| Aspire Carpentry Limited | Bourne | 2022 |
| Aspire Ductwork Services Limited | Burgess Hill | 2017 |
| Aspire Engineering Limited | Taunton | 2015 |
| Aspire Engineering Solutions Ltd | Goole | 2016 |
| Aspire Fabrications Ltd | Barnsley | 2018 |
| Aspire Fencing Group Ltd | Wigan | 2024 |
| Aspire FOX Ltd | Edinburgh | 2024 |
| Aspire Gates Limited | Chesterfield | 2003 |
| Aspire Group 360 Ltd | Oldham | 2013 |
| Aspire Group Yorkshire Ltd | Wakefield | 2020 |
| Aspire Horseboxes Limited | Plumpton Green | 2019 |
| Aspire Innovation Development Ltd | Petersfield | 2025 |
| Aspire Kitchen and Bedrooms Ltd | Wigan | 2018 |
| Aspire Manufacturing Limited | Barnsley | 2016 |
| Aspire Marine Ltd | Port Glasgow | 2021 |
| Aspire Mattresses Limited | Leeds | 2018 |
| Aspire Park and Leisure Homes Ltd | Porthmadog | 2014 |
| Aspire Pro Sports Ltd | Wakefield | 2016 |
| Aspire Stairlifts Limited | Topcliffe | 2024 |
| Aspire Steel Structures Ltd | Robertsbridge | 2014 |
| Aspire TEC Limited | Pontyclun | 2025 |
| Aspire Timberframe & Construction Ltd | Llanelli | 2019 |
| Aspire UK Interiors Limited | Nelson | 2018 |
| Aspire Upholstery Ltd | Port Glasgow | 2010 |
| Aspired Builders Ltd | London | 2019 |
| Aspired Marketing Media Ltd | Enfield | 2024 |
| Aspiria Motors Limited | Newcastle Upon Tyne | 2025 |
| Aspiring Ground CIC | Northampton | 2021 |
| Aspland Designs Ltd | Basildon | 2021 |
| Aspland Gauge Company Limited | Manchester | 1978 |
| Aspley Services Limited | Huddersfield | 2011 |
| Asplin Whiteley Ltd | London | 2023 |
| Aspraes Limited | Saffron Walden | 2006 |
| Asprita Limited | London | 2025 |
| Aspull Electrical Services Limited | Wigan | 1968 |
| Aspull Engineering Co. Ltd. | Manchester | 2006 |
| Asquith Butler Limited | Sutton Coldfield | 2003 |
| Asquith Group Limited | Plymouth | 2017 |
| Asquith Interiors Limited | Bishop Auckland | 2015 |
| Asquith Motor Company Limited | London | 2002 |
| ASR and Co Services Ltd | Romford | 2023 |
| ASR Electroplating Ltd | London | 2019 |
| ASR Global Co Limited | Enfield | 2020 |
| ASR Group Europe (Property) Limited | London | 2016 |
| ASR Group Europe Limited | London | 2015 |
| ASR Group Limited | London | 2016 |
| ASR Motor Body Engineering Limited | Wellingborough | 2004 |
| ASR Product Technologies Ltd | Coventry | 2022 |
| Assa Abloy Entrance Systems Ltd | Sheffield | 1967 |
| Assa Abloy Limited | West Midlands | 1987 |
| Assaf Trading Ltd | London | 2024 |
| Assaisonnement Yiaya Ltd | Croydon | 2025 |
| Assal Bakery Ltd | London | 2026 |
| Assal PAT Ltd | London | 2025 |
| Assam Aroma Limited | Burnley | 2019 |
| Assay Atelier Ltd | Telford | 2026 |
| Assembl Limited | Newport | 2024 |
| Assemblage Design Ltd | Norwich | 2021 |
| Assembled Joinery Limited | Chorley | 1994 |
| Assemblelux Limited | Middlesbrough | 2011 |
| Assembly & Packaging Services Ltd | Woodford Green | 1989 |
| Assembly Bikes Limited | London | 2019 |
| Assembly Circuit Technology Limited | St. Austell | 1993 |
| Assembly Coffee Limited | London | 2021 |
| Assembly Contracts Limited | Wythenshawe Manchester | 1990 |
| Assembly Finishing Limited | Leigh-On-Sea | 2011 |
| Assembly Group Limited | Gloucester | 2021 |
| Assembly Guys Ltd | High Wycombe | 2023 |
| Assembly Point Limited | London | 2000 |
| Assembly Solutions Interiors Ltd. | West Lothian | 2003 |
| Assembly Solutions Limited | Bolton | 1995 |
| Assemblyroom Limited | London | 2003 |
| Assemtron Ltd | Walsall | 2020 |
| Assens Technology Co., Ltd | Stafford | 2023 |
| Assentech Rapid Response and Service Ltd | St. Austell | 2015 |
| Asser Electrical Services Limited | Gillingham | 2010 |
| Asser Oakes Engineering Limited | Macclesfield | 2004 |
| Asser Oakes Limited | Crompton Road, Macclesfield | 2004 |
| Assess Limited | Windsor | 2025 |
| Asset Bridge Productions Ltd | London | 2024 |
| Asset Cars Ltd | Abertillery | 2015 |
| Asset Competency Management Ltd | Hexham | 2009 |
| Asset Dynamics Group Limited | Towcester | 2022 |
| Asset Energy Limited | Portsmouth | 2003 |
| Asset Engineering (2007) Limited | Dudley | 2007 |
| Asset Engineering Ltd | Dudley | 2009 |
| Asset Health Products Ltd | Louth | 2022 |
| Asset Integrity NDT Services Ltd | Glasgow | 2026 |
| Asset Integrity Solutions Limited | Ellesmere Port | 2007 |
| Asset Maintenance Solutions Limited | Inverness | 2025 |
| Asset Mechanical Services Limited | Hemel Hempstead | 2013 |
| Asset Protection & Licencing Limited | Tetbury | 2020 |
| Assetcool Limited | Batley | 2020 |
| Assetrove Vending Ltd | Harrow | 2025 |
| Assets of Luxury Ltd | London | 2025 |
| Assi Technical Services Ltd | Birmingham | 2019 |
| Assiam Global Ventures Ltd | London | 2025 |
| Assiduous Electrical Installations Limited | Cardiff | 2018 |
| Assigns Limited | Letchworth | 1999 |
| Assisi Pet Care (Northern Ireland) Limited | Belfast | 2025 |