| Accouter Limited | London | 2001 |
| Accouve Limited | Worthing | 2008 |
| Accralite Limited | Halesowen | 2003 |
| Accredited Commercial Finance Limited | Mancheter | 2008 |
| Accredited Surveys Limited | London | 1999 |
| Accrington Gardens and Allotments Limited | Darwen | 1989 |
| Accrington Plastics Ltd | Solihull | 2010 |
| Accrue Accounting Limited | Poole | 2023 |
| Accsend Limited | Peterborough | 2015 |
| Accsio Trading Co., Ltd | Beckenham | 2025 |
| Acctx Consulting Limited | London | 1999 |
| Acctx UK Limited | London | 1996 |
| Accu Europe Ltd | Huddersfield | 2024 |
| Accucount Ltd | Watford | 2014 |
| Accuman Agencies Limited | Market Harborough | 2020 |
| ACCUMUL8 Ltd | London | 2020 |
| Accuratepay Solutions Ltd | Borehamwood | 2022 |
| Accuratus Manufacturing Limited | Kingsley | 2014 |
| Accurist Watches Limited | London | 2014 |
| Accurite Machinery Limited | Ulverston | 2021 |
| Accurro Software Ltd | London | 2017 |
| Accusense Systems Limited | London | 1999 |
| Accusound Limited | Doncaster | 1990 |
| Accuvision Eyecare Limited | Greater London | 2001 |
| ACD Ecology Limited | Wickford | 2009 |
| Acdc CN Ltd | Beckenham | 2021 |
| Acdf Health Limited | Bridgend | 2023 |
| Ace Base Fields Limited | Bridport | 2007 |
| Ace Business Services Limited | Great Dunmow | 1998 |
| Ace Cafe Events Limited | Southport | 2010 |
| Ace Cars (Bedford) Limited | Bedford | 2013 |
| Ace Commodities Trading Limited | Plymouth | 2010 |
| Ace Dent Holdings Limited | Essex | 1997 |
| Ace Diets Limited | Christchurch | 2011 |
| Ace Electric Vehicle Co., Ltd | Cambridge | 2018 |
| Ace Electrical Contracts Ltd | Tranent | 2024 |
| Ace Energy Limited | Halifax | 2008 |
| Ace Family Care Ltd | Bilston | 2024 |
| Ace Fixings (Ireland) Ltd | Ballymena | 2005 |
| Ace Fork Lift Training Limited | Sawbridgeworth | 2004 |
| Ace Global (London) Ltd | Yateley | 2025 |
| Ace Handling Limited | Rugby | 2009 |
| Ace III Managing Member Limited | Edinburgh | 2015 |
| Ace III Second Member Limited | Edinburgh | 2015 |
| Ace Industrial Supplies Limited | Tonbridge | 2023 |
| Ace Industrial Training Ltd | Sawbridgeworth | 2004 |
| Ace Kids Limited | Farnborough | 2025 |
| Ace MAG Limited | Sheffield | 2009 |
| Ace Marketplace Ltd | Kettering | 2024 |
| Ace Meter Technology Co., Limited | Cambridge | 2019 |
| Ace Products UK. Limited | Long Stratton | 2013 |
| Ace Radio Cabs Limited | Thornton-Cleveleys | 2023 |
| Ace Recruitment (UK) Ltd | Bexley | 2006 |
| Ace Transport Leicester Limited | Leicester | 2010 |
| Ace UK (Tanks) Ltd | Farnham | 2022 |
| Ace Ultimate Limited | Beckenham | 2012 |
| Ace Ventures Limited | London | 2004 |
| Ace Vision Euro Ltd | Oxford | 2010 |
| Ace-Abc (Mansfield) Limited | Nottingham | 1999 |
| Acea Holdings Limited | Preston | 2020 |
| Acea Properties Ltd | Preston | 2018 |
| Acecroft Limited | Bridgend | 2024 |
| Acedinca Ltd. | Soham | 2016 |
| Acegrind Limited | London | 1994 |
| Acehart Limited | Kenilworth | 1974 |
| Acekom Ltd | Chatham | 2015 |
| Acel Properties Ltd | Edgware | 2016 |
| Acellia Ltd | London | 2025 |
| Acellma Ltd | London | 2025 |
| Acellna Ltd | London | 2025 |
| Acellty Ltd | London | 2025 |
| Acepath Ltd | London | 2018 |
| Acer Equipment Limited | Sowerby Bridge | 2005 |
| Acer Project Management Ltd | Solihull | 2023 |
| Acer RTM Company Limited | Bushey | 2026 |
| Acerit Limited | Hinckley | 2005 |
| Aceroxy Ltd | London | 2001 |
| Aces Consultant Limited | Bathgate | 2010 |
| Aces Tech Limited | Sutton | 2017 |
| ACESHARE1 Ltd | Waltham Cross | 2023 |
| Aceso Health & Group Risk Limited | Leeds | 2021 |
| Acetech Aluminium Ltd | Hull | 2019 |
| Acetech Construction Ltd | Barrow Haven | 2015 |
| Acetech Engineering Limited | Hull | 2020 |
| Aceto Agricultural Chemicals Corporation Limited | Chester | 2006 |
| ACF Farming Limited | Barnstaple | 2021 |
| Acfg Limited | Holmfirth | 2021 |
| Acfuture Design Limited | London | 2020 |
| ACH Motors Ltd | Boston | 2024 |
| Acheta Consulting Limited | Cheltenham | 2003 |
| Achiever Lims Ltd | Solihull | 2025 |
| Achiever Systeam Biochem Co., Ltd. | Beckenham | 2016 |
| Achill Rock Limited | Larne | 2016 |
| Achill Rock Services Limited | Ballyclare | 2016 |
| Achilleas Nikolaou Limited | London | 2008 |
| Acis Homeplus Limited | Gainsborough | 2010 |
| Acis Management Limited | Gainsborough | 2000 |
| Acis Properties Limited | Gainsborough | 2000 |
| Acivico Group Limited | Birmingham | 2023 |
| Ackergil Resources Ltd | London | 2025 |