| Havila Beauty Hub Limited | Health & social care | 2024 |
| Havilah Lawrence Ltd | Health & social care | 2025 |
| HAVIN16 Limited | Hospitality | 2026 |
| Hawa International Ltd | Wholesale & retail | 2023 |
| Hawak Facilities Ltd | Construction | 2026 |
| Hawk Haulage Ltd | Construction | 2018 |
| Hawksley Capital Partners (Fressingfield) Limited | Construction | 2022 |
| Hawksley Capital Partners Limited | Professional & scientific | 2015 |
| Hawler Cuts Ltd | Other services | 2021 |
| Hawraman Organic Limited | Hospitality | 2025 |
| Haxol Ltd | Financial services | 2024 |
| Hayat Property Limited | Real estate | 2023 |
| Hayatix Enterprises Ltd | Wholesale & retail | 2026 |
| Haychtee Traders Limited | Professional & scientific | 2018 |
| Hayden Builders Limited | Construction | 2012 |
| Hayden Homes and Investments Limited | Real estate | 2021 |
| Hayyu 360 Ltd | Professional & scientific | 2022 |
| Hazelstone Properties Ltd | Real estate | 2025 |
| Hazmorail Ltd | Professional & scientific | 2018 |
| HBS Professionals Limited | Information & communication | 2009 |
| HCM Exports Ltd | Real estate | 2016 |
| HD Civil Engineering Limited | Construction | 2026 |
| HD Construction Builders Ltd | Construction | 2016 |
| HD Holding Estate Ltd | Real estate | 2022 |
| HD Tech & Gadget Hub Ltd | Wholesale & retail | 2023 |
| HD Woodworks London Ltd | Manufacturing | 2026 |
| HDL Flooring Ltd | Construction | 2026 |
| HDY Group Limited | Construction | 2025 |
| HE Anderson Limited | Education | 2016 |
| Heads Hairstylist Ltd | Other services | 2015 |
| Headstart Pre-School & Day Nursery Ltd | Education | 2019 |
| Heal-U Medicare Limited | Information & communication | 2018 |
| Health IS Wealth by EVE CIC | Health & social care | 2023 |
| Health Kulture Ltd | Health & social care | 2015 |
| Health Smile With Oana Ltd | Health & social care | 2023 |
| Health Vault NG Ltd | Health & social care | 2025 |
| Health Vitality Limited | Health & social care | 2014 |
| Healthcare Skills Consultancy Limited | Administrative & support | 2025 |
| Healthedge Pharma Limited | Health & social care | 2024 |
| Healthyafrica Limited | Health & social care | 2000 |
| Heart 2 Heart Counselling Services Limited | Health & social care | 2026 |
| Heartcareuk Limited | Health & social care | 2022 |
| Hearthie Nutrition Ltd | Wholesale & retail | 2025 |
| Heath Cleaning Supplies Ltd | Wholesale & retail | 2021 |
| Heathway Beauty Limited | Administrative & support | 2021 |
| Heathway Beds & Furniture Ltd | Wholesale & retail | 2013 |
| Heathway Best Fish Bar Limited | Hospitality | 2019 |
| Heathway Meat and Fish Market Limited | Wholesale & retail | 2025 |
| Heathway Mobiles Limited | Other services | 2023 |
| Heathway Seafood Limited | Wholesale & retail | 2025 |
| Heathway YUM YUM Ltd | Hospitality | 2022 |
| Heating & Electrical Solutions Limited | Construction | 2016 |
| Heatx Solutions Limited | Construction | 2025 |
| Heauty LDN Ltd | Other services | 2023 |
| Heaven Beauty by J Ltd | Other services | 2024 |
| Heaven Funeral UK Limited | Financial services | 2024 |
| Heavenly Books Ltd | Wholesale & retail | 2019 |
| Heavenly Desserts Ltd | Hospitality | 2026 |
| Heavenrise Constructions Limited | Construction | 2025 |
| Heavyhitter.Co Limited | Information & communication | 2014 |
| Heays 360 Ltd | Administrative & support | 2023 |
| Hebence Services UK Limited | Administrative & support | 2022 |
| Hedingham Invest Ltd | Real estate | 2024 |
| Heldark Ltd | Information & communication | 2026 |
| Helen Childcare Ltd | Health & social care | 2018 |
| Helios MEP Ltd | Construction | 2026 |
| Hello Laundry Ltd | Other services | 2019 |
| Helpful Services Ltd | Other services | 2026 |
| Hencodify Care Limited | Health & social care | 2024 |
| Hencodify Tech Ltd | Information & communication | 2023 |
| Henrietta Jacy Ltd | Extraterritorial | 2022 |
| Henripetra Ltd | Real estate | 2023 |
| Henry ST. Michael Limited | Transport & logistics | 2012 |
| Henson Management Ltd | Administrative & support | 2009 |
| HER Collective Ltd | Information & communication | 2002 |
| Hera Recovery House Limited | Health & social care | 2025 |
| Herb Haven Ltd | Wholesale & retail | 2024 |
| Herbella Beauty Limited | Wholesale & retail | 2023 |
| Heritage Bowls Ltd | Hospitality | 2023 |
| Heritage Day Nursery Ltd | Education | 2007 |
| Heritage Resources Limited | Administrative & support | 2017 |
| Heritage Systems & Support Limited | Information & communication | 2009 |
| Hernikey Services Ltd | Health & social care | 2021 |
| Herpho Decoration & Builder Ltd | Construction | 2025 |
| Hertz Windows Ltd | Wholesale & retail | 2019 |
| Hestia Smart Home Ltd | Real estate | 2019 |
| Hetman Builders Ltd | Construction | 2024 |
| HG Cars Limited | Manufacturing | 2025 |
| HGM Wellness Ltd | Arts & recreation | 2024 |
| HGW Mechanical Limited | Construction | 2022 |
| HHS Associates Ltd | Professional & scientific | 2026 |
| HI Logistics Services Limited | Transport & logistics | 2021 |
| HI Tech Autos Limited | Wholesale & retail | 2013 |
| HI5 Solutions Limited | Wholesale & retail | 2016 |
| Hiari Beauty Academy Ltd | Other services | 2023 |
| Hidayet Limited | Wholesale & retail | 2025 |
| Hidl Limited | Construction | 2023 |
| High Risk Rigging Ltd | Construction | 2022 |
| High Street Bites Ltd | Hospitality | 2026 |
| High-Tech Ambience Refurbishment & Construction Ltd | Construction | 2015 |