| Hansons Consultancy Limited | Professional & scientific | 2021 |
| Hanub International Limited | Wholesale & retail | 2025 |
| Hanzi Alban Services Limited | Health & social care | 2016 |
| Hapht Ltd | Health & social care | 2024 |
| Happen Fostercare Limited | Extraterritorial | 2000 |
| Happen Holdings Limited | Extraterritorial | 2006 |
| Happy Buyer Convenience Store Ltd | Wholesale & retail | 2023 |
| Happy Days Care Agency Ltd | Health & social care | 2020 |
| Happy Deals 4 UK Ltd | Wholesale & retail | 2023 |
| Happy Faces OUT of School Club Limited | Health & social care | 2016 |
| Happy Hand Car Wash Ltd | Administrative & support | 2022 |
| Happy Haulage Ltd | Transport & logistics | 2018 |
| Happy Kitchen Farnworth Ltd | Hospitality | 2025 |
| Happy Nails Bolton Ltd | Other services | 2020 |
| Happy Place Childcare Limited | Health & social care | 2025 |
| Happy Rents Ltd | Real estate | 2021 |
| Happy Signs CIC | Health & social care | 2022 |
| Happy Village Bolton Ltd | Hospitality | 2025 |
| Happymaiden Cleaners Ltd | Administrative & support | 2024 |
| HAQ Building & Management Services Limited | Construction | 2019 |
| HAQ ENA SAQ Ltd | Information & communication | 2026 |
| Harborne Fishbar Ltd | Hospitality | 2016 |
| Harborough Group Ltd | Professional & scientific | 2024 |
| Harbour Practice Consultancy Services (Hpcs) Ltd | Professional & scientific | 2023 |
| Harbour Solicitors Ltd | Professional & scientific | 2025 |
| Harbourstone Estates Ltd | Real estate | 2025 |
| Harbur Strategic Land Limited | Real estate | 2017 |
| Hard Data Ltd | Information & communication | 2016 |
| Hardman and Cain Ltd | Manufacturing | 2021 |
| Hardman's Inns Ltd | Hospitality | 2022 |
| Hardrock Limited | Extraterritorial | 1935 |
| Hardscape Green Limited | Wholesale & retail | 2024 |
| Hardscape Group Limited | Financial services | 2020 |
| Hardscape Infrastructure Limited | Wholesale & retail | 2024 |
| Hardscape Products Limited | Manufacturing | 1994 |
| Hardscape Surfaces Limited | Wholesale & retail | 2003 |
| Hardscape Warehouse Limited | Wholesale & retail | 2024 |
| Hardstaff Consultants Ltd | Professional & scientific | 2022 |
| Hargreaves Contracting Group Limited | Financial services | 2024 |
| Hargreaves Contracting Limited | Construction | 2011 |
| Hargreaves Courier Services Ltd | Transport & logistics | 2024 |
| Hargreaves Lettings Limited | Real estate | 2025 |
| Hari Group Limited | Professional & scientific | 2015 |
| Hariff Ventures Ltd | Wholesale & retail | 2026 |
| Harino Care Limited | Health & social care | 2013 |
| Harino Limited | Information & communication | 2013 |
| Haris Azeez Traders Ltd | Wholesale & retail | 2025 |
| Haris Cars Limited | Wholesale & retail | 2023 |
| Hark Estates Limited | Real estate | 2017 |
| Harland (PC) Limited | Real estate | 2021 |
| Harland (PM) Limited | Real estate | 2021 |
| Harland HC Limited | Financial services | 2021 |
| Harland South Ltd | Hospitality | 2017 |
| Harlequin Chesterfield Sofa Ltd | Manufacturing | 2024 |
| Harlow Online Services Ltd | Information & communication | 2016 |
| Harmain Fast Food Ltd | Hospitality | 2024 |
| Harmoneycares CIC | Health & social care | 2023 |
| Harmony & Harmony Group Ltd | Real estate | 2024 |
| Harmony & Harmony Ltd | Wholesale & retail | 2023 |
| Harmony Bakes Ltd | Manufacturing | 2026 |
| Harmony Blinds Bristol Limited | Manufacturing | 2021 |
| Harmony Blinds Limited | Manufacturing | 1996 |
| Harmony Health Solutions Limited | Health & social care | 2023 |
| Harmony Landmark Ltd | Real estate | 2025 |
| Harmony Organics Ltd | Wholesale & retail | 2023 |
| Harmony Youth Project | Administrative & support | 2007 |
| Harper Cleaning Services Limited | Administrative & support | 2025 |
| Harper Williams Estate Agents Ltd | Real estate | 2016 |
| Harper Williams Property Management Ltd | Real estate | 2023 |
| Harpers Houses Ltd | Real estate | 2024 |
| Harprigg Rentals Ltd | Real estate | 2022 |
| Harrier Asset Management Limited | Real estate | 2026 |
| Harris Bear Ltd | Professional & scientific | 2022 |
| Harris Investment Group Ltd | Real estate | 2023 |
| Harris Window Cleaners Limited | Administrative & support | 1999 |
| Harrison Consulting Group Ltd | Professional & scientific | 2026 |
| Harrison Lubrication Engineering Limited | Manufacturing | 2025 |
| Harrison Mcdonald Consultancy Group Limited | Professional & scientific | 2024 |
| Harrison Supervision Limited | Transport & logistics | 2026 |
| Harrison Transport Ltd | Transport & logistics | 2023 |
| Harrisons Property Group Ltd | Real estate | 2025 |
| Harrowby Filling Station Ltd | Wholesale & retail | 2025 |
| Harrowland Services Ltd | Transport & logistics | 2024 |
| Harry Burnett Services Limited | Transport & logistics | 2016 |
| Harsimiyou Solution Limited | Real estate | 2026 |
| Hart Common Garage Limited | Wholesale & retail | 1997 |
| Hart Common Land Limited | Real estate | 2013 |
| Hart Communications Ltd | Information & communication | 2020 |
| Hartbury Properties Limited | Real estate | 2001 |
| Hartech Computation Limited | Manufacturing | 1984 |
| Harthern Holdings Limited | Financial services | 2019 |
| Harthern Property Ltd | Real estate | 2020 |
| Hartley Care Compass Ltd | Health & social care | 2023 |
| Hartleys Family Martial Arts Ltd | Arts & recreation | 2013 |
| Hartnell Properties Ltd | Real estate | 2021 |
| Harty Building Services Design Ltd | Professional & scientific | 2024 |
| Harunpharma Ltd | Health & social care | 2022 |
| Harvard Consultancy Ltd | Professional & scientific | 2015 |
| Harvard Print Limited | Manufacturing | 2010 |
| Harvest Park Limited | Financial services | 2022 |