| Hideaway Beds Limited | Manufacturing | 1993 |
| High Voltage Power Services (SW) Eco Ltd | Administrative & support | 2022 |
| High-Tech Services Ltd | Construction | 2000 |
| Higher Horrells Investments Limited | Financial services | 2019 |
| Higher Park Lodge Limited | Health & social care | 1988 |
| Highlands Management Company (Yealmpton) Limited | Real estate | 2002 |
| Highly Interactive Limited | Information & communication | 2011 |
| Highr Solutions Limited | Professional & scientific | 2020 |
| Highwater Limited | Manufacturing | 2015 |
| Higman Close Management Company Limited | Households | 2019 |
| Hikmat Plymouth Limited | Hospitality | 2025 |
| Hillcrest Community Centre CIC | Other services | 2024 |
| Hillier Maintenance Southwest Limited | Administrative & support | 2011 |
| Hills Barbers Plymouth Ltd | Other services | 2018 |
| Hilltop Manor Management Company Limited | Households | 2002 |
| Himalayan Bkkp Limited | Real estate | 2019 |
| Himalayan Spice Plymouth Ltd | Hospitality | 2018 |
| Himmy Property Ltd | Real estate | 2024 |
| Hindhead Investments Limited | Financial services | 2012 |
| Hindhead Property Ltd | Real estate | 2015 |
| Hipwoods Garage Doors Ltd | Construction | 2014 |
| Hire Centre (South West) Limited | Administrative & support | 2013 |
| Hire Class Catering Services Ltd | Hospitality | 2018 |
| Hirst Accountancy Limited | Professional & scientific | 2007 |
| History Hotspots Ltd | Information & communication | 2019 |
| Hitchcock Holdings Limited | Financial services | 2018 |
| Hits-Uk Consultancy Limited | Extraterritorial | 2010 |
| Hive Construction Ltd | Construction | 2025 |
| Hivernest Capital Ltd | Real estate | 2019 |
| HJG Southwest Limited | Health & social care | 2023 |
| Hjkgroup Ltd | Manufacturing | 2021 |
| HJS Fire & Security Limited | Construction | 2020 |
| HMC ADV Ltd | Professional & scientific | 2020 |
| HMC Homes Ltd | Real estate | 2018 |
| HMF Transport Ltd | Transport & logistics | 2011 |
| HMH Property Management Limited | Real estate | 2019 |
| Hmpe Ltd | Extraterritorial | 2018 |
| Hmperopes Ltd | Extraterritorial | 2018 |
| Hmwca Limited | Professional & scientific | 2013 |
| HMZ Ventures Ltd | Hospitality | 2025 |
| HN Angela's Nails Ltd | Other services | 2025 |
| HNF Recruitment Ltd | Administrative & support | 2025 |
| HNS Properties Plymouth Ltd | Real estate | 2024 |
| Hoah Ltd | Administrative & support | 2019 |
| Hobbs and Lewis Ltd | Wholesale & retail | 2019 |
| Hobbs Chocolates Limited | Manufacturing | 2023 |
| Hobbs Home Builders Limited | Construction | 2021 |
| Hobby Horse Limited | Other services | 2001 |
| Hobz Limited | Wholesale & retail | 2021 |
| Hockedyhr Ltd | Administrative & support | 2025 |
| Hockley Mercantile Limited | Wholesale & retail | 2026 |
| Hodge Brothers Limited | Real estate | 2018 |
| HOE Court Limited | Households | 1975 |
| Hoegate Launderette Ltd | Other services | 2019 |
| Hoel Studios Ltd | Information & communication | 2026 |
| Hoffman Knight Charters Ltd | Administrative & support | 2016 |
| Hoggys Auto Body Shop Limited | Wholesale & retail | 2016 |
| Holbeton Dining Ltd | Hospitality | 2024 |
| Holbeton PUB Company Ltd | Hospitality | 2026 |
| Hold Fast Property Ventures Ltd | Construction | 2025 |
| Hold-Fast Radiator Valves Limited | Manufacturing | 1987 |
| Holdings EMB Limited | Professional & scientific | 2023 |
| Holiday Lets Plymouth Ltd | Real estate | 2025 |
| Holiday Park Developments Ltd | Hospitality | 2024 |
| Holidayhost Ltd | Administrative & support | 2020 |
| Holistic Housing Solutions Ltd | Professional & scientific | 2018 |
| Holistic Retrofit Solutions Ltd | Construction | 2023 |
| Holliss Limited | Administrative & support | 2024 |
| Hollister Electrical Services (SW) Ltd | Manufacturing | 2021 |
| Holly Down 2 LLP | | 2025 |
| Holly Down LLP | | 2010 |
| Holly UP Limited | Other services | 2014 |
| Holo Global Ltd | Professional & scientific | 2018 |
| Holyrood Place Management Company Limited | Real estate | 1983 |
| Holywell Bay FUN Park Limited | Arts & recreation | 1978 |
| Holywell Rigging Ltd | Mining & quarrying | 2018 |
| Home 2 Heart Removals Ltd | Transport & logistics | 2019 |
| Home Away Kitchen & Lounge Limited | Hospitality | 2025 |
| Home Boxes Limited | Extraterritorial | 2020 |
| Home Cargo Limited | Wholesale & retail | 2009 |
| Home Energy Solar & Insulation Ltd | Construction | 2026 |
| Home Improvements South West Limited | Construction | 2023 |
| Home Inspirations (SW) Limited | Construction | 2012 |
| Home Park Properties Ltd | Real estate | 2020 |
| Home Revival Interiors Ltd. | Wholesale & retail | 2016 |
| Home SW Ltd | Construction | 2021 |
| Home Sweet Homes Plymouth Ltd | Real estate | 2020 |
| Home-Start South and West Devon Ltd | Other services | 2005 |
| Homebase Limited | Extraterritorial | 2025 |
| Homeey Ltd | Wholesale & retail | 2024 |
| Homefield Road Property Management Ltd | Real estate | 2024 |
| Homeframe Ltd | Wholesale & retail | 2022 |
| Homefurb Ltd | Real estate | 2024 |
| Homeheat Plumbing Ltd | Construction | 2018 |
| Homemaker Southwest | Health & social care | 2001 |
| Homerads Ltd | Wholesale & retail | 2022 |
| Homers Bar Ltd | Hospitality | 2025 |
| Homes by Limited | Real estate | 2025 |
| Homesupply Retail Limited | Wholesale & retail | 2004 |
| Homeworthy Ltd | Information & communication | 2020 |