| Herself Limited | Extraterritorial | 2006 |
| Hertz Kompressoren Limited | Wholesale & retail | 2009 |
| Hesketh Barlow Recruitment & Coaching Ltd | Professional & scientific | 2020 |
| Hesketh Jones Construction Ltd | Construction | 2019 |
| Hesketh Jones Consulting Ltd | Professional & scientific | 2025 |
| Hesketh Jones Developments Ltd | Construction | 2025 |
| Hesketh Medical Limited | Health & social care | 2024 |
| Hesketh Real Estate Limited | Real estate | 2025 |
| Hesketh Transport Services Limited | Transport & logistics | 2018 |
| Heskin Consulting Limited | Administrative & support | 2014 |
| Heskin Hall Farm Holdings Limited | Financial services | 2014 |
| Hewer Flats Limited | Households | 1997 |
| Hewitt-Ashcroft Property Lettings Limited | Real estate | 2024 |
| Hexa Electrical Services Ltd | Construction | 2020 |
| Hexagon Care Services Limited | Health & social care | 2014 |
| Hexagon Digital Infrastructure Ltd | Professional & scientific | 2023 |
| Hexagon Hygiene Ltd | Water & waste | 2017 |
| Hexagon Renovations Ltd | Construction | 2025 |
| Hexagon Vocational Services Limited | Education | 2021 |
| Hexosoft Ltd | Information & communication | 2018 |
| HEY Haberdashery Ltd | Wholesale & retail | 2020 |
| Heyhouses of ST. Annes Limited | Administrative & support | 2003 |
| Heyland Recruitment Ltd | Administrative & support | 2010 |
| Heyman Preston Ltd | Hospitality | 2024 |
| Heywood Water Services Limited | Construction | 2009 |
| Heyworth & Co Group Ltd | Professional & scientific | 2023 |
| HF Oboh Carer Ltd | Health & social care | 2019 |
| Hfka Couriers Ltd | Transport & logistics | 2018 |
| HG Heating Solutions Limited | Construction | 2021 |
| HG3 Technology Ltd | Professional & scientific | 2025 |
| HG3 Trading Ltd | Arts & recreation | 2024 |
| HGK Management Ltd | Information & communication | 2023 |
| HH Developments NW Limited | Construction | 2025 |
| HH Project Services Ltd | Professional & scientific | 2025 |
| HHF Holdings Limited | Financial services | 2026 |
| HHH Health Ltd | Health & social care | 2015 |
| HHI Foods Ltd | Hospitality | 2023 |
| Hhmanagementuk Ltd | Professional & scientific | 2018 |
| Hhnextgen Ltd | Professional & scientific | 2025 |
| HHR Facilities Limited | Real estate | 2019 |
| HHW Properties Ltd | Construction | 2025 |
| HI Brows by Tonia Limited | Other services | 2022 |
| HI Tech Engines Limited | Wholesale & retail | 1999 |
| Hi-Land Worldwide Ltd | Administrative & support | 2026 |
| Hi-Q Trading Limited | Wholesale & retail | 2023 |
| Hi-Tech AV Ltd | Information & communication | 2022 |
| Hibberd Distribution Limited | Wholesale & retail | 1999 |
| Hibrid Solution UK Ltd | Real estate | 2020 |
| HIC NW Ltd | Wholesale & retail | 2024 |
| Hidden Terrace Limited | Hospitality | 2023 |
| Hiddenpictures Limited | Manufacturing | 2004 |
| High Floor Rentals Ltd | Real estate | 2010 |
| High Grains Forestry Ltd | Agriculture & fishing | 2023 |
| High Level Maintenance Limited | Construction | 2019 |
| High Peak Autos Ltd | Wholesale & retail | 2015 |
| High Towers Removal, Taxis and Logistics Services Limited | Transport & logistics | 2025 |
| Highall Developments Ltd | Construction | 2017 |
| Higham Holdings Ltd. | Real estate | 2025 |
| Highams Homes Ltd | Real estate | 2022 |
| Highchief Ltd | Real estate | 2023 |
| Highcroft Medical Group Limited | Health & social care | 2024 |
| Highcroft Medical Services Limited | Health & social care | 2019 |
| Higher Health U.K . Ltd | Education | 2024 |
| Higher Landskill Farm LLP | | 2018 |
| Higher Walton Auto Bodies Limited | Wholesale & retail | 2014 |
| Higher Walton Kebabs Ltd | Hospitality | 2019 |
| Highfield Fires and Flues Limited | Construction | 2023 |
| Highfield Hydro Ltd | Arts & recreation | 2019 |
| Highfield PFI Holdco Limited | Extraterritorial | 2010 |
| Highfield PFI SPV Limited | Construction | 2010 |
| Highfield Priory School Limited | Education | 1974 |
| Highfold Enterprise Limited | Wholesale & retail | 2012 |
| Highgate Asset Investments Ltd | Administrative & support | 2016 |
| Highgate Building Construction Ltd | Construction | 2024 |
| Highgate Goods Ltd | Wholesale & retail | 2023 |
| Highgate Medical Ltd | Health & social care | 2023 |
| Highgate Renovations Limited | Administrative & support | 2025 |
| Highland Clouds Glamping and Camping Ltd | Hospitality | 2022 |
| Highlane Property Limited | Construction | 2022 |
| Highlight Property Solutions Ltd | Real estate | 2025 |
| Highlight Technologies Limited | Information & communication | 2016 |
| Highrigg Consultancy Ltd | Professional & scientific | 2010 |
| Highsuit Limited | Other services | 2015 |
| Highton Heating Ltd | Construction | 2008 |
| Hightons Ltd | Professional & scientific | 2023 |
| Higro Systems (UK) Limited | Agriculture & fishing | 2020 |
| Higson Installations Limited | Construction | 2023 |
| Hilgarth Ltd | Information & communication | 2018 |
| Hill Baldwin Limited | Education | 2012 |
| Hill Top Properties (Barton) Limited | Real estate | 1969 |
| Hill View Holidays Limited | Real estate | 2022 |
| Hillcrest Ingol Services Limited | Wholesale & retail | 2014 |
| Hilldawe Ltd | Financial services | 2025 |
| Hills Safety and Training Services Ltd | Professional & scientific | 2020 |
| Hilltop Brasserie Limited | Hospitality | 2025 |
| Hilton & Blackmore Ltd | Manufacturing | 2014 |
| Hilton Hair Limited | Other services | 2024 |
| Hilton Lees Limited | Other services | 2002 |
| Himachines Ltd | Wholesale & retail | 2016 |
| Himalayan Adventure Holiday Limited | Administrative & support | 2018 |