| Assets Investments Limited | Morden | 2022 |
| Assets Mall Ltd | Morden | 2020 |
| Assetsgroup Limited | Reading | 2013 |
| Assg Ltd | London | 2018 |
| Assi Cafe Limited | Cardiff | 2019 |
| Assif Bakech Ltd | Manchester | 2026 |
| Assisi Community Care Limited | Barnstaple | 1985 |
| Assist Housing Ltd | Birmingham | 2015 |
| Assist Supporting Accommodation CIC | Sutton Coldfield | 2025 |
| Assisted Accommodation Limited | London | 2009 |
| Assisted Homes CIC | London | 2012 |
| Assisted Hotels Inc Limited | Glasgow | 2025 |
| Assmark Service Ltd | Luton | 2020 |
| Assn UK Ltd | Cardiff | 2025 |
| Associated Beverage Services Limited | Bishops Stortford | 1999 |
| Associated Guest Houses Limited | Middlesbrough | 2006 |
| Associated Hotels Ltd | Walsall | 2018 |
| Associates of Eden Limited | Croydon | 2023 |
| Association of Belarusians in Great Britain Limited | | 1948 |
| Association of Scotland's Self-Caterers Limited | Glasgow | 2016 |
| Assorted Works Limited | Bristol | 2005 |
| Assos Catering Limited | Cardiff | 2019 |
| Assos Food Ltd | Norwich | 2020 |
| Assrm Catering Ltd | Saltdean | 2024 |
| Asss Properties Ltd | Glasgow | 2023 |
| Assumpta Property Investment Limited | Liverpool | 2021 |
| Assura Homes Ltd | Cardiff | 2025 |
| Assura Hospitality Ltd | Glasgow | 2022 |
| Assura Support Ltd | London | 2022 |
| Assure Enterprise Ltd | London | 2013 |
| Assure Group Limited | Kington | 2006 |
| Assured House Ltd | Merseyside, Liverpool | 2022 |
| Assured Food Standards | Faversham | 2003 |
| Assured Hope C.I.C. | Northampton | 2026 |
| Assured IND Enterprise Ltd | Liverpool | 2026 |
| Assured Living Housing Association Limited | Preston | 2008 |
| Assured Premises Limited | London | 2017 |
| Assured Quality Care Ltd | High Wycombe | 2025 |
| Assured Rest Hotels Ltd | Carlisle | 2006 |
| Assured Services Limited | South Croydon | 1994 |
| Assured Stays Management Limited | Bury | 2023 |
| Assured Travel & Events Ltd | London | 2023 |
| Assured Travel Network Limited | Southampton | 2025 |
| Assurestaygroup Ltd | York | 2026 |
| Assvi Catering Ltd | Luton | 2023 |
| Assvi Kitchen and Bar Limited | Luton | 2026 |
| Assynt Community (Trading) Ltd | Lochinver | 2014 |
| AST 123 Limited | Manchester | 2013 |
| AST Cafe Ltd | Aldershot | 2023 |
| AST Catering Ltd | Woking | 2025 |
| AST Foods Limited | Langley | 2025 |
| AST Pubs Limited | Stroud | 2025 |
| AST808 Limited | Chester | 2026 |
| Astalapasta Ltd | Glasgow | 2025 |
| Astalet Catering Ltd | London | 2017 |
| Astaluna Ltd | Truro | 2026 |
| Astana Limited | Cambridge | 2020 |
| Astar Catering Ltd | Ferndown | 2026 |
| Astar Clubs Ltd | Leicester | 2017 |
| Astas Business Limited | Motherwell | 2025 |
| Astaway Holidays Ltd | Morpeth | 2021 |
| Astay Ltd | Bristol | 2018 |
| Astbury Falls Luxury Retreats Ltd | Bridgnorth | 2020 |
| Astbury Hall Lodge Resort Limited | Bridgnorth | 2021 |
| Astendos Limited | Nairn | 2010 |
| Aster Fusion Ltd | Paisley | 2025 |
| Aster Hospitality Ltd | Bakewell | 2025 |
| Aster House Ltd | St. Albans | 2026 |
| Aster Mental Health CIC | Birmingham | 2021 |
| Aster Restaurants Ltd | London | 2023 |
| ASTER360 Ltd | Hounslow | 2021 |
| Asteria MK Limited | Milton Keynes | 2024 |
| Asterion Holdings Ltd | Liverpool | 2024 |
| Asterix London Ltd | London | 2013 |
| Asteron Applied Sciences Ltd | Bognor Regis | 2026 |
| Astex Security Services Ltd | Bournemouth | 2024 |
| Astha's Kitchen Ltd | London | 2024 |
| Asthal Bohar Limited | Barry | 2022 |
| Astill Lodge Food Hub Ltd | Leicester | 2025 |
| Astiludium Limited | Cardiff | 2013 |
| Astir Hub Ltd | Batley | 2023 |
| Astl Property Ltd | Manchester | 2024 |
| Astleelets Ltd | Rhyl | 2024 |
| Astleigh House (Management Company) Limited | Weston-Super-Mare | 1988 |
| Astley Bank Hotel Limited | Darwen | 1997 |
| Astley Bridge Bowling Green Community Interest Company | Lancashire | 1895 |
| Astley Inn Limited | Chorley | 2026 |
| Astley Limited | Bolton | 2023 |
| Astley Pizza Ltd | Newcastle Upon Tyne | 2023 |
| Astley Spice Ltd | Manchester | 2014 |
| Aston Associates Limited | Cheltenham | 1996 |
| Aston Bridges Group Ltd | Basildon | 2024 |
| Aston Caterers Limited | St. Albans | 1977 |
| Aston Catering Limited | Tewkesbury | 2022 |
| Aston Chef Limited | London | 2023 |
| Aston Court Hotel Ltd | Borehamwood | 2023 |
| Aston Court Residents Association Limited | Chiswick | 1978 |
| Aston Cross Hospitality Ltd | Great Yarmouth | 2023 |
| Aston Desserts Ltd | Birmingham | 2026 |
| Aston Events Limited | Ferndown | 2019 |