| Energy Healing Ltd | Manchester | 2021 |
| Energy House Group Limited | Dudley | 1998 |
| Energy Impact Water Ltd | Canvey Island | 2017 |
| Energy Infrastructure Limited | London | 2014 |
| Energy Innovation Agency Limited | Manchester | 2021 |
| Energy Kick Fitness Ltd | Newcastle Upon Tyne | 2021 |
| Energy Kidz Ltd | Wokingham | 2020 |
| Energy Ladder Limited | Edinburgh | 2009 |
| Energy Law Limited | Glasgow | 2018 |
| Energy Maritime Limited | London | 1994 |
| Energy Medicine Association Ltd | Leighton Buzzard | 2023 |
| Energy of Nature Ltd | London | 2021 |
| Energy PK Ltd | London | 2015 |
| Energy Planning Limited | Kenilworth | 2021 |
| Energy Pro Recruitment Limited | Stockport | 2024 |
| Energy Professionals Centre Ltd | Newcastle Upon Tyne | 2015 |
| Energy Pumps Limited | Bingham | 2003 |
| Energy Recovery Strategies Ltd | Oswetry | 2012 |
| Energy Retail Association Limited | London | 2003 |
| Energy S4VERS Ltd | London | 2025 |
| Energy Safety Trust | Andover | 2009 |
| Energy Saving Genie Ltd | London | 2020 |
| Energy Saving Supermarket Limited | Chatham | 2012 |
| Energy Saving Trade Frames Limited | Kingswinford | 1999 |
| Energy Service Bristol Limited | Bristol | 2020 |
| Energy Shield SPV 1 Ltd | Hove | 2024 |
| Energy SRS Ltd | Twickenham | 2013 |
| Energy Store 2 Ltd | London | 2016 |
| Energy Swap Ltd | London | 2026 |
| Energy UK Limited | London | 2009 |
| Energy Wise Electrical Ltd | Craigavon | 2023 |
| Energy World International Limited | Southampton | 2017 |
| Energy ZOO Ltd | Leicester | 2014 |
| ENERGY24 Services Limited | Thornaby | 2009 |
| ENERGY4HEAT Ltd | Selby | 2023 |
| Energyform Limited | Sheffield | 2001 |
| Energyformat Limited | Sevenoaks | 2004 |
| Energyfund Limited | Windsor | 2008 |
| Energysoftserv UK Ltd | Wembley | 2019 |
| Enerjoy Limited | Sunderland | 2023 |
| Enerologies Consultancy Limited | Kincardineshire | 2005 |
| Enersyst Powersystems Limited | Welshpool | 2019 |
| Enertric Technology Limited | Eastleigh | 2005 |
| Enexus Renewables Development Ltd | London | 2026 |
| Enfex Limited | West Midlands | 1999 |
| Enfield (JKL) Limited | Middlesex | 2001 |
| Enfield (MNO) Limited | Middlesex | 2002 |
| Enfield Foundry Company Limited(The) | Braintree | 1977 |
| Enfield Guitars Ltd | Ashford | 2008 |
| Enfield Street Services Ltd | Portstewart | 2007 |
| Enfieldian Coach Tours Limited | Potters Bar | 1991 |
| Enfilube Chemical Ltd | London | 2009 |
| Enfys Watcyn Pugh Limited | London | 1995 |
| ENG Holdings Limited | Manchester | 2001 |
| Engage Asset Capital Ltd | North Shields | 2024 |
| Engage Occupational Therapy Limited | Goole | 2015 |
| Engage Transport Ltd | Birmingham | 2016 |
| Engaged Events (UK) Limited | London | 2008 |
| Engagement Multiplier Ltd | Stratford Upon Avon | 2015 |
| Engagement Rings of London Limited | London | 2003 |
| Engagesport Services Limited | Cardiff | 2012 |
| Engaine 1959 Limited | Peterborough | 2014 |
| Engebo Invest Limited | London | 2022 |
| Engebo Limited | London | 2022 |
| Engect Limited | Aberdeen | 2017 |
| Engelberg Xibi United Design Limited | London | 2022 |
| Engelec Power Technology Co., Ltd. | Beckenham | 2023 |
| Engenda Limited | Runcorn | 1977 |
| Engeneering Technology Limited | Hitchin | 2021 |
| Engenetics Limited | Buckingham | 2009 |
| Enger Selg & Coaching Investment Limited | London | 2026 |
| Enger Selg & Coaching Limited | London | 2026 |
| Engexis Holdings Ltd | Kingston Upon Thames | 2026 |
| Engine Repair Services (Burscough) Ltd | Lathom Burscough | 2002 |
| Engineered Earth Ltd | Truro | 2013 |
| Engineering & Consultancy Solutions Ltd | Aldershot | 2026 |
| Engineering & Technology Limited | Doncaster | 2026 |
| Engineering and Welding Supplies Limited | Birmingham | 1964 |
| Engineering Construction Solutions Limited | Redditch | 2019 |
| Engineering Dynamics Ltd | Surrey | 2006 |
| Engineering Everyone Ltd | Sutton | 2022 |
| Engineering Integration Consulting Ltd | Gloucester | 2021 |
| Engineering Property Limited | Haywards Heath | 2023 |
| Engineering Resource Group Limited | Bristol | 2015 |
| Engineering Services Yorkshire Limited | Barnsley | 2024 |
| Engineering Solutions Worldwide Limited | Morecambe | 2010 |
| Engineering Supply Company Limited | Glasgow | 2011 |
| Engineers Corporation Ltd | Watford | 2008 |
| Engineers Warehouse Limited | Rotherham | 2006 |
| Engineers Without Borders UK Trading Limited | London | 2008 |
| Enginef Holding Limited | London | 2016 |
| Enginef Operating Limited | London | 2016 |
| Engines for Sale Limited | Felixstowe | 2010 |
| Enginius FZ (UK) Ltd | Redditch | 1984 |
| Engird Limited | Northamptonshire | 1966 |
| Engitec Ltd | Paisley | 2024 |
| Englandfootball.Com Limited | London | 2000 |
| Englecare Ltd | Coventry | 2024 |
| Englewood Homes Ltd | Billericay | 2021 |
| English Chain Direct Limited | Sheffield | 2014 |