| Eco Blasting Limited | Salisbury | 2016 |
| Eco Bolt Limited | Macclesfield | 2023 |
| Eco Business Management Limited | London | 2003 |
| Eco Catering Ltd | Aylesbury | 2015 |
| Eco Centro Systems Ltd | Cambridge | 2022 |
| Eco Cleaning Sweden Invest Limited | London | 2023 |
| Eco Cleaning Sweden Limited | London | 2023 |
| Eco Colour Print Limited | Norwich | 2010 |
| Eco Courier Limited | Elstree Way, Borehamwood | 2006 |
| Eco Depot Limited | Greenock | 2023 |
| Eco Draft Systems Ltd | Bristol | 2024 |
| Eco Electrical Industries Limited | Grove | 2013 |
| Eco Energy Smart Limited | Sheffield | 2016 |
| Eco Entertainment Ltd | London | 2023 |
| Eco Environmental Bird Control Services Ltd | Plymouth | 2024 |
| Eco Golf Limited | Eastbourne | 2021 |
| Eco Grove Project Ltd | Canterbury | 2024 |
| Eco Holiday Homes Limited | Pocklington | 2009 |
| Eco Homes Away Limited | London | 2022 |
| Eco Incentives Limited | St. Austell | 2007 |
| Eco Innovations Ltd | London | 2024 |
| Eco Investment Group Ltd | London | 2015 |
| Eco Lift Solutions Ltd | Broadstone | 2015 |
| Eco Logistics Limited | Borehamwood | 2006 |
| Eco Management Solutions Limited | Dungannon | 2004 |
| Eco Motive Holdings Limited | Harrow | 2015 |
| Eco Movers Limited | London | 2008 |
| Eco NRG Installations Ltd | Taunton | 2015 |
| Eco NRG Operations and Maintenance Ltd | Taunton | 2015 |
| Eco Path Trading Company Limited | London | 2024 |
| Eco Plumbing & Electrical Solutions Ltd | Telford | 2014 |
| Eco Portfolio Limited | Huddersfield | 2010 |
| Eco Power & Lighting Limited | Clacton-On-Sea | 2011 |
| Eco Project Invest Ltd | Dover | 2022 |
| Eco Renov Invest Ltd | Dover | 2024 |
| Eco Resin Ltd | Halstead | 2025 |
| Eco Roofing South East Limited | Caterham | 2020 |
| Eco Scot Ltd | Kirkcaldy | 2021 |
| Eco Smart Technology Limited | Stafford | 2021 |
| Eco Sourced Procurement Ltd | Reading | 2024 |
| Eco Stadservice Limited | London | 2019 |
| Eco Star Lighting Limited | Beckenham | 2014 |
| Eco Stoves Limited | Worcester | 2007 |
| Eco Straws Limited | Manchester | 2018 |
| Eco Synthetics Ltd | Leicester | 2006 |
| Eco Systems Direct (NI) Ltd | Enniskillen | 2010 |
| Eco Trades Renewables Ltd | Paignton | 2013 |
| Eco Vapour Clean Limited | Coventry | 2015 |
| Eco Vehicle Leasing Limited | Nottingham | 2018 |
| Eco-Asphalt Supplies Limited | Derby | 2021 |
| Eco-Boards Ltd | Chelmsford | 2014 |
| Eco-Chef I Limited | Preston | 2016 |
| Eco-Cycle (Europe) Limited | King'S Lynn | 2024 |
| Eco-Friendly Publishing Limited | Totnes | 2017 |
| Eco-Hanger Limited | New Eltham | 2003 |
| Eco-Heat Pumps West Country Ltd | Bistol | 2024 |
| Eco-Hygiene Limited | Caerphilly | 2003 |
| Eco-Lighting Systems (UK) Limited | Elmstead Market | 2014 |
| Eco-Lite Stone Limited | Lytham St. Annes | 2011 |
| Eco-Max Health Ltd | London | 2016 |
| Eco-Pac Limited | Henley-On-Thames | 1921 |
| Eco-Sukgarden (UK) Company Limited | Cambridge | 2021 |
| Eco-Tech (Southern) Limited | Petersfield | 2011 |
| Eco-Therm Renewable Energy Ltd | Sheffield | 2011 |
| Eco.Wood International Trade Limited | Cambridge | 2025 |
| ECO2 Energy Limited | Kidderminster | 2012 |
| Ecoagri Limited | Wickford | 2024 |
| Ecoairpack PVT Ltd | Romford | 2020 |
| Ecoaqua Water Technologies Limited | Beckenham | 2020 |
| Ecobank Limited | Stroud | 2004 |
| Ecobother Limited | Ely | 2009 |
| Ecobreeze Limited | Rochester | 2018 |
| Ecobuild Alliance Ltd | Enfield | 2022 |
| Ecobuildsupplies Ltd | Saltash | 2009 |
| Ecocar Limited | Stockport | 2001 |
| Ecocent Ltd Ltd | Abingdon | 2021 |
| Ecoda Limited | Cambridgeshire | 2006 |
| Ecodek Limited | Solihull | 1996 |
| Ecodrip Limited | London | 2006 |
| Ecofied Limited | Wrexham | 2010 |
| Ecofill Limited | Leeds | 2023 |
| Ecofluency Ltd | London | 2020 |
| Ecofox Ltd. | London | 2015 |
| Ecofranking Ltd | Alston | 2009 |
| ECOGR8 Limited | London | 2021 |
| Ecographic Limited | Brighton | 2006 |
| Ecolife Metal Products Co., Ltd | Ruislip | 2018 |
| Ecolife Plus International Trading Ltd | Beckenham | 2015 |
| Ecolodge Limited | Bangor | 2007 |
| Ecological Homes Limited | King'S Lynn | 2017 |
| Ecology Matters Ltd | Liskeard | 2020 |
| Ecolonergy UK Ltd | Dover | 2007 |
| Ecom Development Ltd | Dover | 2024 |
| Ecomagic Ltd | Sittingbourne | 2005 |
| Ecomanager Limited | Ashby-De-La-Zouch | 2005 |
| Ecomansions Limited | Ashford | 2016 |
| Ecombase Ltd | Cheadle | 2023 |
| Ecombase Storage Ltd | Cheadle | 2021 |
| Ecomerchant Limited | Chippenham | 2001 |
| Ecometals Cornwall Limited | Cornwall | 2021 |