| GAP Recycling Ltd | Malpas | 2023 |
| GAP Urban Metals Recovery Limited | Gateshead | 2022 |
| Garage Asbestos Removal Limited | Glasgow | 2021 |
| Garage Trade Supplies Ltd | Kingswinford | 2012 |
| Garbage Grabbers Group Ltd | London | 2023 |
| Garbagio Waste Solutions Ltd | Willenhall | 2026 |
| Garden Care Ltd | Rayleigh | 2024 |
| Garden Graft Bridgend Cyfyngedig | Bridgend | 2023 |
| Garden Hippo Limited | Dundee | 2012 |
| Gardening Kings Waste Removal Services Limited | West Drayton | 2023 |
| Gardiners Reclaimed Building Materials Limited | Stoke-On-Trent | 2000 |
| Gardners Scrap & Salvage Limited | Buxton | 2013 |
| Garnet Road Aggregate Recycling Limited | Selby | 2011 |
| Garratt's Metals Limited | Nantwich | 2003 |
| Garstang Utilities Ltd | Preston | 2026 |
| Gartena Holdings Limited | London | 2016 |
| Garth Isaf Estates Limited | Rhondda Cynon Taff | 2020 |
| Gary Catton Haulage Limited | Denbigh | 1995 |
| GAS Cylinder Disposal and Recycling Limited | Lancaster | 2019 |
| GAS Cylinder Disposal Limited | Lancaster | 2019 |
| Gasifiq Limited | Waltham Abbey | 2026 |
| Gasify Limited | Altrincham | 2017 |
| Gaskells (Midlands) Limited | Bootle | 2015 |
| Gaskells (North West) Limited | Merseyside | 1995 |
| Gaskin Waste Recycling Limited | Goole | 2015 |
| Gatesby Limited | Flowton Road Elmsett | 1996 |
| Gateway Drainage Services Limited | Tilbury | 2019 |
| Gator Kleen Ltd | Cirencester | 2025 |
| Gatten Ltd | Bury St. Edmunds | 2024 |
| Gavin Brown Group Limited | Watford | 2025 |
| Gavin Griffiths Contracting Ltd | Swansea | 2013 |
| Gavin Griffiths Recycling Ltd | Swansea | 2005 |
| Gavin Smith Plumbing & Heating Ltd | Bewdley | 2020 |
| GAZ Asia Ltd | Kington | 2010 |
| Gazzella Earthworks Ltd | Barnsley | 2017 |
| GB Environmental Services Ltd | Kirkby In Ashfield | 2015 |
| GB Plumb- Glasgow South Ltd | Renfrew | 2025 |
| GB Recycling Group Limited | London | 1972 |
| GB Waste Services Limited | Finchley | 2025 |
| Gbappliances Limited | Kettering | 2014 |
| GBM Oakham Limited | Louth | 2024 |
| GBP Skips & Waste Ltd | Newport | 2019 |
| GBP Skips Ltd | Newport | 2024 |
| GBR Bells Ltd | Essex | 2019 |
| GBT Wigan Ltd | Manchester | 2021 |
| GBX Remediation Ltd | Scottish Borders | 2024 |
| Gcgl Limited | Carlisle | 2006 |
| Gcoil Limited | London | 2019 |
| GD Energy Services Ltd | Bristol | 2001 |
| Geci Waste Removal Ltd | London | 2026 |
| Gecko Hygiene Ltd | Newport | 2007 |
| Geda Logistics Limited | Nottingham | 2024 |
| GEE DEE Cleansing Limited | Hartlepool | 1994 |
| GEF Re-Cycling (Swansea) Ltd | Manchester | 2026 |
| Gekko Waste Management Ltd | Halifax | 2022 |
| GEL Laboratories UK Limited | London | 2014 |
| Geldof Recycling Ltd | South Cave | 2009 |
| GEM Drainage Limited | Southminster | 2018 |
| GEM Waste Management Ltd | London | 2026 |
| Gemchem ((Building Complinace Services) Limited | Cardiff | 2023 |
| Gemcliff Limited | Birkenhead | 1977 |
| Geminor UK Limited | Newcastle | 2012 |
| Geminor UK Tenders Limited | Newcastle | 2026 |
| Geminor Waste Treatment UK Limited | Newcastle | 2019 |
| Gemiuk Ltd | Newcastle | 2025 |
| Gemtech (East Anglia) Ltd. | London | 2020 |
| GEN Brothers Company Ltd | London | 2026 |
| Gen&Co Limited | Bathgate | 2019 |
| Gen-Engineering Limited | London | 2012 |
| GEN4 Drainage Ltd | Peterborough | 2024 |
| Genan Limited | Warwick | 2008 |
| Genco Water Ltd | King'S Lynn | 2019 |
| Geneco (South West) Limited | Bath | 2014 |
| Geneco Limited | Bath | 2009 |
| General Business Consultants Limited | Southend-On-Sea | 1991 |
| General Demolition Limited | Ascot | 2003 |
| General Waste Limited | Croydon | 2016 |
| General Waters (U.K.) Limited | Blackwood | 1991 |
| Generation Local Limited | Ottery St. Mary | 2012 |
| Generation Metals Ltd | Waterlooville | 2024 |
| Generations Recyclers Ltd | Kettering | 2019 |
| Genesis Clearance Ltd | Walsall | 2025 |
| Genesis Recycling Group Ltd | Trimdon Station | 2019 |
| Genesis Reprocessing Ltd | Haywards Heath | 2024 |
| Genius Waste Ltd | Dagenham | 2020 |
| Gent Group Ltd. | Doune | 2018 |
| Genuine Accessories Ltd | Ruislip | 2008 |
| Genus Consultancy Limited | Bury | 2022 |
| Genus Recycling Limited | Bury | 2020 |
| Genus Trading Limited | Bury | 2004 |
| Genwaste Limited | Brierley Hill | 2019 |
| GEO Pollution Technologies (UK) Limited | Pyle | 2003 |
| Geo-Environmental Investigations Limited | London | 2004 |
| GEO. E. Richardson & Sons Limited | Sussex | 1958 |
| GEO3 Recycling Ltd | Blackpool | 2017 |
| Geocycle UK Limited | Coalville | 1988 |
| Geoffrey Group North West Ltd | Newton-Le-Willows | 2019 |
| Geoffrey Ripley & SON BUS & Coach Sales Ltd | Barnsley | 2007 |
| Geopure Group Ltd | Craigavon | 2020 |
| George Gallagher Metals Ltd | Omagh | 2004 |