| Eosadonis Limited | Administrative & support | 2024 |
| EP Digital Ltd | Administrative & support | 2019 |
| Epaion Ltd | Information & communication | 2016 |
| Epayme Rewards Ltd | Administrative & support | 2023 |
| EPC North Cardiff Limited | Construction | 2025 |
| EPD Productions Ltd | Manufacturing | 2020 |
| Epetlo Recruits Ltd | Wholesale & retail | 2021 |
| EPG Services Europe Ltd | Administrative & support | 2017 |
| EPI Holdings Limited | Extraterritorial | 1996 |
| Epic Beverage Ltd | Manufacturing | 2016 |
| Epic Evolution Ltd | Professional & scientific | 2019 |
| Epic Film Productions Limited | Information & communication | 2024 |
| Epic Giveaway Ltd | Wholesale & retail | 2025 |
| Epic Goods Enterprises Limited | Wholesale & retail | 2025 |
| Epic Media Products Ltd | Professional & scientific | 2025 |
| Epic Recruitment Solutions Ltd | Administrative & support | 2018 |
| Epic Swim Limited | Arts & recreation | 2024 |
| Epicure Catering Services Limited | Hospitality | 2018 |
| Epicurus Solutions Limited | Information & communication | 2016 |
| Epik Consulting Ltd | Information & communication | 2021 |
| Epotential Limited | Administrative & support | 2026 |
| EPP Group Ltd | Education | 2018 |
| Eppm Solutions Ltd | Professional & scientific | 2014 |
| EPR Tech Limited | Administrative & support | 2025 |
| Eprimepickz Limited | Wholesale & retail | 2026 |
| Eprox Consulting Ltd. | Professional & scientific | 2018 |
| Epsilon Events Ltd | Other services | 2008 |
| Epsilon FS Ltd. | Information & communication | 2016 |
| Epsilon VSL Limited | Information & communication | 2019 |
| Epsom Lifestyle Development Limited | Households | 1999 |
| Epsom PUB Co Ltd | Hospitality | 2018 |
| Epstein Liebermann L Ltd | Wholesale & retail | 2021 |
| EPT Partnership Limited | Professional & scientific | 2004 |
| Epundeet Limited | Information & communication | 2021 |
| Epworth Taxis Ltd | Transport & logistics | 2013 |
| EQ Music Distribution Ltd | Other services | 2018 |
| Eqlibrum Group Ltd | Financial services | 2019 |
| EQT Trading Ltd | Wholesale & retail | 2026 |
| Eqtlgy Mart Ltd | Wholesale & retail | 2025 |
| Equal World Ltd | Wholesale & retail | 2019 |
| Equality First Ltd | Professional & scientific | 1997 |
| Equello Ltd | Information & communication | 2025 |
| Equi Light Ltd | Wholesale & retail | 2022 |
| Equihaus Ltd | Real estate | 2025 |
| Equine Events Management Limited | Administrative & support | 2007 |
| Equine Feed Solutions Ltd | Wholesale & retail | 2019 |
| Equine Relief and Supremacy Show Products Ltd | Agriculture & fishing | 2022 |
| Equinox Consulting Limited | Information & communication | 2015 |
| Equinox Estates Group Limited | Administrative & support | 2022 |
| Equinox IC Ltd | Education | 2025 |
| Equinox J Ltd | Wholesale & retail | 2017 |
| Equinoxis Limited | Information & communication | 2025 |
| Equipelite Limited | Administrative & support | 2024 |
| Equipo Supplies Ltd | Wholesale & retail | 2022 |
| Equiquant Capital Limited | Financial services | 2025 |
| Equisec Services Ltd | Administrative & support | 2025 |
| Equisport Ltd | Wholesale & retail | 2019 |
| Equity Build Ltd | Construction | 2022 |
| Equity Capital Holdings Ltd | Real estate | 2025 |
| Equity Exchange Limited | Other services | 1985 |
| Equity Management & Investments Limited | Wholesale & retail | 2015 |
| Equity Stone Group Limited | Real estate | 2024 |
| ER Infinity Ltd | Construction | 2017 |
| ER Moves Ltd | Transport & logistics | 2019 |
| ERA of Hera CYF | Financial services | 2025 |
| ERA Properties MCR Ltd | Real estate | 2024 |
| ERA Studios Limited | Other services | 2026 |
| Eracoffee Ltd | Hospitality | 2017 |
| Eraflip Ltd | Wholesale & retail | 2022 |
| Eran Estates Limited | Real estate | 2020 |
| Erasmus @ Limited | Administrative & support | 2023 |
| Erav Properties Limited | Real estate | 2017 |
| Eraw Limited | Professional & scientific | 2020 |
| Erbaign Ltd | Wholesale & retail | 2025 |
| Erbanteile Limited | Administrative & support | 2013 |
| Erbda Limited | Administrative & support | 2008 |
| Erbil 156 Ltd | Hospitality | 2025 |
| Erbil Minimarket Ltd | Wholesale & retail | 2022 |
| Erbium Enterprise Limited | Professional & scientific | 2012 |
| Ercarll Limited | Wholesale & retail | 2023 |
| Erdeelc Gelei Limited | Wholesale & retail | 2025 |
| Erdem Cetinkaya Ltd | Wholesale & retail | 2023 |
| Erection & Welding(Cardiff)Limited | Wholesale & retail | 1964 |
| Eremnos Limited | Information & communication | 2016 |
| Ereo Consulting Ltd | Professional & scientific | 2024 |
| Eresos Holdings Limited | Wholesale & retail | 2023 |
| Eretria Services Ltd | Administrative & support | 2021 |
| ERI Barbers Limited | Other services | 2019 |
| Eric Roberts Limited | Administrative & support | 2010 |
| Eric Tang Consulting Limited | Professional & scientific | 2018 |
| Eric Woodward (Electrical) Limited | Professional & scientific | 1965 |
| Erihla Ltd | Construction | 2024 |
| Erika Store Ltd | Wholesale & retail | 2025 |
| Erikatech Engineering Ltd | Professional & scientific | 2025 |
| Erimus Holdings Limited | Professional & scientific | 2017 |
| Erin Mechanical Engineering Ltd | Professional & scientific | 2016 |
| Erin Strategic Land Limited | Real estate | 2017 |
| Erioan Private Placement Limited | Professional & scientific | 2019 |
| Eris Landscapes Ltd | Administrative & support | 2023 |
| ERK INK Ltd | Wholesale & retail | 2024 |