| Eurasia Energy Limited | Aberdeen | 2005 |
| Eurasia Mining (UK) Limited | London | 1995 |
| Eurasia Mining PLC | London | 1995 |
| Eurasian Natural Resources Corporation Limited | London | 2006 |
| Eurasian Reactive Minerals Ltd | London | 2025 |
| Eureka Drilling Services Limited | Aberdeen | 1998 |
| Euro Chemical Industry Agro Ltd | Beckenham | 2021 |
| Euro Chemical Industry Group Ltd | Beckenham | 2021 |
| Euro Chemical Industry Group Trading Ltd | Cambridge | 2021 |
| Euro Eurohua Internatiional Chemical Co., Ltd | Cardiff | 2021 |
| Euro Gaindean Minerals Co., Ltd | Cardiff | 2026 |
| Euro Indonesian Mining Limited | Coventry | 2005 |
| Euro Instrument Ltd | London | 2014 |
| Euroasia PTE Ltd | London | 2018 |
| Eurodril Limited | London | 1994 |
| Euromax Resources (Bulgaria) UK Limited | Kingston Upon Thames | 2013 |
| Euromax Resources (Macedonia) UK Limited | Kingston Upon Thames | 2012 |
| Euromax Resources Limited | Kingston Upon Thames | 2012 |
| Euromax Resources UK (Services) Limited | Kingston Upon Thames | 2012 |
| Europa OIL & GAS (Holdings) PLC | London | 2004 |
| Europa OIL & GAS (Inishkea) Limited | London | 2018 |
| Europa OIL & GAS (Ireland East) Limited | London | 2013 |
| Europa OIL & GAS (Ireland West) Limited | London | 2013 |
| Europa OIL & GAS (New Ventures) Limited | London | 2010 |
| Europa OIL & GAS (UK) Limited | London | 2014 |
| Europa OIL & GAS (West Firsby) Limited | London | 2003 |
| Europa OIL & GAS Limited | London | 1995 |
| Europal Corporation Ltd | London | 2014 |
| Europe Ineos UK Industrial Group Limited | Cambridge | 2026 |
| Europe Special Fertilizer Alliance Ltd | Coventry | 2025 |
| European Beariota Sulfur Fertilizer Co., Ltd | London | 2026 |
| European Certification International Ltd | London | 2023 |
| European Chemical Group Co., Ltd | West Midlands, England | 2026 |
| European Chemical Industry Co., Ltd | Coventry | 2025 |
| European Energy Resources Ltd | Llangadog | 2021 |
| European Mining Services Limited | London | 2016 |
| European Mobil Horticulture Ltd | West Midlands, England | 2025 |
| European OIL Partner Ltd. | London | 2026 |
| European Oilfield Speciality Chemicals Association | | 1997 |
| European Rhine Chemical Group Ltd | West Midlands, England | 2026 |
| European Safety Services Limited | Crowborough | 2008 |
| European Sphs BIO Co., Ltd | Cambridge | 2025 |
| European Xinglianhua Chemical UK Co., Ltd | Cambridge | 2025 |
| Eurotec Chemical Co., Ltd | Cambridge | 2024 |
| EV Metals Group PLC | London | 2014 |
| Evans ENG. Consultancy Ltd | High Wycombe | 2015 |
| Evara Well Engineering Ltd | Glasgow | 2021 |
| Evat Limited | Glasgow | 2024 |
| Everard Energy Limited | London | 2012 |
| Evergreen Projects Ltd | Morecambe | 2025 |
| Everitt Limited | Ormskirk | 2005 |
| Evertech Ltd | Aberdeen | 2012 |
| Evolution Energy Minerals UK Limited | Kingston Upon Thames | 2016 |
| Evolution Hose Limited | Dyce | 2015 |
| Evomines Limited | Worcester | 2020 |
| EW3 Tech Limited | High Wycombe | 2024 |
| Ewan Robson Subsea Limited | Forfar | 2005 |
| Ewarren Geoconsulting Ltd | London | 2025 |
| EX Terra Africa Limited | London | 2021 |
| Exagris Exploration Limited | Amersham | 2026 |
| Excalibur OIL Limited | Norwich | 2015 |
| Excalibur Petroleum Limited | Llandudno | 2012 |
| Excavate Project Management Ltd | Manchester | 2025 |
| Exceed MPR Limited | Lowestoft | 2016 |
| Exceed Torridon Limited | Aberdeen | 2015 |
| Excel Express Holdings Limited | Glasgow | 2020 |
| Excellence Logging Latin America Limited | London | 2018 |
| Excellence Logging Middle East Limited | London | 2018 |
| Excellence Logging Services Limited | London | 2019 |
| Excellence Management & Consulting Corporation Ltd. | London | 2011 |
| Excelsior Cryogenic Pump Support Limited | Airdrie | 2023 |
| Executive Project Controls Limited | Westhill | 2009 |
| Exeter OIL and GAS Limited | Exeter | 1986 |
| Exmoor Energy Ltd | London | 2024 |
| EXO Project Solutions Ltd | Brechin | 2024 |
| Exocyte Limited | Fareham | 2006 |
| Expendables Ltd. | Chatham Maritime | 2018 |
| Experts Exchange Limited | Bath | 2008 |
| Exploration & Production Information Company Limited | Aberdeen | 2003 |
| Exploration Consultants Limited | Abingdon | 1989 |
| Exploration Management Services Limited | Wellingborough | 2011 |
| Exploration Safety Services Ltd | Preston | 2019 |
| Exploreoil Ltd | London | 2013 |
| Exploreterra Ltd | Sutton | 2024 |
| Expro Eurasia Limited | Reading | 2004 |
| Expro North Sea Limited | Reading | 1973 |
| Extrac Technologies Limited | London | 2021 |
| Exxonmobil SNS Limited | Fawley | 2024 |
| Ezofort Rading Andlogistics Ltd | Manchester | 2025 |
| F M & Coatings Consultants Limited | Reading | 2024 |
| F. & R. Jackson Limited | Staindrop, Darlington | 1973 |
| F.B. Guest Limited | Milton Keynes | 1998 |
| F.B.G. Limited | Newark On Trent | 1992 |
| Fa-St Filtration Analysis Services Technology Ltd | Chesterfield | 2005 |
| Faccenda Limited | Glasgow | 2007 |
| Facit Quarry Limited | Lancaster | 2003 |
| FAF Industries Ltd | Pontefract | 2024 |
| Fagley Quarries Limited | Eccleshill | 1956 |
| Fahey's Quarries Limited | Par | 2025 |
| Fair Trade Gemstones Limited | Cambridge | 2007 |