| Eneco Sevor Limited | Energy | 2011 |
| Eneco UK Limited | Administrative & support | 2008 |
| Energex Electrical Leeds Limited | Construction | 2025 |
| Energiekontor UK FM GmbH & Co WP FM KG (UK Branch) | | 2022 |
| Energiekontor UK Holding 2 Ltd | Financial services | 2021 |
| Energiekontor UK Holding Ltd | Financial services | 2019 |
| Energiekontor UK Management Limited | Energy | 2019 |
| Energise Virtual Solutions Limited | Information & communication | 2020 |
| Energy Aviation Services Ltd | Transport & logistics | 2013 |
| Energy Data Box Ltd | Manufacturing | 2024 |
| Energy Finance and Acquisitions Limited | Water & waste | 2014 |
| Energy Flex Limited | Information & communication | 2018 |
| Energy Neom Ltd | Energy | 2015 |
| Energy on Demand Limited | Administrative & support | 2019 |
| Energy Saving International Ltd. | Professional & scientific | 2008 |
| Energy Shield Protection Limited | Construction | 2017 |
| Energy Support Centre Ltd | Administrative & support | 2025 |
| Energy Workplace Limited | Administrative & support | 2010 |
| Energyfarm Allt Domhain Ltd | Energy | 2024 |
| Energyfarm Bunloinn LLP | | 2023 |
| Energyfarm Cornharrow Ltd | Energy | 2024 |
| Energyfarm Divot Hill Ltd | Energy | 2024 |
| Energyfarm Garcrogo Ltd | Energy | 2024 |
| Energyfarm Glenshimmeroch Ltd | Energy | 2024 |
| Energyfarm Hyndburn II Ltd | Energy | 2024 |
| Energyfarm Little Hartfell Ltd | Energy | 2024 |
| Energyfarm Narachan Ltd | Energy | 2023 |
| Energyfarm Overhill Ltd | Energy | 2024 |
| Energyfarm Rowan LLP | | 2023 |
| Energyfarm Strath Oykel LLP | | 2023 |
| Energyfarm UK Acheilidh Ltd | Energy | 2023 |
| Energyfarm UK Ballach Ltd | Energy | 2024 |
| Energyfarm UK Breackerie Ltd | Energy | 2023 |
| Energyfarm UK BU I Ltd | Energy | 2023 |
| Energyfarm UK BU II Ltd | Energy | 2023 |
| Energyfarm UK Bunloinn Ltd | Energy | 2023 |
| Energyfarm UK Co I Ltd | Financial services | 2019 |
| Energyfarm UK Co II Ltd | Financial services | 2019 |
| Energyfarm UK Coille Linne Ltd | Energy | 2024 |
| Energyfarm UK Cornharrow LLP | | 2019 |
| Energyfarm UK CR I Ltd | Financial services | 2021 |
| Energyfarm UK CR II Ltd | Financial services | 2021 |
| Energyfarm UK Craiginmoddie LLP | | 2021 |
| Energyfarm UK DU I Ltd | Financial services | 2019 |
| Energyfarm UK DU II Ltd | Financial services | 2019 |
| Energyfarm UK Dunbeath LLP | | 2019 |
| Energyfarm UK FE I Ltd | Financial services | 2019 |
| Energyfarm UK FE II Ltd | Financial services | 2019 |
| Energyfarm UK Fell LLP | | 2019 |
| Energyfarm UK GL I Ltd | Financial services | 2019 |
| Energyfarm UK GL II Ltd | Financial services | 2019 |
| Energyfarm UK Glenshimmeroch LLP | | 2019 |
| Energyfarm UK Glenvernoch Ltd | Energy | 2024 |
| Energyfarm UK HY I Ltd | Financial services | 2021 |
| Energyfarm UK HY II Ltd | Financial services | 2021 |
| Energyfarm UK Hyndburn II LLP | | 2021 |
| Energyfarm UK MA I Ltd | Financial services | 2021 |
| Energyfarm UK MA II Ltd | Financial services | 2021 |
| Energyfarm UK Manquhill Ltd | Energy | 2024 |
| Energyfarm UK Margree LLP | | 2021 |
| Energyfarm UK Meall Dearg Ltd | Energy | 2024 |
| Energyfarm UK MID Moile Limited | Energy | 2025 |
| Energyfarm UK NA I Ltd | Financial services | 2019 |
| Energyfarm UK NA II Ltd | Financial services | 2019 |
| Energyfarm UK Narachan LLP | | 2019 |
| Energyfarm UK NE I Ltd | Financial services | 2021 |
| Energyfarm UK NE II Ltd | Financial services | 2021 |
| Energyfarm UK New Rides Solar LLP | | 2021 |
| Energyfarm UK OV I Ltd | Financial services | 2019 |
| Energyfarm UK OV II Ltd | Financial services | 2019 |
| Energyfarm UK Overhill LLP | | 2019 |
| Energyfarm UK RO I Ltd | Energy | 2023 |
| Energyfarm UK RO II Ltd | Energy | 2023 |
| Energyfarm UK Rowan Ltd | Energy | 2023 |
| Energyfarm UK SOY I Ltd | Energy | 2023 |
| Energyfarm UK SOY II Ltd | Energy | 2023 |
| Energyfarm UK Strath Oykel Ltd | Energy | 2024 |
| Energyfarm UK Tarbuckle Hill Ltd | Energy | 2023 |
| Energyfarm UK WE I Ltd | Financial services | 2019 |
| Energyfarm UK WE II Ltd | Financial services | 2019 |
| Energyfarm UK Windy Edge LLP | | 2019 |
| Energyfarm Wull Muir Ltd | Energy | 2024 |
| Energygradeuk Ltd | Construction | 2026 |
| Enerswitch UK Ltd | Wholesale & retail | 2020 |
| Enertec Ltd | Construction | 2025 |
| Enex Horizon Ltd | Wholesale & retail | 2023 |
| Enfield Estates Limited | Construction | 1965 |
| Enfield Lighting Services Limited | Administrative & support | 2005 |
| Enfields Leeds Limited | Real estate | 2006 |
| ENG Tech Design Limited | Professional & scientific | 2018 |
| Engage Business Limited | Administrative & support | 2025 |
| Engage Interactive EOT Limited | Administrative & support | 2024 |
| Engage Interactive Group Limited | Financial services | 2020 |
| Engage Interactive Limited | Information & communication | 2007 |
| Engage Partnerships Services Ltd | Professional & scientific | 2020 |
| Engage Plus Limited | Manufacturing | 2017 |
| Engeneration Ltd | Construction | 2022 |
| Engie GAS Limited | Energy | 1999 |
| Engie GAS Shipper Limited | Energy | 1999 |
| Engie Power Limited | Wholesale & retail | 2001 |