| Gdgsolutions Limited | London | 2025 |
| Gdms Engineering Ltd. | Westhill | 2007 |
| Gecos Design Ltd | Alford | 2018 |
| GED Wylie Associates Limited | Maidenhead | 2005 |
| Geistbox Limited | London | 2026 |
| GEM Diamonds Investments Limited | London | 2008 |
| GEM1NI Limited | Chelmsford | 2020 |
| Gemfields Limited | London | 2004 |
| Gemfields Services Limited | London | 2017 |
| Gemholds Ethiopia Limited | London | 2014 |
| Gemini Salt Extraction Ltd | Manchester | 2026 |
| Gemlock Limited | Burntisland | 2015 |
| GEMOLOGY1 Ltd | Cardiff | 2021 |
| Gems International (UK) Limited | Romford | 2021 |
| Gemsco Limited | Norwich | 2008 |
| Gemstone Aggregates Limited | Eldernell Coates | 1991 |
| Gemxor Overseas Ltd | London | 2023 |
| Genel Energy Block 54 Oman Limited | London | 2024 |
| Genel Energy Morocco Limited | London | 2011 |
| Genel Energy Petroleum Services Limited | London | 2013 |
| Genel Energy Qara Dagh Limited | London | 2018 |
| Genel Energy Sarta Limited | London | 2018 |
| Genel Energy Somaliland Limited | London | 2012 |
| General Hydrocarbons International Ltd | London | 2025 |
| Generation Minerals Ltd | Truro | 2012 |
| Generation Resources PLC | Truro | 2021 |
| Genesis Geology Limited | Dover | 2021 |
| Genesisoilandgasfielddevelopment Ltd | London | 2014 |
| Genesox Limited | Wigan | 2025 |
| Genetic Diagnostics and Therapy 21 Ltd | London | 2017 |
| Gent Fairhead Aggregates Limited | Herefordshire | 1990 |
| Genus Scotland Ltd | Peterhead | 2015 |
| GEO Aggregates Ltd | Leeds | 2015 |
| GEO Exploration Ltd | London | 2022 |
| GEO Pave Limited | Leeds | 2018 |
| GEO Poultry Grit Ltd | Omagh | 2012 |
| GEO Quarries (Little Ponton) Ltd | Leeds | 2015 |
| GEO Quarries Management Ltd | Leeds | 2019 |
| GEO Support Services Ltd | Sutton-In-Ashfield | 2020 |
| Geo-Energy Consultancy Limited | Aberdeen | 2007 |
| Geo-Mech Dundee Ltd | Dundee | 2024 |
| Geo-Plant Ltd. | Airdrie | 2011 |
| Geoactive Limited | Aberdeen | 2009 |
| Geocardinal Engineering Services (UK) Limited | London | 2025 |
| Geochem Research Limited | Liverpool | 2006 |
| Geoclastica Ltd. | Coventry | 1998 |
| Geocubed Limited | Cornwall | 2020 |
| Geodata Limited | Dundee | 2025 |
| Geodex Consultants Ltd | Coventry | 2017 |
| Geodynamics (U.K.) Limited | Aberdeen | 2016 |
| Geoexpo Global Limited | London | 2025 |
| Geogical Ltd | Hartlepool | 2023 |
| Geoinsight Limited | Chesham | 2003 |
| Geolithical Limited | Bristol | 2023 |
| Geologic Solutions Ltd | Kent | 2007 |
| Geological Data Services Limited | Moira | 1994 |
| Geological Data Solutions Ltd | Larne | 2025 |
| Geomac Structural Analysis Limited | Dyce | 2023 |
| Geomaxo Ltd | Lancaster | 2023 |
| Geomec Engineering Ltd | London | 2014 |
| Geomite Minerals Limited | Dungannon | 2021 |
| Geomodelling Services Limited | Wimbledon | 1997 |
| Geomor Ltd | Elgin | 2019 |
| Geonex Limited | Coventry | 2026 |
| Geopartners Ghana Ltd | Nottingham | 2019 |
| Geopartners Ltd | Nottingham | 2009 |
| Geopendle Limited | Edinburgh | 2013 |
| Geoplacer Limited | Aberdeen | 2011 |
| Geoprobex Limited | Aberdeen | 2023 |
| Geoprovider Processing Ltd | Guildford | 2019 |
| Georayan Ltd | Cambridge | 2024 |
| George Crawford & SON Ltd | 30 Darling Street | 2006 |
| George Mactec Ltd | Ashington | 2020 |
| George Newman Plant Limited | Huntingdon | 2019 |
| George Peden Limited | Ballymena | 1975 |
| George Webster Ltd | Peterhead | 2024 |
| Georgian OIL and GAS Company Limited | South Anston | 1996 |
| Georgiatech Offshore Inspection Ltd | Glasgow | 2022 |
| Georgina Energy PLC | London | 2013 |
| Geosav Limited | Glasgow | 2017 |
| Geoscience Services Limited | Beccles | 2015 |
| Geoservices Ltd | Aberdeen | 2008 |
| Geoservices Maritime UK Limited | Aberdeen | 2024 |
| Geosine Synergy Resources UK. Ltd | Tonypandy | 2022 |
| Geoslate Ltd | Caernarfon | 2026 |
| Geospatial Research Ltd | Durham | 2004 |
| Geospiza Services Ltd | Tonbridge | 2024 |
| Geostokos (Ecosse) Limited | Alloa | 1999 |
| Geotech Construction Limited | Belfast | 2006 |
| Geotech London Limited | Coventry | 2007 |
| Geotechnical Mining Services Ltd | Cardiff | 2015 |
| Geothermal Green Ltd | London | 2025 |
| Geotrace Technologies Limited | Edinburgh | 2001 |
| Geovale Limited | Stoke On Trent | 2018 |
| Geowisdom Ltd | Moreton-In-Marsh | 2025 |
| Geowiz Consult Limited | Gr Yarmouth | 2019 |
| Gerdash Ltd | London | 2019 |
| German Jinshima International Chemical Co., Ltd | Cambridge | 2025 |
| German Loprun Group Ltd | West Midlands, England | 2025 |
| German Peratek Biochemical Co., Ltd. | Beckenham | 2025 |