| Hello A&S Limited | Wholesale & retail | 2020 |
| Hello India Limited | Hospitality | 2025 |
| Hello Taxi Bournemouth Limited | Transport & logistics | 2025 |
| Hellys Kitchen Ltd | Hospitality | 2018 |
| Helora Limited | Wholesale & retail | 2025 |
| Hemsley Financial Services Ltd | Professional & scientific | 2024 |
| Henbury Heating Limited | Construction | 2016 |
| Henbury Hire Limited | Construction | 1998 |
| Henderson Quality Inspection Ltd | Manufacturing | 2023 |
| Heniko Ltd | Transport & logistics | 2026 |
| Henners Construction Limited | Construction | 2013 |
| Henny Hardy Ltd | Arts & recreation | 2014 |
| Henry Gill Holdings Limited | Manufacturing | 2022 |
| Henry Simmons Limited | Extraterritorial | 2005 |
| Henry&Hunter Limited | Wholesale & retail | 2022 |
| Henry’S Haulage Ltd | Transport & logistics | 2018 |
| Henstridge Village Store Limited | Wholesale & retail | 2011 |
| Hephaestus R.E.D Ltd | Financial services | 2019 |
| Hepworth Holdings Limited | Financial services | 2025 |
| Hepworth House Management Limited | Households | 1999 |
| HER Arena Limited | Information & communication | 2025 |
| Herbal World Poole Ltd | Health & social care | 2013 |
| Herbert Avenue Management | Households | 2018 |
| Herbert Construction Limited | Professional & scientific | 2023 |
| Herbert Road (Westbourne) Management Company Limited | Real estate | 2011 |
| Herbes Cosmetics Ltd | Wholesale & retail | 2023 |
| Hercules Industries Limited | Administrative & support | 2002 |
| Here Hold This Ltd | Information & communication | 2022 |
| HERE4YOU Support Limited | Health & social care | 2022 |
| Herenow Media Ltd | Professional & scientific | 2024 |
| Heritage Health Limited | Financial services | 2013 |
| Heritage Landscaping & Gardens Ltd | Administrative & support | 2025 |
| Heritage Performance Ltd | Health & social care | 2023 |
| Heritage Tours & Safaris Limited | Administrative & support | 2020 |
| Herjavec Group Limited | Information & communication | 2003 |
| Herman Estates Limited | Real estate | 2017 |
| Herne Bay Limited | Real estate | 2021 |
| Hero Umbrella Limited | Administrative & support | 2013 |
| Herring & Co Property Group Limited | Real estate | 2026 |
| Hersillon Ltd | Financial services | 2025 |
| Hertfordshire Tehnologies Limited | Construction | 2023 |
| HES (Highland Electrical Services) Limited | Construction | 2018 |
| Hesbs Limited | Arts & recreation | 2012 |
| Heskia Park Ltd | Real estate | 2025 |
| Hester Property Ltd | Real estate | 2021 |
| Hewmann Ltd | Information & communication | 2012 |
| HEX Foundry Ltd | Information & communication | 2025 |
| Hexane Networks Limited | Information & communication | 2016 |
| Hexner Limited | Information & communication | 2007 |
| Heycheeky Ltd | Wholesale & retail | 2018 |
| Heydergroup Limited | Wholesale & retail | 2025 |
| Heymansvfx Limited | Information & communication | 2019 |
| Heyzel Limited | Wholesale & retail | 2025 |
| Hfhg Ltd | Hospitality | 2019 |
| HFR Consulting Limited | Information & communication | 2023 |
| HG Aesthetics Limited | Wholesale & retail | 2025 |
| HH Sculpture Ltd | Information & communication | 2012 |
| HHC Wash Ltd | Wholesale & retail | 2024 |
| HHH Food Ltd | Hospitality | 2022 |
| HHP (UK) Ltd | Other services | 2014 |
| Hiap Limited | Professional & scientific | 2023 |
| Hidden Hangout Ltd | Wholesale & retail | 2025 |
| Hidden Ideas Limited | Extraterritorial | 2006 |
| Higcommerce Ltd | Wholesale & retail | 2020 |
| High Blood Pressure Ltd | Information & communication | 2025 |
| High LOW Styling Ltd | Information & communication | 2025 |
| High Performance Concreting (HPC) Limited | Construction | 2023 |
| High Profile Properties (UK) Limited | Real estate | 2003 |
| High Profile Services (UK) Limited | Construction | 2009 |
| High Thread Ltd | Wholesale & retail | 2025 |
| High Time Technical Consultants Ltd | Manufacturing | 2003 |
| High-Spec Cleaning Contractors Limited | Administrative & support | 2012 |
| Highfields Vets Limited | Professional & scientific | 2020 |
| Highlands END Farm Caravan Park Limited | Hospitality | 1972 |
| Highlight Electrical Contractors Ltd | Construction | 2019 |
| Highlight Retail Ltd | Wholesale & retail | 2022 |
| Highmoor Court (Poole) Management Company Limited | Real estate | 2015 |
| Highscore Associates Limited | Hospitality | 2005 |
| Highstreet Outlet Clothing Limited | Wholesale & retail | 2013 |
| Hightown Engineering Limited | Professional & scientific | 2005 |
| Highwind Investment Ltd | Manufacturing | 2016 |
| Highzenith Ltd | Professional & scientific | 1999 |
| HIJ Engineering and Consultancy Ltd | Manufacturing | 2026 |
| Hiker Cafe Limited | Hospitality | 2009 |
| Hill & Bellinger Ltd. | Wholesale & retail | 2002 |
| Hill Osborne Audit Services Ltd | Professional & scientific | 2024 |
| Hill Osborne Ltd | Professional & scientific | 2010 |
| Hill Osborne Property LLP | | 2024 |
| Hillbury Country Park Limited | Construction | 2023 |
| Hillcrest House Management Company Limited | Households | 2022 |
| Hilldonia Builders Limited | Construction | 1999 |
| Hillingdon HR Ltd | Administrative & support | 2020 |
| Hillingdon Innovation Ltd | Professional & scientific | 2022 |
| Hillsong International (UK) | Other services | 2021 |
| Hillview Flowers and Events Limited | Wholesale & retail | 2013 |
| Hinckel Ltd | Wholesale & retail | 2025 |
| Hinooki Ltd | Wholesale & retail | 2025 |
| Hinton Land Limited | Agriculture & fishing | 2017 |
| Hinton Road Investment Limited | Real estate | 2013 |
| Hipfan Limited | Professional & scientific | 1993 |