| A to Z Management Holdings Ltd | Rochester | 2023 |
| A to Z Marine Ltd | Norwich | 2015 |
| A to Z Services Ltd | Doncaster | 1996 |
| A to Z Signalling Ltd | Leicester | 2008 |
| A to Z Signs London Ltd | London | 2024 |
| A to Z Trading Ltd | London | 2018 |
| A to ZEN Accountancy Services Ltd | Cheshire | 2007 |
| A Todd Business Associates Limited | London | 2005 |
| A Tolar Engineering Ltd | Nottinghamshire | 2025 |
| A Topham Independent Consulting Ltd | Long Riston | 2011 |
| A Tory & Co Ltd | London | 2025 |
| A Touch of Comfort Ltd | London | 2020 |
| A Touch of Limited | Waterlooville | 2021 |
| A Touch of RHO Ltd | Bromley | 2021 |
| A Tout Ltd | London | 2025 |
| A Traser Limited | Stockport | 2016 |
| A Tree of Life Sciences Limited | Manchester | 2013 |
| A Tribe Called West Ltd | London | 2022 |
| A Trolley Associates Limited | Axbridge | 2018 |
| A True Product Limited | Cardiff | 2005 |
| A TUB of Monkeys Ltd | London | 2023 |
| A Tubman Ltd | Workington | 2026 |
| A Tunnel Wood Limited | Watford | 2024 |
| A Turpin Limited | Leamington Spa | 2013 |
| A Tweedie Limited | Shrewsbury | 2010 |
| A Twist of Lime Limited | Southampton | 2019 |
| A Tyler Consulting Limited | Borehamwood | 2014 |
| A Tyler Photography Limited | London | 2013 |
| A Typical Day Ltd | Kingston Upon Thames | 2020 |
| A UK Business Systems Ltd | Okehampton | 2014 |
| A UK Trade and Infrastructure Enterprise Limited | Coventry | 2022 |
| A UP Marketing Ltd | Chesterfield | 2010 |
| A V a Accountancy Services Ltd | London | 2016 |
| A V a Ecology Limited | Monmouth | 2013 |
| A V Angelone Ltd | Warrington | 2022 |
| A V Cottle Limited | Winchester | 2023 |
| A V Creative Limited | Plymouth | 2016 |
| A V Onyx Limited | Scarborough | 2018 |
| A V S Engineering & Maintenance Limited | Dartford | 2013 |
| A V Savla Accountants Ltd | London | 2023 |
| A V Town Planning Ltd | Nelson | 2011 |
| A V V Assets Ltd | London | 2015 |
| A V W Electrical Services Limited | High Wycombe | 2012 |
| A Verma Ltd | Luton | 2016 |
| A Vibe Called Tech Ltd | Sheffield | 2020 |
| A Viral Marketing Ltd | Chislehurst | 2026 |
| A Visual Agency Limited | Glasgow | 2015 |
| A VS. B Creative Ltd | Tetbury | 2025 |
| A W Accounting Services Limited | Wakefield | 2024 |
| A W Advisory Ltd | Addlestone | 2026 |
| A W Beckinsale & Co Ltd | | 2002 |
| A W C Refinishing Limited | Devizes Road | 2016 |
| A W Consulting Limited | Woodford Green | 1999 |
| A W Counselling Ltd | Crediton | 2021 |
| A W Custom Design Limited | Derby | 1985 |
| A W Dent Ltd | Knaresborough | 2012 |
| A W Engineering Ltd | Stalybridge | 2022 |
| A W Fire Ltd | Basingstoke | 2021 |
| A W G Business Solutions Limited | Spalding | 2018 |
| A W Global Management Limited | Corsham | 2001 |
| A W Jenkinson Investments | Penrith | 2016 |
| A W M Consulting Solutions Limited | Bromborough | 2025 |
| A W Music Limited | Northampton | 2021 |
| A W Network Limited | Bedford | 2026 |
| A W Plant Limited | Great Yarmouth | 2003 |
| A W Promotions Ltd | Sutton Coldfield | 2020 |
| A W Revitt Ltd. | Holsworthy | 2015 |
| A W S Consulting Engineers Limited | Sheffield | 2003 |
| A W S Properties Limited | South Lanarkshire | 1999 |
| A W Sayers Ltd | Bristol | 2010 |
| A W Scott Accountancy Limited | Sudbury | 2003 |
| A W Site Solutions Limited | Barrow-In-Furness | 2025 |
| A W Solid Designs Limited | Camberley | 2014 |
| A W Solutions (NI) Ltd | Newtownards | 2014 |
| A W Stokes (Holdings) Limited | West Bromwich | 2009 |
| A W Strategic Consulting Ltd | London | 2025 |
| A W Streeter & Co Limited | Nottingham | 2024 |
| A W Structures Limited | Chesterfield | 2019 |
| A W Styling Ltd | London | 2025 |
| A W Surveying Limited | Southampton | 2013 |
| A W Surveyors Ltd | Falmouth | 2018 |
| A Wade Tax Consultancy Limited | Ware | 2025 |
| A Walk With a Thousand Friends Ltd | Paisley | 2024 |
| A Wardhaugh Consulting Ltd | Pontyclun | 2024 |
| A Wardle Ltd | Birmingham | 2016 |
| A Warmer Way Ltd | Saxilby | 2015 |
| A Warren Consulting Limited | Little Eaton | 2018 |
| A Watson Associates Limited | Newcastle Upon Tyne | 2010 |
| A Way Forward Consulting Ltd | London | 2016 |
| A Way to Store Limited | Leamington Spa | 2004 |
| A Way With Tax Limited | London | 2002 |
| A Webb Consulting Ltd | Sherborne | 2024 |
| A Webb WE Weave Limited | Stoke-On-Trent | 2023 |
| A Webster Consulting Ltd | Harpenden | 2022 |
| A Webster Design Limited | Leigh-On-Sea | 2019 |
| A Wesley Ltd | Nottingham | 2011 |
| A Weston Consulting Ltd | Orpington | 2025 |
| A Westwood Consultancy Limited | Addlestone | 2025 |
| A White Ltd | Leeds | 2019 |
| A Whyte Ltd | Glasgow | 2026 |