| @Robheys Limited | Accrington | 2019 |
| @Simulationman Ltd | Andover | 2020 |
| @Software PLC | Tadley | 1999 |
| @THE4FRONT Ltd | London | 2025 |
| @Theandygarner Limited | Birmingham | 2021 |
| @Therajivsethi Ltd | Manchester | 2016 |
| @Whizcreation Limited | Bedford | 2015 |
| A + a Ltd | Cheltenham | 2020 |
| A B Management and Contract Negotiation Consultants Ltd | Airdrie | 2023 |
| A Mark Ratings Limited | Stockport | 2023 |
| A Pearson Holdings Limited | Chichester | 2008 |
| A Swain Consulting Limited | Radlett | 2010 |
| A T Graves Consultancy Ltd | Dagenham | 2022 |
| A & a Consulting Services Limited | Feltham | 2015 |
| A & a Accountants Limited | West Sussex | 2015 |
| A & a Accounting Solutions Limited | Northolt | 2018 |
| A & a Arable Limited | Lincoln | 2009 |
| A & a Asset Management Ltd | Manchester | 2018 |
| A & a Bird Holdings Ltd | Gloucester | 2020 |
| A & a Building Surveyors Limited | Oakham | 2002 |
| A & a Business Consulting Ltd | Colne | 2024 |
| A & a Cleaning and Consultancy Limited | Whitworth | 2003 |
| A & a Commercial Limited | Scarborough | 2003 |
| A & a Creative Ltd | London | 2010 |
| A & a Executive Search Limited | Gillingham | 2007 |
| A & a Fabrication and Welding Ltd | Leicester | 2016 |
| A & a Hart Ltd | York | 2018 |
| A & a Holdings Ltd | Leicester | 1997 |
| A & a Investment Southern Limited | Hurst | 2019 |
| A & a Legal Partners Limited | Maidenhead | 2025 |
| A & a Medics Ltd | Borehamwood | 2021 |
| A & a Pharma Ltd | London | 2021 |
| A & a Project 2025 Ltd | Northampton | 2024 |
| A & a Property Refurbishments Limited | Cardiff | 2005 |
| A & a Provisions Limited | Cranleigh | 2001 |
| A & a Scargill Ltd | Leeds | 2023 |
| A & a Stevens Consulting Limited | Leeds | 2016 |
| A & a Stratford Ltd | Helston | 2020 |
| A & a Surveying Services Limited | Sunderland | 2022 |
| A & a Technical Services Ltd | Burgess Hill | 2025 |
| A & a Wood Limited | Lowestoft | 2012 |
| A & AP Consultancy Limited | Solihull | 2020 |
| A & B Accountants Ltd | Dagenham | 2026 |
| A & B Bookkeeping Services Limited | Treharris | 2022 |
| A & B Consultants (North West) Limited | Leeds | 2018 |
| A & B Consultants Limited | Batley | 2015 |
| A & B Groundworkers Ltd | Leicester | 2014 |
| A & B K Limited | Middlesex | 2005 |
| A & B Law Ltd | Sheffield | 2024 |
| A & B Manchester Limited | Liverpool | 1997 |
| A & B Rose Services Ltd | London | 2023 |
| A & B Studio Limited | London | 2019 |
| A & B TTT Taxis Ltd | Edinburgh | 2013 |
| A & B Turney Limited | Market Harborough | 1989 |
| A & C Accounts and Bookkeeping Services Limited | Manchester | 2003 |
| A & C Consultants Limited | Ashford | 2018 |
| A & C Energy Surveys Ltd | Peterborough | 2014 |
| A & C Investments (Wickford) Limited | Basildon | 2014 |
| A & C Mechanical Electrical Services Ltd | East Ham | 2014 |
| A & C Platt Limited | Stockport | 2006 |
| A & C Precision Engineering Limited | Dundee | 2013 |
| A & C Project Management Ltd | Aberdeen | 2014 |
| A & C Stewart Consulting Limited | Altrincham | 2025 |
| A & C Weber UK Limited | Wirral | 2010 |
| A & C Whelan Ltd | Ely | 2020 |
| A & C Wilson Engineering Contractors Ltd | Tain | 2020 |
| A & CB Consulting Limited | Crawley | 2015 |
| A & Co Accountancy and Taxation Services Limited | Newport | 2026 |
| A & Co Accountants (NMN) Ltd | Manchester | 2011 |
| A & Co Accountants Limited | London | 2015 |
| A & Co Accounting Limited | Wharles | 2022 |
| A & D Accounting Ltd | Birmingham | 2021 |
| A & D Architecture Ltd | Chesterfield | 2013 |
| A & D Builders (Southampton) Limited | Bournemouth | 1994 |
| A & D Construction Southern Limited | Hurst | 2019 |
| A & D Consultancy London Ltd | Watford | 2020 |
| A & D Dairy Consultancy Ltd | Bath | 2018 |
| A & D Dowdy (Holdings) Limited | High Wycombe | 2016 |
| A & D Finnegan Limited | Clevedon | 2017 |
| A & D GAS Services Ltd | Upminster | 2021 |
| A & D H R Consultancy Limited | Chichester | 2006 |
| A & D HO Marketing Limited | Walsall | 2023 |
| A & D Hodge Legal Agreements Limited | London | 2003 |
| A & D Language Services Ltd | London | 2001 |
| A & D Management Investment Ltd | Stratford-Upon-Avon | 2017 |
| A & D Printers Limited | Carlisle | 2006 |
| A & D Safety Ltd | Cottingham | 2025 |
| A & D Thorpe Holdings Limited | Ribchester | 2023 |
| A & D Webb (Stroud) Limited | Cheltenham | 2016 |
| A & D Wilkins Limited | Lincolnshire | 1999 |
| A & DK Legal Ltd | Wellingborough | 2024 |
| A & DP Limited | Colchester | 2005 |
| A & E Domestic Cleaning Services Limited | | 2007 |
| A & E Holdings Limited | Halifax | 2000 |
| A & E Law Limited | London | 2012 |
| A & E Management Limited | Cheltenham | 2018 |
| A & E Marketing (Electronics) Limited | Strathaven | 1988 |
| A & E Peters Ltd | London | 2025 |
| A & E Safety Services Ltd | Grangemouth | 2024 |
| A & E Solutions SW Limited | Teignmouth | 2023 |