| Exentia Ltd | London | 2018 |
| Exergy Risk Ltd | London | 2024 |
| Exersci Ltd | Rossendale | 2021 |
| Exertion Group Ltd | Rossendale | 2023 |
| Exeter & District Funeral Service Limited | Nottingham | 2010 |
| Exeter and Devon Crematorium Limited | Sutton Coldfield | 1963 |
| Exeter Caravan Centre Ltd | Exeter | 2006 |
| Exeter Concrete Pumping Limited | Torquay | 2012 |
| Exeter Flying School Ltd | Exeter | 1996 |
| Exeter Investments Limited | Truro | 2015 |
| Exeter Mobile Tyres Limited | Exeter | 2025 |
| Exeter Motor Group Limited | Devon | 1979 |
| Exeter Mots Ltd | Exeter | 2015 |
| Exeter Retail Nominees 1 Limited | Manchester | 2021 |
| Exeter Travel Limited | Honiton | 2008 |
| Exeter Tyres Limited | Exeter | 2025 |
| Exgres Limited | Leeds | 2010 |
| Exhale Counselling & Psychotherapy Ltd | London | 2022 |
| Exhaust Coating UK Limited | Harleston | 2011 |
| Exhibit Green Limited | Leeds | 2008 |
| Exhibit LA Limited | Sheffield | 2021 |
| Exhibition Floor Hire Limited | Walsall | 1994 |
| Exhibition Ltd | London | 2003 |
| Exhort Limited | Daventry | 2013 |
| Exicon UK Limited | London | 2013 |
| Exim Software Limited | Tring | 2004 |
| Eximgo Ltd | Kettering | 2008 |
| Exiol International Limited | London | 2017 |
| Exion Limited | London | 2021 |
| Exira Limited | Chester | 2013 |
| Exitmaster Ltd | Leighton Buzzard | 2024 |
| Exitum Limited | Cleckheaton | 2012 |
| Exmode Limited | London | 2008 |
| Exmoor Asset Management Limited | Truro | 2015 |
| Exmoor Holiday Lets Ltd | Minehead | 2025 |
| Exmoor Sporting Limited | South Molton | 2008 |
| Exmouth Car Breakers Limited | Exeter | 2013 |
| Exmouth House GP Limited | Grantham | 2017 |
| Exmouth Integrated Therapies Ltd | Exmouth | 2023 |
| Exmouth Market Limited | Oxford | 2007 |
| Exmouth Trade Frames (South West) Ltd | Exmouth | 2016 |
| Exnova Export Ltd | Doncaster | 2026 |
| EXO Invest Limited | Pencoed, Bridgend | 2007 |
| Exoak Limited | Telford | 2016 |
| Exogenix Ltd | Westbury On Trym | 2019 |
| Exon Mews Amenity Limited | Exeter | 2004 |
| Exos Asset Management Limited | Beverley | 2021 |
| Exothermic Ltd | Swindon | 2020 |
| Exotic Blends Ltd | Pinner | 2025 |
| Exotic Coconut Ltd | London | 2019 |
| Exotic Designs Limited | Norwich | 2022 |
| Exotic Resorts Limited | Brighton | 1997 |
| Exotra Quorixa Solutions Ltd | Manchester | 2026 |
| Exp-O-Tech (INT) Limited | Leigh | 1986 |
| Expac Ltd | Beckenham | 2014 |
| Expamet Fencing Limited | Hartlepool | 2002 |
| Expansar Limited | London | 2012 |
| Expanse Factory Racing Limited | Leeds | 2018 |
| Expansive Care Solution Limited | Coventry | 2023 |
| Expat People Limited | Fulmer | 1989 |
| Expats Property Investors Ltd | Wellingborough | 2023 |
| EXPD8 FM Limited | Bristol | 2009 |
| EXPD8 UK Limited | Bristol | 2009 |
| Expect Warehousing Limited | Brighouse | 2005 |
| Expected Marketing Solutions Limited | Prudhoe | 2023 |
| Expedia Capital (Banbridge) Limited | Belfast | 2017 |
| Expedite Business Solutions Limited | Weston - Super - Mare | 1996 |
| Expedro INT. Limited | London | 2018 |
| Experience Archery Ltd | London | 2011 |
| Experience Bedfordshire - the Tourism Partnership CIC | Dunstable | 2012 |
| Experience Life Differently Limited | Chester | 2015 |
| Experienceni Ltd | Bangor | 2025 |
| Experium Financial Services Ltd | Eastbourne | 2014 |
| Expert Advisor Tech., Co., Limited | Manchester | 2012 |
| Expert Advisory & Research Services Limited | Bexhill On Sea | 2010 |
| Expert Carpet Cleaning Services Ltd | Northampton | 2025 |
| Expert Edge Realty Ltd | Manchester | 2026 |
| Expert Energy Systems Limited | Stockton-On-Tees | 2009 |
| Expert for International Services Limited | Manchester | 2026 |
| Expert Formations Ltd | Manchester | 2019 |
| Expert Ltd | Coventry | 2003 |
| Expert Mortgages Ltd | Bristol | 2015 |
| Expert Peak Business Solutions Ltd | Manchester | 2026 |
| Expert Peak Solutions Ltd | Manchester | 2026 |
| Expert Power Limited | Alderley Edge | 2018 |
| Expert Property Repairs Wirral Limited | Wirral | 2022 |
| Expert Remarketing Limited | Hook | 2010 |
| Expert Service Pros Ltd | Manchester | 2026 |
| Expert Service Realty Squad Ltd | Manchester | 2026 |
| Expert Technologies Limited | Coventry | 2020 |
| Expert Wealth Management Limited | Witney | 2011 |
| Expert Witnesses Limited | Shoreham-By-Sea | 2013 |
| Expertage Limited | Lewes | 2004 |
| Expertise Property Services Limited | Chelmsford | 2019 |
| Expertpro Limited | Leeds | 2021 |
| Expetro Energy Service Co., Ltd | Kenilworth | 2024 |
| Expgeo Limited | Mansfield | 1991 |
| Expiation International UK Limited | Leicester | 2019 |
| Explainable AI (XAI) Healthcare Systems Ltd | Folkestone | 2021 |
| EXPLOIT4U Limited | Swansea | 2001 |