| Happy Heating & Plumbing Ltd | Construction | 2024 |
| Happy Hive Parties & Events Ltd | Health & social care | 2025 |
| Happy Horizons Childcare Limited | Health & social care | 2025 |
| Happy House (My) Limited | Hospitality | 2016 |
| Happy House Daycare Ltd | Health & social care | 2022 |
| Happy Household Limited | Transport & logistics | 2015 |
| Happy Kitchen TA Ltd | Hospitality | 2023 |
| Happy Lamb Limited | Hospitality | 2025 |
| Happy Little Hoppers Limited | Health & social care | 2026 |
| Happy Nails & Beauty Salon Ltd | Other services | 2024 |
| Happy Paws and Friends Ltd | Wholesale & retail | 2026 |
| Happy Scrappers Ltd | Water & waste | 2023 |
| Happy Skincare Ltd | Public administration | 2026 |
| Happy Squirrel Ltd | Real estate | 2024 |
| Happy Tasty Catering Ltd | Manufacturing | 2024 |
| Happy Valley Garden Limited | Hospitality | 2017 |
| Happy Valley Properties Limited | Real estate | 2024 |
| HAQ Associates Limited | Health & social care | 2006 |
| HAQ Halal Limited | Real estate | 1994 |
| HAQ Ltd | Real estate | 2026 |
| Haqooq Aspire for More | Education | 2013 |
| Haque Commercial Solutions Limited | Extraterritorial | 2015 |
| HAR Sessions Ltd | Other services | 2023 |
| Haram Communications Ltd | Other services | 2008 |
| Haranngeo | Financial services | 2015 |
| Haras Properties Ltd | Real estate | 2021 |
| Harborough Hotel SPV Limited | Real estate | 2024 |
| Harbour City Takeaway Ltd | Hospitality | 2022 |
| Harbour Exchange Limited | Manufacturing | 2020 |
| Harbour Fish and Chips Ltd | Hospitality | 2026 |
| Harbourlight Publishing Ltd | Information & communication | 2025 |
| Harbourstone Horizon Ltd | Financial services | 2025 |
| Harcare Limited | Health & social care | 2004 |
| Harcroft Estates Limited | Extraterritorial | 2006 |
| Hard Salts Hydration Ltd | Wholesale & retail | 2026 |
| Hard Times Ltd | Information & communication | 2024 |
| Hardaker Building Services Limited | Construction | 2003 |
| Hardaker Homes Ltd | Real estate | 2020 |
| Hardakers (Horsforth) Limited | Manufacturing | 1961 |
| Hardakers Bakery Limited | Manufacturing | 2024 |
| Hardboiledegg Media Ltd | Manufacturing | 2024 |
| Hardcastle & Hardcastle Limited | Financial services | 2020 |
| Hardeep Puee Ltd | Health & social care | 2023 |
| Hardenberg Trading Ltd | Construction | 2012 |
| Harder Bros (Holdings) Limited | Financial services | 2017 |
| Harder Bros. Limited | Manufacturing | 1961 |
| Harding and Roden Logistics Ltd | Transport & logistics | 2017 |
| Harding IT Consultancy Limited | Information & communication | 2007 |
| Harding Legal Ltd | Other services | 2017 |
| Harding Logistics Service Providers Ltd | Transport & logistics | 2019 |
| Harding Mediation Limited | Professional & scientific | 2026 |
| Hardings Insurance Brokers Limited | Financial services | 2025 |
| Hardly Hyperbolic Ltd | Information & communication | 2024 |
| Hardly Ltd | Administrative & support | 2017 |
| Hardman Financial Advice Ltd | Professional & scientific | 2020 |
| Hardman Plant Services Limited | Manufacturing | 2016 |
| Hardox Ltd | Wholesale & retail | 2010 |
| Hardwick Highway Homes Ltd | Wholesale & retail | 2024 |
| Hardy Barberz Ltd | Other services | 2025 |
| Harecroft Civil Engineering Limited | Professional & scientific | 2023 |
| Harecroft Construction Limited | Construction | 2022 |
| Harecroft Developments Limited | Construction | 2026 |
| Harecroft Group Limited | Construction | 2022 |
| Harecroft Homes Limited | Real estate | 2018 |
| Harehills Action Team CIC | Health & social care | 2025 |
| Harehills Community Interest Company | Hospitality | 2007 |
| Harehills Fones & Repairs Ltd | Wholesale & retail | 2024 |
| Harehills Foods Ltd | Wholesale & retail | 2020 |
| Harehills Fried Chickens Ltd | Hospitality | 2019 |
| Harehills Property Ltd | Real estate | 2019 |
| Harehills Store Ltd | Wholesale & retail | 2026 |
| Harehills Supermarket Ltd | Other services | 2024 |
| Harehills Tyres Ltd | Wholesale & retail | 2023 |
| Harewood Energy Supply Company Limited | Energy | 1970 |
| Harewood Esquire Limited | Real estate | 2025 |
| Harewood Farming Company Limited (the) | Agriculture & fishing | 1973 |
| Harewood Food & Drink Project Ltd | Wholesale & retail | 2016 |
| Harewood Holistics Ltd | Other services | 2019 |
| Harewood Homes (Leeds) Ltd | Real estate | 2023 |
| Harewood House Trading Limited | Wholesale & retail | 1986 |
| Harewood House Trust Limited | Arts & recreation | 1986 |
| Harewood International Products Ltd | Wholesale & retail | 2012 |
| Harewood Law Limited | Professional & scientific | 2012 |
| Harewood Medical Limited | Health & social care | 2014 |
| Harewood Mews (Maintenance) Limited | Households | 1977 |
| Harewood Provisions Company Limited | Wholesale & retail | 2016 |
| Hargo Group Holdings Ltd | Financial services | 2026 |
| Hargrave Consulting Ltd | Construction | 2025 |
| Hargreaves Tiling and Bathrooms Ltd | Construction | 2025 |
| Harguntej Ltd | Real estate | 2025 |
| Hari Anand UK Distributors Ltd | Wholesale & retail | 2020 |
| Hari Anand UK Group Ltd | Wholesale & retail | 2021 |
| Harico Ltd | Wholesale & retail | 2018 |
| Hariharasuthan Global Limited | Information & communication | 2019 |
| Hariri Collective Ltd | Hospitality | 2026 |
| Hariri Holdings Ltd | Real estate | 2026 |
| Haris 16 Ltd | Construction | 2017 |
| Harjass Motors Limited | Wholesale & retail | 2019 |
| Hark Systems Ltd. | Manufacturing | 2016 |
| Harker Leisure Limited | Arts & recreation | 2002 |