| HF1FAMBR Ltd | Transport & logistics | 2023 |
| HF2FAMBR Ltd | Transport & logistics | 2023 |
| HFL Estates Ltd | Construction | 2024 |
| HI Orbit Limited | Information & communication | 2025 |
| Hiddenlogic Ltd | Other services | 2023 |
| High Access Conservation Ltd | Administrative & support | 2024 |
| High Heathercombe C.I.C. | Hospitality | 2001 |
| Highcliffe Homes Limited | Real estate | 2013 |
| Highcroft Park Management Company Limited | Administrative & support | 2015 |
| Higher Ashlands Management Company Limited | Households | 2002 |
| Higher Lampetho Farm LLP | | 2016 |
| Higher Lampetho Limited | Construction | 2016 |
| Higher Level Scaffolding (SW) Ltd | Construction | 2025 |
| Higher Nurture Limited | Health & social care | 2024 |
| Highmark Paving & Groundworks Ltd | Construction | 2023 |
| Highweek Car Repair Centre Limited | Manufacturing | 2020 |
| Hildon Devon Limited | Real estate | 2017 |
| Hill House Nursery Limited | Agriculture & fishing | 2011 |
| Hillbrow Property Company Limited | Construction | 1965 |
| Hillmode Systems Limited | Administrative & support | 2007 |
| Hillside Trusham Management Company Limited | Households | 2006 |
| Hippohq Ltd | Hospitality | 2023 |
| Hithertu Ltd | Information & communication | 2025 |
| HL Architecture Ltd | Professional & scientific | 2020 |
| HLN Holdings (Devon) Ltd | Extraterritorial | 2026 |
| HM Concepts Ltd | Construction | 2025 |
| HM Horizons Ltd | Financial services | 2025 |
| HNK Data Consulting Limited | Professional & scientific | 2019 |
| HNK Legal Limited | Administrative & support | 2019 |
| HNK Litigation Limited | Administrative & support | 2019 |
| Hobsons Plumbing and Mechanical Ltd | Professional & scientific | 2012 |
| Hodges Landscaping Services Ltd | Administrative & support | 2023 |
| Holdstock Consultancy Ltd | Health & social care | 2024 |
| Holiday Bookings Online Limited | Information & communication | 2005 |
| Holiday by the Sea Limited | Hospitality | 2022 |
| Holidaycomps Ltd | Arts & recreation | 2023 |
| Holistic Healing Spa Maroc Limited | Other services | 2026 |
| Holland and Gilt Private Staffing Ltd | Administrative & support | 2024 |
| Hollew Ltd | Wholesale & retail | 2023 |
| Holloway Developments Limited | Construction | 2025 |
| Holly Court Limited | Hospitality | 2005 |
| Holly Farm Property Ltd | Real estate | 2020 |
| Hollyborne Limited | Construction | 2004 |
| Holman & Co Limited | Construction | 2013 |
| Holman-Luck Research Limited | Professional & scientific | 2014 |
| Holme Lodge Limited | Administrative & support | 2013 |
| Holnova Limited | Hospitality | 2026 |
| Holwell (Communal Areas) Limited | Households | 2013 |
| Holwell Generator Ltd | Households | 2016 |
| Home Buy Angels Ltd | Real estate | 2019 |
| Home Develop Angels Ltd | Construction | 2022 |
| Home Energy Solutions Ltd | Construction | 2019 |
| Home Farm (Parke) Limited | Hospitality | 2012 |
| Home Farm Cafe Limited | Hospitality | 2021 |
| Home Naturally Limited | Professional & scientific | 2017 |
| Home-Start Teignbridge | Other services | 2012 |
| Homes by Design of Exmouth Ltd. | Construction | 2002 |
| Homeside Property Limited | Households | 2016 |
| Honey Let's Hide Ltd | Manufacturing | 2022 |
| Honeywill Vehicle Repairs Ltd | Wholesale & retail | 2014 |
| Hoom Investments Ltd | Real estate | 2021 |
| HOP Oils Limited | Extraterritorial | 2004 |
| Hope Holdings Property Limited | Financial services | 2026 |
| Hoppy Campers Ltd | Manufacturing | 2023 |
| Hopscotch Homes Limited | Real estate | 2018 |
| HORIZONS21 Ltd | Professional & scientific | 2012 |
| Horrocks Properties (SW) Limited | Real estate | 2022 |
| Horses 4 Life CIC | Agriculture & fishing | 2021 |
| Hoskings Court Management Company Limited | Households | 1992 |
| Hostly Ltd | Real estate | 2019 |
| Hotel EXE Limited | Extraterritorial | 2018 |
| Hotine Halfway Houses Limited | Real estate | 2025 |
| Hotline-Horizont Ltd | Manufacturing | 1969 |
| Hotmail Ltd | Construction | 2019 |
| Hotspot Property Ltd | Real estate | 2017 |
| Hottot Transport Limited | Transport & logistics | 1963 |
| Houghton Innovations Limited | Information & communication | 2010 |
| Houghton Training Associates Ltd | Education | 2025 |
| Houlahan Builders Ltd | Construction | 2026 |
| House of Skincare Ltd | Other services | 2020 |
| House Surveys Devon Limited | Professional & scientific | 2019 |
| Houseshare Devon Ltd | Real estate | 2015 |
| Houset Investments Ltd | Construction | 2023 |
| Housing Independent People | Health & social care | 2015 |
| Howton Barton Stoves Ltd | Construction | 2022 |
| HP Holdings (Devon) Limited | Wholesale & retail | 2021 |
| HPY Exeter Ltd | Arts & recreation | 2023 |
| HR Advise Ltd | Extraterritorial | 2022 |
| HSB Property Limited | Real estate | 2019 |
| Hub Hair Collective Limited | Other services | 2023 |
| HUB-4 Limited | Information & communication | 2011 |
| Hudson Exterior Cleaning Limited | Administrative & support | 2004 |
| Hudson Media Consulting Limited | Extraterritorial | 2016 |
| Hughes & Hoare Homes Limited | Real estate | 2024 |
| Hugo & Hudson Limited | Wholesale & retail | 2016 |
| Hulaholdings Limited | Financial services | 2021 |
| Hulatech Limited | Information & communication | 2016 |
| Hummer 4 U Limited | Transport & logistics | 2007 |
| Hunter's Brewery Ltd | Manufacturing | 2008 |
| Hurley Contractors Limited | Construction | 2009 |