| Hero Inns Limited | Hospitality | 2012 |
| Hero Wellness Ltd | Wholesale & retail | 2026 |
| Heroes Homecare Ltd | Health & social care | 2020 |
| Heron's Lake Holdings Limited | Real estate | 2025 |
| Heron’S Lake (Management Company) Limited | Households | 2024 |
| Hesap Limited | Information & communication | 2021 |
| Hespa Ltd | Education | 2025 |
| Hewardmills Holdings Limited | Financial services | 2022 |
| Hewish Holdings Limited | Real estate | 2023 |
| Hewwy Media House Ltd | Information & communication | 2025 |
| Hexa Group Holdings Limited | Financial services | 2018 |
| HEY Conscious Limited | Administrative & support | 2025 |
| Heya UK Limited | Hospitality | 2016 |
| Heywood Glynn Limited | Construction | 2011 |
| HF Consulting Ltd | Professional & scientific | 2022 |
| HFS Investments Limited | Real estate | 2026 |
| Hgford Ltd | Professional & scientific | 2025 |
| HGS Investments Ltd | Real estate | 2019 |
| HGV Drivers Ltd | Transport & logistics | 2023 |
| Hhdemo Ltd | Construction | 2019 |
| HHS Enterprises Ltd | Wholesale & retail | 2024 |
| Hi-Tech Composites Limited | Manufacturing | 2014 |
| Hi-Tech GRP Limited | Manufacturing | 2025 |
| HI5 OUT of School Club Ltd | Health & social care | 2010 |
| Hidayah Nursery Ltd | Education | 2026 |
| Hideout London Ltd | Other services | 2015 |
| High 101 Limited | Professional & scientific | 2024 |
| High Acres Ltd | Agriculture & fishing | 2018 |
| High Level Installations Ltd | Construction | 2023 |
| High Peak Care Ltd | Health & social care | 2021 |
| High Time Group Ltd | Information & communication | 2026 |
| High Wycombe Amateur Boxing Club Limited | Arts & recreation | 2007 |
| High Wycombe and District Model Aircraft Club Limited(The) | Arts & recreation | 1984 |
| High Wycombe Car Sales Limited | Wholesale & retail | 2022 |
| High Wycombe Chair Making Museum CIC | Arts & recreation | 2018 |
| High Wycombe Fitness House Ltd | Arts & recreation | 2025 |
| High Wycombe Judo Centre Limited(The) | Arts & recreation | 1984 |
| High Wycombe Model Engineering Club Limited | Other services | 2000 |
| High Wycombe MOT Centre Ltd | Wholesale & retail | 2023 |
| High Wycombe Music Activities Limited | Extraterritorial | 1995 |
| High Wycombe Shop Limited | Wholesale & retail | 2026 |
| High Wycombe Tattoo Removal Limited | Other services | 2015 |
| High Wycombe Taxis Limited | Transport & logistics | 2025 |
| High Wycombe Top Tyres Ltd | Wholesale & retail | 2026 |
| Highbond Limited | Professional & scientific | 2013 |
| Highend Furniture Limited | Wholesale & retail | 2015 |
| Highfield Projects Limited | Information & communication | 2009 |
| Highfields Electrical Limited | Professional & scientific | 2016 |
| Highford Design and Build Limited | Construction | 2014 |
| Highgrove Food Distribution Limited | Wholesale & retail | 1996 |
| Highgrove Properties Ltd | Real estate | 2012 |
| Highpoint Property Maintenance Ltd | Construction | 2025 |
| Hightech Motors Ltd | Wholesale & retail | 2024 |
| Highview Homes (Folkestone) Limited | Construction | 2016 |
| Highway Plates Ltd | Manufacturing | 2022 |
| Highwayman Rentals Ltd | Real estate | 2026 |
| Highworth Close Limited | Real estate | 2021 |
| Hilf Carriers Ltd | Transport & logistics | 2026 |
| Hill Contractors Ltd | Construction | 2026 |
| Hill House Residents (Freehold) Limited | Households | 2025 |
| Hillbottom Road Limited | Real estate | 2025 |
| Hillbottom Road Management Limited | Real estate | 2021 |
| Hillclimb Garage Ltd | Wholesale & retail | 2020 |
| Hillmans Home Solutions Ltd | Construction | 2016 |
| Hills House Stevenage Limited | Real estate | 2024 |
| Hillview Asset Management Ltd | Real estate | 2018 |
| Hillview Road Development Limited | Real estate | 2010 |
| Hillyard Embleton Limited | Administrative & support | 2017 |
| Hilmi Corporation Limited | Financial services | 2018 |
| Hilton Motors Ltd | Wholesale & retail | 2016 |
| Hiltons Tobacco Limited | Manufacturing | 1995 |
| Himegold Property Management Limited | Hospitality | 1999 |
| HIN Wong Trading Limited | Wholesale & retail | 2025 |
| Hina Corporation Ltd | Wholesale & retail | 2023 |
| Hinch Property Investments Ltd | Real estate | 2014 |
| Hiptac Consulting Limited | Information & communication | 2009 |
| Hiptac Limited | Professional & scientific | 2009 |
| Hiptac Services Limited | Information & communication | 2009 |
| Hiref UK Ltd | Construction | 2014 |
| HIS Appliances Ltd | Wholesale & retail | 2023 |
| Historic and Classic Aircraft Sales Limited | Manufacturing | 2017 |
| Hitchin Holdings Ltd | Financial services | 2026 |
| Hive Solutions Limited | Information & communication | 2001 |
| Hixham Consulting Services Limited | Professional & scientific | 2020 |
| HJ Shipping Limited | Transport & logistics | 2009 |
| HJA Build Ltd | Construction | 2025 |
| Hjkb Limited | Health & social care | 2010 |
| Hjrecoveries Ltd | Professional & scientific | 2026 |
| HK Accountax Ltd | Professional & scientific | 2015 |
| HK Garments & Suits Ltd | Wholesale & retail | 2024 |
| HK Imports Ltd | Wholesale & retail | 2026 |
| HK Property Investment Limited | Real estate | 2017 |
| HK Sapra Holdings Ltd | Professional & scientific | 2025 |
| HK Wheels Limited | Wholesale & retail | 2025 |
| HKH Autos Ltd | Wholesale & retail | 2026 |
| Hkssaif Ltd | Wholesale & retail | 2025 |
| Hlade Construction Ltd | Construction | 2024 |
| Hladini Consultancy Services Ltd | Information & communication | 2025 |
| HLR Properties Limited | Real estate | 2021 |
| HLS Installations Limited | Professional & scientific | 2007 |