| Elevate Claims Consulting Ltd | Professional & scientific | 2025 |
| Elidor Finance Ltd | Financial services | 2016 |
| Elin Events LLP | | 2025 |
| Elite Fade Limited | Other services | 2026 |
| Elite Portfolio Limited | Real estate | 2009 |
| Elite Raffles Ltd | Other services | 2025 |
| Elite Renovation Experts Ltd | Construction | 2024 |
| Elite Signs & Graphics Limited | Administrative & support | 2004 |
| Elite Solutions (UK) Limited | Wholesale & retail | 2010 |
| Elite Sport Performance Limited | Arts & recreation | 2015 |
| Elizium Tech Ltd | Information & communication | 2023 |
| Elliot Jones Property Investments Limited | Real estate | 2019 |
| Elliott Electrical (Bridgend) Ltd. | Construction | 1991 |
| Ellis Industrial Property Limited | Real estate | 2012 |
| Elmas Care Limited | Health & social care | 2025 |
| Elphinston Performance Limited | Health & social care | 2005 |
| Elyann Limited | Health & social care | 2021 |
| Emanuel Collective Ltd | Hospitality | 2026 |
| Emerald Dragon Property Developments Ltd | Construction | 2025 |
| Emergence Media Ltd | Information & communication | 2018 |
| Emil Drive Ltd | Transport & logistics | 2018 |
| Emil Fast Trans Ltd | Transport & logistics | 2025 |
| Emil Orosz Ltd | Transport & logistics | 2013 |
| Emlyn Mounty Ltd | Professional & scientific | 2015 |
| Emma Louise School of Dance Ltd | Arts & recreation | 2024 |
| Emma Loyns LLP | | 2017 |
| Emmaus South Wales | Wholesale & retail | 2010 |
| Empty Casket Ltd | Wholesale & retail | 2015 |
| Enchanted Adventures Ltd | Arts & recreation | 2024 |
| Encompass Community Living Limited | Financial services | 2015 |
| Endeavour Law Limited | Professional & scientific | 2013 |
| Enerbartol Limited | Professional & scientific | 2016 |
| Energyfarm UK PE I Ltd | Financial services | 2019 |
| Energyfarm UK PE II Ltd | Financial services | 2019 |
| Energyfarm UK Pencarreg LLP | | 2019 |
| Enforcer Fitness Ltd | Arts & recreation | 2023 |
| Enfour Limited | Arts & recreation | 1976 |
| Engage Training Limited | Education | 2015 |
| Engineering Education Scheme Wales Limited | Education | 2011 |
| Engineering Industrial Solutions Ltd | Professional & scientific | 2020 |
| Engineering Services (Bridgend) Limited | Manufacturing | 2003 |
| Engineering Services (Bridgend) Midlands Limited | Manufacturing | 2021 |
| Engineering Services (London) Limited | Manufacturing | 1993 |
| Engsolve Limited | Professional & scientific | 2006 |
| Enterprise Taff ELY Ogwr Partnership Limited | Administrative & support | 1998 |
| Envexo Waste Limited | Water & waste | 2023 |
| Envik Waste Recycling Services Limited | Water & waste | 2024 |
| Environmental Construction Ltd | Construction | 2015 |
| Environmental Focus Limited | Professional & scientific | 2018 |
| Envy Foods Ltd | Hospitality | 2018 |
| Enzo Logistic Services Limited | Transport & logistics | 2020 |
| EOS Renewables Limited | Professional & scientific | 2010 |
| Epitech Property Limited | Financial services | 2020 |
| Epitech Solutions Ltd | Information & communication | 2017 |
| Equal Horizons Ltd | Professional & scientific | 2025 |
| Equine Assisted Therapy Cyfyngedig | Education | 2019 |
| Equipnet Ltd | Manufacturing | 2011 |
| ERH Communications Limited | Transport & logistics | 1992 |
| ERH Path Ltd | Health & social care | 2022 |
| Eric Collier & SON GAS Engineers Limited | Construction | 2010 |
| Eric James Travel Services Ltd | Transport & logistics | 2019 |
| Errioc Carpentry Limited | Manufacturing | 2021 |
| Errioc Media Ltd | Professional & scientific | 2022 |
| Escape Cosmetic Therapy Ltd | Other services | 2020 |
| Escape Watersports Ltd | Wholesale & retail | 2011 |
| Esel Group Ltd | Financial services | 2021 |
| Esinti Logistic Ltd | Transport & logistics | 2025 |
| Esmé Women's Health Limited | Health & social care | 2026 |
| Espack Eurologistica Ltd | Transport & logistics | 2013 |
| Etape Limited | Professional & scientific | 2008 |
| Eterium Limited | Manufacturing | 2025 |
| Euro Alloys Limited | Wholesale & retail | 1990 |
| Eurolegalitas Limited | Professional & scientific | 2008 |
| Euroschools Plus Limited | Wholesale & retail | 2005 |
| Eurosential Freight Ltd | Transport & logistics | 2022 |
| Evans Carpentry (Bridgend) Ltd | Construction | 2022 |
| Evans Infotech Limited | Information & communication | 2020 |
| Evans Roofing Ltd | Construction | 2026 |
| EVE ASH Photography Limited | Professional & scientific | 2022 |
| Eveberry Limited | Extraterritorial | 2026 |
| Evemarsh Limited | Extraterritorial | 2025 |
| Events Onstage Limited | Wholesale & retail | 2019 |
| Ever Exploring Ltd | Administrative & support | 2016 |
| Evergreen Renewable Solutions Ltd | Construction | 2018 |
| Everhale Limited | Extraterritorial | 2026 |
| Evermain Limited | Extraterritorial | 2025 |
| Evermare Limited | Extraterritorial | 2025 |
| Evertrust Solutions Ltd | Financial services | 2025 |
| Every Peace Ltd | Manufacturing | 2025 |
| Everycare (Bridgend) Limited | Administrative & support | 2003 |
| EVI Electrical Services Ltd | Construction | 2022 |
| Evie's Nails Limited | Other services | 2025 |
| Evolve Electrical South Wales Limited | Manufacturing | 2020 |
| EWD Properties Limited | Real estate | 2018 |
| Ewenny Angling Supplies Limited | Wholesale & retail | 2003 |
| Ewenny Court Limited | Financial services | 2024 |
| Ewenny Farm Lodges Ltd | Hospitality | 2015 |
| Ewenny Garden Centre Ltd | Wholesale & retail | 2010 |
| Ewenny Group Ltd | Administrative & support | 2024 |
| Ewenny Properties Limited | Real estate | 2018 |