| Eduventure Limited | Education | 2024 |
| Edward Owen Ltd | Transport & logistics | 2019 |
| Edwards & Son’S Renovations Ltd | Professional & scientific | 2004 |
| Edwards QS Consultants Ltd | Professional & scientific | 2017 |
| EEE Safe Ltd | Other services | 2012 |
| Eezee Group Trading AS Eezee Logistics Ltd | Transport & logistics | 2016 |
| EF Business Affairs Limited | Professional & scientific | 2022 |
| EF Designs Limited | Arts & recreation | 2021 |
| Efes Bistro & Grill Ltd | Hospitality | 2025 |
| Effective Change Management Limited | Professional & scientific | 2012 |
| Efficient Living Solutions UK Ltd | Construction | 2023 |
| Efficient Property Finance Limited | Financial services | 2016 |
| Efficient Property Lettings Ltd | Real estate | 2025 |
| EFH Engineering Limited | Professional & scientific | 2018 |
| EFH Global Engineering Limited | Professional & scientific | 2024 |
| Efosa Consulting Limited | Information & communication | 2021 |
| Efs-Services Ltd | Energy | 2014 |
| EFT Consult Ltd | Professional & scientific | 2011 |
| EG Containers Limited | Manufacturing | 2023 |
| EG Power Limited | Energy | 2017 |
| Eggrider Ltd | Wholesale & retail | 2019 |
| Eggxactly Ltd | Manufacturing | 2021 |
| EGR Arts Ltd | Information & communication | 2019 |
| EGR Swansea Limited | Real estate | 2017 |
| EH7 Internet Limited | Information & communication | 2001 |
| Ehauer Ltd | Wholesale & retail | 2015 |
| Ehealth Digital Media Ltd | Information & communication | 2014 |
| Ehomes Property Ltd | Construction | 2019 |
| Ehrabella Services Ltd | Health & social care | 2021 |
| EID Sons Capital Ltd | Health & social care | 2025 |
| Eiger Ground Rents Limited | Real estate | 2025 |
| Eilmer Aerospace Ltd | Professional & scientific | 2022 |
| EIN Eiddo Limited | Real estate | 2024 |
| Eirlys Solutions Ltd | Administrative & support | 2022 |
| Eishprop Ltd | Real estate | 2023 |
| Eisken Properties Ltd | Real estate | 2021 |
| EJ Pharm Limited | Wholesale & retail | 2006 |
| EJ9 Investments Limited | Financial services | 2021 |
| EJ9 Limited | Financial services | 2019 |
| Ejalonibu Ltd | Health & social care | 2023 |
| EJE Accountants Limited | Professional & scientific | 2009 |
| Ejlk Holdings Limited | Real estate | 2023 |
| EJS Technical Services Ltd | Professional & scientific | 2024 |
| EKA ALI Ltd | Wholesale & retail | 2025 |
| EKD Enterprises Limited | Financial services | 2024 |
| Ekinwood Redman Trading Ltd | Information & communication | 2017 |
| Ekka Training Limited | Education | 2023 |
| Elankobala Fuel Ltd | Wholesale & retail | 2019 |
| Elbad Ltd | Administrative & support | 2009 |
| ELC Vocational Rehabilitation Services Ltd | Health & social care | 2021 |
| Ele's Little Kitchen Limited | Hospitality | 2022 |
| Eleco Electric Ltd | Construction | 2020 |
| Electechs Ltd | Manufacturing | 2002 |
| Election Night Limited | Information & communication | 2016 |
| Electric Devil Tattoo Parlour Limited | Arts & recreation | 2024 |
| Electrical & Renewable Installations Limited | Construction | 2023 |
| Electrical Contractors (Ashfield) Ltd | Construction | 2011 |
| Electrical Courses Limited | Education | 2013 |
| Electrical Innovation (Wales) Limited | Construction | 2011 |
| Electrigise Ltd | Construction | 2022 |
| Electro-Harmonix UK Limited | Manufacturing | 2011 |
| Electronic Services (Wales) Limited | Wholesale & retail | 2009 |
| Electronic Services Group Limited | Professional & scientific | 2019 |
| Electrotech Vending Ltd | Manufacturing | 2012 |
| Eleen Supermarket Limited | Wholesale & retail | 2025 |
| Elegant Aesthetics Ltd | Other services | 2026 |
| Elegant Beauty and Aesthetics Ltd | Other services | 2025 |
| Elegantessenceuk Ltd | Wholesale & retail | 2024 |
| Element Knotweed Ltd. | Administrative & support | 2024 |
| Element Records Ltd. | Extraterritorial | 2024 |
| Eleri Films Ltd | Arts & recreation | 2024 |
| ELEV8 Dawns CIC | Arts & recreation | 2026 |
| ELEV8 Scaffolding (South Wales) Limited | Construction | 2025 |
| Elevate Reform Pilates Studio Limited | Arts & recreation | 2025 |
| Elevate Retail Consultancy Ltd | Professional & scientific | 2021 |
| Elevating Excellence Limited | Manufacturing | 2004 |
| Elevation Scaffolding & Roofing Services Ltd | Construction | 2024 |
| Eleventra Limited | Administrative & support | 2025 |
| Elevia Care Ltd | Health & social care | 2026 |
| Elevia Group Ltd | Financial services | 2026 |
| Eley Solutions Ltd | Administrative & support | 2013 |
| Elgan Property Ltd | Water & waste | 2020 |
| ELI Barber Ltd | Other services | 2024 |
| Elias Carpentry Limited | Construction | 2019 |
| Elias Logistics Limited | Transport & logistics | 2019 |
| Elias Lomax Property Ltd | Real estate | 2025 |
| Elidian Limited | Information & communication | 2025 |
| Elija Management Services Limited | Administrative & support | 2010 |
| Elite Aerials Holdings Limited | Financial services | 2025 |
| Elite AI Systems Ltd | Information & communication | 2025 |
| Elite Autofinish Limited | Administrative & support | 2023 |
| Elite Blasting Solutions Limited | Administrative & support | 2022 |
| Elite Celebrity Management Ltd | Professional & scientific | 2011 |
| Elite Drywall Interiors Limited | Construction | 2020 |
| Elite Ears Micro Suction Ltd | Health & social care | 2024 |
| Elite Flooring Wales Limited | Construction | 2017 |
| Elite Heating Services (Wales) Limited | Construction | 2002 |
| Elite Medical Appointments Limited | Health & social care | 2009 |
| Elite Occupational Health Ltd | Health & social care | 2007 |
| Elite Property Solutions (Swansea) Ltd | Construction | 2025 |