| A. M. Nelless Ltd | West Byfleet | 2013 |
| A. M. Tours Limited | Blackburn | 2007 |
| A. Martin Garden Services Ltd | Brighton | 2004 |
| A. Mcadie Services Ltd | Tain | 2022 |
| A. Munro Contracting Ltd | Tain | 2023 |
| A. Nash Limited | Midhurst | 2004 |
| A. P. B. Holdings Limited | Shrewsbury | 1991 |
| A. P. Patterns Limited | Cheshire | 1998 |
| A. Parr Landscaping Services Ltd | Stoke-On-Trent | 2006 |
| A. R. C. Network Limited | Sheffield | 2009 |
| A. R. Machinery Ltd | Halifax | 2003 |
| A. Sahota Investments Ltd | London | 2015 |
| A. Shipton Investments Limited | Hoddesdon | 2001 |
| A. Stacey Limited | West Sussex | 2006 |
| A. Stevens Crowd Science Ltd | Leeds | 2020 |
| A. Swift - Civil Design Limited | Warrington | 2014 |
| A. T. Alarms Ltd. | Nottinghamshire | 1995 |
| A. Thompson Engineering Ltd | Burton-On-Trent | 2005 |
| A. Tucker & SON Ltd | Barnsley | 2005 |
| A. U. Astrological Services Limited | London | 2002 |
| A. W. Cleaning Contractors Limited | Longfield | 2011 |
| A. W. George Limited | Haverfordwest | 2017 |
| A. W. Gloyne Limited | Leigh-On-Sea | 1986 |
| A. W. Jenkinson Business Services Ltd | Penrith | 2021 |
| A. Walker Services Ltd | Motherwell | 2006 |
| A. Wardle Garden & Landscaping Services Limited | Wilmslow | 2000 |
| A. West Ltd | Liverpool | 2019 |
| A. Wilson & Co Services Limited | Rochester | 2011 |
| A. Woods Services Limited | London | 2009 |
| A. Wyllie Services Ltd. | Glasgow | 2002 |
| A. Z. Baidoo & Co. Limited | London | 2014 |
| A. Z. Computer Aided Design Limited | Redditch | 1998 |
| A.A Procurement Solutions Ltd | Dudley | 2024 |
| A.A. Fire & Security Limited | Cannock | 2005 |
| A.A. Fisher (Property Services) Limited | Watford | 2015 |
| A.A. Fisher (Trading) Limited | Watford | 2005 |
| A.A. Gibbons Limited | Kent | 1988 |
| A.A. Landscapes Limited | Banchory | 2016 |
| A.A.& T. Rentals Limited | Manchester | 2000 |
| A.A.T.S. Ltd | Shropshire | 2005 |
| A.A.W. Projects Limited | Sutton | 2017 |
| A.Abraham Tower Crane Hire Ltd | Leighton Buzzard | 2016 |
| A.Aden Limited | Birmingham | 2024 |
| A.B Alliance Limited | London | 2023 |
| A.B. Ahmed Associates Limited | Manchester | 2022 |
| A.B. Consulting (Shrewsbury) Ltd | Shrewsbury | 2005 |
| A.B. Detailing Grays Ltd | Grays | 2026 |
| A.B. Dynamic Support Limited | London | 2014 |
| A.B. Exploration Limited | London | 1950 |
| A.B. Fashions Limited | Berkshire | 1998 |
| A.B. Jetwash Ltd | Gaerwen | 2025 |
| A.B. Kucher Investment Advisors Ltd. | London | 2008 |
| A.B. Proclean Limited | London | 2016 |
| A.B. Safety Solutions (UK) Limited | Grimsby | 2010 |
| A.B. Traincare Engineering Limited | Doncaster | 1996 |
| A.B.A Cranes Limited | Halesowen | 2007 |
| A.B.C. Chefs (UK) Limited | Liverpool | 2016 |
| A.B.C. Landscapes Limited | Hove | 2004 |
| A.B.C. Structures Ltd | Shoreham-By-Sea | 2008 |
| A.B.C.D. Distributors Limited | Shropshire | 1991 |
| A.B.D Care Services Ltd | Colchester | 2026 |
| A.B.E&Emanuel Ltd | Luton | 2022 |
| A.B.E.T. Recruitment Limited | Warrington | 2002 |
| A.B.Heather.Carpentry & Joinery Ltd | Bognor Regis | 2002 |
| A.B.R Stone & Brick Restoration Ltd | Gravesend | 2018 |
| A.B.R. Hire Services Limited | Airdrie | 2002 |
| A.B.S Cleaners Ltd | Leicester | 2025 |
| A.Blease Landscapes Limited | Southport | 2024 |
| A.C Alida Care Limited | London | 2021 |
| A.C Briglin Gardening Services Limited | Wellingborough | 2025 |
| A.C Flats Ltd | Manchester | 2023 |
| A.C Properties Limited | Helston | 2001 |
| A.C Window Cleaners Limited | Ripley | 2019 |
| A.C. Automobile Limited | West Midlands | 2004 |
| A.C. Grounds Maintenance Limited | Leicester | 2011 |
| A.C. Harris Limited | Leigh-On-Sea | 2002 |
| A.C. Lobo Ltd | Huddersfield | 2022 |
| A.C. London Cleaning Ltd | West Drayton | 2025 |
| A.C. Nutland & SON Limited | Witney | 2007 |
| A.C. Plant Sales Limited | Inverness | 2016 |
| A.C. Redman Metal Spinnings Ltd. | Havant | 2004 |
| A.C. Tours Scotland Limited | Glasgow | 2022 |
| A.C.& M. Limited | Oakham | 2005 |
| A.C.A Trans Ltd | Kettering | 2016 |
| A.C.A. Assets Ltd | Inchinnan | 2009 |
| A.C.C. Packaging Ltd. | Glasgow | 2003 |
| A.C.E. Landscapes Limited | Swindon | 2000 |
| A.C.Eng. Projects Limited | Stoke-On-Trent | 2005 |
| A.C.G.S Holdings Limited | Manchester | 2023 |
| A.C.L Holdings Ltd | Poole | 2019 |
| A.C.L. Security Limited | Essex | 2002 |
| A.C.M. Security Services Limited | Cullompton | 1985 |
| A.C.Nicoll Blacksmiths Ltd. | Dundee | 2007 |
| A.C.S. Acquisitions Limited | Barking | 2002 |
| A.C.S. Recruitment Consultants Limited | Liverpool | 1983 |
| A.C.Tours Limited | London | 1999 |
| A.C.Trading (Europe) Ltd | Dagenham | 2016 |
| A.Coupland Sweeper Hire Ltd | Woodhall Spa | 2022 |
| A.D Industrial Services Limited | Doncaster | 2024 |
| A.D Moran Ltd | Warrington | 2025 |