| Avondale Foods (Craigavon) Limited | Craigavon | 1981 |
| Avondale Halfpenny Limited | Craigavon | 2026 |
| Avondale Surgical UK Ltd | London | 2022 |
| Avondale Textiles Ltd. | Morecambe | 2011 |
| Avonlynn Limited | Leeds | 2018 |
| Avonmed Services Ltd | Bristol | 2024 |
| Avonmouth Engineering Services Ltd | Bristol | 2020 |
| Avonmouth Marine Limited | London | 2021 |
| Avonmouth Signs Limited | Chittening | 1999 |
| Avonmouth Truck & Trailer Ltd | Bristol | 2019 |
| Avonside Whisky Limited | Elgin | 1964 |
| Avonstar Trading Company Limited | Birmingham | 1983 |
| Avonwood Developments Limited | Wimborne | 1990 |
| Avor Pleaters Limited | Edgware | 1965 |
| Avora Beds Ltd | London | 2026 |
| Avoude Ltd | New Malden | 2025 |
| AVP Trader Ltd | Hemel Hempstead | 2021 |
| AVR Electrical Ltd | Melksham | 2025 |
| AVR Europe Ltd | Stourport On Severn | 2020 |
| AVR Joinery Ltd | Edgware | 2024 |
| Avra Healthcare Limited | Bolton | 2020 |
| Avray Limited | | 1998 |
| Avrilea Ltd | Liverpool | 2024 |
| Avro Designs Ltd | Steyning | 2020 |
| Avro Mechanical Services Limited | Milton Keynes | 2026 |
| Avron London Ltd | Eastbourne | 2021 |
| Avrs Systems Limited | Seascale | 1990 |
| Avrupa Digital Media Limited | Hull | 2014 |
| Avrupa Media Group Limited | London | 2021 |
| Avry Group Limited | London | 2026 |
| AVS Pipe Welding Fabrications Ltd | Bristol | 2013 |
| AVT Natural Europe Limited | London | 2012 |
| Avtar Air Conditioner & Refrigeration Ltd | Smethwick | 2026 |
| Avtar and Son's Limited | Dagenham | 2025 |
| Avtec Fasteners Limited | Basingstoke | 2011 |
| Avtek Ltd | Bournemouth | 2024 |
| Avtex (N.I.) Limited | Belfast | 2020 |
| Avtico Limited | Maidenhead | 2013 |
| Avtpump Limited | Rotherham | 1997 |
| Avtron Loadbank Worldwide Co., Ltd | London | 2010 |
| Avura Skincare Ltd | Leicester | 2026 |
| Avuro Ltd | Enfield | 2018 |
| AVV Plastic Ltd | Epsom | 2018 |
| Avva Group Ltd | Hertfordshire, Watford | 2020 |
| Avvage Ltd | London | 2025 |
| Avvron Ltd | Oxfordshire | 2018 |
| AVW Autocentre Ltd | Edinburgh | 2009 |
| AVW Fabrications Limited | Leicester | 1988 |
| AVY Consultancy Limited | London | 2019 |
| Avyay Aerial Manned Vehicle Development Ltd | Godalming | 2019 |
| Avystone Ltd | London | 2021 |
| AW 133 Ltd | Tetbury | 2025 |
| AW Alterations Limited | Stirling | 2018 |
| AW Aluminium Limited | Rotherham | 2007 |
| AW Anaesthesia Services Ltd | Stoke-On-Trent | 2012 |
| AW Aromatics Limited | Sheffield | 2020 |
| AW Automation Engineers Limited | London | 2023 |
| AW Aviation Ltd | Brough | 2015 |
| AW Beds Ltd | Dewsbury | 2025 |
| AW Burgess Ltd | Meaford Near Stone | 2017 |
| AW Capital (London) Limited | London | 2025 |
| AW CNC Ltd | Dunstable | 2026 |
| AW Coatings Ltd | Mold | 2023 |
| AW Composite Laminating Ltd | Heanor | 2025 |
| AW Confectionery Holdings Ltd | Hove | 2023 |
| AW Confectionery Opco Ltd | Hove | 2024 |
| AW Custom Putters Ltd | Glasgow | 2021 |
| AW Diamond Setting Limited | Brentwood | 2017 |
| AW Elements Ltd | Aberdeen | 2020 |
| AW Fabrication Limited | Darlington | 1992 |
| AW Flight Simulator Services Ltd | Kettering | 2021 |
| AW Furniture Ltd | London | 2024 |
| AW Hair Extensions Ltd | Canterbury | 2012 |
| AW Hospitality Group Ltd | Leigh-On-Sea | 2024 |
| AW Ivybridge Limited | London | 2004 |
| AW Mechanical and Training Limited | Sunderland | 2023 |
| AW Plant & Commercial Ltd | Leeds | 2022 |
| AW Plant Repairs Ltd | Burntwood | 2023 |
| AW Precision Ceramics Ltd | Cranleigh | 2016 |
| AW Precision Group Ltd | Bradford | 2025 |
| AW Services (Kent) Limited | Snodland | 2014 |
| AW Ship Management Limited | London | 2014 |
| AW Spaces Ltd | London | 2012 |
| AW Survey & Installations Limited | Malvern | 2017 |
| AW Technology and Design Ltd | London | 2025 |
| AW Window Installations Limited | Leicester | 2010 |
| Aw&A Ltd | Newcastle | 2025 |
| AWA Logistics Group Ltd | London | 2022 |
| AWA Nature Ltd | Cardiff | 2018 |
| Awab Textiles Limited | Bolton | 2025 |
| Awad T/A Advance Windows and Doors Ltd | Dungannon | 2022 |
| Awafi Foods ( UK ) Limited | London | 2013 |
| Awais Knitwear Limited | Manchester North West | 2007 |
| Awaisgroup Ltd | Walsall | 2025 |
| Awake Organics Ltd | Rushden | 2017 |
| Awaken Saunas Ltd | Dungannon | 2023 |
| Awaken Supplements Ltd | Cambridge | 2023 |
| Awakenjoy Ltd | Cambridgeshire | 2021 |
| Awal PVT Ltd | Rochdale | 2025 |
| Awan Leather Limited | Glasgow | 2025 |