| Heritage Coast Fishing Ltd | Agriculture & fishing | 2024 |
| Herons LEA Residential Home Limited | Health & social care | 2002 |
| HH Investing Ltd | Real estate | 2025 |
| Hiax Preservation Ltd | Construction | 2015 |
| Hicks Logistics Holdings Ltd | Extraterritorial | 2018 |
| Hicks Logistics Ltd | Transport & logistics | 2001 |
| High Degree Limited | Information & communication | 2022 |
| High Park Barns LLP | | 2014 |
| Highborough House Management Company Limited | Households | 2000 |
| Highford Farm Management Company Limited | Real estate | 2001 |
| Highward Land Management Limited | Construction | 2026 |
| Hilltex Limited | Financial services | 2020 |
| Himalayan Garden Ltd | Hospitality | 2025 |
| Hipoteca Limited | Financial services | 2024 |
| Hiron & Sons Ltd | Wholesale & retail | 2022 |
| HK Bideford Limited | Hospitality | 2024 |
| HO! Gifts Limited | Wholesale & retail | 2014 |
| HO! Coastal Lets Ltd | Real estate | 2026 |
| HO! Fix-It Ltd | Construction | 2025 |
| Holiday Changeovers Limited | Hospitality | 2018 |
| Holiday Home Hub Ltd | Administrative & support | 2017 |
| Holiday Homes Laundry Services Limited | Administrative & support | 2026 |
| Holiday LET Expert Ltd | Hospitality | 2018 |
| Holistic Therapies Training Academy Ltd | Education | 2019 |
| Hologreen Ltd | Professional & scientific | 2023 |
| Holts Jewellery Ltd | Wholesale & retail | 2022 |
| Home Design and Build Limited | Construction | 2008 |
| Homelife - Real Life! Limited | Health & social care | 2017 |
| Hone Your English Limited | Education | 2025 |
| Horizon View Freehold Company Limited | Real estate | 2020 |
| Hornsbury Mill Hotel Ltd | Hospitality | 2024 |
| House 3 Kipling Terrace Property Limited | Extraterritorial | 2016 |
| House 7 Kipling Terrace Limited | Real estate | 2014 |
| House of Santon Maritime Ltd | Professional & scientific | 2014 |
| House Seven - Kipling Terrace RTM Company Limited | Households | 2003 |
| House SIX - Kipling Terrace RTM Company Limited | Real estate | 2003 |
| Hubinto Ltd. | Information & communication | 2015 |
| Hybrid Packaging Solutions Ltd | Manufacturing | 2025 |
| Hydroblast Pressure Washing Ltd | Administrative & support | 2025 |
| Hydrovue Limited | Professional & scientific | 2017 |
| Hyford Holiday Management Limited | Hospitality | 2025 |
| Hytte Living Ltd | Professional & scientific | 2021 |
| Hälsa Capital Ltd | Real estate | 2015 |
| I AM EAR Ltd | Health & social care | 2021 |
| I-Res SW Limited | Construction | 2024 |
| Ic-Yang Limited | Wholesale & retail | 2024 |
| Ideal Construction (South West) Limited | Construction | 2026 |
| Ideal Final Result Consultants Limited | Professional & scientific | 1997 |
| Illuminate Design Holdings Ltd | Financial services | 2023 |
| Illuminate Design Limited | Administrative & support | 2005 |
| Imaginary Space Ltd | Information & communication | 2019 |
| Improved Ways Limited | Professional & scientific | 2021 |
| Inclusis Limited | Health & social care | 2012 |
| Indulge at Westward HO Limited | Hospitality | 2022 |
| Infinite Horizon Computer Technology Limited | Financial services | 2000 |
| INNOV8COSMETICS Ltd | Professional & scientific | 2017 |
| Innovations in Dementia Community Interest Company | Health & social care | 2007 |
| Inspire Cleaning Group Ltd | Administrative & support | 2012 |
| Inspire Holiday Home Management Ltd | Extraterritorial | 2023 |
| Inspire Holidays Ltd | Hospitality | 2025 |
| Instow Trading Co Limited | Hospitality | 2021 |
| Inventive Marketing Solutions Limited | Professional & scientific | 2007 |
| Ipplepen Property Holdings Limited | Professional & scientific | 2004 |
| Ipplepen Property Limited | Wholesale & retail | 1993 |
| IRG Properties Ltd | Real estate | 2009 |
| Islington Play Company Limited | Education | 2025 |
| Isomats Ltd | Wholesale & retail | 2019 |
| Ixion Properties Limited | Real estate | 2017 |
| J & B Carpentry Services Limited | Construction | 2006 |
| J & B Cleaning Services (SW) Ltd | Administrative & support | 2015 |
| J & D Sparrey Limited | Construction | 2011 |
| J a Lynd Ltd | Health & social care | 2013 |
| J and S Fishing Limited | Agriculture & fishing | 2011 |
| J Art Design Studio Ltd | Construction | 2023 |
| J Barbers Bideford Ltd | Other services | 2023 |
| J Brayley Flooring Ltd | Construction | 2009 |
| J C Biellik Limited | Information & communication | 2015 |
| J D Commercial Property Limited | Real estate | 2011 |
| J F Home & Garden Ltd | Administrative & support | 2025 |
| J G Pratt Associates Limited | Professional & scientific | 2014 |
| J J Carpentry & Construction Ltd | Construction | 2026 |
| J M Becklake Limited | Agriculture & fishing | 2004 |
| J T Agricultural Services Ltd | Agriculture & fishing | 2020 |
| J T Evans & SON Limited | Transport & logistics | 2004 |
| J W YEO Construction Ltd | Other services | 2023 |
| J&L Pubs Ltd | Hospitality | 2024 |
| J. COX Commercial Services Ltd | Professional & scientific | 2013 |
| Jacks Building & Property Services Ltd | Construction | 2022 |
| Jadesjewels Ltd | Manufacturing | 2026 |
| Jalapeño Warmwear Ltd | Wholesale & retail | 2021 |
| Jam-Av Ltd | Arts & recreation | 2022 |
| James Properties South West Limited | Real estate | 2009 |
| Jamesjadams Ltd | Professional & scientific | 2021 |
| Jamestan Holdings Limited | Manufacturing | 2006 |
| JAN Wright Bookkeeping Limited | Professional & scientific | 2015 |
| Jane Maynard Limited | Professional & scientific | 2003 |
| JB Locations Ltd | Administrative & support | 2015 |
| JBC Towing Limited | Wholesale & retail | 2023 |
| Jcrook CAD Limited | Construction | 2005 |
| JD Building & Groundworks Ltd | Construction | 2013 |