| Kdks Properties Ltd | Construction | 2011 |
| Keltek Sports Ltd | Wholesale & retail | 2026 |
| Kendall Engineering Ltd | Manufacturing | 2016 |
| Kept Foods Limited | Manufacturing | 2019 |
| Kernow Chippy Ltd | Hospitality | 2025 |
| Kernow Garage Ltd | Wholesale & retail | 2018 |
| Kernow Holiday Home Sales Limited | Wholesale & retail | 2022 |
| Kerth Limited | Real estate | 2017 |
| Keskerdhes Ltd | Information & communication | 2023 |
| KEW Grenville Management Company Limited | Households | 2019 |
| Khmr Limited | Professional & scientific | 2011 |
| Kilkhampton MOT Station Ltd | Wholesale & retail | 2019 |
| Kilkhampton Pizza & Burgers Ltd | Hospitality | 2026 |
| Kilkhampton Wayside Limited | Hospitality | 2022 |
| Kitty's Herbery Ltd | Manufacturing | 2021 |
| Knocked OUT Ltd | Wholesale & retail | 2023 |
| Koden Digital Limited | Information & communication | 2023 |
| Kook Ensemble CIC | Arts & recreation | 2023 |
| Kooky Campervans Limited | Administrative & support | 2022 |
| Kross Rock Limited | Other services | 2021 |
| KS Architecture Ltd | Professional & scientific | 2024 |
| KSI Catering Limited | Hospitality | 2022 |
| L H Bude Limited | Wholesale & retail | 2018 |
| L Sampson Construction Ltd | Construction | 2011 |
| L&M Architects Ltd | Professional & scientific | 2024 |
| Langfield Gardens Management Ltd | Administrative & support | 2017 |
| Langford Consulting Limited | Construction | 2023 |
| Launceston Self Storage Ltd | Administrative & support | 2007 |
| Lavender Farm Shepherds Huts Ltd | Manufacturing | 2014 |
| LEE Bickle Accountancy Ltd | Professional & scientific | 2023 |
| LH Kench Ltd | Financial services | 2025 |
| Libra Baby Ltd | Wholesale & retail | 2023 |
| Lisa Wood Fitness Bude CIC | Health & social care | 2023 |
| Littlebridge Estates Ltd | Real estate | 2001 |
| LJD Coaching Limited | Education | 2023 |
| Lloyd Cartmell Ltd | Wholesale & retail | 2012 |
| Lock Gates Cafe Limited | Hospitality | 2022 |
| Lockpick Ltd | Wholesale & retail | 2019 |
| Locum Solutions Southwest Limited | Wholesale & retail | 2018 |
| Long Park Drive & Thorn Field Management Company Limited | Households | 2022 |
| Lorm Holdings Ltd | Financial services | 2023 |
| Louise Browne Project Management Ltd | Professional & scientific | 2024 |
| Loveband Property Holdings Ltd | Real estate | 2025 |
| LOW Pressure Limited | Information & communication | 2000 |
| Lowenek Limited | Construction | 2022 |
| Lucidity Innovation Ltd | Education | 2012 |
| Lunamedia Ltd | Information & communication | 2010 |
| Lutteridge Limited | Professional & scientific | 2024 |
| Luxury Dog Boarding Limited | Other services | 2013 |
| LXW Architects LLP | | 2024 |
| Lynstone Management Co. Limited | Administrative & support | 1997 |
| M & K Sampson Ltd | Manufacturing | 2014 |
| M B Systems Limited | Extraterritorial | 2001 |
| M G Trustees Ltd | Professional & scientific | 2000 |
| M J W Leasing Ltd | Financial services | 2020 |
| M.J Grigg Developments Ltd | Construction | 2025 |
| M.J Grigg Fencing Ltd | Construction | 2024 |
| MAC Plant Construction Limited | Construction | 1981 |
| Maer Lake (Bude) Management Company Limited | Hospitality | 1982 |
| Maer View (Bude) Management Company Limited | Households | 2022 |
| Manwise CIC | Health & social care | 2025 |
| Marc Mansfield Building Ltd | Construction | 2023 |
| Marc. Construction Ltd | Construction | 2019 |
| Markitmove Ltd | Information & communication | 2026 |
| Martian Engineering Limited | Manufacturing | 1997 |
| Maymyo Management Company Limited | Households | 2005 |
| Mcledgerne Limited | Real estate | 2019 |
| Meadowsweet Holidays Ltd | Hospitality | 2022 |
| Medicanna Ltd | Administrative & support | 2019 |
| MEL Bickle Glass & Ceramics Ltd | Manufacturing | 2024 |
| Memnon IT Ltd | Information & communication | 2013 |
| Menakoz Activities Ltd | Arts & recreation | 2021 |
| Mentality Group CIC | Education | 2023 |
| Menuvo Ltd | Information & communication | 2025 |
| Metters & Wellby Limited | Professional & scientific | 2013 |
| Michaela PAY Coaching Ltd | Administrative & support | 2022 |
| MLH Distribution Ltd | Wholesale & retail | 2026 |
| MO Samuels Enterprises Ltd | Information & communication | 2023 |
| Mobbs Electronic Repairs Limited | Other services | 2001 |
| Mollie's MEN Ltd | Construction | 2025 |
| Mora Studios Ltd | Administrative & support | 2023 |
| Moreton Pound Farm Ltd | Agriculture & fishing | 2012 |
| Morrison QP Services Ltd | Professional & scientific | 2015 |
| Morwenna Management Company Limited | Households | 2011 |
| Morwenna Park Management Company Ltd | Households | 2020 |
| Mozaic Limited | Information & communication | 1995 |
| MSH Limited | Professional & scientific | 2013 |
| Mucklow Holidays Ltd | Hospitality | 2019 |
| Mucky Nutz Ltd | Wholesale & retail | 2011 |
| Mulberry Court Exeter Ltd | Real estate | 2015 |
| Multistream Estates Ltd | Hospitality | 2020 |
| Multistream Leisure Ltd | Real estate | 2008 |
| Murphy Elite Limited | Hospitality | 2022 |
| Mvrk Marketing Ltd | Professional & scientific | 2020 |
| My T Shirt Printers Ltd | Manufacturing | 2020 |
| Mybudeful Limited | Extraterritorial | 2022 |
| N M Technical Services Limited | Manufacturing | 2018 |
| Natasha Jayne Greaves Limited | Health & social care | 2026 |
| Natcontent Ltd | Information & communication | 2025 |
| ND Evolutions Ltd | Arts & recreation | 2025 |