| Hartley and Tissier Limited | Manufacturing | 2007 |
| Hartley and Tissier Partners Limited | Manufacturing | 2023 |
| Harvest TEC LLC. Ltd | Administrative & support | 2024 |
| Harvest Wealth Limited | Real estate | 2022 |
| Harvey AI UK Ltd | Information & communication | 2024 |
| Harvey Edit Ltd | Wholesale & retail | 2026 |
| Hassall Estates Ltd | Real estate | 2026 |
| Hassle Free Supplies Limited | Wholesale & retail | 2022 |
| HAT Associates Limited | Professional & scientific | 2003 |
| Hatch House Media Limited | Information & communication | 2019 |
| Hatherley Associates Limited | Professional & scientific | 2025 |
| Hatherley Bookkeeping Services Ltd. | Professional & scientific | 2019 |
| Hatherley Car Parking Limited | Administrative & support | 2008 |
| Hatherley Court Management Limited | Households | 1979 |
| Hatherley Hall (Cheltenham) Maintenance Limited | Households | 1973 |
| Hatherley House Management Company Limited | Households | 1995 |
| Hatherley Lodge Limited | Households | 2009 |
| Hatherley Worktops Ltd | Manufacturing | 2009 |
| Hatton Electrical Wholesale (Cotswold) Limited | Wholesale & retail | 2014 |
| Hatton Group Holdings Limited | Professional & scientific | 2007 |
| Hatton Hotels Group Services Limited | Hospitality | 1986 |
| Hatton Hotels Limited | Hospitality | 1982 |
| Hatton Properties Limited | Professional & scientific | 1999 |
| Hauctions Limited | Administrative & support | 2010 |
| Haulage Direct Limited | Professional & scientific | 1995 |
| Haulage Industry Training Ltd | Transport & logistics | 2014 |
| Haus (Cotswolds) Ltd | Real estate | 2020 |
| Haus Maids Cheltenham Ltd | Administrative & support | 2019 |
| Haus Worx Ltd | Construction | 2025 |
| Haven Lease (Holdings) Limited | Professional & scientific | 2012 |
| Haven Lease Limited | Real estate | 1991 |
| Havens Psychological Services Ltd | Health & social care | 2014 |
| Haversham Gardens (Newport) Management Limited | Households | 2015 |
| Hawk Data Systems Limited | Information & communication | 1991 |
| Hawling Limited | Professional & scientific | 2007 |
| Hawston Limited | Professional & scientific | 2010 |
| Hawthorn PIT Bess Limited | Energy | 2022 |
| Hawthorn PIT DC Limited | Information & communication | 2025 |
| Hawthorn PIT NG Limited | Financial services | 2022 |
| Hawthornden Management Company Limited | Households | 1988 |
| HAY Consultancy Limited | Professional & scientific | 2013 |
| Hayes Lodge Management Company Limited | Real estate | 1984 |
| Hayles Fruit Farm Limited | Agriculture & fishing | 1938 |
| Hayloft Stables Ltd | Construction | 2023 |
| Haymaker Limited | Information & communication | 1997 |
| Haymal Digital Limited | Information & communication | 2025 |
| Hayman-Joyce Broadway Limited | Real estate | 2010 |
| Haymarket Associates (IFA) LLP | | 2016 |
| Haymarket Capital Limited | Financial services | 2014 |
| Haynes Dental Limited | Health & social care | 2007 |
| Haywards RD Management Co Ltd | Households | 2024 |
| Haywood Property Management Limited | Administrative & support | 1983 |
| HAZ Consultants Limited | Professional & scientific | 2020 |
| Hazel LEA Management Company Limited | Administrative & support | 1983 |
| Hazelton Garage Limited | Wholesale & retail | 2017 |
| Hazlewoods Consulting Limited | Professional & scientific | 1981 |
| Hazlewoods Financial Planning LLP | | 2001 |
| Hazlewoods LLP | | 2005 |
| Hazlewoods Management Services Limited | Professional & scientific | 1973 |
| Hazmatlink Limited | Professional & scientific | 2004 |
| HB Electrical Contractors (SW) Ltd | Construction | 2019 |
| HB Nails Ltd | Other services | 2025 |
| HB Partnership Solutions Ltd | Administrative & support | 2024 |
| HBA Media Limited | Information & communication | 2006 |
| Hbra Limited | Wholesale & retail | 2024 |
| HC 1321 Limited | Professional & scientific | 2020 |
| HC 1339 Limited | Extraterritorial | 2022 |
| HC 1341 Limited | Extraterritorial | 2023 |
| HC 1342 Limited | Extraterritorial | 2023 |
| HC Restaurants Limited | Hospitality | 2024 |
| HCC Productions Limited | Information & communication | 2020 |
| HCG Group Limited | Manufacturing | 2025 |
| HCG Property Holdings Limited | Construction | 2021 |
| HCH Construction Ltd | Construction | 2024 |
| Hcrg Consultancy Limited | Professional & scientific | 2023 |
| Hcrg Limited | Administrative & support | 2023 |
| HCT Wealth Management Ltd | Financial services | 2026 |
| Hcubed Properties Ltd | Real estate | 2017 |
| HD Green Energy Ltd | Construction | 2025 |
| HDB 1 Limited | Professional & scientific | 2025 |
| HDB 2 Limited | Professional & scientific | 2025 |
| Hdjpartners Ltd | Professional & scientific | 2025 |
| HDL & Partners Limited | Financial services | 2017 |
| HDL Chedworth Limited | Real estate | 2023 |
| HDL Cirencester Limited | Real estate | 2018 |
| HDL Fairford Limited | Real estate | 2025 |
| HDL Group Limited | Construction | 2009 |
| HDL Projects Limited | Real estate | 2018 |
| Hdraw Holdings Limited | Financial services | 2025 |
| HDS Homes (Worcestershire) Limited | Construction | 2012 |
| HDS Homes Limited | Construction | 2011 |
| Headon PR Limited | Professional & scientific | 2014 |
| Headsight Services Ltd | Health & social care | 2017 |
| Headspace Strategies Limited | Professional & scientific | 2018 |
| Headstrong Group Limited | Health & social care | 2022 |
| Health Cake Ltd | Health & social care | 2024 |
| Health Embassy Ltd | Wholesale & retail | 2017 |
| Health Network International Limited | Extraterritorial | 2009 |
| Healthcheck Central Ltd | Extraterritorial | 2012 |
| Healthsafe Limited | Health & social care | 1990 |