| Echo Group Holdings Ltd | Construction | 2016 |
| Echo Healthcare Solutions Limited | Health & social care | 2016 |
| Echo Inn CMC Ltd | Professional & scientific | 2023 |
| Echo Pictures Limited | Information & communication | 2021 |
| Echo Plus Ltd | Health & social care | 2022 |
| Echo Production Sound Limited | Information & communication | 2010 |
| Echo Technology Ltd | Information & communication | 2024 |
| Echo Testing Ltd | Information & communication | 2018 |
| Echo Unlimited Ltd | Professional & scientific | 2017 |
| Echodirect Ltd | Health & social care | 2022 |
| Echoic Audio Limited | Information & communication | 2010 |
| Echora Advisory Ltd | Professional & scientific | 2026 |
| Echosoft Consultancy Ltd | Administrative & support | 2015 |
| Ecjob Property & Management Limited | Real estate | 2023 |
| Eckhomedia Ltd | Professional & scientific | 2015 |
| Eckington Dental Practice Limited | Health & social care | 2011 |
| Ecko Electronics Ltd | Professional & scientific | 2025 |
| Eclectic Engineering Solutions & Consultancy Limited | Mining & quarrying | 2009 |
| Eclinical Forum Limited | Other services | 2016 |
| Eclipse Education ALP Ltd | Education | 2023 |
| Eclipse Healthcare Ltd | Health & social care | 2026 |
| Eclipse Office Centre (Staple Hill) Management Limited | Households | 1988 |
| Eclipse South West Construction Ltd | Construction | 2018 |
| Eclipse South West Developments Limited | Construction | 2022 |
| Eclipse South West Services Limited | Real estate | 1999 |
| Ecme Ltd | Manufacturing | 2025 |
| Eco Asset Finance Limited | Financial services | 2008 |
| Eco Biotechnics Limited | Professional & scientific | 2026 |
| Eco Brick and Stonework Ltd | Construction | 2024 |
| Eco Cleaning Bristol Limited | Real estate | 2022 |
| Eco Clifton Ltd | Wholesale & retail | 2023 |
| Eco Conversions (SW) Ltd | Construction | 2019 |
| Eco Conversions Ltd | Construction | 2023 |
| Eco Draft Systems Ltd | Extraterritorial | 2024 |
| Eco Drain Care Ltd | Water & waste | 2022 |
| Eco Electric FIX Ltd | Construction | 2015 |
| Eco Electrical Bristol Ltd | Construction | 2020 |
| Eco Electrical Solutions (Bristol) Ltd | Information & communication | 2015 |
| Eco Elements Limited | Wholesale & retail | 2019 |
| Eco Explorer Ltd | Information & communication | 2025 |
| Eco FIX UK Energy Solutions Ltd | Construction | 2022 |
| Eco Focus CIC | Other services | 2020 |
| Eco Grants Team Ltd | Wholesale & retail | 2007 |
| Eco Home Property Ltd | Real estate | 2025 |
| Eco Home UK Group Ltd | Construction | 2020 |
| Eco Hygiene Care Ltd | Wholesale & retail | 2014 |
| Eco Loft Insulations Ltd | Administrative & support | 2019 |
| Eco Merch Global Ltd | Wholesale & retail | 2026 |
| Eco Modular Housing Ltd | Manufacturing | 2024 |
| Eco Moura Cleaning Ltd | Administrative & support | 2026 |
| Eco Properties (SW) Ltd | Real estate | 2019 |
| Eco Properties Limited | Hospitality | 2006 |
| Eco Roofing (Park Homes) Limited | Construction | 2022 |
| Eco Sheen Cleaning Ltd | Administrative & support | 2024 |
| Eco Sheen Ltd. | Administrative & support | 2019 |
| Eco Source Building Limited | Construction | 2015 |
| Eco Taxi Bristol Ltd | Transport & logistics | 2024 |
| Eco-Atomic Consultants Ltd | Professional & scientific | 2009 |
| Eco-Solutions Limited | Manufacturing | 1996 |
| Eco-Tek Solutions Limited | Manufacturing | 2025 |
| ECO2 Energy Saving Limited | Professional & scientific | 2008 |
| Ecobars Event Management Ltd | Hospitality | 2019 |
| Ecobright Cleaning Ltd | Administrative & support | 2024 |
| Ecocart Store Ltd | Wholesale & retail | 2024 |
| Ecocean Limited | Information & communication | 2024 |
| Ecocetera Limited | Construction | 1998 |
| Ecocrock Limited | Wholesale & retail | 2025 |
| Ecofield Limited | Construction | 2013 |
| Ecog Pro Limited | Information & communication | 2018 |
| Ecogen Energy Solutions Ltd | Professional & scientific | 2022 |
| Ecogrovee Limited | Wholesale & retail | 2025 |
| Ecoheat Mechanical Ltd | Construction | 2026 |
| Ecolec Electrical Ltd | Manufacturing | 2021 |
| Ecolife Group Ltd | Wholesale & retail | 2010 |
| Ecolizard Limited | Information & communication | 2012 |
| Ecomgrove Ltd | Wholesale & retail | 2025 |
| Ecomrisecart Ltd | Wholesale & retail | 2026 |
| Ecomvanta Ltd | Wholesale & retail | 2025 |
| Econexus | Professional & scientific | 2007 |
| Ecooffice Furniture Clearance Ltd | Wholesale & retail | 2025 |
| Ecoplumb (Cornwall) Ltd | Other services | 2022 |
| Ecoprime Cleaning Limited | Administrative & support | 2026 |
| Ecostep Limited | Water & waste | 2007 |
| Ecosurety Limited | Information & communication | 2003 |
| Ecotainment Ltd | Professional & scientific | 2025 |
| Ecotec Heating & Solar Ltd | Construction | 2026 |
| Ecotec Plumbing and Heating Ltd | Construction | 2006 |
| Ecotech Controls Limited | Construction | 2022 |
| Ecotechrecovery Ltd | Information & communication | 2024 |
| Ecotecnic Plumbing and Heating Ltd | Construction | 2021 |
| Ecotribo Ltd | Manufacturing | 2011 |
| Ecowild Community Interest Company | Health & social care | 2013 |
| Ecozinc Ltd | Construction | 2025 |
| ECP Property Limited | Real estate | 2022 |
| ECP2 Ltd | Real estate | 2018 |
| Ecpz Ltd | Wholesale & retail | 2025 |
| ECS Enterprises Ltd | Wholesale & retail | 2013 |
| ECS Installations Ltd | Construction | 2021 |
| ECS26 Ltd | Information & communication | 2012 |
| Ectria Limited | Professional & scientific | 2017 |