| H & S GOK Ltd | Wholesale & retail | 2023 |
| H & V Insulation Supplies (Midlands) Limited | Construction | 2019 |
| H a Real Estate Limited | Real estate | 2023 |
| H and D Transport Limited | Transport & logistics | 2025 |
| H and H Worldwide Limited | Information & communication | 2021 |
| H C R Coachworks Limited | Wholesale & retail | 2025 |
| H Construction Group Ltd | Construction | 2021 |
| H Couriers Ltd | Transport & logistics | 2023 |
| H Davies Limited | Professional & scientific | 2018 |
| H F Nest Limited | Real estate | 2026 |
| H Healthcare Ltd | Health & social care | 2023 |
| H M J Construction Limited | Construction | 2024 |
| H P Consultants Limited | Administrative & support | 2006 |
| H R V Limited | Real estate | 2019 |
| H S Expert Ltd | Professional & scientific | 2021 |
| H S Mann SPV Limited | Real estate | 2019 |
| H Squarec FM Limited | Construction | 2024 |
| H&A Consultants Limited | Information & communication | 2019 |
| H&F Capital Partners Limited | Real estate | 2005 |
| H&F Scaffolding Ltd | Construction | 2021 |
| H&F Traders (UK) Limited | Extraterritorial | 2011 |
| H&H Driving School Limited | Education | 2009 |
| H&H Executive Services Ltd | Administrative & support | 2019 |
| H&H2068 Ltd | Other services | 2025 |
| H&M Property Management Ltd | Real estate | 2012 |
| H&M UK Ltd | Professional & scientific | 2009 |
| H&N Desserts Limited | Hospitality | 2026 |
| H&R Legal Services Ltd | Professional & scientific | 2025 |
| H&R Sidhu Transport Ltd | Transport & logistics | 2022 |
| H&S Property Refurbishment Ltd | Construction | 2026 |
| H&T Consultancy Ltd | Professional & scientific | 2021 |
| H&T UK Property Limited | Real estate | 2025 |
| H'Airs and Gracie's Ltd | Other services | 2016 |
| H.Haider Consultancy Limited | Information & communication | 2024 |
| H0MEPRODUCTS Limited | Wholesale & retail | 2026 |
| H13 Consulting Ltd | Information & communication | 2024 |
| H2 Marketplace UK Limited | Administrative & support | 2017 |
| H2H Global Ltd | Wholesale & retail | 2023 |
| H4 Group Site Services Ltd | Manufacturing | 2021 |
| HA Jeem Ltd. | Wholesale & retail | 2017 |
| HA THU DO Ltd | Wholesale & retail | 2021 |
| Ha&Co Ltd | Wholesale & retail | 2025 |
| HA55AN & Co Ltd | Transport & logistics | 2025 |
| Habesha Market Ltd | Wholesale & retail | 2020 |
| Habib & Son's Limited | Hospitality | 2025 |
| Habib PUR Limited | Real estate | 2026 |
| Habibi Vegan Ltd | Hospitality | 2019 |
| Habitan Group Ltd | Construction | 2021 |
| Habitan Heating Ltd | Construction | 2022 |
| Habzee UK Services Ltd | Real estate | 2024 |
| HAC Plumbing&Heating Ltd | Construction | 2025 |
| Hackney Life Ltd | Wholesale & retail | 2020 |
| Haddon Estates Limited | Real estate | 2026 |
| Hadi Motors Ltd | Wholesale & retail | 2019 |
| Hadiyah Hussain Limited | Wholesale & retail | 2025 |
| Hadleigh Hats Ltd | Wholesale & retail | 2006 |
| Haerd Limited | Information & communication | 2025 |
| HAI Chai Ltd | Wholesale & retail | 2023 |
| Haiabu Ltd | Wholesale & retail | 2024 |
| Haider Medicare Limited | Health & social care | 2024 |
| Hainault Hydrotherapy Ltd | Other services | 2013 |
| Hainault MOT Test Centre Limited | Wholesale & retail | 2009 |
| Hainault Works Motors Ltd | Wholesale & retail | 2019 |
| Haines & Warwick Safety Installations Limited | Manufacturing | 1992 |
| Hainstone Ltd | Real estate | 2014 |
| Hair and Beauty Essence Ltd | Other services | 2021 |
| Hair Art Studio Ltd | Wholesale & retail | 2019 |
| Hair by Ginika Limited | Other services | 2025 |
| Hair Flair Anywhere Ltd | Other services | 2025 |
| Hair Solutions Salon Ltd | Other services | 2024 |
| Hair&Co @ 207 Ltd | Other services | 2025 |
| HAIR1 Ltd | Other services | 2026 |
| HAIR@207 Academy Ltd | Education | 2025 |
| Hairbytee Group Limited | Wholesale & retail | 2026 |
| Hairforce 1 Training Academy Limited | Education | 2016 |
| Hairforce 1 Training CIC | Education | 2022 |
| HAIRFORCE1 Barbers Limited | Other services | 2023 |
| Hairluv Ltd | Other services | 2017 |
| Hairsentials Ltd | Other services | 2024 |
| Haji Barat ALI Limited | Real estate | 2024 |
| Hajia Bey’S Cuisine Ltd | Hospitality | 2024 |
| Hajra Investments Ltd | Wholesale & retail | 2026 |
| Hakscars Ltd | Wholesale & retail | 2025 |
| Halat KRD Ltd | Wholesale & retail | 2025 |
| Halaweb Ltd | Wholesale & retail | 2023 |
| Halcyon Day Films Ltd | Information & communication | 2012 |
| Halcyon Innovations Ltd | Health & social care | 2021 |
| Haley Lofts and Builders Ltd | Construction | 2026 |
| Halfway Sun Limited | Financial services | 2026 |
| Hallmark Sports Cars Limited | Wholesale & retail | 2004 |
| Halloumi UK Limited | Public administration | 2022 |
| Halo Motor Group Ltd | Wholesale & retail | 2025 |
| Halpin Mortgages Ltd | Financial services | 2022 |
| Halstead Capital Ltd | Real estate | 2016 |
| Hamerton Properties Limited | Construction | 1989 |
| Hamilton Construction (Essex) Ltd | Construction | 2016 |
| Hamiqa Solutions Limited | Other services | 2022 |
| Hamm Cabling Services Limited | Construction | 2021 |
| Hammer Cross Holdings 2025 Limited | Financial services | 2025 |
| Hammer Cross Holdings Limited | Financial services | 2024 |