| Accel Systems Limited | London | 1999 |
| Accelerate Automotive Ltd | London | 2025 |
| Accelerated Education Limited | Feltham | 2004 |
| Accelerator Software Limited | West End Surrey | 2006 |
| Accelerox Limited | Oxford | 2008 |
| Accellerate Forex Traders Ltd | London | 2024 |
| Accent Engineering Ltd | Mirfield | 2022 |
| Access 2 Access Limited | Leicestershire | 2006 |
| Access 2 Car Credit Limited | London | 2007 |
| Access 2 Credit Limited | London | 2007 |
| Access 2 Safety Limited | Notts | 2006 |
| Access 2 Spectrum Limited | London | 2003 |
| Access Advise Ltd | Newcastle Upon Tyne | 2025 |
| Access ALL Property Ltd | Witney | 2022 |
| Access Assured Limited | Macclesfield | 2018 |
| Access Biotech Consulting Ltd | Rugby | 2011 |
| Access Coding Limited | London | 2014 |
| Access Estates Limited | London | 2002 |
| Access Floor Systems Limited | Kettering | 1973 |
| Access Garage Doors and Gates Limited | Crawley | 1989 |
| Access Holdings Limited | Crawley | 2008 |
| Access Industrial Doors Limited | Dudley | 2005 |
| Access Ladders Limited | Northallerton | 2011 |
| Access Locksmiths Limited | Whiteley | 2016 |
| Access Mobility Limited | Bolney | 1994 |
| Access Nominees Limited | Elstree | 1994 |
| Access Pro Ltd | Wigan | 2016 |
| Access Recycle Ltd | Loughton | 2015 |
| Access Scaffolding (South) Limited | Ashford | 2016 |
| Access to Compensation Limited | Manchester | 2004 |
| Access Trading Limited | London | 2021 |
| Access Visa Services Ltd | Isleworth | 2025 |
| Accessa Ltd | Kendal | 2025 |
| Accessacademy International Limited | Stevenage | 2011 |
| Accessible Houses Ltd | Lytham St. Annes | 2016 |
| Accessible Vehicles Ltd | Keighley | 2016 |
| Accessible World Limited | Ambleside | 2023 |
| Accessit Data (Holdings) Ltd | Aylesbury | 2007 |
| Accessories by Teddy Ltd | Droitwich | 2025 |
| Accessories Limited | Edinburgh | 2003 |
| Accessway Management Ltd | Trowbridge | 2014 |
| Accident Advice Helpline Limited | Manchester | 2004 |
| Accident Advice Insurance Management Group Limited | Manchester | 2004 |
| Accident Claims Helpline Limited | Bideford | 2012 |
| Accident Credit Limited | Warrington | 2010 |
| Accident Express Limited | Bewdley | 2014 |
| Accident Specialists Crawley Ltd | Crawley | 2010 |
| Accident Specialists Group Ltd | Crawley | 2017 |
| Accidental Books Limited | Bristol | 2011 |
| Accindo Services Limited | London | 2008 |
| Accmera Web & Communication Ltd | London | 2005 |
| Acco Company Limited | Aylesbury | 1969 |
| Accommodation Corporation Ltd | London | 2015 |
| Accommodation Locator Ltd | London | 2014 |
| Accommodation Services (Students) Limited | Sunderland | 2012 |
| Accommodation Services (Sunderland) Limited | Sunderland | 2012 |
| Accoo Ltd | London | 2025 |
| Accor Investments Ltd | Rickmansworth | 2018 |
| Accord Environmental Services Limited | London | 1995 |
| Accord Financial Management Limited | Chorley | 2004 |
| Accord Risk Limited | Milton Keynes | 2025 |
| Account Links Ltd | Huddersfield | 2022 |
| Account Office Ltd | Milton Keynes | 2013 |
| ACCOUNT2ACCOUNT Limited | Hertfordshire | 2000 |
| Accountancy & Taxation Centre Limited | Tunbridge Wells | 2021 |
| Accountancy 4 Growth Limited | Staffordshire | 1999 |
| Accountancy Careers Limited | Bracknell | 1981 |
| Accountancy Connections Ltd | Brighton | 2011 |
| Accountancy Matters (South East) Limited | Farnborough | 2010 |
| Accountancy Options Limited | Eastbourne | 2021 |
| Accountancy Recruitment Limited | Southampton | 1996 |
| Accountancy.Co.Uk Limited | London | 2003 |
| Accountant Berkhamsted Limited | Berkhamsted | 2022 |
| Accountants and Tax Advisers Limited | Nantwich | 2000 |
| Accountants in Practice Ltd | Dorking | 2008 |
| Accountants Marketplace Ltd | Stratford-Upon-Avon | 2021 |
| Accountants Waterlooville Limited | Waterlooville | 2019 |
| Accountax Help Centre Limited | Mansfield | 2011 |
| Accountax Law Ltd | London | 2008 |
| Accountax Secretarial Ltd | Glasgow | 2004 |
| Accounting & Bookkeeping Solution Specialists Limited | Diss | 2018 |
| Accounting & Business Consultancy Limited | Milton Keynes | 1999 |
| Accounting - Buddy Ltd | Leeds | 2013 |
| Accounting BEE Limited | High Wycombe | 2002 |
| Accounting Blockchain Ltd | London | 2018 |
| Accounting Services Direct Limited | Shepperton | 2008 |
| Accounting Software and Services Limited | High Wycombe | 1994 |
| Accountomatic Limited | East Coker | 2020 |
| Accounts & Returns (London) Limited | Warwick | 2016 |
| Accounts & Tax World Limited | London | 2018 |
| Accounts Control Limited | London | 2022 |
| Accounts Department Online Limited | Leeds | 2006 |
| Accounts LAB Limited | Carshalton | 2025 |
| Accounts Rescue Ltd | Stamford | 2018 |
| Accounts Today Ltd | Ipswich | 2023 |
| Accounts Yard Limited | London | 2024 |
| Accountscompiler Limited | Harrow | 2015 |
| Accountsify Limited | Belfast | 2013 |
| Accountswise Ltd | Birmingham | 2020 |
| Accountum Corporate Secretary Limited | London | 2013 |