| Hamlet Circuits Ltd | Information & communication | 2025 |
| Hamletts Harvest Ltd | Wholesale & retail | 2024 |
| Hammer Building Construction Limited | Manufacturing | 2023 |
| Hammond Grange Limited | Real estate | 1984 |
| Hammonds Corporate Holdings Limited | Other services | 2018 |
| Hammonds of Ashby Limited | Wholesale & retail | 2008 |
| Hamper&Hue Ltd | Wholesale & retail | 2025 |
| Hampson Creative Ltd | Wholesale & retail | 2024 |
| Hampsons Estate Agents Limited | Real estate | 2020 |
| Hampsons Letting Agents Ltd | Real estate | 2023 |
| Hampton Crow Ltd | Wholesale & retail | 2025 |
| Hampton House Dental Practice Ltd | Health & social care | 2017 |
| Hampton House Dental Surgery Ltd | Health & social care | 2017 |
| Hampton House Practice Ltd | Health & social care | 2025 |
| Hampton Stores Limited | Wholesale & retail | 2014 |
| Hamza & Muskan Courier Ltd | Transport & logistics | 2017 |
| Hamza Catering Limited | Hospitality | 2019 |
| Hamza Humera Hussain Private Limited | Real estate | 2020 |
| Hamzah Optics Ltd | Health & social care | 2026 |
| HAN Table Ltd | Manufacturing | 2026 |
| Hanan IT Solutions Limited | Information & communication | 2017 |
| Hanat Ltd | Wholesale & retail | 2025 |
| Hancock Financial Consultancy Limited | Professional & scientific | 2017 |
| Hand to Hand Limited | Administrative & support | 2002 |
| Handley Chase (Sleaford) Residents Management Company Limited | Real estate | 2022 |
| Handprints (Corby) Ltd | Health & social care | 2025 |
| Hands Lettings Limited | Real estate | 2017 |
| Hands on MEP Limited | Construction | 2008 |
| Hands Together Trust | Health & social care | 2018 |
| HANDS4U Limited | Administrative & support | 2019 |
| Handsproperites Limited | Real estate | 2017 |
| Handy Andy's Maintenance Services Limited | Other services | 2025 |
| Handy Medical Ltd | Manufacturing | 2016 |
| Handyman Builder Ltd | Construction | 2020 |
| Hane Properties Limited | Real estate | 2022 |
| Haney Barber Ltd | Other services | 2026 |
| Hangar Shield Ltd | Wholesale & retail | 2025 |
| Hangry Moments Kitchen Ltd | Hospitality | 2025 |
| Hanh Ltd | Information & communication | 2026 |
| Hani Enterprise (UK) Ltd | Construction | 2014 |
| Hanif Carpet & Flooring Ltd | Wholesale & retail | 2025 |
| Hanishify Ltd | Wholesale & retail | 2025 |
| Hanlon Property Group Ltd | Real estate | 2025 |
| Hannah Satchwell Coaching & Development Limited | Administrative & support | 2022 |
| Hannam Holdings Limited | Real estate | 1947 |
| Hannan Kitchen Limited | Hospitality | 2021 |
| Hannibal Bath Properties Limited | Extraterritorial | 2015 |
| Hannibal Fashions Ltd | Wholesale & retail | 2018 |
| Hannington Transport Ltd | Transport & logistics | 2014 |
| Hanoptics Ltd | Health & social care | 2026 |
| Hans Motors Limited | Wholesale & retail | 2021 |
| Hans Property Invest Limited | Real estate | 2024 |
| Hans Real Estate Ltd | Real estate | 2020 |
| Hansa Consulting Ltd | Professional & scientific | 2021 |
| Hansoft Ltd | Information & communication | 2019 |
| Hansom Airport Taxis Ltd | Transport & logistics | 2024 |
| Hansom Taxis Limited | Transport & logistics | 2011 |
| Hanson Bespoke Ltd | Manufacturing | 2019 |
| Hanson Heating & Plumbing Ltd | Construction | 2019 |
| Hanson's Holdings Ltd | Financial services | 2024 |
| Hanss Properties Limited | Real estate | 2026 |
| Hanss Robotics Limited | Manufacturing | 2026 |
| Hansson Ltd | Other services | 2025 |
| Hanstech Consultancy Limited | Information & communication | 2021 |
| Hanuman Properties Ltd | Real estate | 2022 |
| Hanumanta Ltd | Real estate | 2024 |
| Hanuva Ltd | Information & communication | 2025 |
| Hanwood Enterprises Ltd | Transport & logistics | 2015 |
| Hanzo MED for Industry and Trade Ltd | Manufacturing | 2023 |
| Hapheart Ltd | Arts & recreation | 2021 |
| HAPPIN53S Limited | Wholesale & retail | 2025 |
| Happitaly Ltd | Hospitality | 2024 |
| Happy & HAN Ltd | Wholesale & retail | 2025 |
| Happy Buying Limited | Wholesale & retail | 2021 |
| Happy Children Home Limited | Health & social care | 2017 |
| Happy Choice Ltd | Wholesale & retail | 2024 |
| Happy Group (UK) Limited | Health & social care | 2015 |
| Happy Hearts Home Nursery Ltd | Health & social care | 2024 |
| Happy Hedgehogs Nursery Ltd | Education | 2025 |
| Happy Hive Day Nurseries Ltd | Health & social care | 2024 |
| Happy Hive Productions Ltd | Arts & recreation | 2023 |
| Happy Homes Real Estate Brokers UK Limited | Real estate | 2021 |
| Happy Hounds Hydro Limited | Other services | 2025 |
| Happy Little Hearts Ltd | Education | 2017 |
| Happy Little Sweethearts Ltd | Education | 2020 |
| Happy Nails (Leicester) Ltd | Other services | 2026 |
| Happy Nest Leicestershire Limited | Health & social care | 2026 |
| Happy Pet Products Limited | Administrative & support | 2001 |
| Happypt Ltd | Wholesale & retail | 2026 |
| Haptic Recruit Limited | Other services | 2018 |
| HAQ Homes Ltd | Real estate | 2025 |
| HAQ Property Management Ltd | Hospitality | 2025 |
| Haqfamily Ltd | Administrative & support | 2024 |
| HAR Bhole Limited | Wholesale & retail | 2025 |
| HAR Grand Event & Catering Limited | Hospitality | 2026 |
| Hara Enterprise Ltd | Wholesale & retail | 2020 |
| Harambeea Ltd | Wholesale & retail | 2024 |
| Haran Letting Ltd | Real estate | 2021 |
| Harbhole Construction Ltd | Construction | 2025 |
| Harbhole Group Ltd | Wholesale & retail | 2025 |