| Hair (Greenwich) Limited | Other services | 2015 |
| Hair (Reigate) Ltd | Other services | 2009 |
| Hair by Lauren.Xox Ltd | Other services | 2025 |
| Hair Diva Star Ltd | Other services | 2025 |
| Hair Greenwich Two Limited | Other services | 2025 |
| Hair Holdings Limited | Other services | 1999 |
| Hair Solutions Swindon Ltd. | Wholesale & retail | 2018 |
| Hairbys Ltd | Other services | 2019 |
| Hairdressing Education Ltd | Other services | 2015 |
| Hairplea Ltd | Other services | 2023 |
| Haixing Media Limited | Arts & recreation | 2025 |
| Haji & Sons Meat Wholesale Ltd | Wholesale & retail | 2023 |
| Haji & Sons Traders Ltd | Wholesale & retail | 2021 |
| Haji Noor & Sons Ltd | Professional & scientific | 2025 |
| Hajiifah Limited | Wholesale & retail | 2024 |
| Hajj&Najj Limited | Construction | 2025 |
| HAK UK Trading Ltd | Wholesale & retail | 2022 |
| Hakeey Homes Limited | Health & social care | 2016 |
| Hakmay Consulting Ltd | Other services | 2004 |
| Halal B Ltd | Hospitality | 2026 |
| Halal Origins Limited | Wholesale & retail | 2020 |
| Halancroft Properties Ltd | Real estate | 2023 |
| Halani Limited | Wholesale & retail | 2015 |
| Halcyon RTM Company Limited | Households | 2011 |
| Halesnam Limited | Real estate | 2016 |
| Half Decent Music Limited | Wholesale & retail | 2025 |
| Half Moon House (Management) Company Limited | Real estate | 1999 |
| Half Moon Restaurant Ltd | Hospitality | 2014 |
| Halifax Enterprises UK Limited | Real estate | 2013 |
| Haling Park Housing Company Limited | Households | 1981 |
| Haling Park Road (South Croydon) Management Company Limited | Households | 2004 |
| Hall Associates Ltd | Hospitality | 2025 |
| Hall Building Ltd | Construction | 2026 |
| Hall Garden (Clevedon) Management Company Limited | Households | 2016 |
| Hall Place Limited | Households | 2003 |
| Hallam Fields (LM1) Management Company Limited | Households | 2006 |
| Hallam Fields (LM5) Management Company Limited | Households | 2006 |
| Hallco 715 Limited | Households | 2002 |
| Halliday's Homes & Hardware Ltd | Wholesale & retail | 2010 |
| Hallings Wharf RTM Company Limited | Households | 2007 |
| Hallwood Gardens Management Company Limited | Households | 2007 |
| Halo & Hearth Ltd | Real estate | 2026 |
| Halo House IT Ltd | Information & communication | 2020 |
| Halo House Reseller Limited | Information & communication | 2022 |
| Halo Sound Design Ltd | Administrative & support | 2015 |
| Halsard Park (Tadworth) Residents Management Company Limited | Households | 2015 |
| HAM Studio Limited | Real estate | 2024 |
| Hambledon Court Management Company Limited | Households | 1997 |
| Hamburg Bidco Limited | Financial services | 2021 |
| Hamburg Holdco Limited | Financial services | 2025 |
| Hamburg Midco Limited | Financial services | 2021 |
| Hamburg Topco Limited | Financial services | 2021 |
| Hamburgerlabs Limited | Information & communication | 2026 |
| Hamdardgrace Ltd | Real estate | 2022 |
| Hameed Distributions Ltd | Wholesale & retail | 2026 |
| Hamilton ASC Ltd | Education | 2023 |
| Hamilton Bradbury Ltd | Administrative & support | 2013 |
| Hamilton Court (Send) Limited | Households | 2003 |
| Hamina Limited | Wholesale & retail | 2020 |
| Hamlet Crescent (Little Walden) Residents Management Company Limited | Households | 2018 |
| Hamlet Grove (Longwick) Management Company Limited | Households | 2018 |
| Hammond Court (Cheltenham) Management Company Limited | Real estate | 2009 |
| Hammond Investments Ltd | Real estate | 2025 |
| Hammonds Ridge Management (NO. 3) Limited | Households | 1993 |
| Hampton Chambers Management Limited | Households | 2000 |
| Hampton DRY Cleaner Limited | Other services | 2025 |
| Hampton Equity Limited | Real estate | 2016 |
| Hampton Food Centre Ltd | Wholesale & retail | 2024 |
| Hampton House (Evesham) Management Company Limited | Households | 2003 |
| Hampton Tiles Ltd | Wholesale & retail | 2012 |
| Hamson WT Partnership Limited | Professional & scientific | 1948 |
| Hamstead Park Farm Estate Ltd | Agriculture & fishing | 2009 |
| Hamude Signs & Design Limited | Other services | 2014 |
| Hamy Academy Ltd | Education | 2023 |
| Hamzat Digital Works Ltd | Information & communication | 2025 |
| Hanakin Limited | Health & social care | 2025 |
| Hanbury Mews Limited | Households | 2017 |
| Hanbury Property Development Limited | Real estate | 1981 |
| Handcross News Limited | Wholesale & retail | 2012 |
| Handholder Care Limited | Health & social care | 2023 |
| Handle Brands Ltd | Wholesale & retail | 2024 |
| Handle Holdings Limited | Professional & scientific | 2022 |
| Handmade EU-UK-01 Ltd | Wholesale & retail | 2013 |
| Hands of Hope Health Care Limited | Health & social care | 2017 |
| Hands of Rose Ltd | Health & social care | 2019 |
| Hands of Steel Ltd | Construction | 2011 |
| Handuro Europe Ltd | Wholesale & retail | 2017 |
| Handy Harry Ltd | Information & communication | 2016 |
| Handy Tips Ltd | Information & communication | 2011 |
| Handyclick Ltd | Construction | 2019 |
| Hanger Hill Garden Estate Limited | Other services | 1987 |
| Hanhai Media Limited | Arts & recreation | 2025 |
| Hanham Hall Community Interest Company | Households | 2012 |
| Hani Investment Limited | Real estate | 2019 |
| Hanlon Bennett Consulting Limited | Real estate | 2009 |
| Hanlon Electrical Ltd | Construction | 2023 |
| Hannah Hayward Limited | Health & social care | 2022 |
| Hannah Houldsworth Ltd | Professional & scientific | 2025 |
| Hannah's Hub Ltd | Wholesale & retail | 2024 |
| Hannahtemi Limited | Professional & scientific | 2023 |