| Greenhouse Hospitality Ltd | Hospitality | 2022 |
| Greenwoods Property Group Limited | Real estate | 2021 |
| Gregland Court (Management) Limited | Households | 1975 |
| Griffin Artwork Limited | Arts & recreation | 2006 |
| Grigolo Limited | Wholesale & retail | 2016 |
| Ground Investigation Limited | Construction | 2007 |
| GSM Advisory Services Ltd | Professional & scientific | 2020 |
| GT Services (SW) Limited | Professional & scientific | 2014 |
| Guest Electrical Limited | Construction | 2020 |
| GV and RV Holdings Limited | Information & communication | 2009 |
| H and a Burgers Ltd | Hospitality | 2023 |
| H Pro Audio Ltd | Administrative & support | 2022 |
| H&Z Consultancy Ltd | Professional & scientific | 2023 |
| H20 Plumbing & Heating (South West) Limited | Construction | 2010 |
| Hallam House Management Limited | Professional & scientific | 1996 |
| Hallam Road Management Company Limited | Households | 2013 |
| Hambledon House Management Limited | Households | 1978 |
| Hampton House Clevedon Management Limited | Households | 1977 |
| Hanjella Investments Limited | Real estate | 1963 |
| Hanover Pictures Ltd | Information & communication | 2016 |
| Harbour Family (Properties) Limited | Real estate | 2017 |
| Hardstuck Limited | Information & communication | 2022 |
| Hardwick Lodge Limited | Households | 2013 |
| Hardy Country Communications Limited | Information & communication | 2020 |
| Harley Partnership Limited | Extraterritorial | 1995 |
| Harleys Global Limited | Arts & recreation | 1983 |
| Harleys Partnership Limited | Financial services | 2022 |
| Harleys Productions Ltd | Information & communication | 2025 |
| Harper Construction Recruitment Limited | Administrative & support | 2006 |
| Harptree Media Ltd | Information & communication | 2014 |
| Harris Financial Planning Limited | Financial services | 2019 |
| Harris Sports Ltd | Wholesale & retail | 2012 |
| Harson Solutions Ltd | Manufacturing | 2024 |
| Harvey's Coffee Company Clevedon Ltd. | Hospitality | 2015 |
| Hauslink-Up Co Ltd | Real estate | 2021 |
| Hazel Grove (Henbury) Management Company Limited | Households | 2008 |
| HB4 Limited | Manufacturing | 2025 |
| HDH Property Ltd | Real estate | 2026 |
| Headstrong Hairdressing Limited | Other services | 2009 |
| Headwater Group Limited | Financial services | 2021 |
| Healthcare in Practice Limited | Professional & scientific | 2011 |
| Heatherdeane Property Limited | Real estate | 2019 |
| Hebden Sarnies Ltd | Extraterritorial | 2021 |
| Heelstone Hotels (Bridgwater) Limited | Construction | 2019 |
| Hellcats Holdings Ltd | Arts & recreation | 2021 |
| Hello Video Ltd | Information & communication | 2026 |
| Help ME 2 Retire Limited | Professional & scientific | 2026 |
| Helping Hands (SW) Limited | Other services | 2008 |
| Hendy Services Limited | Construction | 2006 |
| Herculean Industries Equipment Ltd | Administrative & support | 2025 |
| Heritage Property Maintenance Ltd | Construction | 2020 |
| Herons Mead (Newco) Limited | Hospitality | 2024 |
| HI Tide Clevedon Ltd | Wholesale & retail | 2023 |
| Hi-Rise Scaffolding Ltd | Construction | 2009 |
| Hicks Technical Consulting Ltd | Information & communication | 2011 |
| Highbridge Quay (Highbridge) Management Company Limited | Households | 2005 |
| Highcliffe Court Management Company Limited | Real estate | 1981 |
| Highcroft Heights Limited | Real estate | 2015 |
| Highdale Nursery Ltd | Education | 2007 |
| Hither Green Specialist Cars Ltd | Wholesale & retail | 2020 |
| Hixabyte Ltd | Information & communication | 2017 |
| HJB 1 Limited | Extraterritorial | 2016 |
| HJH Property Limited | Real estate | 2021 |
| HJM Autos Ltd | Wholesale & retail | 2022 |
| Hjsb Computing Limited | Information & communication | 2016 |
| Hobzie Limited | Arts & recreation | 1996 |
| Hoddell Associates Limited | Professional & scientific | 1996 |
| Holdland House Management Limited | Households | 2013 |
| Holdshare Management Services Limited | Real estate | 1988 |
| Holdshare Secretarial Services Limited | Households | 1986 |
| Holland Assets Ltd | Real estate | 2023 |
| Holmes Systems & Strategy Ltd | Wholesale & retail | 2026 |
| Holmesdale Flat Management Company Limited | Households | 1987 |
| Home Alone Pet Care Ltd | Other services | 2023 |
| Homeground Design & Build Limited | Construction | 2013 |
| Homeleaze Build Ltd | Construction | 2013 |
| Homes by Twenty Two Ltd | Real estate | 2022 |
| Honour Motorsport Limited | Arts & recreation | 1998 |
| Horizon EOT Trustees Limited | Professional & scientific | 2021 |
| Horizon Utility Supplies Limited | Administrative & support | 2000 |
| Hornby Publishing Limited | Information & communication | 2006 |
| Hot TUB Leisure Ltd | Wholesale & retail | 2019 |
| Houghton Greenlees and Associates Limited | Professional & scientific | 1984 |
| House of Distinction Limited | Wholesale & retail | 2007 |
| Houselock Limited | Administrative & support | 2005 |
| HOY Properties Ltd | Real estate | 2025 |
| HS & HK Limited | Wholesale & retail | 2011 |
| HS Phone Repairs Ltd | Wholesale & retail | 2026 |
| Hucking Fell Ltd | Wholesale & retail | 2022 |
| Hy-Lok Southern Limited | Wholesale & retail | 1998 |
| Hyde Lift Services Limited | Manufacturing | 2018 |
| Hydracs Global Ltd | Administrative & support | 2018 |
| Hydro International (Holdings) Limited | Financial services | 1982 |
| Hydro International (UK) Ltd | Manufacturing | 1980 |
| Hydro International (Wastewater) Limited | Manufacturing | 1989 |
| Hydro International Data, Insight & Analysis Ltd | Professional & scientific | 1995 |
| Hydro International Group Ltd | Construction | 1993 |
| Hydro International Limited | Wholesale & retail | 1982 |
| Hydro-Logic Limited | Professional & scientific | 1976 |
| Hydrogen Fuel Boost Ltd | Wholesale & retail | 2024 |