| Hellenic Food Market (HFM) Ltd | Hospitality | 2016 |
| Helosh Limited | Hospitality | 2017 |
| Henna by Mans Ltd | Other services | 2025 |
| HER by HER Ltd | Wholesale & retail | 2021 |
| HER Pageantry Ltd | Arts & recreation | 2021 |
| Here’S Security Ltd | Administrative & support | 2025 |
| Herington House Property Limited | Real estate | 1972 |
| Heritage Garments Ltd | Manufacturing | 2025 |
| Hermes Pharma Limited | Manufacturing | 2018 |
| Herms Properties UK Ltd | Extraterritorial | 2024 |
| Hero Marketing Ltd | Professional & scientific | 2025 |
| Heronswood Property Investments Ltd | Real estate | 2025 |
| Hertford Heating & Plumbing Ltd | Construction | 2021 |
| Hertfordshire Meat Ltd | Wholesale & retail | 2024 |
| Hestia Sisters Properties Ltd | Real estate | 2022 |
| Hezekiah Limited | Real estate | 2024 |
| HF Daniels Properties Ltd | Real estate | 2018 |
| HGB Holdings Ltd | Professional & scientific | 2023 |
| HGV24 Ltd | Wholesale & retail | 2026 |
| HH Satti Consultants Limited | Professional & scientific | 2023 |
| HHK Restaurant Limited | Hospitality | 2019 |
| Hice Ltd | Construction | 2022 |
| Higgrigg Ltd | Construction | 2016 |
| High Definition Cleaning Services Limited | Other services | 2021 |
| High Scaffolding Limited | Construction | 2022 |
| Highlands (Phase 2) Apartment Management Company Limited | Households | 1995 |
| Hilal's Properties Ltd | Real estate | 2024 |
| Hilcrest Design Trustee Limited | Manufacturing | 2025 |
| Hill (Balsham Road) LLP | | 2019 |
| Hill (Croxley Green) LLP | | 2019 |
| Hill (Hardwick) LLP | | 2018 |
| Hill (Pound Lane) LLP | | 2013 |
| Hill (Willway Street) LLP | | 2020 |
| Hill Bespoke Limited | Construction | 2015 |
| Hill Commercial Investments Limited | Financial services | 2009 |
| Hill Developments Limited | Extraterritorial | 2008 |
| Hill Group Services Limited | Administrative & support | 2009 |
| Hill Holdings Limited | Financial services | 2001 |
| Hill Housing Limited | Extraterritorial | 2008 |
| Hill Investment Partnerships Limited | Construction | 2016 |
| Hill Marleigh (Phase 2) LLP | | 2017 |
| Hill Marleigh (Phase 3) LLP | | 2023 |
| Hill Marleigh LLP | | 2017 |
| Hill Partnerships (Central) Limited | Extraterritorial | 2008 |
| Hill Partnerships (Eastern) Limited | Extraterritorial | 2008 |
| Hill Partnerships (London) Limited | Extraterritorial | 2008 |
| Hill Partnerships (Northern) Limited | Extraterritorial | 2008 |
| Hill Partnerships (Southern) Limited | Extraterritorial | 2008 |
| Hill Partnerships (Western) Limited | Extraterritorial | 2003 |
| Hill Partnerships Limited | Construction | 1991 |
| Hill Placeholder Limited | Construction | 2026 |
| Hill Property Investments Limited | Real estate | 2008 |
| Hill Regen Limited | Construction | 2026 |
| Hill Regeneration Limited | Real estate | 2019 |
| Hill Residential (LCH 1) Limited | Professional & scientific | 2010 |
| Hill Residential (LCH 2) Limited | Professional & scientific | 2014 |
| Hill Residential (Little Chalfont 1) Limited | Construction | 2009 |
| Hill Residential (Little Chalfont 2) Limited | Construction | 2015 |
| Hill Residential (Solutions) Limited | Construction | 2011 |
| Hill Residential Developments Limited | Extraterritorial | 2008 |
| Hill Residential Limited | Real estate | 2001 |
| Hill Underwood LLP | | 2021 |
| Hills Packaging Ltd | Administrative & support | 2025 |
| Hills Partnerships Limited | Extraterritorial | 2008 |
| Hills Residential Limited | Extraterritorial | 2008 |
| Hinxton Land Limited | Extraterritorial | 2008 |
| Histon Road (Cambridge) Management Company Limited | Households | 2025 |
| Hive and BEE Limited | Hospitality | 2015 |
| HMG Physiotherapy Clinic Company Ltd | Health & social care | 2015 |
| Hobson's Fish & Chips Ltd | Hospitality | 2015 |
| Hocial Social Ltd | Professional & scientific | 2025 |
| HOK Homes Ltd | Construction | 2022 |
| Hola's Mechanic Ltd | Wholesale & retail | 2022 |
| Holiauma (UK) Ltd | Wholesale & retail | 2021 |
| Hollymead Square (Management) Company Limited | Households | 2023 |
| Holmer Green Kebab Limited | Hospitality | 2016 |
| Holmesdale Road Management Limited | Households | 2015 |
| Holt & Lark Limited | Construction | 2026 |
| Holy Storage Ltd | Transport & logistics | 2018 |
| Holyfield Limited | Financial services | 2023 |
| Home by Laura Ltd | Wholesale & retail | 2021 |
| Home Hill LLP | | 2020 |
| Home Key Property Management Ltd | Households | 2025 |
| Home Sweet Home (London) Limited | Other services | 2009 |
| Homeshore Property Maintenance Limited | Construction | 2018 |
| Homix Household Limited | Wholesale & retail | 2020 |
| Homonoia Limited | Wholesale & retail | 2018 |
| Hope Wellbeing Centre Ltd | Health & social care | 2020 |
| Hope-Wellbeing Homes Ltd | Health & social care | 2020 |
| Horan Consulting Limited | Administrative & support | 2017 |
| Horizon House Developments Limited | Financial services | 2025 |
| Horizon Nexus Consultants Ltd | Information & communication | 2024 |
| Horne Gardens Management Ltd | Households | 2026 |
| Hornsey Motor Services Hire Limited | Wholesale & retail | 2019 |
| Hornsey Motor Services Limited | Wholesale & retail | 2015 |
| Hot Coal Productions Limited | Hospitality | 2019 |
| Hotham Lake Media Limited | Information & communication | 2024 |
| Hotline Solutions Limited | Information & communication | 2018 |
| House Bits Ltd | Wholesale & retail | 2024 |
| House of Brows Training Academy Limited | Education | 2021 |