| Gothic Storm Limited | Information & communication | 2013 |
| Goulding Swann Limited | Real estate | 2018 |
| Goygoy Talks Limited | Administrative & support | 2025 |
| GP Decorating Services Limited | Construction | 2018 |
| Grace Mclean Management Limited | Professional & scientific | 2022 |
| Gracia Limited | Wholesale & retail | 2015 |
| Graffham Consulting Ltd | Education | 2008 |
| Graham Rogers & Associates Limited | Other services | 2008 |
| Graham Urology Limited | Health & social care | 2012 |
| Grand Sand Ltd | Construction | 2021 |
| Grange Builders LLP | | 2009 |
| Grange Group Holdings Limited | Extraterritorial | 1988 |
| Grange Heights Management Co. Limited | Other services | 1983 |
| Grange Homes (Herts) Limited | Extraterritorial | 1988 |
| Grange Vehicles Ltd | Wholesale & retail | 2009 |
| Grange Walk Management Company Limited | Households | 1989 |
| Grannyslice Ltd | Manufacturing | 2023 |
| Grant Barnett Assets Ltd | Wholesale & retail | 2024 |
| Grant, Barnett Holdings Limited | Financial services | 2000 |
| Grant,Barnett & Company,Limited | Wholesale & retail | 1900 |
| Gray HR Solutions Ltd | Administrative & support | 2017 |
| Great Bridge Consult Ltd | Professional & scientific | 2025 |
| Great Dunmow Estates Limited | Real estate | 1998 |
| Great Dunmow Osteopathy & Health Ltd | Health & social care | 2024 |
| Great Value Websites Limited | Professional & scientific | 2023 |
| Greaves International Trading Limited | Financial services | 2022 |
| Green DOT Cafe Limited | Hospitality | 2023 |
| Green Gene Global Ltd | Professional & scientific | 2026 |
| Green INK Creative Services Limited | Arts & recreation | 1984 |
| Green Seed UK Consulting Ltd | Professional & scientific | 2009 |
| Green Tape Ltd | Administrative & support | 2015 |
| Greenglow Car Wash Ltd | Wholesale & retail | 2026 |
| Greenham Props Limited | Arts & recreation | 2015 |
| Greenhouse Project UK Ltd | Agriculture & fishing | 2025 |
| Greenside Landscapes Limited | Administrative & support | 2005 |
| Greenstar Consultancy Ltd | Hospitality | 2016 |
| Greenszn Golf Ltd | Wholesale & retail | 2025 |
| Greenvale Books Limited | Wholesale & retail | 2002 |
| Grey Traders Limited | Wholesale & retail | 2015 |
| Greyhound Sport Medicine Ltd | Professional & scientific | 2010 |
| Greythorn UK Ltd | Information & communication | 2017 |
| Griffin Quantity Surveying Services Limited | Construction | 2016 |
| Grin’S Language Services Limited | Professional & scientific | 2019 |
| Grip Roll Ltd | Wholesale & retail | 2025 |
| GRL Global Ltd | Other services | 1984 |
| Groupusedcarbuyer Ltd | Wholesale & retail | 2023 |
| Growfin Financial Services Ltd | Professional & scientific | 2021 |
| Growth Crew Ltd | Administrative & support | 2022 |
| Growth Engine Ltd | Professional & scientific | 2023 |
| Growth Hacks Consultancy Ltd | Professional & scientific | 2026 |
| Growth Life Group Limited | Professional & scientific | 2021 |
| Growthhub Investments Ltd | Real estate | 2022 |
| Growthhub.Site Limited | Professional & scientific | 2022 |
| GSI Technologies Ltd | Information & communication | 2008 |
| GSL Commissioning Ltd | Energy | 2019 |
| GSP Management Ltd | Other services | 2017 |
| Gtca Limited | Administrative & support | 2013 |
| Gtfo Policies Limited | Administrative & support | 2020 |
| GU Food Holdings Limited | Financial services | 2021 |
| GU Indulgent Foods Limited | Manufacturing | 2009 |
| GU Limited | Extraterritorial | 2003 |
| Gubb & Associates Limited | Professional & scientific | 2021 |
| Guide Your Mind Ltd | Health & social care | 2014 |
| Guild Holdings Ltd | Real estate | 2019 |
| Gunestoprak Ltd | Wholesale & retail | 2019 |
| Gunn Holdings Ltd | Real estate | 2021 |
| Gunn Property Services Ltd | Real estate | 2013 |
| GVL Energy Limited | Administrative & support | 2025 |
| GWH Homes Limited | Real estate | 2021 |
| Gxp-Capital Ltd | Financial services | 2025 |
| Gxpert Ltd | Professional & scientific | 2025 |
| Gym Iron Equipment Ltd | Arts & recreation | 2024 |
| Gyoury Specialist Cars Ltd | Wholesale & retail | 2024 |
| GZ Disputes Ltd | Administrative & support | 2025 |
| H & B Lettings Limited | Real estate | 2009 |
| H and B Refinishing Ltd | Construction | 2023 |
| H Club Charters Limited | Administrative & support | 2026 |
| H J S Limited | Other services | 2004 |
| H Peasgood & SON Limited | Extraterritorial | 2009 |
| H-Yu Ltd | Professional & scientific | 2023 |
| H.E. Handscomb Limited | Construction | 1946 |
| H2D4 Limited | Other services | 2004 |
| Haag-Streit UK Limited | Manufacturing | 1989 |
| Habondia Holdings Limited | Real estate | 2021 |
| Hackney Management Services (UK) Limited | Real estate | 2019 |
| Hadham Limited | Construction | 1992 |
| Hain Northern Limited | Real estate | 2025 |
| Hairy Bishop Ltd | Other services | 2025 |
| Hak's Properties Limited | Real estate | 2025 |
| Halfo Limited | Financial services | 2014 |
| Hall Build Limited | Construction | 2011 |
| Halliday Financial Services Limited | Financial services | 2005 |
| Halo Blossom Floral Design Ltd | Wholesale & retail | 2022 |
| Hampshire Meats Limited | Wholesale & retail | 2004 |
| Hamway Developments Limited | Administrative & support | 2025 |
| Hamway Homes Limited | Administrative & support | 2021 |
| Hand of Glory Limited | Manufacturing | 2012 |
| Hand Post Publishing Limited | Information & communication | 2024 |
| Handengravings Limited | Information & communication | 2014 |
| Handmade Kitchen Co (Essex) Limited | Construction | 2015 |