| Hearthers Holding Ltd | Households | 2025 |
| Hearthers Ltd | Households | 2022 |
| Hearthers Propco 1 Ltd | Real estate | 2025 |
| Hearthers Propco 2 Ltd | Real estate | 2025 |
| Hearthers Propco 3 Ltd | Real estate | 2025 |
| Hearthers Propco 4 Ltd | Real estate | 2025 |
| Hearthers Propco 5 Ltd | Real estate | 2025 |
| Heat & Soul Ltd | Hospitality | 2019 |
| Heather Park Limited | Real estate | 2023 |
| Heathlands Care Home (Chingford) Limited | Health & social care | 2003 |
| Heathlands Nominee Co 1 Limited | Extraterritorial | 2015 |
| Heathlands Nominee Co 2 Limited | Extraterritorial | 2015 |
| Heathrow Airport Cars Ltd | Wholesale & retail | 2023 |
| Heathrow Airport Chauffeur Limited | Transport & logistics | 2024 |
| Heathrow Airport Links Ltd | Transport & logistics | 2026 |
| Heathrow Breakdown Recovery Ltd | Transport & logistics | 2022 |
| Heathrow Car Park Ltd | Wholesale & retail | 2026 |
| Heathrow Carpets & Flooring Ltd | Wholesale & retail | 2021 |
| Heathrow Cars London Ltd | Transport & logistics | 2024 |
| Heathrow Chauffeurs Ltd | Transport & logistics | 2024 |
| Heathrow DPF Solutions Ltd | Wholesale & retail | 2026 |
| Heathrow Electro Mechanical Limited | Manufacturing | 2018 |
| Heathrow Executive Connect Ltd | Transport & logistics | 2026 |
| Heathrow Global Construction Ltd | Construction | 2019 |
| Heathrow Heating & GAS Ltd | Construction | 2024 |
| Heathrow Lofts and Constructions Ltd | Construction | 2024 |
| Heathrow Lofts Design & Build Ltd | Construction | 2026 |
| Heathrow Logistics Group Ltd | Transport & logistics | 2025 |
| Heathrow Pharma Ltd | Wholesale & retail | 2023 |
| Heathrow Productions Ltd | Information & communication | 2025 |
| Heathrow Property Services Limited | Construction | 2004 |
| Heathrow Ride Hire Ltd | Wholesale & retail | 2025 |
| Heathrow Roofing Ltd | Construction | 2015 |
| Heathrow Roofing Supplies Limited | Construction | 2021 |
| Heathrow Taxi Ltd | Transport & logistics | 2025 |
| Heathrow Transport Services Ltd | Transport & logistics | 2016 |
| Heathrow Tutors Ltd | Education | 2022 |
| Heathrow Windows Ltd | Construction | 2018 |
| Heating Solutions and Contractors Ltd | Construction | 2022 |
| Heatlands Construction Limited | Construction | 2020 |
| Heatsense Eco Ltd | Construction | 2023 |
| Heatzone Services Ltd | Construction | 2024 |
| Hedge Accountancy Ltd | Professional & scientific | 2023 |
| Hedge-Earth Limited | Information & communication | 2026 |
| Hedgerley Local Limited | Wholesale & retail | 2021 |
| Heer Analytics Ltd | Information & communication | 2023 |
| Heer Courier Express Limited | Transport & logistics | 2017 |
| Hegia Property Management Limited | Administrative & support | 2007 |
| Heli One Engineering Limited | Professional & scientific | 2010 |
| Heliolex Solutions Limited | Information & communication | 2026 |
| Hellington Sports Ltd | Wholesale & retail | 2019 |
| Hello AV Ltd | Arts & recreation | 2019 |
| Hello Padel UK Limited | Arts & recreation | 2025 |
| Hello Tomorrow Ltd | Real estate | 2010 |
| Helm Motorcars Limited | Manufacturing | 2019 |
| Help International Welfare Trust UK | Health & social care | 2016 |
| Help ME Drive Limited | Education | 2026 |
| Help Starts Here Ltd | Health & social care | 2026 |
| Helping Hand Dhillon Builders Ltd | Construction | 2026 |
| Helping Hands Experts Ltd | Administrative & support | 2022 |
| Helping Hands WSM Limited | Health & social care | 2026 |
| Helvii Limited | Wholesale & retail | 2025 |
| Helvius Ltd | Wholesale & retail | 2025 |
| Hemel Copy Print (2017) Limited | Manufacturing | 2017 |
| Hempson Rock Ltd | Real estate | 1985 |
| Hencroft Street South Limited | Households | 2021 |
| Henderson Care Home Limited | Health & social care | 2019 |
| Henna Bloom Art Limited | Arts & recreation | 2024 |
| Henna Rattu Ltd | Professional & scientific | 2025 |
| Hennessy Family Holdings Ltd | Real estate | 2022 |
| Henry Property Ltd | Real estate | 2013 |
| HER Aura London Ltd | Health & social care | 2025 |
| Herannick Ltd | Real estate | 2024 |
| Herbert Walker (ETR) Limited | Other services | 1995 |
| Herbs & Spice Slough Ltd | Hospitality | 2021 |
| Herbs Library Ltd | Agriculture & fishing | 2020 |
| Heritage Auto Werks Limited | Wholesale & retail | 2014 |
| Heritage Estate Holdings Ltd | Households | 2024 |
| Heritage Foods (Slough) Limited | Wholesale & retail | 2025 |
| Heritage Kitchen and Bar (Slough) Limited | Hospitality | 2024 |
| Heritage STUDIO1 Limited | Wholesale & retail | 2025 |
| Herold Services Ltd | Transport & logistics | 2022 |
| Herschel Care Limited | Health & social care | 2023 |
| Herschel Consultancy Ltd | Professional & scientific | 2019 |
| Herschel Estates Ltd | Real estate | 2018 |
| Herschel Law Ltd | Professional & scientific | 2019 |
| Herzog Coates Ltd | Professional & scientific | 2024 |
| Hester Homes Land Ltd | Real estate | 2019 |
| Hester Homes Limited | Construction | 2007 |
| Heston Welding and Fabrication Services Limited | Manufacturing | 2021 |
| HEY Baby 4D Slough Ltd | Other services | 2024 |
| Heypex Ltd | Wholesale & retail | 2025 |
| Heysham Homes Ltd | Real estate | 2023 |
| HF 11 Trading Ltd | Hospitality | 2024 |
| HF17 Trading Limited | Hospitality | 2025 |
| HF6 Trading Ltd | Hospitality | 2024 |
| HF66 Ltd | Hospitality | 2025 |
| HF8 Trading Ltd | Hospitality | 2024 |
| HFC Franchising Ltd | Professional & scientific | 2025 |
| HFC OLD1 Ltd | Hospitality | 2024 |