| Essex County Cricket Club Nominees Limited | Chelmsford | 1991 |
| Essex County Cricket Promotions Limited | Chelmsford | 1980 |
| Essex County Football Association Limited | Springfield, Chelmsford | 1999 |
| Essex County Preservation Trust Ltd | Leigh On Sea | 2008 |
| Essex Cricket Foundation | Chelmsford | 2010 |
| Essex Cricket in the Community | Chelmsford | 2006 |
| Essex Cricket Limited | Chelmsford | 1998 |
| Essex Dance Studios Ltd | Colchester | 2020 |
| Essex Eagles Limited | Chelmsford | 1998 |
| Essex Elite Football Coaching Ltd | Colchester | 2014 |
| Essex Elite Massage & Sports Therapy Ltd | South Woodham Ferrers | 2024 |
| Essex Elite Sports Academy Ltd | Elmstead, Colchester | 2023 |
| Essex Fashion Week Limited | Wickford | 2011 |
| Essex Film Collective Community Interest Company | London | 2021 |
| Essex Games Ltd | Billericay | 2023 |
| Essex Girl Productions Ltd | Braintree | 2019 |
| Essex Gliding Club Limited | Southend-On-Sea | 1960 |
| Essex Golf LAB Limited | Maldon | 2024 |
| Essex Golf Studio Limited | Ongar | 2026 |
| Essex Golfer Limited | Ipswich | 2016 |
| Essex Grassroots Analysis Ltd | Westcliff-On-Sea | 2022 |
| Essex Health & Fitness Limited | Chelmsford | 2011 |
| Essex Home Fitness Ltd | South Ockendon | 2003 |
| Essex Hydroplane Racing Club Limited | Ipswich | 1981 |
| Essex Inflatables Ltd | Chelmsford | 2026 |
| Essex JET SKI Centre Limited | Cranes Farm Road | 1989 |
| Essex JIU Jitsu Open Ltd | Wickford | 2021 |
| Essex Land Rover Club Limited | Rainham | 1987 |
| Essex Leisure & Recreational Ltd | West Horndon | 2014 |
| Essex Leisure ( Gants Hill ) Limited | St. Albans | 2019 |
| Essex Lions CC Limited | London | 2024 |
| Essex Music Development Agency CIC | Romford | 2017 |
| Essex Nights OUT Limited | Ongar | 2020 |
| Essex Padel Yard Limited | Ramsden Bellhosue | 2026 |
| Essex Pamper BUS Ltd | Benfleet | 2024 |
| Essex Photo Booth Hire Limited | Hornchurch | 2016 |
| Essex Piano Tuner Limited | Brentwood | 2020 |
| Essex Pole & Tone Limited | Romford | 2023 |
| Essex Promotions Ltd | Loughton | 2024 |
| Essex Reformer Co Ltd | Hornchurch | 2026 |
| Essex Ringside Boxing Club Limited | Hornchurch | 2021 |
| Essex Road Productions Limited | London | 2026 |
| Essex Rocks Creative CIC | Dovercourt | 2026 |
| Essex Rocks Promotions Ltd | Colchester | 2023 |
| Essex Senior Football League Limited | Harlow | 2024 |
| Essex Singles Night Ltd | London | 2025 |
| Essex Soft Play BUS Ltd | Benfleet | 2023 |
| Essex Sports Enterprise Limited | Southend-On-Sea | 2012 |
| Essex Sports Limited | Fryerning | 1983 |
| Essex Sports Massage Limited | Chelmsford | 2023 |
| Essex Strength and Conditioning Limited | Southend-On-Sea | 2016 |
| Essex Stretch Academy Limited | Chelmsford | 2014 |
| Essex Studios Ltd | Bishop'S Stortford | 2023 |
| Essex Swifts Basketball Club Limited | Northampton | 1996 |
| Essex Swimming Academy Limited | Bishop'S Stortford | 2012 |
| Essex Symphony Orchestra Productions Limited | Chelmsford | 2022 |
| Essex TAP Group Limited | Leigh-On-Sea | 2019 |
| Essex Theatre Arts Performance Limited | Colchester | 2026 |
| Essex Waterways Limited | Chelmsford | 2005 |
| Essex Waterways Navigation Trust | Chelmsford | 2024 |
| Essex Weightlifting Club Ltd | Colchester | 2016 |
| Essex Yacht Club Limited | Essex | 1930 |
| Essi Textile Ltd | Llangollen | 2021 |
| Essika Limited | London | 2012 |
| Essington Rugby Club Trading Limited | Wolverhampton | 2016 |
| Essington Rugby Union Football Club Limited | Essington | 2009 |
| Essr Sports & Wellness Initiatives Ltd. | Manchester | 2012 |
| EST 1954 Records Ltd | Wellington | 2008 |
| EST. 28 Ltd | Newry | 2021 |
| EST28 PT Ltd | Banbridge | 2026 |
| Esta Charkham Associates Ltd | London | 2024 |
| Esta Padel Clubs Limited | Glasgow | 2025 |
| Establish Ltd | London | 2010 |
| Established Entertainment Ltd | Paisley | 2020 |
| Estad Sports Management Ltd | Reading | 2019 |
| Estafest CIC | March | 2024 |
| Estate of Anwar Jalal Shemza Ltd | Eastbourne | 2024 |
| Estate of Balraj Khanna Limited | London | 2025 |
| Estate of IAN P Mclagan Ltd | Brighton | 2015 |
| Estate of the Arts Ltd | Bath | 2020 |
| Estate Resources & Management Limited | Wimborne | 1991 |
| Este Macleod Art Limited | Reading | 2021 |
| Estec Ltd | Enfield | 2021 |
| Esteem Wellness Ltd. | Sheffield | 2006 |
| Estefanoonatrac Photography Limited | London | 2021 |
| Estel Consult Ltd | Binfield | 2011 |
| Esteni and Co Limited | London | 2022 |
| Ester Works Ltd | Manchester | 2026 |
| Estetics (UK) Limited | Consett | 2006 |
| Esthete Studio Limited | Cardiff | 2025 |
| Esthetika Ltd | Exeter | 2022 |
| Estrela Ltd | Borehamwood | 2024 |
| Estuary Creative Limited | Leigh-On-Sea | 2006 |
| Estupendo Records Limited | London | 1996 |
| Esuna Studio Limited | Doncaster | 2026 |
| ESV International Ltd. | London | 2021 |
| Esvdra Ltd | Coventry | 2024 |
| ESW Motorsports Ltd | Brentwood | 2023 |
| ESW Solutions Ltd | Newton Abbot | 2024 |
| ET AL Music. Ltd | Manchester | 2025 |