| Grzegorz Services Ltd | Construction | 2025 |
| GS2 Partnership Limited | Administrative & support | 2022 |
| GSF Stairs Ltd | Construction | 2023 |
| GSI Accounts Limited | Professional & scientific | 2006 |
| GSK Flooring Ltd | Construction | 2022 |
| GSP Constructions PVT Ltd | Other services | 2017 |
| Gsrg Holdings Limited | Financial services | 2014 |
| GSU (Borehamwood) Limited | Manufacturing | 1960 |
| GTK (Holdco) Limited | Wholesale & retail | 2013 |
| GTK Limited | Extraterritorial | 2015 |
| GTS Logistik Ltd | Transport & logistics | 2021 |
| GTX Europe Limited | Information & communication | 1987 |
| GU Solutions Limited | Construction | 2005 |
| Guarded Web Ltd | Wholesale & retail | 2022 |
| Guardian Ltd | Real estate | 2003 |
| Guildford Health Limited | Health & social care | 2017 |
| Gulls Reach Limited | Hospitality | 2022 |
| Gurung Properties Ltd | Real estate | 2017 |
| GV Health & Fitness Ltd | Health & social care | 2019 |
| GV Holdings Ltd | Financial services | 2021 |
| GV Properties Ltd | Real estate | 2020 |
| GVA Search Ltd | Administrative & support | 2020 |
| GVF Consulting Services Ltd | Information & communication | 2023 |
| Gvtlabs Limited | Information & communication | 2023 |
| GW Infratech Ltd | Information & communication | 2017 |
| Gwgm Ltd | Financial services | 2026 |
| Gwynne Dental Limited | Health & social care | 2018 |
| GXS Consulting Limited | Professional & scientific | 2023 |
| H H S Estates Limited | Hospitality | 1995 |
| H L & W FM Limited | Professional & scientific | 2021 |
| H N Rice Limited | Professional & scientific | 2017 |
| H W Landscaping and Garden Maintenance Ltd | Administrative & support | 2021 |
| H&F Consulting Ltd | Information & communication | 2023 |
| H&T London Limited | Wholesale & retail | 2024 |
| H. W. Group Ltd. | Health & social care | 1993 |
| H2 4HOME Limited | Professional & scientific | 2021 |
| H202U Limited | Extraterritorial | 1999 |
| H2S Properties Ltd | Real estate | 2023 |
| Haadiya Enterprises Ltd | Hospitality | 2026 |
| Habitage Limited | Real estate | 2024 |
| Habitage Mortgages Limited | Financial services | 2025 |
| Habitech Limited | Wholesale & retail | 2006 |
| Hackwood BS Holdings Limited | Financial services | 2023 |
| Hackwood Building Services Limited | Construction | 1999 |
| Hackwood Partners Limited | Professional & scientific | 2021 |
| Hackwood Print & Mailing Solutions Limited | Administrative & support | 2002 |
| Hackwood Properties Ltd | Extraterritorial | 2023 |
| Hackwood Property Holdings Limited | Real estate | 2023 |
| Hackwood Sawmills Management Limited | Households | 2024 |
| Hacy Properties Ltd | Real estate | 2024 |
| HAD & HEZ Ltd | Wholesale & retail | 2018 |
| Hadrian's Fence Ltd | Construction | 2015 |
| Hair Art by Andrea Ltd | Other services | 2026 |
| Hair Beauty Limited | Other services | 2003 |
| Hair by Hannah Marcia Ltd | Other services | 2022 |
| Hair of the Dog Woodley Limited | Professional & scientific | 2012 |
| Hairven’S Touch Ltd | Wholesale & retail | 2025 |
| Halip Transport Ltd | Transport & logistics | 2025 |
| Halo Medical Group Limited | Health & social care | 2023 |
| Halo Vitality Ltd | Health & social care | 2025 |
| Hama (UK) Ltd | Wholesale & retail | 1990 |
| Hamala Professional Services Limited | Professional & scientific | 2013 |
| Hamech Group Limited | Financial services | 1989 |
| Hamech Holding Company Limited | Manufacturing | 1976 |
| Hamech Limited | Manufacturing | 1973 |
| Hammer Consolidated Holdings Ltd | Administrative & support | 2004 |
| Hammer Distribution Limited | Information & communication | 1991 |
| Hammer Group Limited | Information & communication | 1999 |
| Hammersmith Consultancy Limited | Professional & scientific | 2026 |
| Hammersmith Heat Pumps Ltd | Wholesale & retail | 2021 |
| Hammond Electronics Limited | Wholesale & retail | 1984 |
| HAMPER4U Limited | Wholesale & retail | 2026 |
| Hamps Roofing Ltd | Transport & logistics | 2019 |
| Hampshire Anaesthesia Partnership LLP | | 2014 |
| Hampshire Body Imaging Ltd | Health & social care | 2019 |
| Hampshire Diagnostics Ltd | Health & social care | 2019 |
| Hampshire Electrical Services Limited | Professional & scientific | 2005 |
| Hampshire Entrance Systems Ltd | Manufacturing | 2025 |
| Hampshire FA Foundation | Arts & recreation | 2005 |
| Hampshire FA Leisure Operations Ltd | Arts & recreation | 2018 |
| Hampshire Facial Aesthetics Ltd | Other services | 2023 |
| Hampshire Fine Joinery Limited | Construction | 2017 |
| Hampshire Fire Safety Services Ltd | Construction | 2023 |
| Hampshire Football Association Limited | Arts & recreation | 2000 |
| Hampshire Halo Hair Design Limited | Other services | 2011 |
| Hampshire Healthcare Services Ltd | Administrative & support | 2015 |
| Hampshire Hospitals Contract Services Limited | Health & social care | 2013 |
| Hampshire Models Ltd | Wholesale & retail | 2015 |
| Hampshire Modern Quilt Guild Limited | Other services | 2018 |
| Hampshire Montana Limited | Financial services | 2018 |
| Hampshire Nest Renovations Ltd | Construction | 2026 |
| Hampshire Performance Cars Ltd | Wholesale & retail | 2025 |
| Hampshire Radiology Ltd | Health & social care | 2019 |
| Hampshire School of Music and Drama Ltd | Education | 2025 |
| Hampshire Spray Coatings Ltd | Construction | 2026 |
| Hampshire Training Providers Limited | Administrative & support | 1997 |
| Hampton Petroleum Development Limited | Mining & quarrying | 2003 |
| Hamro Ghar Management Limited | Real estate | 2020 |
| Hamro Niwas Ltd | Real estate | 2024 |
| Hamro Sansar Ltd | Health & social care | 2019 |