| AA Plastic Solutions Limited | Hamilton | 2008 |
| AA Plates Ltd | Romford | 2024 |
| AA Precision Engineering Ltd | Keighley | 2021 |
| AA Precision Limited | Co Tyrone | 2004 |
| AA Precision Toolmakers Limited | Barnstaple | 2012 |
| AA Press Engineering Ltd | Wallington | 2005 |
| AA Print Ltd | Leicester | 2024 |
| AA Renovation Services Limited | Cambridge | 2022 |
| AA Servicepro UK Ltd | Romford | 2024 |
| AA Sheet Metal Limited | Norwich | 2002 |
| AA Shop Design Ltd | Leicester | 2016 |
| AA Shopfronts Ltd | Bradford | 2018 |
| AA Signs Limited | Didcot | 2024 |
| AA Specialist Joinery Limited | | 2008 |
| AA Stones Limited | Waltham Abbey | 2020 |
| AA Tools Ltd | Sheffield | 2014 |
| AA UK Electricals Ltd | London | 2025 |
| Aa-Crete Ltd | Omagh | 2014 |
| Aa-Jintech (New Products) Limited | West Drayton | 2025 |
| AA. Instructor Faysal Omar Ltd | Hampton | 2026 |
| Aa.Acme Carpet Ltd | London | 2025 |
| Aa.Acme Joinery Ltd | London | 2025 |
| AAA Double Glazing Ltd | Oxford | 2025 |
| AAA Fabrications Limited | Wolverhampton | 2021 |
| AAA Furniture UK Ltd | Dewsbury | 2021 |
| AAA Marine Services Ltd | Christchurch | 2018 |
| AAA Mechanical Repairs Limited | London | 2017 |
| AAA Mobiles & Repairs Ltd | London | 2025 |
| AAA Pharmaceuticals Limited | Birmingham | 2012 |
| AAA Poly UK Limited | Stalybridge | 2014 |
| AAA Precision Limited | Stockton On Tees | 2009 |
| AAA Property Maintenance Limited | Luton | 2014 |
| AAA Security Shutters (NW) Ltd | Rochdale | 2022 |
| AAA Signs Limited | Trading Estate Gateshead | 2001 |
| AAA Tyres Ltd | Cardiff | 2019 |
| AAA Web Limited | Cardiff | 2013 |
| AAA Wholesale & Importers Limited | Dunstable | 2009 |
| Aaa/Unbranded Ltd | London | 2022 |
| Aaa/V Systems Ltd | Grimsby | 2003 |
| Aaaa@Amrita Ltd | London | 2026 |
| Aaaf Ltd. | Hampton | 2021 |
| AAB Auto Engineering Limited | Birmingham | 2022 |
| AAB Aviation Ltd | Daventry | 2020 |
| AAB Conveyors Ltd | Consett | 2014 |
| AAB Group Ltd | Ilford | 2020 |
| AAB Vision Ltd | Leicester | 2018 |
| Aabaca Limited | London | 2014 |
| Aabiya Fashions Ltd | Blackburn | 2019 |
| Aaboux UK Limited | London | 2022 |
| Aabs Herbal Ltd | Birmingham | 2025 |
| AAC - Eurovent Ltd. | Walsall | 1979 |
| AAC Carpentry & Construction Limited | Cardiff | 2022 |
| AAC Cyroma Limited | Birmingham | 2002 |
| AAC Mobile Mechanic Ltd | Middlesbrough | 2025 |
| AAC Service (Sussex) Limited | Tunbridge Wells | 2012 |
| AAC Transport Ltd | Luton | 2026 |
| Aachi Fashion Limited | Leicester | 2019 |
| Aacr (Refrigeration & Air Conditioning) Ltd | Bognor Regis | 2015 |
| Aactron Equipment Co. Limited | Exeter | 2003 |
| AAD Aviation Engineering Limited | Prestwick | 2016 |
| AAD Carpentry Limited | Wantage | 2023 |
| AAD Fabrication Ltd | Inverurie | 2016 |
| AAD GB 2019 Limited | London | 2019 |
| AAD Global Limited | Glasgow | 2016 |
| AAD Market Limited | Hull | 2025 |
| Aada Beauty Ltd | London | 2024 |
| Aadi's Diamond and Fine Jewellery Limited | Harrow | 2025 |
| Aadroit Ltd | Dagenham | 2020 |
| Aads Engineering Ltd | South Croydon | 2025 |
| Aadya Enterprises Ltd | Ramsgate | 2026 |
| AAE Wembley Limited | Wembley | 2025 |
| Aaer Ltd | London | 2026 |
| AAF Components Ltd | Bury | 2010 |
| AAF Limited | Cramlington | 1966 |
| Aafiya Scents Ltd | Nottingham | 2020 |
| AAG DS Limited | Angmering | 2000 |
| Aaghar Food Solutions Ltd | London | 2024 |
| Aagrah Foods Limited | Shipley | 2011 |
| AAH Pharmaceuticals Limited | Warwick | 1912 |
| Aahb Ltd | Blackburn | 2021 |
| Aahibbs Ltd | Wilmslow | 2026 |
| Aaho Limited | Manchester | 2022 |
| AAI Robotics Ltd | Bar Hill | 2021 |
| Aairex Environmental UK Ltd | Omagh | 1994 |
| AAJ Sultan Ltd | Cambridge | 2025 |
| AAK (UK) Limited | North Humberside | 1981 |
| AAK Associates Limited | Essex | 2020 |
| AAK BD Foods Limited | North Humberside | 2001 |
| AAK Composites Ltd | London | 2018 |
| AAK Europe Limited | Worthing | 1990 |
| AAK Natural Emulsifiers Limited | Hull | 2011 |
| AAK Traders and Manufacturers Ltd | Northampton | 2019 |
| AAL Carpentry & Brickwork Limited | Farnham | 2010 |
| AAL Global Limited | Leyburn | 2017 |
| AAL Lift Services Ltd | Coulsdon | 2023 |
| Aalberts HFC Limited | St Helens | 1970 |
| Aalberts Surface Technologies Heat Limited | Letchworth Garden City | 1966 |
| Aalberts Surface Technologies Limited | Nottingham | 1969 |
| Aalberts Surface Technologies OCT Limited | Staffordshire | 1998 |
| Aalipat Holding TBC Limited | London | 2025 |