| Elite Property Management (Hitchin) Limited | Real estate | 2017 |
| Elite Sportwear Limited | Wholesale & retail | 2014 |
| Elite Water Services Ltd | Construction | 2015 |
| Elizondo Property Group Limited | Real estate | 2025 |
| Elkington Electrical Limited | Construction | 2015 |
| Ellenbrook Construction Limited | Construction | 2017 |
| Ellenbrook Consulting Limited | Administrative & support | 1998 |
| Ellenbrook Facilities Management Ltd | Administrative & support | 2023 |
| Ellenbrook Group Limited | Financial services | 2024 |
| Ellenbrook Homes Limited | Real estate | 2021 |
| Ellenbrook Investments Limited | Real estate | 2021 |
| Elleny Limited | Construction | 2019 |
| Ellis Bourke Limited | Professional & scientific | 2025 |
| Ellis Mason Ltd | Administrative & support | 2016 |
| Ellis Philip Construction Limited | Construction | 2018 |
| ELM Place Residents Association (Bruce Grove) Limited | Households | 1984 |
| Elmes Accounting Services Limited | Professional & scientific | 2010 |
| Elmpark Limited | Manufacturing | 1997 |
| Elsa Next Generation CIC | Education | 2020 |
| Elsali CBT Ltd | Health & social care | 2023 |
| Else Communications Limited | Professional & scientific | 2014 |
| Elstree Grip Company Ltd | Other services | 2018 |
| Elsworthy Capital Ltd | Households | 2025 |
| Eluxe Detail Ltd | Administrative & support | 2025 |
| ELY Electrical Limited | Construction | 2021 |
| Em&M Ltd | Education | 2021 |
| Email MUM Ltd | Administrative & support | 2014 |
| Emanuel Asset Holdings Limited | Financial services | 2023 |
| Emerald & ASH Homes Ltd | Real estate | 2026 |
| Emerald Landscapes (Cambridge) Ltd | Administrative & support | 2021 |
| Emerald Search Ltd | Professional & scientific | 2026 |
| Emerdis Limited | Transport & logistics | 2013 |
| Emerdis Services Limited | Wholesale & retail | 2015 |
| Emerson Growth Partners Ltd | Professional & scientific | 2026 |
| Emirates Electronics UK Ltd | Wholesale & retail | 2015 |
| Emma Beckett PR Limited | Professional & scientific | 2009 |
| Emma Gersch Consultancy Limited | Administrative & support | 2025 |
| Emma Smith Coaching Ltd | Professional & scientific | 2023 |
| Empire Estates Sales Ltd | Real estate | 2021 |
| Emporium Furniture Ltd | Wholesale & retail | 2023 |
| Empress Social Care Ltd | Health & social care | 2019 |
| Empty Ventures Ltd | Financial services | 2023 |
| EMZ Property Ltd | Real estate | 2020 |
| Enablers Insight Ltd | Information & communication | 2021 |
| Enaible Talent Ltd | Administrative & support | 2024 |
| Encaustum Ltd | Professional & scientific | 2023 |
| Encore Intelligence Limited | Professional & scientific | 2025 |
| Encore UK Holdings Limited | Financial services | 2024 |
| Endeavour London (Hitchin) Ltd | Information & communication | 2015 |
| Endoxa Limited | Information & communication | 2017 |
| Enecovery Limited | Manufacturing | 2017 |
| Engeneering Technology Limited | Extraterritorial | 2021 |
| Engi Psychology Ltd | Health & social care | 2012 |
| Enginova Group Limited | Professional & scientific | 2025 |
| Enginova Services Limited | Administrative & support | 2025 |
| Enhance Electrical Contractors Ltd | Construction | 2024 |
| Enrico Limited | Extraterritorial | 2022 |
| Enrico's Investments Limited | Financial services | 2018 |
| Enterprise Business Systems Limited | Wholesale & retail | 2021 |
| Entrapreneur Limited | Wholesale & retail | 2025 |
| Environ Design Studio Limited | Professional & scientific | 2020 |
| Envirotech Plumbing Ltd | Water & waste | 2024 |
| EPA Products U.K. Limited | Extraterritorial | 2017 |
| EPQ Limited | Health & social care | 2025 |
| EQB Groundworks & Civil Engineering Limited | Construction | 2024 |
| EQB Group Limited | Construction | 2024 |
| EQB Residential Ltd | Construction | 2021 |
| Equibuild Plant Limited | Construction | 2020 |
| Equibuild UK Construction Limited | Construction | 2018 |
| Equipment Marketing (FAR East) Limited | Wholesale & retail | 2022 |
| Equiptech UK Limited | Administrative & support | 2011 |
| Equity Release Mortgage Advice Ltd | Financial services | 2015 |
| Equiwise Limited | Construction | 2024 |
| ER Leaders Limited | Education | 2026 |
| ERA Dispute Resolution Ltd | Professional & scientific | 2024 |
| Erdos Search Ltd | Administrative & support | 2025 |
| ERH Estates Ltd | Real estate | 2024 |
| Erin Transport Consultancy Ltd | Professional & scientific | 2026 |
| Ermine Street Equine Limited | Professional & scientific | 2008 |
| Eroofing Limited | Construction | 2019 |
| ERP Assist Limited | Information & communication | 2009 |
| Eshu Ltd | Health & social care | 2014 |
| Esme Energy Limited | Professional & scientific | 2023 |
| Esme Technology Limited | Professional & scientific | 2022 |
| ESQ Newbury Limited | Hospitality | 2024 |
| Esquires Coffee (East Midlands) Limited | Financial services | 2022 |
| Esquires Coffee (London) Limited | Financial services | 2022 |
| Esquires Coffee (South East) Limited | Wholesale & retail | 2018 |
| Esquires Coffee Eastern Region Limited | Other services | 2020 |
| Esquires Coffee Holdings Limited | Financial services | 2021 |
| Esquires Coffee Management Limited | Financial services | 2022 |
| Esquires Construction East (UK) Limited | Hospitality | 2021 |
| Esquires Construction Limited | Construction | 2025 |
| ESS Hire (2016) Limited | Administrative & support | 2016 |
| Estab Care Ltd | Administrative & support | 2024 |
| Etherington Consulting Limited | Information & communication | 2025 |
| Ethos Bridge Limited | Professional & scientific | 2025 |
| Etrufin Reserco Limited | Information & communication | 1985 |
| Ettingdon Developments Group Limited | Real estate | 2025 |
| Eunoia Research and Consulting Limited | Education | 2014 |