| Goose Agency Limited | Administrative & support | 2025 |
| Gopharma Limited | Health & social care | 2026 |
| Gordon & Farr Ltd | Administrative & support | 2024 |
| Gordon Flooring Solutions Limited | Construction | 2024 |
| Gordon Letts Limited | Professional & scientific | 1973 |
| Gorilla Engineering Ltd | Wholesale & retail | 2024 |
| Gosbecks Barbers Ltd | Other services | 2020 |
| Gosbecks Cars & Commercials Ltd | Wholesale & retail | 2024 |
| Gosbecks Road (Colchester) Management Company Limited | Real estate | 1990 |
| Gosbecks View Management Co Limited | Households | 2025 |
| Gosfield Management Company Limited | Households | 2022 |
| Gosh (Projects) Ltd | Wholesale & retail | 2011 |
| Gotask Ltd | Information & communication | 2025 |
| Gothard Management Limited | Households | 2022 |
| Gothic Spirit Limited | Manufacturing | 2013 |
| Gourmet Mushrooms Limited | Agriculture & fishing | 1996 |
| Gowen Ocean Sailmakers Limited | Professional & scientific | 1985 |
| Gower Holdco Ltd | Financial services | 2025 |
| Gowrie Devaraja Limited | Health & social care | 2026 |
| Goye Ltd | Health & social care | 2019 |
| GP CTS Ltd | Health & social care | 2014 |
| GP Pharmacies Limited | Health & social care | 1997 |
| GP Primary Choice Limited | Health & social care | 2013 |
| GPE Sales & Marketing Ltd | Construction | 2022 |
| GPL Electrical Services Limited | Construction | 2007 |
| GPO Holdings Limited | Financial services | 2026 |
| GPR Consultants Ltd | Administrative & support | 2019 |
| GPW Consulting Services Limited | Professional & scientific | 2017 |
| GR Barbering Ltd | Other services | 2023 |
| GR Property Developments Ltd | Construction | 2024 |
| Grabfit Limited | Wholesale & retail | 2025 |
| Gracagus Empire Properties Ltd | Real estate | 2023 |
| Grace & Lace Limited | Wholesale & retail | 2005 |
| Grace Natural Pet Foods Limited | Manufacturing | 2018 |
| Grace Stones Engineering Consultancy Ltd | Professional & scientific | 2026 |
| Grace Taverns Ltd | Hospitality | 2023 |
| Graceage Care Ltd | Health & social care | 2020 |
| Graceson Ltd | Health & social care | 2021 |
| Gracewood Housing Limited | Construction | 2013 |
| Grade a Productions Limited | Information & communication | 2013 |
| Graeme Beedham Consultancy Ltd | Professional & scientific | 2023 |
| Graflo Ltd | Professional & scientific | 2018 |
| Graft Collective Ltd | Professional & scientific | 2013 |
| Grafters Civils Ltd | Construction | 2025 |
| Grafters Labour Supply (Bedford) Ltd | Administrative & support | 2025 |
| Graham Richardson & SON Limited | Wholesale & retail | 2000 |
| Graincorp (Black Sea) Holdings UK Limited | Financial services | 2018 |
| Graincorp Europe (UK) Limited | Financial services | 2011 |
| Gramark Developments Ltd | Construction | 2023 |
| Gramsy Information Technology Services UK (Gits) Ltd | Real estate | 2009 |
| Granbelle Limited | Health & social care | 2021 |
| Grand & Langtry Management Limited | Households | 2002 |
| Grand & Langtry Right to Manage Company Limited | Households | 2013 |
| Grandma’S Oven Ltd | Manufacturing | 2025 |
| Grandpoint Students 1 Limited | Real estate | 2024 |
| Grange ARM IP Ltd | Professional & scientific | 2023 |
| Grange Mill (Abbey Lane) Management Limited | Households | 1988 |
| Grange Park Construction Ltd | Construction | 2023 |
| Granite Computer Solutions Limited | Information & communication | 2004 |
| Granite Computers Limited | Extraterritorial | 2008 |
| Granite Technologies Ltd | Extraterritorial | 2023 |
| Grantchester Court Management Company Limited | Households | 1988 |
| Grantham Court RTM Company Limited | Households | 2005 |
| Grantleys Electrical Limited | Wholesale & retail | 2005 |
| Grapevine Homes Limited | Real estate | 2017 |
| Graph EYE Ltd | Information & communication | 2026 |
| Graph Solutions Limited | Professional & scientific | 2022 |
| Graphic Machinery Sales Ltd | Manufacturing | 2016 |
| Graphic Sales Ltd | Wholesale & retail | 2020 |
| Grapple Flooring Limited | Construction | 2025 |
| Grasshopper Services (2009) Limited | Mining & quarrying | 2009 |
| Grassroot Support CIC | Arts & recreation | 2025 |
| Graves Motorsport Limited | Manufacturing | 2015 |
| Gravitex Limited | Construction | 2003 |
| Gravity Consulting Group Ltd | Administrative & support | 2026 |
| Gray Dawes Group Limited | Extraterritorial | 1996 |
| Gray Dawes Holdings Limited | Extraterritorial | 1988 |
| Gray Dawes Holidays Limited | Administrative & support | 1998 |
| Gray Dawes Travel Limited | Administrative & support | 1967 |
| Grays Farms Limited | Agriculture & fishing | 1955 |
| Grays PCN Ltd | Health & social care | 2025 |
| Grays Scaffolding Limited | Construction | 2003 |
| GRB Fibre Solutions Limited | Information & communication | 2012 |
| Greanstead Kebab Limited | Hospitality | 2025 |
| Great Bentley Pre-School Community Interest Company | Education | 2008 |
| Great Eastern Court Management Company Limited | Households | 2000 |
| Great Oaks Education Ltd | Education | 2017 |
| Great Pitchers Management Company Limited | Households | 2000 |
| Great TEY Management Company Limited | Real estate | 2020 |
| Great White Solutions Ltd | Construction | 2026 |
| Greek Oasis Ltd | Hospitality | 2025 |
| Green and Clean Maintenance Ltd | Administrative & support | 2010 |
| Green and Purple Ltd | Professional & scientific | 2010 |
| Green Anglia Limited | Administrative & support | 2011 |
| Green BEE Agresearch Limited | Agriculture & fishing | 2026 |
| Green Blade Travel Limited | Administrative & support | 2018 |
| Green Colchester Cleaning Limited | Administrative & support | 2019 |
| Green EPC Limited | Construction | 2025 |
| Green EYE Gardens Ltd | Administrative & support | 2019 |
| Green Farm Barns (Knapton) Limited | Real estate | 2008 |