| Haus Bloc RBM Ltd | Administrative & support | 2019 |
| Haus of Anais Ltd | Other services | 2026 |
| Haus of Core Ltd | Arts & recreation | 2025 |
| Haus of Tint Ltd | Other services | 2024 |
| Haus Propeties Sales Leeds Limited | Real estate | 2015 |
| Haus Rent Ltd | Other services | 2020 |
| Haus Student Limited | Real estate | 2019 |
| Haus York Limited | Real estate | 2024 |
| Have Consulting Ltd | Professional & scientific | 2025 |
| Havelock Europa PLC | Manufacturing | 1963 |
| Havelock Hunter Asset Management Limited | Financial services | 2009 |
| Havelock Hunter Nominees Limited | Professional & scientific | 2004 |
| Haven Cybersecurity Limited | Information & communication | 2022 |
| Haven Green Investment Management (UK) Limited | Professional & scientific | 2024 |
| Haven Property Services Limited | Real estate | 2020 |
| Haven Resources Limited | Professional & scientific | 1988 |
| Haven Stays Ltd | Real estate | 2023 |
| Haven Tree Care Limited | Real estate | 2019 |
| Havencrest Capital Ltd | Real estate | 2025 |
| Havencrest Properties Ltd | Real estate | 2026 |
| Havenessensials Limited | Wholesale & retail | 2025 |
| Havenfern Limited | Administrative & support | 1983 |
| Havensgate Properties Ltd | Real estate | 2025 |
| Havensnipes Ltd | Professional & scientific | 2026 |
| Haventransportservices Ltd | Transport & logistics | 2025 |
| Haverah Park Management Company Limited | Households | 2003 |
| Havi Property Limited | Real estate | 2021 |
| Havillah World Services Limited | Wholesale & retail | 2018 |
| Havn Ventures Limited | Real estate | 2025 |
| Havoc Airsoft (GB) Ltd | Arts & recreation | 2014 |
| Havoc Fight Gear Ltd | Manufacturing | 2013 |
| Hawaa Homes Ltd | Real estate | 2025 |
| Hawk Security Limited | Administrative & support | 2024 |
| Hawkhill Tavern Ltd | Hospitality | 2019 |
| Hawkins Family Law Limited | Professional & scientific | 2010 |
| Hawkins-Spencer Investments Ltd | Professional & scientific | 2024 |
| Hawkmoon I.T. Ltd | Information & communication | 2025 |
| Hawksley Enterprises Ltd | Real estate | 2023 |
| Hawkstone Farms Ltd | Wholesale & retail | 2025 |
| Hawksworth Holdings Limited | Manufacturing | 2012 |
| Hawksworth Lane Management Company Limited | Real estate | 1984 |
| Hawksworth Older People Support Services (Hops) Ltd | Health & social care | 2009 |
| Hawksworth Road Management Company Limited | Real estate | 2005 |
| Hawler Properties Ltd | Real estate | 2026 |
| Haworth Gateway Ltd | Hospitality | 2023 |
| Hawrix Ltd | Wholesale & retail | 2025 |
| Hawskercourt Limited | Extraterritorial | 1973 |
| Hawthorn Park Management Company Limited | Real estate | 2002 |
| Hawthorn Villas Residents Management Company Limited | Professional & scientific | 2011 |
| Hawthorne & Grey Ltd | Households | 2025 |
| Hawthorne Property Investments Limited | Real estate | 2022 |
| Hawtrey Properties Limited | Real estate | 2015 |
| Hawwa Contracting Limited | Financial services | 2018 |
| HAY Associates Limited | Professional & scientific | 2011 |
| Hayat Enterprise UK Ltd | Wholesale & retail | 2018 |
| Hayat Homes Group Ltd | Real estate | 2026 |
| Haych M Solutions Ltd | Information & communication | 2025 |
| Haycock & Hague (Pipework) Limited | Wholesale & retail | 2000 |
| Haycott Properties (Leeds) Limited | Real estate | 2022 |
| Hayden Daniel (Commercial) Limited | Real estate | 2012 |
| Hayden Daniel Properties Limited | Real estate | 1975 |
| Hayden Dean Property Limited | Real estate | 2017 |
| Haydock Construction (M&E) Ltd | Construction | 2024 |
| Haydon Healy Limited | Administrative & support | 2021 |
| Haydon White Testing Limited | Information & communication | 2013 |
| Hayes Gardening and Landscaping Ltd | Administrative & support | 2020 |
| Hayes Security Bollards Limited | Construction | 2025 |
| Hayes Thermal Insulation Ltd | Construction | 2015 |
| Hayfield Group Ltd | Real estate | 2023 |
| Hayl.Tattoo Ltd | Other services | 2024 |
| Haylen Properties Ltd | Real estate | 2025 |
| Hayley Rahmanian Communications Ltd | Professional & scientific | 2021 |
| Hayley Reynolds Events Ltd | Hospitality | 2023 |
| Hayloft Holiday Cottage Limited | Hospitality | 2020 |
| Haymans Solicitors Limited | Professional & scientific | 2016 |
| Hayme Trading Ltd | Wholesale & retail | 2022 |
| Haynes Boyd Ltd | Information & communication | 2023 |
| Haypark Properties Ltd | Real estate | 2019 |
| Haythornthwaite Consultants Limited | Professional & scientific | 2022 |
| Hayton Accountancy Limited | Professional & scientific | 2007 |
| Hayton Insurance Brokers Limited | Financial services | 2014 |
| Haywood Thomas Ltd | Administrative & support | 2023 |
| HAYWOOD5 Limited | Health & social care | 2018 |
| HAZ Labels Direct Ltd | Manufacturing | 2024 |
| Haz-Led Limited | Professional & scientific | 2017 |
| Hazama Limited | Real estate | 2016 |
| Hazel Futures Ltd | Administrative & support | 2025 |
| Hazel Homes (Yorkshire) Ltd | Real estate | 2021 |
| Hazel Products UK Limited | Manufacturing | 2011 |
| Hazel Savage Ltd | Professional & scientific | 2022 |
| HAZEL4D Ltd | Extraterritorial | 2015 |
| Hazelgrave Roofing Ltd | Construction | 2023 |
| Hazelmoor Fold Management Company Limited | Households | 2014 |
| Hazelwood Property Group Ltd. | Real estate | 2023 |
| Hazher Pizza Ltd | Hospitality | 2024 |
| Hazomo Properties Ltd | Real estate | 2023 |
| Hazon & Pitron Ltd | Transport & logistics | 2025 |
| Hazon Consulting Ltd. | Professional & scientific | 2014 |
| Haztec International Ltd | Manufacturing | 2001 |
| HB Alliance Limited | Wholesale & retail | 2025 |