| Aspect Design Ltd | Bristol | 2013 |
| Aspect East Anglia Limited | Norwich | 2017 |
| Aspect Exhibitions Ltd | Northampton | 2020 |
| Aspect Homes Limited | York | 1964 |
| Aspects Homes (Midlands) Limited | Leamington Spa | 2001 |
| Aspects of Expression Ltd | Chorley | 2019 |
| Aspectus PR Limited | Exeter | 2011 |
| Aspen BI Fold Doors Ltd | South Staffordshire | 2016 |
| Aspen Clark Ltd | London | 2019 |
| Aspen Direct Ltd | Stowmarket | 2025 |
| Aspen Extra Care Living Limited | Nottingham | 2009 |
| Aspen Fields (Little Kineton) Management Company Limited | Alcester | 2020 |
| Aspen Forestry Limited | Perth | 2002 |
| Aspen Home Improvements Ltd | Wickford | 2011 |
| Aspen Impact Limited | Glasgow | 2016 |
| Aspen Lake (81) Limited | Stroud | 2007 |
| Aspen Lander Limited | Swindon | 2011 |
| Aspen Medical People Limited | Isleworth | 2004 |
| Aspen Pharma Ltd | London | 2013 |
| Aspen Retirement Living Limited | Nottingham | 2009 |
| Aspen Services London Limited | Dartford | 2014 |
| Aspen Software Limited | London | 2013 |
| Aspen Waite in Wales Limited | Peterston Super Ely | 2010 |
| Aspen Waite Legacy Limited | Bridgwater | 2011 |
| Aspen Wave Investment Partners Ltd | Manchester | 2026 |
| Aspenair Environmental Ltd | Benfleet | 2012 |
| Aspenden Trading Limited | Letchworth Garden City | 1959 |
| Asperal Ltd | London | 2023 |
| Aspermont Capital Limited | Beenham | 2015 |
| Aspexan Limited | Northampton | 2018 |
| Asphalt Plant Sales Limited | Leicester | 2004 |
| Asphaltic Roofing Supplies Limited | Sheffield | 1987 |
| Aspinall Management Services Ltd | Edinburgh | 2012 |
| Aspira Ltd | London | 2012 |
| Aspiracloud Assets Ltd | Coventry | 2015 |
| Aspirating Systems Limited | Swindon | 2013 |
| Aspiration Developments Limited | Diss | 2019 |
| Aspiration Fire Protection Limited | Diss | 2019 |
| Aspiration Services Ltd | Gravesend | 2024 |
| Aspirational Developments Limited | Witney | 2024 |
| Aspirations Consultancy and Enterprises Ltd | Burnley | 2015 |
| Aspire Birmingham Limited | Leeds | 2008 |
| Aspire Build Holdings Ltd | Horwich | 2025 |
| Aspire Contracts Ltd | Castle Douglas | 2015 |
| Aspire Development Group Ltd | Herts, Tring | 2022 |
| Aspire Enterprise Services Limited | Oxford | 2018 |
| Aspire for Excellence Ltd | Stafford | 2017 |
| Aspire Homes (Yorkshire) Limited | Scarborough | 2013 |
| Aspire in Mind Ltd | Rochester | 2017 |
| Aspire Interiors Limited | Coventry | 2006 |
| Aspire Logic Ltd | Stratford-Upon-Avon | 2002 |
| Aspire London Limited | Leeds | 2008 |
| Aspire Manchester Limited | Leeds | 2008 |
| Aspire Media Group Shared Services Limited | Colchester | 2009 |
| Aspire Medical Partnerships Limited | Ascot | 2011 |
| Aspire Mrcog Ltd | Bridgend | 2022 |
| Aspire Networks Limited | Hitchin | 2007 |
| Aspire Nexus Ltd | Leeds | 2024 |
| Aspire North Wales Clinic Limited | St Asaph | 2006 |
| Aspire Office Limited | Sunbury-On-Thames | 2013 |
| Aspire PYA 2 Limited | London | 2014 |
| Aspire Safety Technology Co., Ltd. | Kenilworth | 2017 |
| Aspire Students Limited | Chester | 2018 |
| ASPIRE2FITNESS Ltd | Berkhamsted | 2017 |
| Aspired Training Academy Ltd | Ruislip, | 2021 |
| Aspiring Ltd | London | 2011 |
| Aspiringhit Ltd | London | 2011 |
| Aspirus Limited | Manchester | 2009 |
| Aspley Close (Broom) Management Company Limited | Alcester | 2017 |
| Aspragg Ltd | Clevedon | 2016 |
| Asprey Land Limited | Boxley Maidstone | 2002 |
| Asptech Ltd | Birmingham | 2003 |
| Aspudd Ventilation & Byggservice Limited | London | 2020 |
| Aspyrian Ltd | Stevenage | 2018 |
| Asquith and Company (Refrigeration) Limited | Ware | 2012 |
| Asquith Limited | Harrogate | 2026 |
| ASR Aircraft Structures & Fabrication Services Ltd | Norwich | 2024 |
| ASR Holdings Limited | Atcham | 2017 |
| ASR Tech Ltd | Oxford | 2010 |
| Asre Co., Ltd | Cambridge | 2023 |
| Asrs Preservations Limited | Yeovil | 2008 |
| ASS Holdings Limited | Sidcup | 2008 |
| Assam Railways and Trading Company Limited(The) | North Yorkshire | 1881 |
| Assana Accounting Services Limited | Southsea | 2023 |
| Assemat Ltd | Dover | 2020 |
| Assemble Properties Limited | Purfleet | 2020 |
| Assembly Automation Consulting SA / Ltd | London | 2019 |
| Assenda Limited | Salford | 2015 |
| Assero Auxilium Ltd | Dudley | 2017 |
| Assessment Centre Limited(The) | Addlestone | 1986 |
| Assessments & Reviews Limited | Southend On Sea | 1998 |
| Assessvalue Limited | | 1999 |
| Asset Assist 24 Limited | Burton-On-Trent | 2025 |
| Asset Assist 24/7 Limited | Burton-On-Trent | 2025 |
| Asset Assist 365 Limited | Burton-On-Trent | 2025 |
| Asset Assist 366 Limited | Burton-On-Trent | 2025 |
| Asset Construction UK Limited | Hemel Hempstead | 2015 |
| Asset Controls Limited | Liverpool | 2012 |
| Asset Defence Associates Limited | Chichester | 2011 |
| Asset Direction Limited | Exeter | 2006 |