| Gsll Ltd | Manufacturing | 2021 |
| GT Centre of Sport Ltd | Arts & recreation | 2010 |
| GT Centre Properties Limited | Real estate | 2024 |
| GTR Metal & Waste Recycling Limited | Water & waste | 2026 |
| GTR Villa Ltd | Information & communication | 2010 |
| Gudbooks Ltd | Professional & scientific | 2013 |
| Gurditta JI Developments Ltd | Construction | 2020 |
| Gurpreet SINGH6 Ltd | Construction | 2021 |
| H & W Catering Ltd | Hospitality | 2006 |
| H&I Sports Management Limited | Professional & scientific | 2024 |
| H&N Nails Limited | Other services | 2013 |
| H&W Catering (South West & Wales) Ltd | Hospitality | 2025 |
| H&W Holdings Ltd | Hospitality | 2025 |
| H.S. Thiara Ltd | Real estate | 2020 |
| H2O Heating Services Limited | Construction | 1995 |
| Hachensack Rail Limited | Construction | 2012 |
| Hairmistress Ltd | Other services | 2025 |
| Hairssential Studio Limited | Other services | 2025 |
| Haki B Construction Ltd | Construction | 2026 |
| Hakkd Ltd | Wholesale & retail | 2022 |
| Halcroft Ltd. | Wholesale & retail | 2014 |
| Halvey Engineering Ltd | Wholesale & retail | 2016 |
| Hamio Limited | Real estate | 2023 |
| Hammerline Ltd | Manufacturing | 2023 |
| Hamrohomes Limited | Real estate | 2025 |
| Hands Across the Ocean (U.K) Ltd | Wholesale & retail | 2019 |
| Hanish Limited | Wholesale & retail | 2023 |
| Hannah Bailey PR Ltd | Professional & scientific | 2016 |
| Happi Treasure Ltd | Other services | 2019 |
| Happy Hearts Care Ltd | Health & social care | 2025 |
| Harliv Property Services Ltd | Real estate | 2023 |
| Harmony Bridge Capital Limited | Professional & scientific | 2026 |
| Harmony Trading Limited | Professional & scientific | 2020 |
| Harper IT Solutions Ltd | Information & communication | 2016 |
| Harris Installation Services Ltd | Transport & logistics | 2003 |
| Hassan Care Limited | Health & social care | 2025 |
| Hassan Enterprises Limited | Real estate | 2004 |
| Hassle Free Services Limited | Administrative & support | 2020 |
| Hastati Consultants Ltd | Information & communication | 2018 |
| Haven Homes, Accommodation and Care Services Ltd | Health & social care | 2023 |
| Havens Gate Homes Limited | Real estate | 2023 |
| Havi Services Ltd | Construction | 2024 |
| Havilah Healthcare Group Ltd | Health & social care | 2025 |
| Havmoore Care Limited | Health & social care | 2024 |
| Haypoint Limited | Wholesale & retail | 2014 |
| Haywardthomas Ltd | Construction | 2021 |
| HC Svnt Dracones Ltd | Real estate | 2024 |
| Hdmura Ltd | Financial services | 2025 |
| Healthedge Limited | Real estate | 2006 |
| Healthnova Pharma Ltd | Wholesale & retail | 2022 |
| Healthy Drains Ltd | Construction | 2023 |
| Heart Rental Limited | Transport & logistics | 2016 |
| Heavenley Bakery Ltd | Manufacturing | 2021 |
| Hector Godwin Ltd | Real estate | 2019 |
| Hedeky Solutions Limited | Professional & scientific | 2019 |
| Hedge Logistics Limited | Transport & logistics | 2021 |
| Hekimoktay Care and Supplies Ltd | Wholesale & retail | 2019 |
| Helder & Co Ltd | Health & social care | 2018 |
| Helen's Properties Limited | Real estate | 2023 |
| Henderson Health Care Limited | Health & social care | 2019 |
| Henderson Medical Services Ltd | Health & social care | 2010 |
| Hendersons Group Ltd | Health & social care | 2025 |
| Henstevis Company Limited | Administrative & support | 2022 |
| Heritage Aluminium Direct Ltd | Manufacturing | 2020 |
| Heritage Contractors S.E. Limited | Construction | 2017 |
| Heritage Nepal Limited | Wholesale & retail | 2025 |
| Herrtt Investments Limited | Real estate | 2025 |
| Herrtt Limited | Information & communication | 2021 |
| HF Build Services Ltd | Construction | 2026 |
| HF Future Consultant Limited | Information & communication | 2025 |
| HGV Consultancy Ltd | Transport & logistics | 2017 |
| High Life Yacht Charter and Powerboat Training Ltd | Administrative & support | 2022 |
| Hill Glade Limited | Administrative & support | 2021 |
| Hillsview Limited | Public administration | 2020 |
| Himalaya Transport Ltd | Transport & logistics | 2018 |
| Hines Homes Ltd | Real estate | 2024 |
| Hineshospitality Ltd | Hospitality | 2025 |
| HIS & Hers Decorating Ltd | Construction | 2023 |
| HIS Grace Kitchen Ltd | Hospitality | 2019 |
| Hisen Healthcare Ltd | Other services | 2023 |
| HIU & Mechanical Services Ltd | Construction | 2022 |
| HJK Steel Engineering Limited | Construction | 2022 |
| HJM Handyman & Maintenance Limited | Construction | 2025 |
| HK Omni Ltd | Wholesale & retail | 2019 |
| HL Safeguarding Consultancy Ltd | Professional & scientific | 2025 |
| HM Designer Nails Ltd | Other services | 2025 |
| Hodgson Family Holdings Limited | Real estate | 2025 |
| Holar Initiatives Limited | Information & communication | 2014 |
| Holcam House Management Limited | Households | 2009 |
| Holdupchat Ltd | Information & communication | 2023 |
| Holistic Advice Ltd | Financial services | 2020 |
| Hollyjoaneliteaesthetics Limited | Other services | 2025 |
| Home Move Box Limited | Professional & scientific | 2009 |
| Homeland African Culinary Limited | Hospitality | 2025 |
| Honeybill Concepts Limited | Health & social care | 2012 |
| Honeybill Logistics Ltd | Transport & logistics | 2026 |
| Honeys Kitchen Catering and Events Management Ltd | Hospitality | 2025 |
| HOP! Creative Services Ltd | Professional & scientific | 2026 |
| Horizon Commercial Solutions Limited | Professional & scientific | 2008 |
| Horo Limited | Hospitality | 2026 |