| Heli YB Ltd | Manufacturing | 2024 |
| Heli-Hb Ltd | Manufacturing | 2023 |
| Heli-Mf Ltd | Manufacturing | 2023 |
| Helico Technologies Limited | Professional & scientific | 2025 |
| Helicontractor Ltd | Manufacturing | 2026 |
| Helicopter & Aircraft Technical Services Ltd | Manufacturing | 2021 |
| Helin Therapy Ltd | Health & social care | 2020 |
| Helions Forge Ltd | Manufacturing | 2018 |
| Helitechnic Ltd | Manufacturing | 2026 |
| Helix & Metrics Ltd | Professional & scientific | 2026 |
| Hellebe Ltd | Real estate | 2018 |
| Hello Cosmos Ltd | Information & communication | 2021 |
| Hello Lello Ltd | Agriculture & fishing | 2022 |
| Hello Sushi Ltd | Hospitality | 2023 |
| Hellyer Farriery Limited | Professional & scientific | 2017 |
| Help My Property Ltd | Real estate | 2024 |
| Helpdesk Assistance Limited | Administrative & support | 2026 |
| Helpful Promo Ltd | Wholesale & retail | 2023 |
| Helvetic Blockchain Technologies Ltd | Financial services | 2022 |
| Hemat Limited | Real estate | 2022 |
| Hembedded Software Ltd. | Information & communication | 2017 |
| Hemlock Gate Management Company Limited | Households | 2025 |
| Hemlock Investments Ltd | Real estate | 2022 |
| Hempfield Court Limited | Households | 1990 |
| Hempsted Management Company Limited | Households | 2015 |
| Hemspan Ltd | Manufacturing | 2020 |
| HEN DI Trading Limited | Wholesale & retail | 2025 |
| Hengchang Nail Industry Co., Limited | Wholesale & retail | 2017 |
| Hengman Trading Ltd | Wholesale & retail | 2023 |
| Hengyang Shipping Co., Ltd. | Wholesale & retail | 2015 |
| Hening Shipping Service Co., Ltd | Wholesale & retail | 2025 |
| Hennequin Consulting Limited | Professional & scientific | 2022 |
| Heno Enterprise Co., Ltd | Extraterritorial | 2013 |
| Henosis Wealth Management Limited | Professional & scientific | 2025 |
| Henry Court Residents Association Limited | Real estate | 1985 |
| Henry E Oliver Limited | Arts & recreation | 2024 |
| Henry Newman Limited | Wholesale & retail | 2019 |
| Henslow Gardens Management Company Limited | Real estate | 2006 |
| Henslow House Freehold Owners Limited | Real estate | 2008 |
| Henslow Management Ltd | Administrative & support | 2014 |
| HEO (UK) Ltd | Wholesale & retail | 2014 |
| Hepaprint Ltd | Professional & scientific | 2018 |
| Hepyx Limited | Professional & scientific | 2019 |
| HER Communications Ltd | Information & communication | 2025 |
| Hera Management Limited | Real estate | 2019 |
| Heraeus Real Estate UK Ltd | Real estate | 2023 |
| Hercules Removals Ltd | Transport & logistics | 2023 |
| Hercules Technologies Bidco Limited | Financial services | 2022 |
| Hercules Technologies Topco Limited | Financial services | 2022 |
| Herdsy Holdings Ltd | Manufacturing | 2016 |
| Herdsy Limited | Manufacturing | 2016 |
| HERE4UK77 Ltd | Transport & logistics | 2018 |
| Herethical AI Ltd | Professional & scientific | 2024 |
| Hereward Digital Radio Limited | Information & communication | 2022 |
| Hereworks UK Limited | Professional & scientific | 2023 |
| Heritage for ALL Community Interest Company | Other services | 2015 |
| Heritage Gardens (Bedfordshire) Management Company Limited | Households | 2014 |
| Heritage International Foundation | Education | 2025 |
| Heritage Leisure Parks Limited | Hospitality | 2004 |
| Heritage Wealth Management (Cambridge) Limited | Professional & scientific | 2021 |
| Herizon.Ai Ltd | Information & communication | 2024 |
| Hermes Pictures Ltd | Information & communication | 2013 |
| Hermitage Consulting Limited | Professional & scientific | 2011 |
| Hermitage Productions Limited | Administrative & support | 2013 |
| Heroic Hearts Project UK Ltd | Health & social care | 2023 |
| Heroic Productions Ltd | Information & communication | 2010 |
| Herrdoktorjones Ltd | Health & social care | 2021 |
| Herringbonecambridge Limited | Real estate | 2021 |
| Herringswell Residents Co. Ltd. | Households | 2005 |
| Herrington Consulting Ltd | Professional & scientific | 2005 |
| Herts & Essex Restoration & Glazing Ltd | Construction | 2022 |
| Hesca Limited | Other services | 2002 |
| Hestus AD Ltd | Professional & scientific | 2024 |
| Hewitt Aviation Ltd | Manufacturing | 2016 |
| Hewitt Build Ltd | Construction | 2025 |
| Hexagon Healthcare Limited | Wholesale & retail | 2022 |
| Hexagonfab Limited | Manufacturing | 2017 |
| Hexalytica Ltd | Information & communication | 2022 |
| Hexcel (U.K.) Limited | Professional & scientific | 1972 |
| Hexcel Composites Limited | Manufacturing | 1995 |
| Hexcel Holdings (UK) Limited | Professional & scientific | 2000 |
| Hexcel Overseas | Financial services | 1999 |
| Hexin Technology Limited | Wholesale & retail | 2023 |
| Hexing International Co., Ltd. | Manufacturing | 2018 |
| Heyang International Logistics Co., Limited | Transport & logistics | 2017 |
| Heymao Ltd | Information & communication | 2021 |
| HFA Projects Ltd | Extraterritorial | 2023 |
| HFS Research Limited | Professional & scientific | 2010 |
| HG Decorating Limited | Construction | 2024 |
| HG925 Ltd | Manufacturing | 2013 |
| HH Inn Ltd | Hospitality | 2022 |
| HH Norfolk Ltd | Hospitality | 2016 |
| HH Tenants Management Limited | Real estate | 2019 |
| HHC Solutions Ltd | Manufacturing | 2022 |
| HI Garages Limited | Wholesale & retail | 2024 |
| HI Recruitment Limited | Construction | 2013 |
| HI Roofing Limited | Construction | 2013 |
| HI Sun International Co., Ltd | Extraterritorial | 2015 |
| Hi-Sci Limited | Professional & scientific | 2024 |
| Hi-Tea Ltd | Hospitality | 2021 |