| Explora Nautica Ltd | Harrow | 2023 |
| Explora Travel Ltd | Smethwick | 2009 |
| Explorabee Ltd | Neston | 2021 |
| Explorable World Ltd | Glasgow | 2025 |
| Exploration Associates Limited | Alnwick | 2014 |
| Explore Cloud Limited | Reading | 2017 |
| Explore Data Limited | Reading | 2017 |
| Explore Digital Ltd | Warrington | 2017 |
| Explore Engineering Limited | Reading | 2009 |
| Explore Fitness Limited | Knottingley | 2020 |
| Explore Healthcare Limited | Reading | 2009 |
| Explore HR Limited | Reading | 2009 |
| Explore Interiors Ltd | Belfast | 2007 |
| Explore Limited | Warrington | 2015 |
| Explore Manchester Limited | Liverpool | 2023 |
| Explore Mobile Limited | Reading | 2017 |
| Explore Opensource Limited | Reading | 2017 |
| Explore Plant Hire Limited | Warrington | 2017 |
| Explore Security Limited | Reading | 2017 |
| Explore Technology Limited | Reading | 2017 |
| Explore Therapy Ltd | Doncaster | 2025 |
| Explore Your Dream Limited | London | 2023 |
| EXPLORENOW360 Ltd | Par | 2024 |
| Explorer International Investment Co., Ltd | Manchester | 2011 |
| Expo Experiences Limited | Little Linford | 2016 |
| Expo Products Limited | Potters Bar | 2012 |
| Exponential Growth Ltd | London | 2013 |
| Exponential Property Limited | Hampton | 2019 |
| Export Africa Limited | Waterlooville | 1998 |
| Export Growth Partners Limited | Manchester | 2018 |
| Export Ltd | London | 2002 |
| Export Vehicle Sales Limited | Nottingham | 2015 |
| Exposure Photo Marketing Limited | Crewe | 2018 |
| Expowell Limited | Slough | 2002 |
| Express 2 YOU Limited | North Yorkshire | 2005 |
| Express Aggregates Limited | London | 2025 |
| Express Alloys Ltd | Cleckheaton | 2024 |
| Express Baggage Company Limited | Hayes | 1989 |
| Express Charters Limited | Eastbourne | 2013 |
| Express Engineering Group Holdings Limited | Gateshead | 2025 |
| Express Finance Limited | Basildon | 1994 |
| Express Handling (Scotland) Limited | Edinburgh | 1998 |
| Express Higher Limited | Poole | 2024 |
| Express Kulcha Ltd | Slough | 2019 |
| Express Newspapers Properties Limited | Liverpool | 1969 |
| Express Organic Limited | Harrogate | 2026 |
| Express Packaging Limited | West Midlands | 1982 |
| Express Park (Kettering) Management Limited | Kimbolton | 1993 |
| Express Radiators (East Anglia) Limited | Wisbech | 1998 |
| Express Refrigeration Limited | Hellidon | 1991 |
| Express Removals Limited | Clydebank | 1982 |
| Express Rifles Ltd | Near Rugby | 2011 |
| Express Rooms Ltd | Leeds | 2011 |
| Express Shopfittings Limited | Nottingham | 2000 |
| Express Taxis Tonbridge Ltd | Maidstone | 2013 |
| Express Windscreens Ltd | Witney | 2025 |
| Expresscal Ltd | Sunningdale | 2011 |
| Expresservice Sweden Limited | London | 2021 |
| Expressft Limited | Manchester | 2017 |
| Expressions Limited | Richmond | 1995 |
| Expressway Marine Limited | Wolverhampton | 1976 |
| Exproco Limited | London | 2008 |
| Exquisite Edge Furniture Ltd | Bourne | 2024 |
| Exspresso Ltd | Plymouth | 2010 |
| Extay Industry Co., Ltd | London | 2013 |
| Extc Limited | Swindon | 2019 |
| Extec Mobile Crushers & Screens Limited | Halesowen | 2003 |
| Extensa Clinic T/A Oxford Natural Longevity and Aesthetics Clinic Ltd | Liverpool | 2021 |
| Exterior Lighting Solutions (UK) Ltd | Newbury | 2005 |
| Exterior Ltd | London | 2025 |
| Exterior Wonders Limited | Uxbridge | 2023 |
| External Accounting Limited | Norwich | 2012 |
| External Accounts Services Limited | Norwich | 2017 |
| External Director Limited | Norwich | 2022 |
| External FD Ltd | Croxley Green | 2016 |
| External Legal Services Limited | Norwich | 2017 |
| External Nominees Limited | Norwich | 2010 |
| External Officer Limited | Norwich | 2010 |
| External Secretary Limited | Norwich | 2022 |
| External Trustees Limited | Norwich | 2012 |
| Exton Estates Developments Limited | London | 2015 |
| Extra Excellent Limited | London | 2014 |
| Extra GAS (UK) Ltd | Warrington | 2014 |
| Extra GAS Limited | Eccles | 2002 |
| Extracare Nominee 1 Limited | Coventry | 2010 |
| Extracare Nominee 2 Limited | Coventry | 2010 |
| Extractions Premium & Mining Ltd | London | 2023 |
| Extran Limited | York | 2002 |
| Extraordinary Voice Global Art League | London | 2019 |
| Extrastake Property Management Limited | Watford | 1986 |
| Extraterrestrial Strategy Research Academy | Kenilworth | 2017 |
| Extravaganza Limited | Loughborough | 2009 |
| Extreme Autoclean Limited | Beckenham | 2006 |
| Extreme Body Repairs Ltd | Poole | 2009 |
| Extreme Cool Holdings Limited | Worcester | 2010 |
| Extreme Frontier Ltd | Warwick | 2013 |
| Extreme Hangout Ltd | Sudbury | 2016 |
| Extreme Motocross Limited | Winterbourne | 2010 |
| Extreme Sports Channel Limited | Sudbury | 2014 |
| Extreme-Extreme Limited | Nottingham | 2005 |