| L.H Diving Ltd | Construction | 2024 |
| Labmedics Ltd | Professional & scientific | 2013 |
| Lakeman Limited | Real estate | 2019 |
| Lark House Management Company Limited | Households | 2005 |
| Lars & Margo Ltd | Manufacturing | 2023 |
| Little Quay Nursery and Learning Hub Ltd | Education | 2025 |
| Little Sailors Nursery Ltd | Health & social care | 2025 |
| Long Arrow Motorcycles Ltd | Wholesale & retail | 2020 |
| Louis LE Poidevin Ltd | Professional & scientific | 2020 |
| Love Your Voice Therapy and Training CIC | Health & social care | 2022 |
| Lucy's Kitchen Cornwall Ltd | Hospitality | 2025 |
| Lwshepherd Property Management Ltd | Real estate | 2024 |
| Lynher CIC | Transport & logistics | 2016 |
| Madame DE Brow Ltd | Wholesale & retail | 2022 |
| Maker Barns Management Company Ltd | Households | 2020 |
| Maker Heights Ltd | Other services | 2021 |
| Maker Motors Limited | Wholesale & retail | 2019 |
| Marc's Plaice Limited | Wholesale & retail | 2025 |
| Marcs Seafood Limited | Agriculture & fishing | 2025 |
| Marine Court (Torpoint) Limited | Households | 1991 |
| Marisure Ltd | Information & communication | 2011 |
| Marjorie Creek Consultancy Services Ltd | Administrative & support | 2023 |
| Matt Keeble Photography Ltd | Professional & scientific | 1999 |
| Mega-Quartz UK Ltd | Manufacturing | 2003 |
| Mendennick Farm Camping Ltd | Hospitality | 2021 |
| Method Engine Limited | Professional & scientific | 2023 |
| Millbrook Court Management Company Limited | Professional & scientific | 2002 |
| Millbrook Meridian Limited | Other services | 2019 |
| Miller Development (UK) Limited | Construction | 2003 |
| Minchella Bros Ltd | Wholesale & retail | 2021 |
| Miss IVY Events Ltd | Other services | 2013 |
| Mist Merchants Limited | Wholesale & retail | 2025 |
| MND Construction Ltd | Construction | 2025 |
| Monika BAL Ltd | Real estate | 2025 |
| Monkey Puzzle Genealogical Research Ltd | Professional & scientific | 2024 |
| MOR Ltd | Manufacturing | 2018 |
| Mother's Ruin 1751 Distilling Company Ltd | Extraterritorial | 2018 |
| Mount Brioni Cleaning Services Limited | Administrative & support | 2026 |
| Mount Brioni Lettings Limited | Real estate | 2003 |
| Mount Brioni Property Services Limited | Hospitality | 2003 |
| Mount Edgcumbe Railway & Model Society Ltd | Arts & recreation | 2025 |
| Multinational Mentoring Limited | Education | 2023 |
| Mychosen Supplies Limited | Wholesale & retail | 2022 |
| Naylor's Property Maintenance Limited | Construction | 2022 |
| Neotropical Primate Conservation | Professional & scientific | 2007 |
| Newman Haulage Limited | Transport & logistics | 2010 |
| Nexus Interface Solutions Europe Limited | Manufacturing | 2004 |
| Nicola Skorko Coaching Ltd | Information & communication | 2015 |
| Northern Rail Route CIC | Transport & logistics | 2020 |
| Notman & Taylor Limited | Real estate | 2024 |
| Ocean Axis CIC | Education | 2025 |
| Ocean City Cards Ltd | Wholesale & retail | 2021 |
| Ocean First Marine Ltd | Wholesale & retail | 2015 |
| Oceanview Seaton Limited | Hospitality | 2022 |
| Olive's (the Cleave) Ltd | Hospitality | 2026 |
| One Breath From Death Ltd | Wholesale & retail | 2024 |
| Parallaxsys Ltd | Information & communication | 2026 |
| Patchwork Studios CIC | Information & communication | 2018 |
| Pearce Enterprise Holdings Ltd | Financial services | 2024 |
| Pendanic Limited | | 1984 |
| Peninsula Community Projects Ltd | Construction | 2022 |
| Perryn&S Ltd | Hospitality | 2021 |
| Peter Cade Photography Limited | Professional & scientific | 2014 |
| Phantom Vehicle Body Repair & Refinishing Ltd | Wholesale & retail | 2022 |
| Pigshill & Clarrick Woods Community Interest Company | Agriculture & fishing | 2013 |
| Plankton Id-Ology Ltd | Professional & scientific | 2024 |
| Point Europa Ltd | Other services | 2004 |
| Polarity Engineering Ltd | Professional & scientific | 2011 |
| Polbathic Cider Ltd | Manufacturing | 2025 |
| Polbathic Hand Car Wash Limited | Administrative & support | 2022 |
| PR Matters Ltd | Administrative & support | 2014 |
| Precision Labs Ltd | Wholesale & retail | 2026 |
| Prescott Property Limited | Real estate | 2025 |
| Print Options (S.W.) Limited | Manufacturing | 1992 |
| Purple Dog Solutions Ltd | Administrative & support | 2013 |
| R & S Harris Cawsand Ltd | Real estate | 2009 |
| R B Windows South West Limited | Manufacturing | 2004 |
| R W Carter Limited | Construction | 2017 |
| Railwave Ltd | Construction | 2025 |
| Raleigh Enterprises Shop CIC | Wholesale & retail | 2020 |
| Rame Conservation Trust | Other services | 1997 |
| Rame Electrics Ltd | Construction | 2025 |
| Rame Hydrographic Services Limited | Professional & scientific | 2013 |
| Rame Library of Things CIC | Administrative & support | 2025 |
| Rame Medical Limited | Health & social care | 2014 |
| Rame Outdoors CIC | Education | 2009 |
| Rapidfix Appliances Ltd | Other services | 2025 |
| Regal (SW) Limited | Real estate | 2014 |
| Resilience Communications Limited | Information & communication | 2004 |
| Resilience Systems Limited | Professional & scientific | 2006 |
| Retreat Cornwall Ltd | Hospitality | 2023 |
| Rfor Properties Ltd | Hospitality | 2021 |
| RG Pools & Leisure Ltd | Construction | 2012 |
| RG Seafoods Ltd | Manufacturing | 2020 |
| RH Worx Limited | Agriculture & fishing | 2021 |
| Rhht (SW) Ltd | Real estate | 2019 |
| Rock House Management Company Limited | Real estate | 2005 |
| Rockhopper Letting Ltd | Real estate | 2020 |
| Roseacre Care Limited | Health & social care | 2002 |
| Roseaton Limited | Financial services | 2003 |