| Hayes & Sons Construction Ltd. | Construction | 2019 |
| Hayestec Limited | Professional & scientific | 2014 |
| Hayley Irving-Law Ltd | Administrative & support | 2017 |
| Hayley Mcafee Ltd | Wholesale & retail | 2025 |
| Hayley Turner (Racing & Promotion) Limited | Arts & recreation | 2010 |
| Haylock and Hunter Ltd | Real estate | 1999 |
| Hayman Creative Limited | Other services | 2003 |
| Haynes Ents Ltd | Arts & recreation | 2024 |
| Haynes Jointing and Electrical Limited | Construction | 2025 |
| Hayoonz Beauty & Aesthetics Ltd. | Other services | 2024 |
| Hayre Housing Limited | Real estate | 2025 |
| Hayton Consulting Ltd | Administrative & support | 2015 |
| Haytop Country Park Limited | Hospitality | 2015 |
| Haywood Grace Limited | Professional & scientific | 2021 |
| Haywood Oaks Limited | Real estate | 2007 |
| Haywoods Developments Ltd | Construction | 2025 |
| Hayz Creations Ltd | Wholesale & retail | 2024 |
| HAZ Barbers Ltd | Other services | 2022 |
| Hazel Atkinson Jewellery LLP | | 2010 |
| Hazel Card Ltd | Information & communication | 2026 |
| Hazel Coaching Limited | Administrative & support | 2017 |
| Hazel Court Blidworth (Maintenance) Limited | Real estate | 2010 |
| Hazel Wood-Investors Ltd | Wholesale & retail | 2026 |
| Hazid Holdings Ltd | Financial services | 2020 |
| Hazid Technologies Ltd | Information & communication | 1998 |
| HB at Lambley Limited | Wholesale & retail | 2018 |
| HB Birmingham (Construction) Ltd | Construction | 2019 |
| HB Online Limited | Wholesale & retail | 2020 |
| HB Publishing House Ltd | Information & communication | 2023 |
| HB Rowland Properties Ltd | Real estate | 2024 |
| HB Total Security Ltd | Administrative & support | 2017 |
| HB Watches Ltd | Wholesale & retail | 2022 |
| HB4D Limited | Other services | 2017 |
| HBB FM & Small Works Ltd | Other services | 2020 |
| HBC Capital Finance Ltd | Construction | 2018 |
| HBE (UK) Ltd | Education | 2014 |
| Hbfs Phuket Ltd | Arts & recreation | 2019 |
| HBH Trade Renovation Services Ltd | Construction | 2024 |
| HBK Property Ltd | Real estate | 2025 |
| Hbkm Events Cleaning Ltd | Administrative & support | 2022 |
| HBR - Hybrid Battery Reconditioning Ltd | Wholesale & retail | 2024 |
| HBR Housing Ltd | Real estate | 2025 |
| HBS Apartments Ltd | Hospitality | 2018 |
| HBS Consulting Ltd | Information & communication | 2019 |
| Hbsfirstlinemotors Ltd | Wholesale & retail | 2026 |
| HBW Chesterfield Limited | Real estate | 2025 |
| HC Alloys Ltd | Manufacturing | 2024 |
| HC Holdings 2026 Ltd | Financial services | 2026 |
| HC Trustees Limited | Administrative & support | 2023 |
| HCB Experts Limited | Professional & scientific | 2012 |
| HCF (IFW) Limited | Financial services | 2023 |
| HCF (JRW) Limited | Financial services | 2023 |
| HCF (RJW) Ltd | Agriculture & fishing | 2021 |
| HCF Demco IFW Limited | Financial services | 2024 |
| HCF MRW Limited | Financial services | 2024 |
| HCG UK Holdings Ltd | Financial services | 2026 |
| HCH Consultancy Limited | Information & communication | 2010 |
| Hcjc Limited | Professional & scientific | 2025 |
| HCK Ltd | Real estate | 2026 |
| HCL Investment Consulting Limited | Professional & scientific | 2017 |
| HCL Management Ltd | Real estate | 2021 |
| Hcml (Holdings) Limited | Professional & scientific | 1969 |
| HCO3 Limited | Financial services | 2024 |
| HCP Connect Limited | Wholesale & retail | 2019 |
| Hcps Midlands Ltd | Construction | 2026 |
| Hcrads Ltd | Health & social care | 2024 |
| Hcrsp International Ltd | Other services | 2024 |
| Hcrsp Limited | Agriculture & fishing | 2014 |
| HCS Fire Consultancy Ltd | Professional & scientific | 2023 |
| HCS Global Corp Ltd | Hospitality | 2019 |
| HD Administrators LLP | | 2006 |
| HD Cargo Ltd | Transport & logistics | 2022 |
| HD Cleaning Supplies Ltd | Wholesale & retail | 2022 |
| HD Derby Ltd | Wholesale & retail | 2017 |
| HD Dhillon Properties Limited | Real estate | 2026 |
| HD Exterior Cleaning Limited | Administrative & support | 2022 |
| HD Global Wellness Limited | Health & social care | 2023 |
| HD IT Solutions Ltd | Information & communication | 2015 |
| HD Lines Ltd | Construction | 2025 |
| HD Newcastle Ltd | Hospitality | 2023 |
| HD Payroll Ltd | Administrative & support | 2020 |
| HD Prestige Valeting Ltd | Administrative & support | 2021 |
| HD Properties (Nottingham) Limited | Real estate | 2015 |
| HD Ramsden Investments Limited | Financial services | 2025 |
| HD Roof Cleaning Ltd | Administrative & support | 2024 |
| HD Rotherham Ltd | Hospitality | 2024 |
| HD Windows & Gutters Limited | Administrative & support | 2020 |
| HD Wraps UK Ltd | Extraterritorial | 2018 |
| HDD Abingdon Limited | Construction | 2023 |
| HDD Banbury Limited | Construction | 2019 |
| HDD Buxton Limited | Construction | 2019 |
| HDD Buxton Retail Limited | Construction | 2019 |
| HDD Cranbrook Limited | Construction | 2019 |
| HDD Cranbrook Retail Limited | Construction | 2019 |
| HDD Daventry Limited | Construction | 2024 |
| HDD Group Limited | Construction | 2015 |
| HDD Hethersett Limited | Construction | 2021 |
| HDD Hinckley Limited | Construction | 2021 |
| HDD Leighton Buzzard Limited | Construction | 2017 |
| HDD Lichfield ST Johns Ltd | Construction | 2017 |