| Happy Yachting Ltd | Extraterritorial | 2024 |
| HAR Plumbing and Heating Ltd | Construction | 2019 |
| Harcourt Leisure Services Ltd | Hospitality | 2018 |
| Hardhorn Court Limited | Households | 1994 |
| Hardhorn Road Dental Practice Limited | Health & social care | 2007 |
| Hargeo Investments Limited | Real estate | 2020 |
| Hargreave Hale AIM VCT PLC | Financial services | 2004 |
| Hargreave Hale Nominees Limited | Financial services | 1989 |
| Hargreaves Haulage (Marton) Limited | Transport & logistics | 1980 |
| Harlil Ltd | Manufacturing | 2021 |
| Harlo Investments Limited | Real estate | 2019 |
| Harmony House Blackpool Limited | Public administration | 2025 |
| Harmony Property Services Limited | Real estate | 2022 |
| Harper and PYE Limited | Wholesale & retail | 1984 |
| Harris Stone Limited | Information & communication | 2023 |
| Harrison Care Ltd | Health & social care | 2020 |
| Harrison Homes Developments Northwest Ltd | Households | 2026 |
| Harrow House Construction Limited | Administrative & support | 2015 |
| Harry Feeney Holdings Limited | Professional & scientific | 1988 |
| Harry Jacks & SON Limited | Construction | 2005 |
| Harry James Bathroom Design Limited | Professional & scientific | 2007 |
| Harry Scott Traffic Management Ltd Ltd | Public administration | 2025 |
| Harrys Investments Ltd | Real estate | 2026 |
| Harshi's Desserts Limited | Wholesale & retail | 2017 |
| Hartley Aero Design Limited | Administrative & support | 2011 |
| Hartsdale Developments Limited | Wholesale & retail | 1973 |
| Hastie Heating & Plumbing Ltd | Construction | 2026 |
| Hastie Rentals Limited | Real estate | 2025 |
| Hastings Point Management Company Limited | Households | 2012 |
| Haughtey Air Ltd | Wholesale & retail | 2025 |
| Haus-Martins Ltd | Construction | 2019 |
| Haval Wash Limited | Administrative & support | 2025 |
| Haven Fast Foods Ltd | Wholesale & retail | 2020 |
| Haven Properties Blackpool Limited | Construction | 2016 |
| Hawes Side Academy | Education | 2012 |
| Hawkhead, Bray & SON Limited | Real estate | 1927 |
| Hawksworth Software Ltd | Information & communication | 2014 |
| Hawthorn Gurney Ltd | Wholesale & retail | 2025 |
| Haydee Limited | Extraterritorial | 2026 |
| Hayley Hoy-Durant Limited | Agriculture & fishing | 2016 |
| Hayley-Anna Dancy Portfolio Ltd | Real estate | 2024 |
| Haymes Goods and Services Ltd | Water & waste | 2026 |
| Hayssoft Ltd | Information & communication | 2017 |
| Hayward Hotel Limited | Hospitality | 2024 |
| Hazelpoint Consultancy Limited | Information & communication | 2016 |
| Hazelwood Management Company Cumbria Limited | Households | 2024 |
| HBH Construction Ltd | Construction | 2016 |
| Hbtechconsulting Limited | Information & communication | 2010 |
| HD Plumbing & Drainage Limited | Construction | 2016 |
| HD Property Group Ltd | Real estate | 2024 |
| HD Ventures Limited | Information & communication | 2014 |
| HDC Group Limited | Administrative & support | 2017 |
| HDE Equine Care UK Limited | Manufacturing | 2024 |
| HDL Structural Solutions Ltd | Administrative & support | 2010 |
| HDM Building Ltd | Construction | 2004 |
| HDP Solicitors Ltd | Professional & scientific | 2019 |
| HE Consultancy Limited | Professional & scientific | 2021 |
| HE IS Electric Ltd | Construction | 2022 |
| Head Above the Clouds Limited | Arts & recreation | 2022 |
| Head Hunters Hair and Beauty Limited | Administrative & support | 2016 |
| Headlands (Blackpool) Limited(The) | Hospitality | 1951 |
| Headline Blackpool Limited | Wholesale & retail | 2014 |
| Headway Developments Ltd | Construction | 2023 |
| Heal Properties Ltd | Real estate | 2018 |
| Health Bridge Care Ltd | Health & social care | 2025 |
| Health Farm Ltd | Wholesale & retail | 2025 |
| Healthcare Headhunters Limited | Health & social care | 2014 |
| Healthpoint Limited | Wholesale & retail | 1996 |
| Healthy Creative Limited | Arts & recreation | 2019 |
| Heap Properties Limited | Real estate | 2017 |
| Heartstock Ltd | Wholesale & retail | 2025 |
| Heartworx Ltd | Wholesale & retail | 2025 |
| Heathdos Limited | Professional & scientific | 2013 |
| Heather Wright Limited | Other services | 2018 |
| Heatons Engineering Limited | Manufacturing | 1984 |
| Heaven for Foodies Ltd | Wholesale & retail | 2023 |
| Heavenly Fireplaces Ltd | Construction | 2020 |
| Hedge Double Ltd | Information & communication | 2016 |
| Heim Clean Co Limited | Administrative & support | 2026 |
| Heim Management Ltd | Other services | 2023 |
| Helianthus Consultancy Ltd | Other services | 2024 |
| Helix Electrical Services Limited | Construction | 2026 |
| Hellesdon JEX Ltd | Wholesale & retail | 2025 |
| Helping Hands Therapy Solutions Limited | Administrative & support | 2017 |
| Hemera Corporation Limited | Information & communication | 2021 |
| Hemo Home Joinery Ltd | Manufacturing | 2026 |
| Hemsley Hospitality Ltd | Hospitality | 2023 |
| Henco (International) Limited | Construction | 1983 |
| Henderson Property Developments Ltd | Wholesale & retail | 2025 |
| Hendon Crown Ltd | Wholesale & retail | 2025 |
| Hendrie Brickwork Ltd | Construction | 2025 |
| Hendrix Computing Ltd | Information & communication | 2018 |
| Hengyuanxiang Fast Food Limited | Hospitality | 2025 |
| Henry Championn Ltd | Transport & logistics | 2025 |
| Henry Exterior Cleaning Limited | Administrative & support | 2024 |
| Henry James Lettings Ltd | Real estate | 2018 |
| Henry Lexi Property Investment Limited | Real estate | 2019 |
| Henson Enterprises Ltd | Information & communication | 2023 |
| Heracles Wellness Ltd | Wholesale & retail | 2023 |
| Herd Property Developments Limited | Construction | 2013 |