| Astg Properties Ltd | Ludlow | 2023 |
| Astin Import & Export Co., Ltd | Cardiff | 2019 |
| Astini Limited | Droitwich | 2012 |
| Astley Business Park Management Company Limited | Manchester | 2009 |
| Astley Freehold Ltd | Gateshead | 2015 |
| Astley Funerals Limited | Sutton Coldfield | 1999 |
| Astley International Limited | Harrogate | 2025 |
| Astley Investments Ltd | Gateshead | 2015 |
| Astley Media Limited | Newton Abbot | 2022 |
| Astley National Limited | Coventry | 1925 |
| Astley Seaton Delaval Ltd | Gateshead | 2015 |
| Astley Whittle Limited | Bournemouth | 1999 |
| Aston and Lichfield Ltd | London | 2025 |
| Aston Brooks Limited | Harrogate | 2025 |
| Aston Corporation Ltd | London | 2015 |
| Aston Fire & Safety Limited | Birmingham | 2016 |
| Aston Fuller Limited | Harrogate | 2021 |
| Aston Gate Management Company Limited | Reading | 2018 |
| Aston Goodwin Limited | Harrogate | 2025 |
| Aston Green Limited | Stoke-On-Trent | 1993 |
| Aston Group N.E Limited | Washington | 2019 |
| Aston House (Chinnor) Management Ltd | Chinnor | 2013 |
| Aston International Limited | London | 2004 |
| Aston Martin Financial Services Limited | Warwick | 2009 |
| Aston Martin Racing Limited | Banbury | 2007 |
| Aston Pharma Limited | Huntingdon | 2014 |
| Aston Pipes Limited | Birmingham | 2016 |
| Aston Place Freehold Ltd | Broadstairs | 2023 |
| Aston Shaw Financial Planning Ltd | Norwich | 2020 |
| Aston Shaw Restructuring Ltd | Norwich | 2015 |
| Aston Solutions Limited | Romford | 2014 |
| Aston Trustees Limited | London | 2007 |
| Aston-Medical Limited | Purley | 2013 |
| Astonish Products Limited | Bradford | 1997 |
| Astonmartinbits.Com Limited | Stonehouse | 2018 |
| Astons Building Services Limited | Loughton | 2013 |
| Astons Plumbing & Heating Limited | Gerrards Cross | 2009 |
| Astor Assets Limited | Southampton | 2013 |
| Astor Media Enterprise Ltd | London | 2018 |
| Astoria Marketing & PR Ltd | Shoreham-By-Sea | 2024 |
| Astoria Trading & Consulting Ltd | Ashford | 2011 |
| Astra Locomotive Restoration Limited | Midhurst | 2010 |
| Astra Support Limited | Nantwich | 2013 |
| Astrak EBT Limited | Manchester | 2024 |
| Astrak Global Limited | Manchester | 2021 |
| Astral Grove Management Ltd | Nottingham | 2011 |
| Astral Nexus Co., Limited | Kington | 2024 |
| Astral Vehicle Damage Assessors Limited | Bicester | 2014 |
| Astralight Limited | Blackpool | 2020 |
| Astram Limited | Nottingham | 2009 |
| Astram Solutions Limited | Nottingham | 2008 |
| Astran Limited | Nottingham | 2009 |
| Astrapet Limited | Crawley | 1992 |
| Astrascape Ltd | Benfleet | 2020 |
| Astraseal Limited | Wellingborough | 2018 |
| Astrid Productions Limited | London | 2011 |
| Astrid-Nathalie Anne Carole Pearce Ltd | Teddington | 2021 |
| Astrium Limited | Preston | 2019 |
| Astrixor for International Trading Limited | Manchester | 2026 |
| Astro Products Ltd | Stafford | 2015 |
| Astro Technology Group Ltd | Chatham | 2015 |
| Astrobolt Limited | Ripley | 2017 |
| Astrology Unlimited Ltd | London | 2021 |
| Astrom Invest Limited | London | 2019 |
| Astromelia Worldwide Ltd | London | 2022 |
| Astronomer Ltd | Swindon | 2025 |
| Astrosat Newco Limited | Dunfermline | 2020 |
| Astroserendipity Ltd | Bristol | 2023 |
| Astrum (UK) Limited | Sheffield | 2010 |
| Astute Consulting Ltd | London | 2012 |
| Astute Investment Planning Limited | Littlehampton | 2009 |
| Astwood Developments Limited | Bromsgrove | 2011 |
| Asure Biochem Co., Ltd | Beckenham | 2020 |
| Asure Technology Ltd | Fleet | 2018 |
| Asus Construction Limited | Crawley | 2021 |
| Asus Developments Limited | Crawley | 2021 |
| ASW Skips Limited | Bridgwater | 2006 |
| Aswarby Old Rectory Limited | Sleaford | 1993 |
| Asya Solutions Ltd | Basingstoke | 2012 |
| Asya Yachting Limited | London | 2025 |
| Asyra Ltd | Cwmbran | 2025 |
| AT Construction (South West) Limited | Launceston | 2015 |
| AT Global Limited | Loughborough | 2012 |
| AT Gold Card Limited | Oxford | 1998 |
| AT Home in the Country Limited | Clayton West, Huddersfield | 2007 |
| AT Home With Woodford Limited | Brierley Hill | 2008 |
| AT Newco 20 Limited | Slough | 2014 |
| AT Offshore Solutions Ltd | Dundee | 2024 |
| AT Online Media Limited | Borehamwood | 2012 |
| AT Poeton Limited | Gloucestershire | 2000 |
| AT Property Ltd | Dungannon | 2012 |
| AT Stepframes Ltd | Andover | 2001 |
| AT the Aces Ltd | Blyth | 2025 |
| AT the Heart of Health Ltd | Bristol | 2015 |
| AT the Lake Limited | Oldham | 2022 |
| AT the Mill Limited | North Yorkshire | 2017 |
| AT Trustee Limited | London | 2025 |
| At&Al Healthcare Limited | Manchester | 2023 |
| At&M Co., Ltd | Beckenham | 2019 |
| ATA Glasgow Ltd | Glasgow | 2026 |