| A Wigglesworth and Company Limited | Doncaster | 2003 |
| A Wild Consulting Limited | Sutton Coldfield | 2025 |
| A Wild Life CIC | Horsham | 2025 |
| A Wiles & Associates Limited | Chorley | 2025 |
| A Williams Ltd | Boldon Colliery | 2015 |
| A Williams Project Management Limited | Cardigan | 2016 |
| A Williams Services Limited | Basildon | 2019 |
| A Williams&Son Ltd | London | 2026 |
| A Willis Accounts Ltd | Milton Keynes | 2018 |
| A Wilmot Limited | Aldbourne | 2023 |
| A Wilson Accountancy Ltd | Glasgow | 2015 |
| A Wilson Accounting Services Limited | Brixham | 2015 |
| A WIN Professional Services Ltd | Coventry | 2022 |
| A Winterbotham Ltd | Dymock | 2015 |
| A Winterton Limited | Braintree | 2013 |
| A Wissen Ltd | London | 2025 |
| A Woman Empowered (AWE) Limited | Stevenage | 2013 |
| A World of Pine Limited | Salisbury | 1996 |
| A World Without Walls Ltd | London | 2026 |
| A Worm Company Ltd | London | 2023 |
| A Wynne Consulting Limited | Bury | 2025 |
| A Y & U Ltd | Ilford | 2016 |
| A Y C (Midlands) Limited | Willenhall | 2018 |
| A Y Eyes Ltd | Lonodn | 2022 |
| A Young Studio Limited | Leeds | 2020 |
| A Yung Limited | Towcester | 2025 |
| A Z Accountancy Services (UK) Limited | London | 2005 |
| A Z Global (UK) Limited | Altrincham | 2014 |
| A Z Management Consultancy & Accountancy Ltd | Ealing | 2023 |
| A Zebari Ltd | London | 2024 |
| A$ Ltd | Slough | 2016 |
| A&A Accountancy Ltd | Oldham | 2026 |
| A&A Accountancy Studio Ltd | London | 2018 |
| A&A Accounting & Audit Services Ltd | High Wycombe | 2024 |
| A&A Advisory Partnership Ltd | Reading | 2020 |
| A&A Associates Limited | Epsom | 2012 |
| A&A Biotech Consultancy Ltd | Darlington | 2025 |
| A&A Biotech Limited | Lancaster | 2021 |
| A&A Collective Ltd. | London | 2014 |
| A&A Connects Ltd | London | 2025 |
| A&A Consultancy Limited | Dunfermline | 2015 |
| A&A Consulting (Essex) Limited | Basildon | 2024 |
| A&A Contract Services Ltd | London | 2021 |
| A&A Cost Associates Limited | Barking | 2026 |
| A&A Design Ltd | Croydon | 2012 |
| A&A Drilling Ltd | Billingham | 2014 |
| A&A Drivers and Consultancy Ltd | Warrington | 2025 |
| A&A Educational Services Ltd | Hendon | 2019 |
| A&A Elite Accountants Ltd | Birmingham | 2025 |
| A&A Finances Ltd | Wirral | 2015 |
| A&A Harrison Limited | Epsom | 2011 |
| A&A Health Associates Limited | Preston | 2015 |
| A&A Healthcare Group Ltd | Borehamwood | 2020 |
| A&A Independent Financial Services Ltd | Surrey, Kingswood | 2021 |
| A&A Infotech Limited | Glouceter | 2017 |
| A&A Interior Designer Limited | Manchester | 2025 |
| A&A International Foundation | London | 2026 |
| A&A Kaushal WP Ltd | Billingham | 2024 |
| A&A Limited | Salford | 2026 |
| A&A Northwest Inc Ltd | Feltham | 2026 |
| A&A Portfolio Limited | Fitzrovia | 2021 |
| A&A Prime Care Limited | Lancaster | 2020 |
| A&A Projects Solutions Ltd | London | 2013 |
| A&A PV Consulting Limited | Wimborne | 2016 |
| A&A Refrigeration Limited | Exeter | 2005 |
| A&A Solicitors Limited | Manchester | 2021 |
| A&A Strategy Ltd | Harrow | 2025 |
| A&A Structural Design Limited | Kingston Upon Thames | 2021 |
| A&A Studios Ltd | Hemel Hempstead | 2026 |
| A&A Training and Consultancy Ltd | Milton Keynes | 2014 |
| A&A2 Engineering Ltd | Bolton | 2025 |
| A&Acorp Limited | Portsmouth | 2025 |
| A&Asolutions Ltd | Banbury | 2024 |
| A&Avra Ltd | London | 2024 |
| A&Aw Communications Ltd | Hove | 2020 |
| A&B Accountancy Limited | Edmonton | 2024 |
| A&B Accountancy Solutions Ltd | Portsmouth | 2018 |
| A&B Accounting Services Ltd | York | 2025 |
| A&B Advertising and Casting Agency Limited | London | 2021 |
| A&B Consult Limited | London | 2009 |
| A&B Consultancy Ltd | Camberley | 2021 |
| A&B Engineering Services Ltd | Wells | 2022 |
| A&B Entertainment Communications Ltd | London | 2021 |
| A&B Gardens Limited | Croydon | 2017 |
| A&B Haig Consultants Ltd | Milton Keynes | 2023 |
| A&B High Holdings Limited | Tavistock | 1973 |
| A&B Inspection Services Limited | Sunderland | 2015 |
| A&B Lawyers & Accountants Ltd | Leeds | 2016 |
| A&B London Accountancy Ltd | Barnet | 2023 |
| A&B Radiography Ltd | Grimsby | 2026 |
| A&B Shearing Legal Consultants Limited | Perth | 2024 |
| A&B Smart Materials Limited | Kidlington | 2022 |
| A&B SQE Limited | Kilmarnock | 2017 |
| A&B Swift Solutions Ltd | London | 2017 |
| A&B Tax Consultants Limited | London | 2016 |
| A&B Visa Consultants Ltd | Motherwell | 2023 |
| A&B Zephyr Ltd. | Cardiff | 2014 |
| A&B&C Ltd | Edinburgh | 2015 |
| A&Bp Limited | Sunderland | 2022 |
| A&Bs Consultancy Ltd | Glasgow | 2025 |