| GEM Software Limited | Information & communication | 2006 |
| Gemco News 'N' Food LLP | | 2020 |
| Gemini Design Limited | Professional & scientific | 2024 |
| Genas Properties Ltd | Real estate | 2022 |
| General Aero Equipment Limited | Administrative & support | 2009 |
| General Aero Services Limited | Manufacturing | 1993 |
| General Building Services (Essex) Ltd. | Construction | 2002 |
| Generator Power Systems Limited | Extraterritorial | 2009 |
| Gentorus Ltd | Financial services | 2025 |
| Gentorus.Clothing Ltd | Wholesale & retail | 2025 |
| George Harker and Company Limited | Wholesale & retail | 1898 |
| George Tanner (Holdings) Limited | Professional & scientific | 1987 |
| George Tanner (Shalford) Limited | Agriculture & fishing | 1987 |
| Geronimo Electrical Limited | Construction | 2012 |
| Gerrard Group Limited | Real estate | 2019 |
| Gesborough Limited | Other services | 2023 |
| GET Dotted Limited | Professional & scientific | 2000 |
| GET2SPORTSMARKET Limited | Wholesale & retail | 2023 |
| Getin Consultancy Ltd | Professional & scientific | 2025 |
| GFC Building Services Limited | Construction | 2019 |
| GG-223-912 Limited | Real estate | 2024 |
| GG-715-517 Limited | Real estate | 2021 |
| GH Strong Properties Ltd | Real estate | 2026 |
| Ghost Performance Limited | Wholesale & retail | 2022 |
| Ghostlight Limited | Information & communication | 2004 |
| GIH Construction Limited | Construction | 2023 |
| Gilcrush Developments Ltd | Construction | 2025 |
| Giles Bros Construction UK Ltd | Extraterritorial | 2022 |
| Gilgal Place Ltd | Real estate | 2024 |
| Gillian Scarlet Ltd | Professional & scientific | 2022 |
| Gina Hills Limited | Health & social care | 2021 |
| Girling Risk Assessment Limited | Professional & scientific | 2015 |
| Giswil Limited | Real estate | 2019 |
| Giving Europe Limited | Extraterritorial | 2010 |
| GJ Accountpharm Limited | Health & social care | 2006 |
| GJ Reinforcements Limited | Construction | 2012 |
| GJH Groundworks & Structures Ltd | Construction | 2022 |
| GKR Automotive Ltd | Wholesale & retail | 2025 |
| Gladbrook Limited | Real estate | 1972 |
| Gladen SPV Limited | Real estate | 2024 |
| Glasslight Consultancy Limited | Professional & scientific | 2025 |
| Glasslight FM Limited | Administrative & support | 2025 |
| Glasslight Holdings Limited | Financial services | 2025 |
| Glasswing Technology Limited | Information & communication | 2024 |
| Glebe IT Services Ltd | Information & communication | 2024 |
| Glen Farrow | | 1987 |
| Gleneagles Maintenance Company Limited | Construction | 2024 |
| Glenn.The.Reader Limited | Manufacturing | 2016 |
| Glimpse Commerce Limited | Administrative & support | 2025 |
| GLM (Estates) Ltd | Real estate | 2021 |
| Global Freight Systems Limited | Transport & logistics | 2006 |
| Global H&S Limited | Professional & scientific | 2014 |
| Global Maintenance Technologies Limited | Professional & scientific | 1997 |
| Global Prostate Solutions (India) Ltd | Health & social care | 2024 |
| Global Prostate Solutions Ltd | Health & social care | 2012 |
| Global Realtime Captioning LLP | | 2016 |
| Global Resale, Ltd | Extraterritorial | 2023 |
| Globalstrat Ltd | Administrative & support | 2015 |
| Globegold Limited | Real estate | 2012 |
| Glow and Go Events Ltd | Other services | 2025 |
| Glow and Go Team Ltd | Other services | 2022 |
| Glow by AGA Ltd | Health & social care | 2021 |
| Glowing Results LLP | | 2015 |
| Glutz UK Limited | Wholesale & retail | 1999 |
| GM Automotive & Performance Ltd | Wholesale & retail | 2021 |
| Gmbd Ltd | Real estate | 2018 |
| GMK Brown Properties Limited | Real estate | 2017 |
| GNC Research Labs Limited | Manufacturing | 2026 |
| Go Construction Services Ltd | Construction | 2005 |
| Go Swish Ltd | Manufacturing | 2022 |
| Gold Alex Media Ltd | Information & communication | 2025 |
| Golden Fleece Public House Ltd | Hospitality | 2013 |
| Golden Remedy Ltd | Manufacturing | 2026 |
| Golden Scissors 1 Ltd | Other services | 2023 |
| Goldenfrybraintree Ltd | Hospitality | 2023 |
| Goldfinches Consulting Limited | Professional & scientific | 2026 |
| Gomi Connect Ltd | Information & communication | 2025 |
| Gomms Ltd | Wholesale & retail | 2022 |
| Gone Till Clear Limited | Wholesale & retail | 2022 |
| Gonex Ltd | Real estate | 2024 |
| Good for the Money Limited | Financial services | 2026 |
| Good Life Care Limited | Health & social care | 2017 |
| Goodin's Enterprises Ltd | Other services | 2020 |
| Gordon Place (Braintree) Management Limited | Households | 2022 |
| Gorjess Jewellery Limited | Manufacturing | 2014 |
| Gosfield Financial Ltd | Financial services | 2018 |
| Gosfield Rentals Ltd | Real estate | 2024 |
| GOT YOU in Events Limited | Wholesale & retail | 2009 |
| Gozirim Foods Ltd | Wholesale & retail | 2026 |
| GP Construction Limited | Construction | 2003 |
| GP Utilities Limited | Water & waste | 2012 |
| Grace at Work IT Consulting Ltd | Information & communication | 2014 |
| Grace at Work Property Ltd | Real estate | 2025 |
| Gracie Associates Limited | Professional & scientific | 2014 |
| Graham Braddick Partnership Limited | Professional & scientific | 1989 |
| Grain Camera Co. Limited | Administrative & support | 2017 |
| Graljo Limited | Extraterritorial | 2022 |
| Gramaniek Housing Services Ltd | Real estate | 2025 |
| Gramaniek Services Ltd | Professional & scientific | 2022 |
| Grange Property Services Ltd | Real estate | 2005 |