultancy Limited | Real estate | 2004 |
| KSM Services (SW) Ltd | Manufacturing | 2026 |
| Ky's Travels Ltd | Administrative & support | 2026 |
| L & R Farms Limited | Real estate | 2015 |
| L&M Berry Holdings Limited | Financial services | 2024 |
| L-S Transport Ltd | Transport & logistics | 2024 |
| Landsense Professional Limited | Real estate | 2005 |
| Lang Holdings (Devon) Limited | Hospitality | 2006 |
| Lazarus Veterinary Specialists Ltd | Professional & scientific | 2021 |
| Leisure Furniture Direct Ltd | Wholesale & retail | 2016 |
| Libbaton Management Company Limited | Households | 1991 |
| Lifevac Europe Ltd | Manufacturing | 2014 |
| Little Gems Community Toddler Group CIC | Health & social care | 2025 |
| Livabl Limited | Construction | 2020 |
| Lloyd Agnew Property Ltd | Construction | 2020 |
| Long Black Coat Ltd | Information & communication | 2009 |
| Loyton Holdings Limited | Hospitality | 2018 |
| Loyton LLP | | 2003 |
| Loyton Retail LLP | | 2003 |
| LSK Fitness Ltd | Arts & recreation | 2022 |
| M & B Plant (Devon) Limited | Administrative & support | 2001 |
| M a Caddy Developments Ltd | Construction | 2011 |
| M a Caddy Properties Ltd | Real estate | 2017 |
| M B Commercials Repairs Ltd | Wholesale & retail | 2017 |
| M J Tearall Fencing Solutions LLP | | 2021 |
| M Way Holdings Limited | Financial services | 2016 |
| M&J Waste Management Ltd | Water & waste | 2021 |
| M.C. Ayre Limited | Construction | 2003 |
| Mafeel Limited | Construction | 2016 |
| Magnolia Management Limited | Real estate | 1996 |
| Malins FX Ltd | Professional & scientific | 2019 |
| Manix Green Developments Ltd | Construction | 2018 |
| Mardon Finance Limited | Financial services | 2009 |
| Mardon Recycling Machinery Limited | Wholesale & retail | 2003 |
| Mardon Rentals Limited | Administrative & support | 2010 |
| Mardon Waste Management Limited | Extraterritorial | 2008 |
| Mark Berry Plumbing & Heating Limited | Construction | 2008 |
| Marsh Lane Servicing (South Molton) Limited | Manufacturing | 2022 |
| Matthew Tapp Design Ltd | Information & communication | 2022 |
| Mavencrest Ltd | Professional & scientific | 2024 |