| Ascendia Partners Ltd | Oxford | 2026 |
| Ascendia Training Academy Ltd | Stoke-On-Trent | 2026 |
| Ascending Addiction Ltd | Salford | 2025 |
| Ascending Communication Limited | London | 2024 |
| Ascending Phoenix Limited | Taunton | 2006 |
| Ascendit Training Limited | Derby | 2025 |
| Ascendraa Limited | Reading | 2026 |
| Ascension Academy Ltd | Grimsby | 2018 |
| Ascension Alternative Provision Limited | London | 2025 |
| Ascension Catholic Academy Trust | Twickenham | 2022 |
| Ascension Coaching Ltd | Cannock | 2024 |
| Ascension Powerlifting Ltd. | Liverpool | 2024 |
| Ascension Youth Mentoring & Support Services CIC | Sawbridgeworth | 2024 |
| Ascensus Academy Ltd | Mildenhall | 2025 |
| Ascensus SOL Ltd | Stalybridge | 2023 |
| Ascent Academy Ltd | Stanley | 2026 |
| Ascent Aviators Ltd | Choppington | 2019 |
| Ascent Extra Limited | Sunderland | 2014 |
| Ascent Fitness Limited | Aboyne | 2020 |
| Ascent Future Education Ltd | London | 2024 |
| Ascent Leadsership Ltd | Swindon | 2021 |
| Ascent Multi Academy Trust | Kingswinford | 2025 |
| Ascent Training Limited | Feltham | 2012 |
| Ascent Wellness Ltd | London | 2024 |
| Ascentis | Lancaster | 2009 |
| Ascentium Associates Limited | Bedford | 2012 |
| Ascentmed Ltd | Tonbridge | 2025 |
| Ascl Professional Development Limited | Leicester | 1990 |
| Asclepion Limited | Birmingham | 2016 |
| Ascolta Limited | Leeds | 2016 |
| Ascot Aviation Ltd | Llanelli | 2020 |
| Ascot College Limited | Bolton | 2013 |
| Ascot College of Electrical Studies Limited | Maidenhead | 2010 |
| Ascot Education Consultants Limited | Harrow | 2015 |
| Ascot Education Solutions Ltd | Yelverton | 2017 |
| ASD Learning (Midlands) Ltd | Gravesend | 2012 |
| ASD Learning Limited | Gravesend | 2006 |
| Asdan | St George | 1997 |
| Asdirections Ltd | Barnet | 2024 |
| Asdora Ltd | London | 2023 |
| Ase-Schooling Ltd | Edinburgh | 2022 |
| Asec Consultancy Limited | | 2002 |
| Asecondchance Ltd | Basildon | 2009 |
| Aseltraining Limited | Wigan | 2024 |
| Asem Childcare Ltd | Essex | 2016 |
| Asenby Holdings Ltd | York | 2020 |
| Asend Limited | London | 2011 |
| Asended Ltd | Coventry | 2026 |
| Asepsis Innovations Ltd | Godalming | 2026 |
| Aset (1982) Limited | Sheffield | 1982 |
| ASF Global Ltd | London | 2023 |
| ASF Motorsport Limited | London | 2024 |
| Asfm Consultancy Limited | Cardiff | 2019 |
| Asfordby Hill Primary School | Melton Mowbray | 2013 |
| ASG Psychology Ltd | London | 2026 |
| ASG Sports Ltd | Horley | 2006 |
| Asgari Trading Ltd | London | 2025 |
| Asgbi Charity | London | 1997 |
| Asguard Awareness Limited | Gillingham | 2025 |
| ASH & Co Workshops Ltd | Fleet | 2020 |
| ASH & Thorn Outdoor Learning Ltd | Cranleigh | 2025 |
| ASH D Consultancy Ltd | London | 2023 |
| ASH Education Express Ltd | Halifax | 2021 |
| ASH Elements Limited | Huntingdon | 2020 |
| ASH House Consultancy Ltd | Chorley | 2017 |
| ASH House Nursery Limited | Wirral | 2002 |
| ASH Mason Golf Performance Ltd | Leicester | 2024 |
| ASH Perspective Ltd | Hitchin | 2024 |
| ASH School of Motoring Limited | Leicester | 2021 |
| ASH Teaching Limited | Manchester | 2021 |
| ASH Training Limited | Ludlow | 2022 |
| ASH Tree Education Consultants Limited | Halifax | 2018 |
| ASH Watts Careers, Education & Training Ltd | Nottingham | 2024 |
| ASH White Holdings Limited | Gloucester | 2022 |
| Ash's Driving School Ltd | Wolverhampton | 2020 |
| Ash's Place Ltd | Bradford | 2019 |
| ASH133COACHING Limited | Burntwood | 2025 |
| Asha Enterprises Limited | London | 2008 |
| Ashafi Ltd | London | 2026 |
| Ashanti Driving School Limited | Mitcham | 2012 |
| Ashb Ltd | Bury St. Edmunds | 2022 |
| Ashberry Services Limited | Luton | 2022 |
| Ashbourne College Limited | London | 1986 |
| Ashbourne Day Nurseries Limited | Milton Keynes | 2008 |
| Ashbridge School Limited | Preston | 1999 |
| Ashbrooke House Nursing Home Limited | Sheffield | 1999 |
| Ashburton Chefs Academy Limited | Newton Abbot | 2016 |
| Ashburton Consultancy & Learning Limited | Old Street | 2011 |
| Ashburton Cookery School Limited | Newton Abbot | 2006 |
| Ashby Ivanhoe Football Club CIC | Ashby-De-La-Zouch | 2019 |
| Ashby Knight Limited | Ilkley | 2019 |
| Ashchris Learning Limited | London | 2025 |
| Ashchurch Playgroup Tewkesbury Limited | Tewkesbury | 2015 |
| Ashcroft & Ramridge Tenants and Residents Limited | Luton | 2003 |
| Ashcroft Coaching Limited | Sawbridgeworth | 2022 |
| Ashcroft Education Ltd | London | 2024 |
| Ashdon Childrens Nursery Ltd | Cambridge | 2013 |
| Ashdon Windmill Trust Limited | Saffron Walden | 1999 |
| Ashdown Academy Ltd | Forest Row | 2012 |
| Ashdown Driving Academy Ltd | Stourport-On-Severn | 2022 |