| Hamilton Grant Software Ltd. | Information & communication | 1980 |
| Hampton Kitchen and Bathrooms Limited | Construction | 2019 |
| Hanch Farm Residents Management Co Ltd | Households | 2026 |
| Hand Painted Kitchens & Interiors by John Lewis Ltd | Construction | 2019 |
| Handmadepizzaco Ltd | Hospitality | 2018 |
| Hands & Wreyford Ltd | Manufacturing | 2025 |
| Handsum Ltd | Professional & scientific | 2010 |
| Hanford Media Group Ltd | Information & communication | 2025 |
| Hanmadebyhannah Limited | Wholesale & retail | 2024 |
| Hardy Motorsport Limited | Arts & recreation | 2015 |
| Harefields Smallholders Limited | Agriculture & fishing | 2026 |
| Harnce Ltd | Construction | 2022 |
| Harness Health Global Limited | Information & communication | 2021 |
| Harper Brothers (Norton Canes) Limited | Real estate | 2017 |
| Harris & Gibbs Hairdressing Limited | Other services | 2009 |
| Harris Balcombe LLP | | 2008 |
| Harris Court Residents Association Limited | Real estate | 1972 |
| Harrold Properties Ltd | Real estate | 2025 |
| Harrold Vehicle Repairs Ltd | Wholesale & retail | 2026 |
| Harry COX Ltd | Professional & scientific | 2011 |
| Harry JTM Limited | Transport & logistics | 2023 |
| Harry Tuffin Limited | Wholesale & retail | 1984 |
| Hartley Landscapes Limited | Administrative & support | 2011 |
| Hartshorne Holdings Ltd | Real estate | 2020 |
| Harvest Fields Landscapes Limited | Administrative & support | 2007 |
| Harvey Holding Group Ltd | Financial services | 2024 |
| Hash Tech Solutions Ltd | Information & communication | 2013 |
| HAT Boxes Limited | Manufacturing | 1989 |
| Haus of Bastien Ltd | Wholesale & retail | 2025 |
| Hawk EYE Capital Investments Ltd | Real estate | 2019 |
| Hawk EYE Ventures Limited | Wholesale & retail | 2011 |
| Hawksmoor DC Holdings Limited | Financial services | 2026 |
| Hawksmoor Development Consultants Limited | Real estate | 2002 |
| Hayes Grove 1 Limited | Real estate | 2018 |
| Hayes Grove 2 Limited | Real estate | 2018 |
| Hayley KIM Studios Ltd | Professional & scientific | 2025 |
| Hayman Physiology Limited | Health & social care | 2025 |
| Haynes & Co Investments Limited | Real estate | 2026 |
| Hayward Mcmullan Architects Limited | Professional & scientific | 2013 |
| Haywards Close Residents Management Company Limited | Households | 1995 |
| Haywood Holdings (Midlands) Ltd | Financial services | 2025 |
| Haywood Properties Limited | Real estate | 1984 |
| Hazardous Training & Consultancy Ltd | Professional & scientific | 2026 |
| Hazel Cakes Limited | Hospitality | 2023 |
| HBA & R Ltd | Other services | 2019 |
| HC Smart Ltd | Wholesale & retail | 2018 |
| HCL Precast Limited | Construction | 2011 |
| HD Industrial Solutions Ltd | Construction | 2026 |
| HD PH Limited | Financial services | 2022 |
| HD Tax Limited | Professional & scientific | 2024 |
| Health & Safety Nationwide Limited | Professional & scientific | 2004 |
| Health & Safety Solutions and Advanced Fire Protection & Pest Control Limited | Health & social care | 2010 |
| Heart LED Transformation Limited | Professional & scientific | 2026 |
| Heart of the Country (Holdings) Ltd | Financial services | 2019 |
| Heart of the Country Ltd | Wholesale & retail | 2008 |
| HEAT4HOMES Limited | Construction | 2009 |
| Heaven Lettings Law Consultancy Ltd | Professional & scientific | 2025 |
| Heaven Sent Birmingham Ltd | Other services | 2019 |
| Heavenfba Ltd | Wholesale & retail | 2024 |
| Hedshell Ltd | Information & communication | 2026 |
| Heimr Limited | Real estate | 2021 |
| Helen Bradshaw Marketing Ltd | Professional & scientific | 2023 |
| Helier Design Ltd | Real estate | 2022 |
| Hellmann Worldwide Logistics Limited | Transport & logistics | 1973 |
| Heneton Ltd | Professional & scientific | 2025 |
| Henry Rose Ltd | Wholesale & retail | 2013 |
| Henry Teal Limited | Real estate | 2023 |
| Hera Waterproofing Ltd | Wholesale & retail | 2023 |
| Hereford NWL Limited | Professional & scientific | 2018 |
| Heritage Building Company Lichfield Limited | Construction | 2022 |
| Heritage Lets Ltd | Real estate | 2021 |
| Hesketh Maintenance Services Limited | Professional & scientific | 2001 |
| Hexdia Limited | Wholesale & retail | 2023 |
| Hexis (UK) Limited | Wholesale & retail | 1994 |
| HEY Estates Ltd | Real estate | 2023 |
| HEY Green Raven Ltd | Information & communication | 2021 |
| HEY Hair Limited | Other services | 2017 |
| HH Hospitality Limited | Hospitality | 2012 |
| Hi-Line Services Holdings Limited | Professional & scientific | 2024 |
| Hibberd Consulting Engineers Limited | Professional & scientific | 2008 |
| HIF Holdings (U.K.) Limited | Professional & scientific | 1997 |
| Hiford Holdings Ltd | Real estate | 2023 |
| High Caliber Detailing Limited | Wholesale & retail | 2017 |
| High Coppice Limited | Information & communication | 1997 |
| High Grade Builders Limited | Construction | 2015 |
| High TIP Specialists Limited | Manufacturing | 2021 |
| Highfields Court Management Company Limited | Real estate | 2000 |
| Hightrees Group Ltd | Professional & scientific | 2015 |
| Hilin Life Products (UK) Limited | Wholesale & retail | 2011 |
| Hill & Wood Ltd | Wholesale & retail | 2015 |
| Hillstone Resources Limited | Financial services | 2015 |
| Hilltop Farm Residents Association Limited | Households | 2002 |
| Hillwood Auto Engineering Limited | Wholesale & retail | 2003 |
| Hinch Housing Ltd | Real estate | 2025 |
| Hindley & SON Limited | Manufacturing | 1995 |
| Hindreed Limited | Wholesale & retail | 1987 |
| Hints Properties Limited | Construction | 2018 |
| Hire Pro Talent Ltd | Administrative & support | 2025 |
| Hiregame Projects Limited | Real estate | 1993 |
| Hiskins Properties Limited | Real estate | 2022 |