| Ecosecurities Limited | Professional & scientific | 2011 |
| Ecosism Construction Services Limited | Manufacturing | 2022 |
| Ecosystem Capital Limited | Agriculture & fishing | 2020 |
| ECP Legal Services Ltd | Professional & scientific | 2024 |
| Ecrin Investments Limited | Professional & scientific | 2012 |
| ED4GON Limited | Administrative & support | 2020 |
| Eden Quest Ltd | Wholesale & retail | 2026 |
| Eden UK Real Estate Ltd | Real estate | 2025 |
| Edgeworth Motors Limited | Wholesale & retail | 2025 |
| EDI Build & Property Services Ltd | Construction | 2026 |
| Edimertwo Ltd | Public administration | 2017 |
| Edinburgh Economics Limited | Professional & scientific | 2003 |
| Edit Landscape Design Ltd | Professional & scientific | 2012 |
| EDM Management Limited | Real estate | 2023 |
| EDT Solutions Ltd | Information & communication | 2006 |
| Edtc PC Limited | Real estate | 2021 |
| Edubridge BM Ltd | Education | 2026 |
| Educare Direct Ltd | Administrative & support | 2020 |
| Eduplanets Oxford Limited | Education | 2023 |
| Edutainment for Youth | Education | 2014 |
| Edwance Education Ltd | Administrative & support | 2025 |
| Edward Court Management Company (Wolvercote) Limited | Households | 1981 |
| Edwin Court Residents Association Limited | Households | 1978 |
| Eezy PAY Ltd | Administrative & support | 2023 |
| EF International Academy UK Limited | Education | 2005 |
| Effective Business Growth Limited | Other services | 2012 |
| Effective Event Solutions Ltd | Arts & recreation | 2004 |
| Effective Events Ltd | Administrative & support | 2026 |
| Effective Psychotherapy Ltd | Health & social care | 2013 |
| Effective Travel Solutions Ltd | Administrative & support | 2005 |
| Effective Ventures Foundation (UK) | Education | 2012 |
| Effectivus Ltd | Information & communication | 2008 |
| Effen Ltd | Energy | 2025 |
| Effizia Strategic Partners Ltd | Professional & scientific | 2025 |
| Effway and Co Limited | Hospitality | 2022 |
| Efjayai Ltd | Wholesale & retail | 2024 |
| Eflouis Limited | Health & social care | 2026 |
| Efxentis Ltd | Professional & scientific | 2025 |
| Eggevents Limited | Administrative & support | 2000 |
| Eggroll Labs Limited | Professional & scientific | 2026 |
| EGL Holdings Limited | Professional & scientific | 1998 |
| Eglantine Hallo Osteopathy Ltd | Health & social care | 2024 |
| EH Writing Ltd | Other services | 2024 |
| Ehji Limited | Professional & scientific | 2015 |
| Ehuddle Ltd | Information & communication | 2021 |
| EHY World Store Ltd | Wholesale & retail | 2024 |
| EID Extravaganza | Health & social care | 2019 |
| Eiden Limited | Construction | 2022 |
| Eigentail Ltd | Professional & scientific | 2026 |
| Eight Property Limited | Construction | 2008 |
| Eight South Parade Limited | Hospitality | 2026 |
| Eirix Biotech Private Limited | Manufacturing | 2024 |
| EIS - Axon Limited | Construction | 1991 |
| EIT Tosp Holdco Limited | Financial services | 2022 |
| EIT Tosp Propco Limited | Real estate | 2022 |
| Ej-W Real Limited | Real estate | 2021 |
| EL Almeida Limited | Transport & logistics | 2025 |
| EL Corchuelo Ltd | Financial services | 2024 |
| EL Learning Design Limited | Professional & scientific | 2022 |
| EL Olam Healthcare Services Ltd | Health & social care | 2021 |
| El-Halal Bucks Ltd | Hospitality | 2020 |
| El.One Style Ltd | Manufacturing | 2022 |
| Elabela Ltd | Professional & scientific | 2026 |
| Elaine Barker Limited | Professional & scientific | 2003 |
| Elanneth Limited | Information & communication | 2005 |
| ELC Properties Ltd | Real estate | 2026 |
| Elderlight Limited | Professional & scientific | 2006 |
| Electric 88 Ltd | Construction | 2017 |
| Electric Breeze Audio Productions Ltd | Information & communication | 2010 |
| Electrical Express Online UK Ltd. | Wholesale & retail | 2012 |
| Electricglobalmedia Limited | Professional & scientific | 2025 |
| Elegant Cuisine Limited | Hospitality | 2004 |
| Elegant ELK Ltd | Wholesale & retail | 2024 |
| Elegent Car Wash Ltd | Administrative & support | 2024 |
| Element Studios Consulting Ltd | Professional & scientific | 2015 |
| Element Studios Design Ltd | Construction | 2006 |
| Elementary Engineering PTY Ltd | Professional & scientific | 2018 |
| Eleni Nicholas Consulting Limited | Professional & scientific | 2022 |
| Eleon Limited | Administrative & support | 2014 |
| Eleos Advisory Ltd | Professional & scientific | 2018 |
| Elephant Sandwich Limited | Information & communication | 2024 |
| Elevage PLC | Financial services | 2023 |
| Elevasion Property Group Ltd | Construction | 2026 |
| Elevatus Homes Ltd | Construction | 2021 |
| Elezi Homes Limited | Real estate | 2026 |
| Elezi Property Management Ltd | Hospitality | 2025 |
| Elias Jones Group Ltd | Wholesale & retail | 2020 |
| Elipsyx Ltd | Information & communication | 2021 |
| Eliquigen Limited | Extraterritorial | 2014 |
| Elite British Tutors Ltd | Education | 2024 |
| Elite Electrical Oxfordshire Limited | Construction | 2023 |
| Elite of Oxford Limited | Hospitality | 2023 |
| Elite Prestige and Private Hire Limited | Transport & logistics | 2008 |
| Elite Rides Oxford Ltd | Transport & logistics | 2024 |
| Elite Travel Oxford Ltd | Transport & logistics | 2024 |
| Elitestorm UK Limited | Administrative & support | 2024 |
| Elitious Ltd | Transport & logistics | 2026 |
| Eliwise Academy Ltd | Information & communication | 2020 |
| Elizabeth House Abingdon Ltd | Real estate | 2024 |
| Elizabeth Rhodes Ltd | Professional & scientific | 2024 |