| Gatemark Limited | Lincolnshire | 1993 |
| Gater Group Ltd | London | 2022 |
| Gates Farm Limited | Great Missenden | 1973 |
| Gates Farming Ltd | Quorn | 2020 |
| Gateshire Limited | Newton Abbot | 1974 |
| Gateside Stables Limited | Galston | 2023 |
| Gateway Collective ST. Helens CIC | St Helens | 2025 |
| Gather at Ltd | Cheltenham | 2012 |
| Gather Ground Limited | Bruton | 2026 |
| Gatsby Africa | London | 2014 |
| Gattonside Mains Limited | Melrose | 2001 |
| GAU Authentic Ltd | Tadworth | 2025 |
| Gavin Adams Limited | Colchester | 2002 |
| Gavin Hobson Tree Services Ltd | Coventry | 2020 |
| Gavin Johnson Limited | Dunmow | 2005 |
| Gavin L Smith & SON Limited | | 2006 |
| Gavin Smith Fishing Ltd | Buckie | 2013 |
| Gavin Tree Specialists Limited | Tarporley | 2014 |
| GAW Marine Ltd | Banff | 2016 |
| Gawsworth Track Livery Ltd | Macclesfield | 2019 |
| Gawthorpe Estates Limited | Hampshire | 1958 |
| Gayener Kennels Ltd | Maldon | 2026 |
| Gaymer Limited | Ingatestone | 2010 |
| Gaynes Park Farms Limited | London | 1997 |
| Gaywood Farm Partners Ltd | Tunbridge Wells | 2024 |
| Gazen Salts Nature Reserve | Sandwich | 2006 |
| GB & AM Anderson Limited | Forfar | 1996 |
| GB Agri Ltd | Cirencester | 2026 |
| GB Botanicals Limited | Cranbrook | 2022 |
| GB Carbon Neutral Forest UK Limited | Upminster | 2025 |
| GB Equestrian Limited | Buntingford | 2025 |
| GB Fruit Company PLC | Knowlhill | 2020 |
| GB Hawking Limited | Sittingbourne | 2022 |
| GB Lights PLC | Milton Keynes | 2020 |
| GB Livestock UK Ltd | Fraserburgh | 2026 |
| GB Sheep Services Ltd | Preston | 2024 |
| GBC Utilities Ltd | Hoddesdon | 2019 |
| Gbee Shrimp & Aquatics Ltd | Tamworth | 2022 |
| GBF (NW) Ltd | Wigan | 2016 |
| GBH Contracting Ltd | Huby | 2022 |
| GBR Forestry Ltd | Hatfield | 2023 |
| Gbsi Ltd | Bristol | 2023 |
| Gbsk Ltd | London | 2014 |
| GBT Farming Ltd | Market Harborough | 2021 |
| GC & AC Joules Limited | Haverfordwest | 2004 |
| GC & DA HIX & SON Limited | Bourne | 2012 |
| GC Equine Limited | Bracknell | 2020 |
| GC Field & Sons Limited | Market Harborough | 2021 |
| GC Livery Limited | London | 2026 |
| GC Outdoor Services Ltd | Hawick | 2012 |
| GC Sports Horses Limited | Tewkesbury | 2019 |
| GCD Tree Surgery Ltd | Hailsham | 2025 |
| GCF Investments Limited | Bampton | 2023 |
| GCF Wiltshire Limited | London | 2023 |
| GCH Celery & Organics Ltd | Ely | 2024 |
| GCH Equine Services Ltd | Sleaford | 2023 |
| GCH Growers Limited | Ely | 2011 |
| GCH Prop Limited | Ely | 2024 |
| GCH Salads Limited | Ely | 2026 |
| GCK Treeworks Ltd | Wellingborough | 2015 |
| GCW Trading Limited | Invergarry | 2015 |
| GD Web Limited | Dalton-In-Furness | 2012 |
| Gdani Ltd | Belfast | 2022 |
| GDM Engineering Solutions Ltd. | 4/5 Golden Square | 2019 |
| GDP Farms Limited | Craven Arms | 2019 |
| GE & CM Hough Limited | Malpas | 2003 |
| GE Farm Limited | Market Harborough | 2022 |
| Gearrchoille Community Wood Ardgay | Ardgay | 2004 |
| Gebb Services Ltd | Blandford Forum | 2023 |
| Geddes Agri Ltd | Montgomery | 2007 |
| Geddes Fishing Limited | Peterhead | 2023 |
| Geddings Manor Farming Limited | Saffron Walden | 2017 |
| Gedges Farm Ltd | Tonbridge | 2019 |
| Gedhall Limited | St Andrews | 1964 |
| GEE Gees Ranch Healing Acres CIC | Bury St Edmunds | 2022 |
| GEE JAY Farming Limited | Borehamwood | 2011 |
| Geentech International Ltd | Coventry | 2022 |
| Geeson Holdings Limited | Matlock | 1980 |
| Geevee Enterprises Limited | Manchester | 1997 |
| Geevee Services Limited | Essex | 2007 |
| Gegs Eggs Limited | Whitland | 2025 |
| Gejm Ltd | Derby | 2018 |
| GEL Global Ltd | Derby | 1980 |
| Geldard Farm Eggs Limited | Kendal | 2012 |
| Gell and Sons Limited | Bridlington | 2019 |
| Gellan Farms (Aboyne) Ltd | Aboyne | 2010 |
| Gellatly (Stafford) Ltd. | Stone | 2008 |
| Gelli HIR Farm Limited | Bristol | 1963 |
| Gelli Iago CYF | Porthmadog | 2020 |
| Gelli Lower Ltd | Pontypridd | 2025 |
| Gelli Upper Ltd | Pontypridd | 2025 |
| Geltbridge Land Limited | Carlisle | 2011 |
| GEM Farming Ltd | Penicuik | 2025 |
| GEM Horse Retirement Home Limited | Watford | 2022 |
| GEM Livestock Ltd | Shrewsbury | 2014 |
| Gem's Pomskies Adventures Ltd | Brigg | 2020 |
| Gemini Acres Limited | Woodford Green | 2020 |
| Gemini Driver Hire Ltd | Goole | 2015 |
| Geministaffs Ltd | Halifax | 2025 |
| Gemma Gurvidi Eventing Limited | Bristol | 2023 |