| Hannah Ramrachia Travel Counsellor Limited | Administrative & support | 2024 |
| Hannah Renee Ltd | Administrative & support | 2016 |
| Happy Bite Ltd | Health & social care | 2020 |
| Happy Hour Group Limited | Other services | 2018 |
| Happy House Books Limited | Information & communication | 2015 |
| Happy Living Ltd | Real estate | 2017 |
| Happy Projects Ltd | Real estate | 2025 |
| Happy Property Developments Limited | Real estate | 2017 |
| Happy Property Limited | Real estate | 2017 |
| Happy Travel Agency Co., Ltd | Administrative & support | 2025 |
| Happy Wynyard Ltd | Real estate | 2022 |
| Happydental Ltd | Health & social care | 2014 |
| Haridev Property Investor Limited | Real estate | 2019 |
| Harmony Decoration & Building Ltd | Construction | 2025 |
| Harold Sharp Limited | Professional & scientific | 2013 |
| Harper Baxter Limited | Wholesale & retail | 2018 |
| Harrison Media Limited | Information & communication | 2017 |
| Harrison Proserv Ltd | Information & communication | 2006 |
| Harshee Properties Ltd | Real estate | 2023 |
| Hartley Living Ltd | Real estate | 2020 |
| Hashbrown Properties Limited | Real estate | 2024 |
| Hasj Medic Ltd | Health & social care | 2023 |
| Hats Rentals Limited | Real estate | 2022 |
| Hattrell LLP | | 2007 |
| Haven IFA Limited | Other services | 2005 |
| Haven Modern Homes Ltd | Professional & scientific | 2022 |
| Havencroft Ltd | Real estate | 2022 |
| Hawker House Ltd | Administrative & support | 2020 |
| Hawkmont Consulting Limited | Administrative & support | 2017 |
| Hayley AJ Shepley Nail Artistry & Education Ltd | Education | 2025 |
| Haynes Investment Group Limited | Real estate | 2021 |
| Haynes Property Developments Limited | Real estate | 2020 |
| Haynes Property Holdings Limited | Real estate | 2020 |
| Hayselden Construction Limited | Administrative & support | 2013 |
| Hayward Brooke LLP | | 2020 |
| Haywood & Co LLP | | 2007 |
| Hazards Golf Limited | Wholesale & retail | 2026 |
| Hazel Diamond Ltd | Other services | 2010 |
| Hazem AI Ltd | Information & communication | 2026 |
| HB Acting Limited | Arts & recreation | 2023 |
| HBE Group Ltd | Construction | 2024 |
| HD FM Limited | Real estate | 2025 |
| HDS One Ltd | Professional & scientific | 2005 |
| Hdtvtest Ltd | Information & communication | 2010 |
| HE13 & RD55 Property Limited | Real estate | 2019 |
| Heachpark Limited | Professional & scientific | 1989 |
| Head Full of Dreams Ltd | Professional & scientific | 2018 |
| Health & Vision Limited | Administrative & support | 2010 |
| Health Concept Ltd | Professional & scientific | 2021 |
| Healthcare 92 Ltd | Professional & scientific | 2022 |
| Healthled Ltd | Professional & scientific | 2025 |
| Healthy Eating Revolution Limited | Wholesale & retail | 2015 |
| Heart Vitality Ltd | Health & social care | 2022 |
| Heartwise Medical Limited | Real estate | 2026 |
| Heat to Feet Ltd | Wholesale & retail | 2026 |
| Hegstrordinary Homes Ltd | Real estate | 2026 |
| HEJ Testing Limited | Construction | 2025 |
| Heldur Sports Limited | Arts & recreation | 2025 |
| Hello World Records Ltd | Arts & recreation | 2025 |
| Helme Jackson Limited | Administrative & support | 2014 |
| Helpful Home Ltd | Households | 2013 |
| Helping Palms Ltd | Health & social care | 2023 |
| Helya Bridal Ltd | Other services | 2025 |
| Henam Limited | Hospitality | 2020 |
| Henley Trading Limited | Real estate | 1996 |
| Hennessy Alternative Investments Limited | Financial services | 2025 |
| Hennessy Investment Group Limited | Financial services | 2025 |
| Hennessy Media Limited | Arts & recreation | 2026 |
| Henry's 4 U Ltd | Wholesale & retail | 2024 |
| Henry's R US Ltd | Wholesale & retail | 2024 |
| Henshall & Irvine Limited | Health & social care | 2019 |
| Herbert Murray Funeral Directors Ltd | Other services | 2017 |
| Herin Services Limited | Professional & scientific | 2022 |
| Hesketh & Clair Butchers Ltd | Wholesale & retail | 2019 |
| HEY HEY Vegetarian Cuisine Ltd | Hospitality | 2025 |
| HEY Scandi Ltd | Professional & scientific | 2025 |
| Heyaan Enterprise Limited | Wholesale & retail | 2018 |
| HGR Communications Ltd | Information & communication | 2020 |
| HHH4U Ltd | Real estate | 2024 |
| Hidden Lemon Limited | Hospitality | 2025 |
| Higginbottom Consulting Ltd | Financial services | 2011 |
| High Gates Limited | Professional & scientific | 1998 |
| High Peak Financial Planning Ltd | Professional & scientific | 2016 |
| High Performance Detailing Ltd | Wholesale & retail | 2025 |
| Highfield Engineering Services (Warrington) Limited | Professional & scientific | 1984 |
| Highgrove Estate Management Limited | Households | 2006 |
| Highpoint Partners Limited | Administrative & support | 2003 |
| Highthorne Management Company Limited | Households | 1992 |
| HIH Wise Ltd | Real estate | 2020 |
| Hillington Services Limited | Information & communication | 2023 |
| Hilton Yates Engineering Solutions Ltd | Construction | 2018 |
| Hineni Group Ltd | Wholesale & retail | 2023 |
| Hines Accountancy Ltd | Professional & scientific | 2021 |
| Hiperes Ltd | Information & communication | 2013 |
| Hippasus Consulting Services Ltd | Real estate | 2023 |
| Hirepoint Limited | Administrative & support | 1998 |
| Histology Equipment Services Ltd. | Manufacturing | 2012 |
| HIT the Bar Limited | Hospitality | 2016 |
| HITMAKERS4LIFE Entertainment Ltd | Information & communication | 2012 |
| Hiya Talent Limited | Information & communication | 2011 |