| Green DIG Construction Ltd | Construction | 2018 |
| Green Gourmet Limited | Manufacturing | 1991 |
| Green JAM Limited | Professional & scientific | 2017 |
| Green Knight Studios Limited | Financial services | 2020 |
| Green Park Wind Park Limited | Energy | 1998 |
| Green Purpose Property Ltd | Construction | 2025 |
| Green Race Ltd. | Wholesale & retail | 2011 |
| Green Scout Global Ltd | Administrative & support | 2014 |
| Greenaway Architecture Limited | Professional & scientific | 2009 |
| Greenaway Design LLP | | 2023 |
| Greencode Sustainability Limited | Professional & scientific | 2021 |
| Greengate Technology Limited | Information & communication | 2006 |
| Greenshop Solar Limited | Wholesale & retail | 2004 |
| Greenstream Microsystems Ltd | Professional & scientific | 2023 |
| Greenteam Holdings Ltd | Professional & scientific | 2016 |
| Greg Howell Ltd | Arts & recreation | 2016 |
| Gregg Wootten Electrical Limited | Construction | 2017 |
| Gregstar Ltd | Professional & scientific | 2021 |
| Grid Connections Limited | Construction | 2024 |
| Grid Faeries Ltd | Construction | 2023 |
| Griffin Mill Antiques Emporium Limited | Real estate | 2004 |
| Grigshot Apartment Ltd | Households | 2021 |
| Grigshot Coach House Ltd | Households | 2020 |
| Grigshot Ltd | Wholesale & retail | 2022 |
| Grosvenor Corlett Bird Limited | Financial services | 2002 |
| Grosvenor Tax Practice Limited | Professional & scientific | 2011 |
| Grounded Services Ltd | Construction | 2023 |
| Grow-A-Shed Ltd | Manufacturing | 2023 |
| Growth Hackers Global Limited | Information & communication | 2016 |
| GSF Developments Limited | Wholesale & retail | 2016 |
| GT Autos Bisley (UK) Ltd | Wholesale & retail | 2014 |
| GT Matrix Limited | Education | 2013 |
| GTC Limited | Professional & scientific | 1991 |
| Gtechs Consulting Limited | Administrative & support | 2011 |
| Guardsman Engineering Limited | Manufacturing | 2015 |
| Gurukula Limited | Professional & scientific | 2017 |
| GUY Blanch BIO Development Limited | Professional & scientific | 2013 |
| GUY Welfare Associates Limited | Professional & scientific | 2011 |
| GV Scaffolding Ltd | Construction | 2023 |
| GWA Corporate Ltd | Professional & scientific | 2024 |
| Gwynnlets Limited | Real estate | 2024 |
| Gym for the Mind Ltd | Education | 2016 |
| H&D Barber Stroud Ltd | Other services | 2022 |
| H.L.S. Haulage Ltd | Transport & logistics | 2021 |
| H2OME Property Services Ltd | Hospitality | 2025 |
| Habibah Limited | Hospitality | 2020 |
| Habitus Insight Limited | Professional & scientific | 2015 |
| Haffenden Upholstery and Furniture Design Ltd | Manufacturing | 2018 |
| Hairware Limited | Wholesale & retail | 2009 |
| Halard Design Ltd | Professional & scientific | 2020 |
| Hales Grove Estate Limited | Information & communication | 2014 |
| Halona Barber Ltd | Other services | 2025 |
| Hamlet's Honey Farm Limited | Extraterritorial | 1995 |
| Hammock HR Group Limited | Professional & scientific | 2020 |
| Hampton Colours Limited | Manufacturing | 1974 |
| Hampton Electrical Systems Limited | Construction | 2000 |
| Hampton Equine Vets Ltd | Professional & scientific | 2023 |
| Hampton Joinery Ltd | Manufacturing | 2012 |
| Hamptongreen Finance Ltd | Information & communication | 2006 |
| Hamptons Bazaar Limited | Wholesale & retail | 2024 |
| Hand Made Holidays Limited | Information & communication | 1996 |
| Hands Will DO IT Ltd | Information & communication | 2023 |
| Handy Web Guide Limited | Extraterritorial | 1995 |
| Happy Cinnamon Artisan Bakery Ltd | Manufacturing | 2023 |
| Happy Paws & Ahmanetbullz Limited | Other services | 2019 |
| Harding Estates (Chimney) Limited | Extraterritorial | 2011 |
| Harding Estates Limited | Real estate | 1940 |
| Hardwood Windows and Doors Ltd | Construction | 2026 |
| Harrison Talbot Limited | Real estate | 2023 |
| HAT & Stick Limited | Hospitality | 2011 |
| Hawkes & M Limited | Professional & scientific | 2019 |
| Hawkins Consulting Ltd | Professional & scientific | 2016 |
| Hawkwood College Limited | Hospitality | 1958 |
| Hawley Residential Ltd | Real estate | 2025 |
| Hawthorn Press Limited | Information & communication | 2002 |
| Hayes Road 1961 Limited | Extraterritorial | 2014 |
| HD Technology and Consultancy Ltd | Information & communication | 2025 |
| Headx Limited | Manufacturing | 2022 |
| Health Wizard Ltd | Health & social care | 2023 |
| Healthnuts Ltd | Hospitality | 2024 |
| Heart of England Life Limited | Administrative & support | 2022 |
| Heartfelt Care Ltd | Other services | 2015 |
| Heartfelt Home Care Limited | Health & social care | 2017 |
| Heartshore Consulting Ltd | Professional & scientific | 2003 |
| Heath & Sons Building Company Limited | Construction | 2014 |
| Heavenly Windows and Conservatories Ltd | Construction | 2015 |
| Heber Group Limited | Financial services | 2018 |
| Heber Limited | Manufacturing | 1983 |
| Heck FEN Wind Park Limited | Energy | 2012 |
| Heelflip Records Ltd | Wholesale & retail | 2025 |
| Helen DI Tomaso Speech and Drama Limited | Education | 2023 |
| Helios Trust | Health & social care | 1996 |
| Hemingway & Hawkes Ltd | Professional & scientific | 2020 |
| Henleaze Roofing (Cornwall) Limited | Construction | 2025 |
| Herberts Home Ltd | Health & social care | 2026 |
| Hercules NDT Limited | Professional & scientific | 2025 |
| Hercules Propellers Limited | Manufacturing | 2015 |
| Here Before Records Limited | Information & communication | 2025 |
| Heritage Sash Windows Limited | Construction | 2021 |
| Hero Hypnotherapy Ltd | Health & social care | 2018 |