| Hanson's Airport Express Limited | Transport & logistics | 2025 |
| Haoma (UK) Limited | Administrative & support | 2016 |
| Happy Explorers Limited | Health & social care | 2025 |
| Happysussexpubs Limited | Hospitality | 2024 |
| HAQ Industries Limited | Information & communication | 2015 |
| Harbour Learning Trust | Education | 2010 |
| Harcourt Europe Ltd | Administrative & support | 2013 |
| Harcourt International 64 Ltd | Other services | 2018 |
| Hardy's Heating Services Limited | Construction | 2026 |
| Harley PUB Co Ltd | Hospitality | 2018 |
| Harmonia Health & Wellbeing CIC | Health & social care | 2025 |
| Harmony Childcare Services Limited | Health & social care | 2013 |
| Harper Aesthetics Ltd | Health & social care | 2017 |
| Harper Aesthetics Training Ltd | Health & social care | 2021 |
| Harper Smith Bridal Ltd | Wholesale & retail | 2019 |
| Harpers Auto Centre Limited | Wholesale & retail | 2018 |
| Harps News & OFF Licence Ltd | Wholesale & retail | 2017 |
| Harrell Ltd | Other services | 2017 |
| Harriet Taylor Limited | Health & social care | 2025 |
| Harris & Garrod Limited | Agriculture & fishing | 1947 |
| Harris Engineering Services Limited | Construction | 2017 |
| Harrison Operations Ltd | Mining & quarrying | 2023 |
| Harrison T Haulage Ltd | Transport & logistics | 2019 |
| Harrison-Williams Medical Ltd | Health & social care | 2023 |
| Harrisons Mobile Mechanics Ltd | Wholesale & retail | 2025 |
| Harrisons News Limited | Wholesale & retail | 2021 |
| Harrogate Construction and Property Limited | Construction | 2019 |
| Harrop Property Solutions Limited | Real estate | 2025 |
| Harry Briggs (Fish Merchants) Limited | Wholesale & retail | 1952 |
| Harry Hickson Limited | Construction | 2026 |
| Harry’S Distribution Ltd | Wholesale & retail | 2023 |
| Hartley and Whitmore Limited | Education | 2026 |
| Hartley Hope CIC | Hospitality | 2025 |
| Harvest Wildlife Products Ltd | Manufacturing | 2005 |
| Haslams Plumbing & Heating Limited | Construction | 2016 |
| Hassan Property Investments Limited | Real estate | 2021 |
| Hasthorpe Engineering Design Limited | Professional & scientific | 2008 |
| Hatcliffe Holdings Limited | Hospitality | 2018 |
| Haven Mill Developments Ltd | Construction | 2025 |
| Haven Mill Living Ltd | Construction | 2024 |
| Haven Sands Management Company Limited | Households | 1992 |
| Haven Trials Sport Shop Limited | Wholesale & retail | 2011 |
| Haven-Kairos Medical Services Ltd | Health & social care | 2025 |
| Haverstoe Homes Ltd | Real estate | 2025 |
| Havvic Ltd | Wholesale & retail | 2018 |
| Hawkes Brae Capital Ltd | Real estate | 2022 |
| Haych Properties Ltd | Extraterritorial | 2025 |
| Haychart Limited | Professional & scientific | 1988 |
| Hayden Lets Limited | Real estate | 2013 |
| Hayers Supermarket Ltd | Wholesale & retail | 2020 |
| Haygan Meats Limited | Hospitality | 2009 |
| Hayles Properties Ltd | Real estate | 2020 |
| Hayward Mechanical Ltd | Construction | 2023 |
| Hazcon Ltd | Professional & scientific | 2023 |
| Hazelmere Developments Ltd | Households | 2017 |
| HB Corporation Ltd | Professional & scientific | 2015 |
| HB Desserts Ltd | Professional & scientific | 2019 |
| HB Forwarding Limited | Transport & logistics | 2024 |
| HB Safety Services Limited | Administrative & support | 2017 |
| HBP Storage Limited | Other services | 2017 |
| HC Longline Fishing Ltd | Agriculture & fishing | 2023 |
| HCF Catch Limited | Other services | 1999 |
| HCM Business Services Ltd | Real estate | 2019 |
| HCM Consulting Services Ltd | Information & communication | 2025 |
| HCM Designs Ltd | Manufacturing | 2019 |
| HE Says SHE Waffles Limited | Hospitality | 2012 |
| HE That IS Arthur Ltd | Hospitality | 2013 |
| HE Words Limited | Professional & scientific | 2013 |
| Healing and District Social Club | Hospitality | 2010 |
| Healing DOC Limited | Health & social care | 2011 |
| Healing Fish & Chips Limited | Hospitality | 2025 |
| Healing Grill and Pizza Ltd | Hospitality | 2023 |
| Healing Health Care Limited | Health & social care | 2010 |
| Healing Kind Ltd | Other services | 2019 |
| Healing Waters Grimsby Ltd | Professional & scientific | 2016 |
| Health and Wellbeing Partnership LLP | | 2015 |
| Health Education Humber Limited | Administrative & support | 2026 |
| Healthcare Learning Ltd | Professional & scientific | 1999 |
| Healthestate Solutions Limited | Real estate | 2024 |
| Healy Marine Company Limited | Public administration | 1993 |
| Heat Creations Ltd | Construction | 2019 |
| Heat Tech (Grimsby) Limited | Construction | 2001 |
| Heath & Hygiene Limited | Administrative & support | 2008 |
| Heath Mann Construction Ltd | Construction | 2017 |
| Heatrite Heating, Plumbing and GAS Ltd | Construction | 2019 |
| Heavy Engines Haulage Ltd | Transport & logistics | 2016 |
| Heavy Engines Stallingbrough Ltd | Wholesale & retail | 2015 |
| Heckington Pavilion Limited | Health & social care | 2019 |
| Heden Seger Ltd | Wholesale & retail | 2018 |
| Hedgehog Property Developments Ltd | Administrative & support | 2020 |
| Hedges Chilled Distribution Limited | Transport & logistics | 1997 |
| Heels and Hosiery Heaven Limited | Wholesale & retail | 2025 |
| Heica Ltd. | Construction | 2014 |
| Heirchange Ltd | Health & social care | 2026 |
| HEL East Ltd | Professional & scientific | 2010 |
| Helal Limited | Hospitality | 2022 |
| Helios Tanning Studio GY Limited | Other services | 2021 |
| Helippe Ltd. | Administrative & support | 2019 |
| Helsenor Management Company Limited | Professional & scientific | 2018 |
| Hemin UK Ltd | Real estate | 2025 |