| Ancient Wisdom Marketing Limited | Sheffield | 2000 |
| Ancientlair Ltd | Southampton | 2018 |
| Ancientsoaps Ltd | Birmingham | 2025 |
| Ancilla Metal Limited | Brentwood | 2024 |
| Anclo Group Ltd | Nottingham | 2021 |
| Ancmanufacturing Ltd | Folkestone | 2020 |
| Anco Engineering Limited | Leeds | 2011 |
| Anco Catalysts Limited | Upton Warren | 1987 |
| Anco Forklift Services Ltd | Hen Bury | 2025 |
| Anco Ltd | Brentford | 2024 |
| Ancol Pet Products Limited | Bloxwich | 1971 |
| Ancon Special Alloy Steels Limited | Dearne Valley | 1978 |
| Ancrum Electronics Limited | Edinburgh | 2000 |
| Ancu Tech Ltd | Greenford | 2026 |
| AND Co. Brands Ltd | Sevenoaks | 2009 |
| AND Distil Limited | Liverpool | 2023 |
| AND Fragrance Ltd | Wareham | 2020 |
| AND Frame Ltd | Wigan | 2024 |
| AND Goods Limited | London | 2016 |
| AND Healthcare Ltd | Bolton | 2023 |
| AND Lottie Limited | London | 2023 |
| AND OUR Seeds Limited | London | 2024 |
| AND Products Limited | Bromsgrove | 2019 |
| AND Publishing (South) Limited | Hampshire | 2005 |
| AND WE Keep Limited | Lisburn | 2021 |
| And-Goat Ltd | Kington | 2024 |
| Anda Hydraulics Co., Ltd | Gillingham | 2023 |
| Anda Products Limited | Crawley | 1920 |
| Andafdar Technology Ltd | London | 2025 |
| Andair Limited | Portsmouth | 1995 |
| Andalus House of Cake Ltd | London | 2025 |
| Andapak Corrugated Sales Limited | Nottingham | 2011 |
| Andapak Supply Co.Limited | Nottingham | 1970 |
| Andaray (Engineering) Limited | Sheffield | 1978 |
| Andark Commercial Diving Limited | Brockenhurst | 2022 |
| Andaura Limited | Stanley | 2008 |
| Andav Engineering Services Ltd | High Wycombe | 2021 |
| Andawest Engineering Limited | Derbyshire | 1981 |
| Andel Limited | Huddersfield | 1992 |
| Andel Plastics Limited | Birmingham | 1975 |
| Andeliver Biotech Limited | Beckenham | 2025 |
| Andell Conveyor Chains Limited | Manchester | 2001 |
| Andenor Limited | Newark | 2011 |
| Ander Technologies (Europe) Limited | Chesterfield | 2016 |
| Anderen Limited | Stoke On Trent | 2002 |
| Andermatt Biocontrol UK Limited | Henfield | 2017 |
| Anders Electronics PLC | London | 1952 |
| Andersen EV PLC | Stewartby | 2021 |
| Andersen Textiles Ltd | Manchester | 2001 |
| Anderside Tools Limited | Glasgow | 1983 |
| Anderson & Sheppard Limited | London | 1980 |
| Anderson Agri-Plant Services Ltd | Brechin | 2015 |
| Anderson Apparel Limited | Machynlleth | 1998 |
| Anderson ATV Limited | Leeds | 2004 |
| Anderson Bespoke Services Ltd | Newbridge | 2025 |
| Anderson Biosafety Ltd | Ipswich | 2022 |
| Anderson Composite Services Ltd | Prestatyn | 2021 |
| Anderson Creations Limited | Glasgow | 2016 |
| Anderson Digital Limited | Glasgow | 2006 |
| Anderson Electrical Ltd | Hereford | 2019 |
| Anderson Engineering and Welding Services Ltd | Stockport | 2022 |
| Anderson Engineering Limited | West Bromwich | 2007 |
| Anderson Equipment Ltd | Grantham | 2025 |
| Anderson Glassfibre Limited | Warwickshire | 2000 |
| Anderson GUM Bins Ltd | Southend-On-Sea | 2008 |
| Anderson Hydraulics (Doncaster) Limited | Thurnscoe Rotherham | 1992 |
| Anderson Interiors Limited | Magherafelt | 2019 |
| Anderson Marine (Scotland) Limited | Peterhead | 2014 |
| Anderson Plastics (NI) Ltd | Co Antrim | 2003 |
| Anderson Products Limited | Northwich | 2020 |
| Anderson Ross Watch Co Ltd | Edinburgh | 2026 |
| Anderson Upholstery Limited | Newton Aycliffe | 2016 |
| Anderson Wind Services Ltd | Southsea | 2025 |
| Andersons Beds Limited | Willenhall | 2017 |
| Andersons Commercials Ltd | Leicester | 2002 |
| Andersons Services and Supplies Limited | Norwich | 2011 |
| Anderston Brewery Ltd | Glasgow | 2025 |
| Anderston Group Ltd | Finnieston, | 2022 |
| Anderton Aero Limited | Telford | 2019 |
| Anderton Board and Packaging Limited | Manchester | 2004 |
| Anderton Circlips Limited | Keighley | 1939 |
| Anderton Concrete Products Limited | Leicestershire | 1985 |
| Anderton Corporation Limited | London | 2007 |
| Andfor Ltd | Poole | 2023 |
| Andhans Ltd | London | 2022 |
| Andian Specialist Fabrications Limited | Stourbridge | 2005 |
| Andicraft Fabrications Limited | Syston | 2003 |
| Andik Sports Ltd | London | 2026 |
| Andina Ingham Ltd | Sevenoaks | 2005 |
| Andino Valley Ltd | London | 2021 |
| Andk Trading Ltd | London | 2021 |
| Andmar Joinery Ltd | London | 2022 |
| Andmar Machinery Services Limited | Nuneaton | 1984 |
| Andmax Limited | Salisbury | 2023 |
| Andmoreagain Limited | Melton Constable | 2016 |
| Ando Recycling Ltd | Nottingham | 2023 |
| Andolite International Limited | Daventry | 2026 |
| Andolite Limited | Croydon | 2001 |
| Andor Technology Limited | Belfast | 1989 |
| Andora Group Ltd | London | 2019 |