| HIT ME Bagel Ltd | Hospitality | 2018 |
| Hitchin Management Solutions Limited | Construction | 2014 |
| Hitchin V.E. Limited | Other services | 2014 |
| Hive Electrical Limited | Construction | 2018 |
| Hive Fire & Security Limited | Construction | 2021 |
| Hive Occupational Health and Wellness Limited | Health & social care | 2010 |
| Hive Organisation Ltd | Administrative & support | 2022 |
| Hive Properties & Investments Ltd | Real estate | 2019 |
| Hive Thinking Limited | Professional & scientific | 2020 |
| Hivestone Investments Limited | Financial services | 2025 |
| Hizahcare Ltd | Health & social care | 2025 |
| HJ Build Limited | Construction | 2024 |
| HJ Capital Solutions Ltd | Professional & scientific | 2016 |
| HJ Pharma Consulting Ltd | Professional & scientific | 2025 |
| Hj&E Property Limited | Real estate | 2025 |
| HJA Consultancy Solutions Ltd | Administrative & support | 2020 |
| Hjco Services Ltd | Professional & scientific | 2026 |
| HJH Projects Ltd | Professional & scientific | 2025 |
| HJI Services Ltd | Professional & scientific | 2018 |
| Hjmc Limited | Professional & scientific | 2023 |
| Hjshealthcare Ltd | Health & social care | 2023 |
| HK 24 Management Limited | Hospitality | 2024 |
| HK Aesthetics & Beauty Ltd | Other services | 2023 |
| HK Insperon Eats Limited | Hospitality | 2026 |
| HK Sasa Limited | Wholesale & retail | 2025 |
| HK-2005 Limited | Health & social care | 2025 |
| Hker Mart Ltd | Wholesale & retail | 2024 |
| HKL Consulting Limited | Information & communication | 2016 |
| HKM Construction Services Ltd | Professional & scientific | 2018 |
| HKN 24/7 Services Limited | Administrative & support | 2024 |
| HKN Care Services Limited | Administrative & support | 2022 |
| HKN Properties Limited | Real estate | 2024 |
| Hknotts CIC | Health & social care | 2022 |
| HKR Group Ltd | Wholesale & retail | 2020 |
| HKS Medical Limited | Health & social care | 2016 |
| Hksp Limited | Real estate | 2025 |
| HKY Property Management Limited | Real estate | 2024 |
| HKZ Import and Exports Ltd | Wholesale & retail | 2024 |
| HKZ Transport Ltd | Transport & logistics | 2019 |
| HL Education Ltd | Information & communication | 2026 |
| HL Properties Limited | Real estate | 2023 |
| HLM Digital Consulting Limited | Information & communication | 2023 |
| HLP (UK) Limited | Professional & scientific | 2002 |
| Hlydang Ltd | Wholesale & retail | 2024 |
| HM Assessment Ltd | Professional & scientific | 2023 |
| HM Group Ventures Ltd | Financial services | 2026 |
| HM Media Marketing Ltd | Professional & scientific | 2025 |
| HMA Sports Limited | Wholesale & retail | 2025 |
| HMC Investments Limited | Other services | 2006 |
| Hmc&T Service Ltd. | Wholesale & retail | 2020 |
| HMF Logistics Limited | Transport & logistics | 2021 |
| HMK Property Services Ltd | Administrative & support | 2021 |
| HML Homes Limited | Real estate | 2024 |
| Hmla Properties Ltd | Real estate | 2024 |
| HMO Doctor Limited | Real estate | 2022 |
| HMO Furniture & BED Supplies Limited | Manufacturing | 2025 |
| HMO Mansfield Ltd | Real estate | 2016 |
| HMO Property Solutions Limited | Real estate | 2018 |
| HMO Refurbishments Nottingham Limited | Construction | 2022 |
| HMT Construction Ltd | Construction | 2026 |
| HMU Securities Ltd | Financial services | 2023 |
| HN Booze Ltd | Wholesale & retail | 2019 |
| HN Cleanmetrics Ltd | Transport & logistics | 2025 |
| HN Global Solutions Limited | Wholesale & retail | 2025 |
| HNA Property Ltd | Real estate | 2018 |
| HNI Motors Ltd | Wholesale & retail | 2012 |
| HNM Properties 110 Limited | Real estate | 2018 |
| HNV Investments Ltd | Real estate | 2010 |
| Hnzm Holdings Limited | Financial services | 2025 |
| HO TEG JAS Ltd | Administrative & support | 2025 |
| Hobak Connect Ltd | Transport & logistics | 2023 |
| Hobbs N&S Ltd | Professional & scientific | 2021 |
| Hobby Homes Limited | Professional & scientific | 2015 |
| Hobbymarts Ltd | Extraterritorial | 2025 |
| Hobbyspotz Retail Limited | Wholesale & retail | 2023 |
| Hobbyspotz UK Ltd | Wholesale & retail | 2021 |
| Hoby Road Limited | Construction | 2026 |
| Hockey Nonwovens Ltd | Wholesale & retail | 2023 |
| Hockley Cafe Ltd | Hospitality | 2019 |
| Hockley Developments (Bleasby) Limited | Construction | 2025 |
| Hockley Developments (Broad Street) Limited | Construction | 2025 |
| Hockley Developments (Burncross Road) Limited | Construction | 2025 |
| Hockley Developments (Denmark Road) Limited | Construction | 2025 |
| Hockley Developments (Derwent Crescent) Limited | Construction | 2025 |
| Hockley Developments (Foxwood and Embassy) Limited | Construction | 2023 |
| Hockley Developments (Henley Avenue) Limited | Construction | 2025 |
| Hockley Developments (Hucknall Road) Limited | Construction | 2022 |
| Hockley Developments (Kingsley Park Terrace) Limited | Construction | 2022 |
| Hockley Developments (Meadow Lane) Limited | Construction | 2025 |
| Hockley Developments (Murray Street) Limited | Construction | 2025 |
| Hockley Developments (Prinst) Limited | Construction | 2022 |
| Hockley Developments (Regent Street) Limited | Construction | 2024 |
| Hockley Developments (Sandygate Road) Limited | Construction | 2025 |
| Hockley Developments (Smith Crescent) Ltd | Construction | 2023 |
| Hockley Developments (Spondon Street) Limited | Construction | 2023 |
| Hockley Developments (the Bakersfield) Limited | Construction | 2022 |
| Hockley Developments (the Peacock) Ltd | Construction | 2024 |
| Hockley Developments (Thurgarton Street) Limited | Construction | 2024 |
| Hockley Developments (Victoria Street) Ltd | Construction | 2021 |
| Hockley Developments (Walker Close) Limited | Construction | 2025 |