| Glenmauric Limited | Real estate | 2025 |
| Glenmore (Frinton on Sea) Management Company Limited | Households | 2016 |
| Glenquin Consulting Ltd | Administrative & support | 2017 |
| Glenvest Limited | Financial services | 2026 |
| Glintgrove Limited | Other services | 1983 |
| Global Broadcast Talent Manifesto Ltd | Information & communication | 2023 |
| Global Green Ltd | Administrative & support | 2018 |
| Global Leaders Academy (UK) Limited | Professional & scientific | 2007 |
| Global Litigation Management Limited | Professional & scientific | 2009 |
| Global Machinery Services (SPC) Limited | Administrative & support | 2010 |
| Global Maintenance Group Limited | Administrative & support | 2026 |
| Global Motorcycle Training Limited | Administrative & support | 2025 |
| Global News Digital Media Ltd | Professional & scientific | 2023 |
| Global Park Estates Limited | Real estate | 2010 |
| Global Permitting Solutions Ltd | Water & waste | 2013 |
| Global Predictive Analytics Ltd | Professional & scientific | 2019 |
| Global Stone (Colchester) Ltd | Wholesale & retail | 2002 |
| Globalunipath Limited | Education | 2024 |
| Globewide Investments Ltd | Financial services | 2014 |
| Gloria and Rosemary Co Ltd | Real estate | 2025 |
| Gloria Property Sourcing Ltd | Administrative & support | 2025 |
| Glorious Properties PVT Ltd | Real estate | 2022 |
| Glory Bite Limited | Hospitality | 2024 |
| Glovers Gardening Services Ltd | Households | 2023 |
| Glow Bathrooms Ltd | Construction | 2026 |
| Glowinkowski International Limited | Professional & scientific | 1997 |
| GLP Deliveries Ltd | Transport & logistics | 2018 |
| GLP Productions Ltd | Extraterritorial | 2016 |
| GLR Solutions Limited | Professional & scientific | 2021 |
| Glyconics Limited | Manufacturing | 2013 |
| Glynda CIC | Information & communication | 2026 |
| GM Consult Care Ltd. | Health & social care | 2016 |
| GM Incorporated Ltd | Administrative & support | 2023 |
| GM Lighting Limited | Arts & recreation | 2009 |
| GM UK Consultants Ltd | Professional & scientific | 2021 |
| GMAD28 Ltd | Health & social care | 2019 |
| GMC Ipswich Limited | Real estate | 2009 |
| GML Abrasives Limited | Manufacturing | 2000 |
| GMP Plant Limited | Administrative & support | 2014 |
| GMP Projects Limited | Construction | 2020 |
| Gmpriority Pharma Ltd | Manufacturing | 2019 |
| Gmruhel Ltd | Wholesale & retail | 2025 |
| GN Surveys Ltd | Professional & scientific | 2019 |
| Go Bananas Colchester Limited | Arts & recreation | 2016 |
| Go Green Monkeys Limited | Extraterritorial | 2021 |
| Go Leisure Colchester Limited | Education | 2014 |
| Go Local Extra Stores Ltd | Wholesale & retail | 2025 |
| Go Padel UK Limited | Arts & recreation | 2017 |
| Go Personnel Solutions Ltd | Administrative & support | 2022 |
| Go to Resource Limited | Administrative & support | 2017 |
| GO4 Enterprises Community Interest Company | Health & social care | 2010 |
| Goaf Limited | Administrative & support | 2025 |
| Godden & Rudling Building Services Limited | Construction | 2002 |
| Godeva Technology R&D Ltd | Information & communication | 2025 |
| Godfirst Healthcare Ltd | Health & social care | 2016 |
| Godwin Close Management Ltd | Households | 2018 |
| Goed Ltd | Wholesale & retail | 2023 |
| Gohilgo Limited | Transport & logistics | 2025 |
| Gokeefe Financial Insights Ltd | Administrative & support | 2025 |
| Gold Brick Investments Limited | Real estate | 2019 |
| Gold Consulting Limited | Information & communication | 2024 |
| Gold Sails Limited | Manufacturing | 2016 |
| Gold Standard Vapes Ltd | Wholesale & retail | 2025 |
| Goldband Associates Ltd | Administrative & support | 2013 |
| Goldberg Associates Limited | Professional & scientific | 2006 |
| Goldcrest Nestors Ltd | Professional & scientific | 2021 |
| Goldealers Ltd | Wholesale & retail | 2011 |
| Golden Friends Ltd | Real estate | 2012 |
| Golden Touch Barbers Colchester Ltd | Other services | 2024 |
| Golden Triangle Group Limited | Real estate | 2006 |
| Golden WOK 2023 Ltd | Hospitality | 2023 |
| Golden World Business Limited | Transport & logistics | 2024 |
| Golden Years Home Care Ltd | Health & social care | 2025 |
| Goldencarz Ltd | Wholesale & retail | 2023 |
| Golding Audio Limited | Manufacturing | 1969 |
| Goldlay Square Management Company Limited | Households | 2018 |
| Goldman Digital Limited | Information & communication | 2023 |
| Goldman Management Limited | Real estate | 2016 |
| Goldreich Properties Limited | Real estate | 2014 |
| Golf Breaks 4 U Limited | Administrative & support | 2023 |
| Golf Tuition Holidays Limited | Hospitality | 2019 |
| Golinked Media Ltd | Professional & scientific | 2025 |
| GOM Consultancy Limited | Transport & logistics | 2026 |
| Gondolin Holdings Ltd | Real estate | 2025 |
| Gone Fishing (UK) Ltd | Administrative & support | 2010 |
| Gooch Beer Ltd | Wholesale & retail | 2026 |
| Good Afternoon Holdings Limited | Financial services | 2023 |
| Good Catch Casting Ltd | Arts & recreation | 2022 |
| Good Flavours Ltd | Wholesale & retail | 2019 |
| Good Traders Ltd | Wholesale & retail | 2020 |
| Goodbye Ltd | Information & communication | 2025 |
| Goodey Services Limited | Construction | 2016 |
| Goodger Healthcare Ltd | Health & social care | 2020 |
| Goodwin Jones Ltd | Professional & scientific | 2012 |
| Goodwin Road Edmonton (Block C) Management Company Limited | Real estate | 1990 |
| Goodwin Road, Edmonton (Block a) Management Company Limited | Real estate | 1990 |
| Goodwoods Installations Ltd | Construction | 2022 |
| Goodwoods Ltd | Wholesale & retail | 2022 |
| Goody Stores Ltd | Wholesale & retail | 2020 |
| Gooprobs Limited | Wholesale & retail | 2023 |