| K.G. Mccoll and Company Limited | Manufacturing | 1973 |
| Kahala Care Limited | Health & social care | 2017 |
| Kamolen Plant Ltd | Administrative & support | 2018 |
| Kate Emily MAY Ltd | Wholesale & retail | 2026 |
| Kazlum Support Ltd. | Health & social care | 2008 |
| KB Software Ltd | Information & communication | 2014 |
| Kdod UK Ltd | Financial services | 2025 |
| Kelland Dairy Limited | Agriculture & fishing | 2003 |
| Kelsieskitchen Ltd | Manufacturing | 2019 |
| Kemp Digital Ltd | Information & communication | 2018 |
| KEN Gunn Consulting Limited | Professional & scientific | 2019 |
| Kenvin Limited | Agriculture & fishing | 2002 |
| Kernow CAD Limited | Professional & scientific | 2012 |
| Kevin J Richards Road Transport Services Limited | Transport & logistics | 2012 |
| Kewilljoe Ltd | Professional & scientific | 2016 |
| Khift Ltd | Professional & scientific | 2021 |
| KIM R Voysey Limited | Health & social care | 2002 |
| Kina Coffee Limited | Wholesale & retail | 2023 |
| Kind Oils Skincare Ltd | Wholesale & retail | 2023 |
| King William House Residents Association Limited | Households | 1972 |
| Kingstones Holdings Ltd | Financial services | 2024 |
| Kinn Club Ltd | Administrative & support | 2026 |
| Kirton Advanced Automotive Ltd | Wholesale & retail | 2022 |
| Kirton Air Conditioning Limited | Manufacturing | 2025 |
| Kirton Food and Drink Ltd | Wholesale & retail | 2025 |
| Kirton Kayaks Limited | Manufacturing | 1975 |
| Kirton Limited | Professional & scientific | 2024 |
| Kixto Limited | Transport & logistics | 2015 |
| Kneller & Sons Ltd | Agriculture & fishing | 2025 |
| Knights AMC Limited | Professional & scientific | 2017 |
| Knowle Court Property Management Limited | Households | 2010 |
| Kohchi Co. Ltd | Professional & scientific | 2025 |
| Kream Motor Recruitment (Isca) Limited | Administrative & support | 2006 |
| Kullur TV Limited | Information & communication | 2012 |
| LA & LM Ltd | Real estate | 2024 |
| Laddertop BOO Limited | Financial services | 2025 |
| Ladds Guns Ltd | Wholesale & retail | 2008 |
| Lamb Hospitality Limited | Hospitality | 2018 |
| LAN Auto Services Ltd | Wholesale & retail | 2021 |
| Lander Civils&Groundworks Ltd | Construction | 2024 |
| Langmead Farms (Devon) Limited | Agriculture & fishing | 2004 |
| Lapford Allotments Limited | Extraterritorial | 2017 |
| Lapford Lodge Boarding Kennels Ltd | Other services | 2021 |
| Larter Project Services Ltd | Professional & scientific | 2026 |
| Laujor Ltd | Wholesale & retail | 2014 |
| Lavender IT Ltd | Information & communication | 2023 |
| LD Hanks Ltd | Hospitality | 2020 |
| Leaf Culture Ltd | Wholesale & retail | 2022 |
| Lean Marketing & Digital Services Ltd | Administrative & support | 2015 |
| Lee's Stores Limited | Information & communication | 2021 |
| Leisure Life SW Ltd | Wholesale & retail | 2022 |
| Lench Farms Ltd | Wholesale & retail | 2020 |
| Leoseb Ltd | Construction | 2014 |
| Leroy (Exeter) Ltd. | Other services | 2000 |
| Leroy Funeral Service M Wreford & Sons Limited Liability Partnership | | 2012 |
| LES Wills Ltd | Transport & logistics | 2007 |
| Levante Futures Limited | Financial services | 2023 |
| Lewis Davey Professional Services Ltd | Wholesale & retail | 2016 |
| Lewis's of Crediton Limited | Wholesale & retail | 2018 |
| Libertyvp Ltd | Professional & scientific | 2020 |
| Lifton Automotive Limited | Wholesale & retail | 2026 |
| Lily Lace Floral Limited | Wholesale & retail | 2024 |
| Limers Cleave Ltd | Hospitality | 2020 |
| Limpet Films Ltd | Information & communication | 2022 |
| Linden Holdings (Devon) Ltd | Transport & logistics | 2017 |
| Linden Tree Developments Limited | Construction | 2014 |
| Linhay Homes Limited | Construction | 2006 |
| Link Support Exeter Ltd | Health & social care | 2018 |
| Lintera Ltd | Professional & scientific | 2026 |
| Listed Buildings Devon Ltd. | Construction | 2016 |
| Little Emlett Orchard Ltd | Manufacturing | 2024 |
| Little Oak Group Limited | Financial services | 2025 |
| Little South Africa Ltd | Manufacturing | 2015 |
| LIZ Hocking Limited | Information & communication | 2012 |
| Loatmead Dairy Farming Limited | Agriculture & fishing | 2001 |
| Logical Branches Ltd | Information & communication | 2022 |
| Logidrive Solutions Ltd | Administrative & support | 2025 |
| Longay Investments Ltd | Financial services | 2018 |
| Love Learning Tutors Ltd | Education | 2018 |
| Loveguard Limited | Administrative & support | 2022 |
| Lowe and Bespoke Ltd | Manufacturing | 2017 |
| Lower Filleigh Limited | Agriculture & fishing | 2003 |
| Lowmoor Carbreakers Limited | Wholesale & retail | 2013 |
| LT Swain Plumbing & Heating Limited | Construction | 2023 |
| Lubina Holdings Ltd | Hospitality | 2021 |
| Lucy Maltby Property Limited | Real estate | 2021 |
| Lumpy Lemon Limited | Administrative & support | 2007 |
| Lusland Ltd | Construction | 2015 |
| Luxton Property Services Limited | Construction | 2025 |
| Lynch Farms Limited | Agriculture & fishing | 2004 |
| Lynx House Limited | Real estate | 2001 |
| M & H Grigg Limited | Construction | 2014 |
| M & T Agri Ltd | Agriculture & fishing | 2023 |
| M C Kelly Limited | Wholesale & retail | 1990 |
| M Heywood Limited | Construction | 2013 |
| M J Bragg and SON Limited | Agriculture & fishing | 2002 |
| M J Chiverton Building Contractors LLP | | 2010 |
| M J Mcmath Limited | Real estate | 2006 |
| M J Tucker Plumbing Limited | Construction | 2014 |
| M R Horn & Partners LLP | | 2008 |