| Earthline Aggregates Ltd | Witney | 2015 |
| Earthline Limited | Marlborough | 1990 |
| Earthline Recycling Ltd | Witney | 2015 |
| Earthstone Resources (Europe) Ltd | Gravesend | 2012 |
| Earthworks Capital Ltd | Blackburn | 2023 |
| East Anglia Plant Services Ltd | London | 2019 |
| East Anglian Stone Limited | Beeston Kings Lynn | 1973 |
| East Coast Commissioning Limited | Hawick | 2002 |
| East Coast Quarry Materials and Commercial Consultants Ltd | Dundee | 2019 |
| East Coast Rope Access Solutions Ltd | Kirkcaldy | 2026 |
| East Line Express Limited | Reading | 2015 |
| East Midlands Aggregates Ltd | Wilmslow | 2022 |
| East Star Resources PLC | London | 2020 |
| Eastern Energy Enterprises (UK) Ltd | London | 2008 |
| Eastern Global Limited | London | 2026 |
| Eastern Stone Ltd | Swansea | 2016 |
| Eastham Sand Limited | Warrington | 1998 |
| Eastonrock Energy Ltd | London | 2024 |
| Eastwood Subsea Limited | Huddersfield | 2015 |
| Easygoing Designs Ltd | Southampton | 2001 |
| Echo Energy Argentina Holdings Limited | London | 2017 |
| Echo Gecko Limited | Armagh | 2014 |
| Echo GEO Ltd | London | 2016 |
| Echo Natural Resources Limited | London | 2024 |
| Echo Petroleum Limited | London | 2002 |
| Echo Seismic Holdings Ltd | Wembley | 2024 |
| ECL Group Limited | Abingdon | 1995 |
| Eclectic Engineering Solutions & Consultancy Limited | Bristol | 2009 |
| Eclipse Well Services Ltd | Berkhamsted | 2026 |
| Ecliptic Gold Limited | London | 2025 |
| Eco Fit Facilities Management Limited | Stoke-On-Trent | 2023 |
| Eco Glass Recycling Ltd | London | 2023 |
| Eco Veridi Ltd | London | 2018 |
| Eco-Nomic Innovations Limited | Aughnacloy | 2009 |
| Eco-Soil Group Ltd | London | 2021 |
| Ecoenviro Limited | Manchester | 2023 |
| Ecora Royalties PLC | London | 1967 |
| Ecore Construction Services Ltd | Greenford | 2020 |
| Ecorp OIL & GAS UK Limited | London | 2010 |
| Ecosafemed NE Ltd | Morpeth | 2023 |
| Ecosand Minerals Ltd | Newtownards | 2025 |
| Ecossair Imaging Ltd | Montrose | 2019 |
| Ecosse Drilling Consultants Limited | Banchory | 2021 |
| ECR Digital Limited | Perth | 2025 |
| ECR Minerals PLC | Mildenhall | 2004 |
| ECS Works Limited | Sunderland | 2018 |
| Ecwrio S.P.A. Ltd | Stafford | 2022 |
| ED Young Offshore Services Ltd | Redruth | 2026 |
| EDC Holdings Group Limited | Cambridge | 2020 |
| EDD Contracts Ltd | Leicester | 2009 |
| Eden Geothermal Limited | Par | 2016 |
| Eden Ocean Limited | Lamberhurst | 2025 |
| Eden OIL & GAS Limited | Peterlee | 2025 |
| Edentrillick Quarries Limited | Lisburn | 1987 |
| Edge Europe Holdco Limited | Fareham | 2019 |
| Edgware Metals Limited | Dunstable | 2026 |
| Edinburgh Rope Access Ltd | Edinburgh | 2011 |
| Edmar Salt Extraction Ltd | Southport | 2023 |
| EDN Ltd | Dundee | 2022 |
| Edumed Procurement Limited | Cardiff | 2024 |
| Edwin Campbell Consulting Limited | Wimborne | 2022 |
| EFA Mining Limited | Norwich | 2025 |
| Efam (Germany) Crop Nutrition Limited | Beckenham | 2024 |
| EFG Digital Ltd | London | 2025 |
| Efrac Ltd | Wigan | 2020 |
| Egal Consulting Ltd | London | 2025 |
| Egcinspection Limited | Motherwell | 2022 |
| Egdon Resources (Aurora) Limited | Aberdeen | 2006 |
| Egdon Resources Limited | Stroud | 2007 |
| Egdon Resources U.K. Limited | Stroud | 1997 |
| EGM Consulting Limited | Llandudno | 2026 |
| Egremont Mining Company Limited(The) | Cumbria | 1981 |
| EJC & SON Limited | Newtownabbey | 2025 |
| EJM Fabrications Ltd | Dundee | 2016 |
| EK Mining Limited | Sheffield | 2018 |
| Eknalos Geotek Ltd | London | 2026 |
| Ekosaf Limited | London | 2021 |
| EL Land Restoration Limited | Marlborough | 2024 |
| Elabcoda Equipment Limited | Newry | 2026 |
| Eland OIL & GAS Limited | Aberdeen | 2009 |
| Elantra Procurement Ltd | Oldham | 2017 |
| Elbec Stone Ltd | Caernerfon | 2025 |
| ELC Drilling Limited | Dundee | 2003 |
| Elda Nachsami Ltd | Peterborough | 2005 |
| Elder Offshore Services Ltd | Kirkcaldy | 2024 |
| Eldon Electrical Services Limited | Hartlepool | 2018 |
| ELE Abandonments Limited | Glasgow | 2022 |
| ELE Agriculture Ltd | Reading | 2022 |
| Electricsands Ltd. | Wirral | 2018 |
| Electromagnetic Geoservices UK Limited | Cardiff | 2002 |
| Electrotechnical Consultancy Services Limited | Kirkcaldy | 2015 |
| Element Minerals Ltd. | Stafford, | 2025 |
| Element Mines Holdings Ltd | Bognor Regis | 2023 |
| ELEMENT-46 Ltd | London | 2019 |
| Elemental Resources Limited | London | 2015 |
| Elephant OIL Limited | London | 2013 |
| Elevate Hldg Ltd | Waterlooville | 2024 |
| Elevate Minerals Cornwall Limited | London | 2026 |
| Elevate Minerals Limited | Cornwall | 2021 |
| Elgenio Ltd | Montrose | 2015 |