| A.Perton Signs Limited | London | 1939 |
| A.R Connected Ltd | Bournemouth | 2024 |
| A.R Landscaping Ltd | Horndean | 2025 |
| A.R. Grinsted & Company Limited | Eye | 1996 |
| A.R. HR Consultancy Limited | Sale | 2017 |
| A.R. Landscapes Limited | Studham | 2005 |
| A.R. Nuclear Engineering Ltd | Wirral | 2008 |
| A.R. Pest Control Ltd | London | 2025 |
| A.R. Psychotherapy Ltd | Preston | 2024 |
| A.R. Pway Solutions Ltd | Birmingham | 2015 |
| A.R. Signs Limited | Melton Mowbray | 2002 |
| A.R. Valve Resources Limited | Kent | 2003 |
| A.R. Wilson Plant Hire Limited | Downham Market | 1978 |
| A.R. Yorke Limited | Taunton | 2004 |
| A.R.B. Works UK Limited | St. Asaph | 2016 |
| A.R.C. Divers Ltd | Ledbury | 2014 |
| A.R.C. Property Maintenance Limited | Twickenham | 2015 |
| A.R.C. Property Services Limited | Twickenham | 2017 |
| A.R.D Gardens Ltd | Littlehampton | 2023 |
| A.R.G Location Services Limited | Slough | 2023 |
| A.R.H Landscapes Ltd | Swadlincote | 2019 |
| A.R.J Landscape Ltd | Swindon | 2010 |
| A.R.J.R.W Consultancy Limited | Stockport | 2011 |
| A.R.K Scottish Real Estate Limited | Glasgow | 2025 |
| A.R.K Talent Solutions Ltd | Glasgow | 2024 |
| A.R.K.S. Tool Hire Limited | Kingswinford | 1986 |
| A.R.L. Consultants Ltd | London | 2021 |
| A.R.O Care Staffing Limited | Nottingham | 2025 |
| A.R.S.Recruitment Limited | Gainsborough | 2025 |
| A.R.T Property Maintenance Limited | Hornchurch | 2010 |
| A.R.T. Inspection Ltd. | Crieff | 2011 |
| A.R.Webster Ltd | Durham | 2022 |
| A.Rand Plant Hire Ltd | Romney Marsh | 2023 |
| A.S Garden Services Ltd | Bromley | 2023 |
| A.S Landscapes Limited | Ulverston | 2012 |
| A.S. Films Limited | London | 2003 |
| A.S. Flats Limited | Corbridge | 2001 |
| A.S. Practice Management Ltd | Bromley | 2025 |
| A.S.A. Merchandising (N.I.) Ltd | Lisburn | 1999 |
| A.S.A. Recreations Limited | Salisbury | 2009 |
| A.S.A.P Accounting Limited | Nottingham | 2017 |
| A.S.Bines,Limited | London | 1921 |
| A.S.C. Management Europe Limited | Taunton | 2011 |
| A.S.D.R. Limited | Haywards Heath | 2007 |
| A.S.H Elite Equine Ltd | Egham | 2014 |
| A.S.H UK Enterprise Ltd | Loughton | 2026 |
| A.S.H.(Uk) Process Servers Limited | Lichfield | 2008 |
| A.S.H.L.E.Y. Building Maintenance Ltd | Cannock | 2023 |
| A.S.I. (Research) Limited | Hainault | 1981 |
| A.S.I. Arcana Servitium Imperii Ltd | London | 2013 |
| A.S.J. Design Limited | Lancs. | 1996 |
| A.S.K Emea Ltd | Brighton | 2020 |
| A.S.K Landscaping Ltd | Leeds | 2021 |
| A.S.K.Gardenservices Ltd | Catterick Garrison | 2024 |
| A.S.L (GB) Ltd | Portsmouth | 2014 |
| A.S.L Offshore Services (UK) Ltd | Norwich | 2012 |
| A.S.L. Personnel Limited | Shepperton | 1995 |
| A.S.M Locksmiths & Facilities Services Limited | London | 2003 |
| A.S.P. South East Ltd | London | 2025 |
| A.S.Page Management Services Ltd | Whitby | 2008 |
| A.S.Pitan Consultants (UK) Limited | Rugby | 2019 |
| A.S.T. Services Trustees Limited | Welwyn Garden City | 2024 |
| A.S.T.Properties Limited | London | 1964 |
| A.S.W. Ventures Limited | Droitwich | 2021 |
| A.Schofield(Pontefract)Limited | Pontefract | 1936 |
| A.Star Cleaning Ltd | Corby | 2026 |
| A.T Smart Solutions Ltd | Hull | 2021 |
| A.T. & P Rentals Ltd. | Guisborough | 1988 |
| A.T. Care Limited | Altrincham | 2025 |
| A.T. Engineering (Propshafts) Ltd. | Glasgow | 2000 |
| A.T. Poeton & SON Limited | Gloucester | 1953 |
| A.T. REY Solutions Limited | London | 2024 |
| A.T.A Buildsafe Ltd | Warrington | 2025 |
| A.T.E. Management Limited | Basildon | 2018 |
| A.T.Rolland (Fife) Ltd. | Kirkcaldy | 2010 |
| A.V Fire & Security Ltd | Eastleigh | 2025 |
| A.V. Cleaning Services Limited | Warrington | 2007 |
| A.V. Force Ltd | Romford | 2023 |
| A.V.S. Contracting Limited | Laurencekirk | 2005 |
| A.V.S.Cumbria Limited | Workington | 2017 |
| A.W. (Window Cleaning Services) Limited | Bolton | 2000 |
| A.W. Chinn Properties (B'Ham) Limited | Walsall | 1965 |
| A.W. Computer Systems Limited | Bristol | 1997 |
| A.W. Consultancy Limited | Bolton | 2004 |
| A.W. Edwards Joiners Ltd | Dunfermline | 2017 |
| A.W. Land & Tree Care Limited | Chieveley | 2007 |
| A.W. Louis & Company Limited | Waltham Abbey | 2013 |
| A.W. Plant Hire Ltd | Birmingham | 2002 |
| A.W. Pristine Cleaning Ltd | London | 2025 |
| A.W. Richards Consulting Limited | Dunstable | 2012 |
| A.W. Technical Services Limited | Stourport On Severn | 2012 |
| A.W.A.D Security Ltd | London | 2025 |
| A.W.A.R.A. Ltd | Haverfordwest | 2021 |
| A.W.E Security Options Limited | Taunton | 2021 |
| A.W.L. Travel Limited | Kingswood | 1986 |
| A.W.S. Cleaning Services Limited | Gosport | 2001 |
| A.Ward Cleaning Limited | St. Albans | 2026 |
| A.Ward Winning Travel Limited | Mansfield | 2025 |
| A.Wilson Consultants Ltd | London | 2021 |
| A.Wilson Recruitment Ltd | London | 2024 |