| Green Fingers M&M Ltd | Preston | 2026 |
| Green Forrest Limited | Insch | 2019 |
| Green FOX Flowers UK Ltd | Aylesbury | 2026 |
| Green Futures Biofuel Limited | London | 2017 |
| Green Futures Greater Grimsby Ltd | Grimsby | 2009 |
| Green Gate Trawling Ltd | Turriff | 2025 |
| Green GEM Agriculture Limited | Malpas | 2001 |
| Green Ghana UK Limited | Halesowen | 2023 |
| Green Glow Ltd | Preston | 2021 |
| Green Gold Equine Ltd | Fivemiletown | 2023 |
| Green Goliath Ltd | Knutsford | 2022 |
| Green Goodness Ltd | Craigavon | 2025 |
| Green Grass Ltd | Accrington | 2019 |
| Green Grid Limited | Leicester | 2003 |
| Green Grove Farms Ltd | Carmarthen | 2002 |
| Green Grow Automation Ltd | Leeds | 2023 |
| Green Grow Consultancy Ltd | Doncaster | 2020 |
| Green Health Tadley C.I.C. | Tadley | 2018 |
| Green Heart Community Nursery CIC | Crewe | 2024 |
| Green Heart Farm Limited | Bristol | 2020 |
| Green Heart Oak Ltd | Andover | 2025 |
| Green Highway Limited | | 2006 |
| Green Hollow (Worcestershire) Ltd | Worcester | 2025 |
| Green House Twisters Ltd | Ely | 2025 |
| Green Husky Company Ltd | Kirkcaldy | 2020 |
| Green IS Projects Limited | Westerham | 2013 |
| Green IS Ventures Limited | Westerham | 2019 |
| Green Island Energy Ltd | Birchington | 2011 |
| Green Isle Shell Fisheries Limited | Devon | 2008 |
| Green Jjam Nurseries Ltd | Worcester | 2025 |
| Green Label Poultry Limited | Woodbridge | 2014 |
| Green Labs Research Limited | Wokingham | 2016 |
| Green Land Agriculture Ltd | Peterborough | 2024 |
| Green Lane & Co Limited | Woodbridge | 2011 |
| Green Lane Nurseries Limited | Spalding | 2019 |
| Green Lane Partnerships Ltd | Melton Mowbray | 2024 |
| Green Lane Pigs Limited | Dereham | 2016 |
| Green Lane Rural Services Ltd | Cullompton | 2022 |
| Green Lanes Farming Ltd | Rowlands Castle | 2015 |
| Green Lanes Livestock Ltd | Forestside | 2019 |
| Green Lanes Production Ltd | Rowland'S Castle | 2020 |
| Green Leaf Farming Ltd | Hawick | 2025 |
| Green Leaf Irrigation Limited | Bury St Edmunds | 2023 |
| Green Leaf Tree Care Ltd. | Ruislip | 2009 |
| Green Leaf Trees Ltd | Basingstoke | 2018 |
| Green Leaves Countryside Contractors Ltd | Sandhurst | 2006 |
| Green Life Innovations CIC | Coalville | 2022 |
| Green Links Community Interest Company | Pembroke | 2006 |
| Green Machine - Mother Nature’S Goodies Ltd | Bristol | 2026 |
| Green Magnet Farms International Ltd | London | 2025 |
| Green MAN Market Garden Ltd | Aspatria | 2017 |
| Green MAN Tree Care Ltd | Addlestone | 2018 |
| Green MAN Tree Services Limited | Whitchurch | 2016 |
| Green MAN Treeworks Ltd | Hayle | 2025 |
| Green Mantle (Ecosophy) Limited | Bridgwater | 2002 |
| Green Marigolds Community Gardens CIC | London | 2024 |
| Green Mead Farm Limited | Eastleigh | 2021 |
| Green Mile Farm Ltd | Burton Upon Trent | 1959 |
| Green Mile Holdings Limited | Leicester | 2004 |
| Green Mile Trees Limited | Retford | 2017 |
| Green Oak Farm Limited | Sandwich | 1995 |
| Green Oak Ventures Ltd | Dunfermline | 2020 |
| Green Ocean Farming Limited | Plymouth | 2020 |
| Green Ocean Organics Limited | Pulford | 2019 |
| Green ONI Limited | Croydon | 2016 |
| Green Park Farming Limited | Winchester | 2022 |
| Green Pastures Farming Ltd | Nr Nuneaton | 2022 |
| Green Pastures Northumbria Ltd | Morpeth | 2025 |
| Green Paws Limited | Bicester | 2010 |
| Green Peaks Trading Limited | Mildenhall | 2016 |
| Green Pelagic Ltd | Aberdeen | 2010 |
| Green Properties (Kent & Sussex) Limited | West Horndon | 2000 |
| Green Roofs Ireland Ltd | Larne | 2010 |
| Green Slate Garden Services Ltd | Glasgow | 2022 |
| Green Solutions (Surrey) Ltd | Walton-On-Thames | 2022 |
| Green Soul Urban Garden CIC | Cardiff | 2024 |
| Green Square Agro Consulting Ltd | Exeter | 2016 |
| Green Steps Society Ltd | London | 2018 |
| Green Stone Stud Ltd | Chelmsford | 2011 |
| Green Task Force Ltd | London | 2019 |
| Green Teach C.I.C. | Eccles | 2020 |
| Green Team Christmas Trees Limited | Inverurie | 2007 |
| Green Touch Services Ltd | Glasgow | 2022 |
| Green Tracks Enterprise Ltd | Wakefield | 2008 |
| Green Trees Arboricultural Services Ltd | Exeter | 2003 |
| Green Trees Arboriculture Ltd | St. Albans | 2019 |
| Green UP Britain Community Interest Company | Farnham | 2021 |
| Green UP Farm Limited | Llanfyrnach | 2023 |
| Green Urban London Ltd | Hove | 2021 |
| Green Valley Arborists Ltd | Halifax | 2015 |
| Green Valley Farming Limited | Cowbridge | 1998 |
| Green Valley Landscaping Limited | Bacup | 2026 |
| Green Waste Company (Abergavenny) Limited | Abergavenny | 2012 |
| Green Wizard Ltd | Exeter | 2025 |
| Green Woodland Limited | Blandford Forum | 2021 |
| Green's Lodge Estates Limited | Leicester | 1978 |
| Green's Lodge Limited | Whetstone | 2021 |
| Green-Scope Landscaping Ltd | Rowlands Gill | 2021 |
| Greenacre Arboriculture Ltd | Colchester | 2021 |
| Greenacre Composting Enterprises Ltd | Belfast | 2003 |