| Harvard Business School Publishing Europe Limited | Information & communication | 2010 |
| Harvest East International Limited | Real estate | 2019 |
| Harvest Nominees Ltd | Extraterritorial | 2003 |
| Hasefer Limited | Wholesale & retail | 2003 |
| Hashem Provides Ltd | Real estate | 2025 |
| Hashguche Ltd | Hospitality | 2014 |
| Hashim and Partners Limited | Professional & scientific | 2025 |
| Haslam Partners Ltd | Arts & recreation | 2023 |
| Hassessentials Ltd | Wholesale & retail | 2023 |
| Hatchcroft Limited | Extraterritorial | 1996 |
| Hatslocho Invest Ltd | Real estate | 2025 |
| Hatsluche Ltd | Wholesale & retail | 2022 |
| Hatzibur Ltd | Professional & scientific | 2021 |
| Hatzlocha Limited | Real estate | 2024 |
| Hatzlocho Properties Ltd | Real estate | 2007 |
| Hatzlucha Ltd | Real estate | 2019 |
| Hatzola Ambulance Service Limited | Health & social care | 2020 |
| Haussetts Ltd | Real estate | 2019 |
| Have FUN Good Luck Ltd | Professional & scientific | 2022 |
| Haven Homework and Gardens Limited | Construction | 2025 |
| Havenside Equity Limited | Extraterritorial | 2017 |
| Hawk's Motors Limited | Wholesale & retail | 2017 |
| Hawks Facility Management Ltd | Real estate | 2024 |
| Hawthorne Chemicals Limited | Wholesale & retail | 2026 |
| Haya Pharmaceuticals Ltd | Health & social care | 2025 |
| Hayati UK Distro Ltd | Wholesale & retail | 2025 |
| Hayden’S POP & Prop Shop Ltd | Wholesale & retail | 2022 |
| Hayes Engineering Inspections Ltd | Professional & scientific | 2026 |
| Hayfield Chatsworth Stone Limited | Professional & scientific | 2013 |
| Hayfield Supplies Limited | Wholesale & retail | 2024 |
| Hazan Property Ltd | Real estate | 2026 |
| Hazetimmis Limited | Real estate | 2019 |
| Hazlocho Limited | Real estate | 2020 |
| Hazville Ltd | Extraterritorial | 2008 |
| HBH Estates Ltd | Real estate | 2025 |
| HC Prime Logisticx Limited | Transport & logistics | 2026 |
| HCC Investment Solutions Limited | Financial services | 2019 |
| HCS Cleaning Services Ltd | Administrative & support | 2008 |
| HCS Hire Limited | Financial services | 2015 |
| HDN Holdings Limited | Financial services | 2023 |
| HDS Decorating Contractors Limited | Other services | 2020 |
| Headingley Park Ltd | Real estate | 2024 |
| Headline Events Ltd | Hospitality | 2024 |
| Headspace MCR Limited | Other services | 2024 |
| Headtohelp Limited | Health & social care | 2022 |
| Health & Pathology Services Ltd | Health & social care | 2014 |
| Health and Safety Workwear Limited | Wholesale & retail | 2017 |
| Healthmax Ltd | Health & social care | 2023 |
| Heapfield Limited | Real estate | 1995 |
| Heapworth Limited | Real estate | 1995 |
| Heartlea Care Ltd | Administrative & support | 2025 |
| Heat Vapes Ltd | Wholesale & retail | 2024 |
| Heatberg Limited | Real estate | 2025 |
| Heathcote&Co Events Ltd | Hospitality | 2016 |
| Heathercliffe Residential Holdings Limited | Financial services | 2019 |
| Heatherville Ltd | Extraterritorial | 2005 |
| Heathland Estate Limited | Real estate | 2017 |
| Heaton Estates M/C Ltd | Real estate | 2021 |
| Heaton Lodge Limited | Health & social care | 2005 |
| Heaven Childcare Ltd | Health & social care | 2026 |
| Heavenlee Homes Ltd | Real estate | 2024 |
| Hebb Allcare Ltd | Wholesale & retail | 2025 |
| Hedg Group Limited | Administrative & support | 2025 |
| Hedge Nominees 2 Ltd | Extraterritorial | 2019 |
| Heera Holdings Ltd | Extraterritorial | 2019 |
| Heichel Menachem Ltd | Health & social care | 2023 |
| Height Industries Ltd | Construction | 2020 |
| HEIGHT123 Ltd | Wholesale & retail | 2025 |
| Heim & Koch Ltd | Wholesale & retail | 2020 |
| Heimers Estates Ltd | Real estate | 2026 |
| Heiss Capital Limited | Financial services | 2025 |
| Helix Enterprises Ltd | Extraterritorial | 2004 |
| Helix Pharmacy Ltd | Health & social care | 2026 |
| Hell Fire TV Limited | Information & communication | 2019 |
| Helldritch Ltd | Information & communication | 2026 |
| Hellen’S Rock UK Limited | Other services | 2022 |
| Hello Clinic Ltd | Manufacturing | 2026 |
| Hello Fido Ltd | Professional & scientific | 2024 |
| Hello Kart Limited | Wholesale & retail | 2024 |
| Hello Manchester Limited | Wholesale & retail | 2025 |
| Hello Petal Ltd | Wholesale & retail | 2022 |
| Hello Productions Limited | Information & communication | 2022 |
| Hellosing Limited | Information & communication | 2021 |
| HELLUVA628 Ltd | Manufacturing | 2026 |
| Helmetz Estates Ltd | Real estate | 2025 |
| Helmetz Investments Limited | Real estate | 2005 |
| Help Nearby Limited | Information & communication | 2024 |
| Help Nearby Tax and Accounting Limited | Professional & scientific | 2024 |
| Helphomelessheroes Limited | Hospitality | 2018 |
| Helping Change Ltd | Financial services | 2020 |
| Helping Hands Together CIC | Health & social care | 2026 |
| Hemel Challenger Limited | Extraterritorial | 2022 |
| Hemsley House Limited | Hospitality | 1929 |
| HENDO1 Limited | Construction | 2024 |
| Henliven Limited | Professional & scientific | 2023 |
| Henry&Nomi Ltd | Real estate | 2023 |
| Heramb Global Services Ltd | Professional & scientific | 2025 |
| Herath Forecourt Services Limited | Wholesale & retail | 2020 |
| Herath Retail Management Ltd | Wholesale & retail | 2021 |
| Hergy Ltd | Real estate | 2026 |