| Avernaco Holdings Limited | Lingfield | 2018 |
| Avernish Investment Limited | Market Harborough | 2022 |
| Avero Advisory Ltd | London | 2025 |
| Avero Group Ltd | Wolston | 2025 |
| Avero JV Holdings Ltd | Wolston | 2025 |
| Averonix Capital Limited | Slough | 2026 |
| Averra Group Ltd | Huddersfield | 2025 |
| Averre Group Limited | Harrogate | 2009 |
| Averroes Capital Limited | London | 2018 |
| Averroes Ventures Advisory Ltd | Loughton | 2024 |
| Avery Capital Limited | West Wickham | 2025 |
| Avery Dennison Pension Trustee Limited | London | 1997 |
| Avery Financial Services Limited | Kidderminster | 2004 |
| Avery Hill Developments Holdings Limited | London | 1994 |
| Avery Hill Developments Limited | London | 1994 |
| Avery Holdco Ltd | London | 2017 |
| Avery House Limited | Portslade | 2020 |
| Avery Investments Ltd | London | 2014 |
| Avery Jensen Wealth Limited | Leicester | 2023 |
| Avery Knights Financial Solutions Ltd | Wolverhampton | 2015 |
| Avery RE Services Limited | London | 2016 |
| Avery Richmond Ltd | Coalville | 2023 |
| Avery ROW Capital Holdings Limited | Tonbridge | 2023 |
| Avery ROW Holdings Limited | Pinner | 2021 |
| Avery Weigh-Tronix International Limited | Windsor | 1894 |
| Avery Weigh-Tronix Limited | West Midlands | 1957 |
| Avery, Atticus & Quinn Limited | London | 2025 |
| Aves Care Group Ltd | Weston-Super-Mare | 2020 |
| Aves Collection Ltd | London | 2021 |
| Aves Group Holdings Limited | Llandysul | 2025 |
| Avesa Group Limited | Canterbury | 2016 |
| Avesira Holding Limited | London | 2026 |
| Avestor Investment Management Ltd | Blackburn | 2025 |
| Avestta Ltd | Hayes | 2009 |
| Aveton Gifford Associates Limited | Coatbridge | 2004 |
| Avex Inc Ltd | Cardiff | 2024 |
| AVF Global Limited | Telford | 2019 |
| AVG Holdings Ltd | London | 2025 |
| AVG-33 Limited | Sutton Coldfield | 2026 |
| Avgen MGA Ltd | London | 2023 |
| AVH Capital Limited | Addlestone | 2014 |
| AVH Group Holdings Limited | Coventry | 2023 |
| AVH Holdings Limited | Braintree | 2019 |
| AVH Investments Limited | Coventry | 2023 |
| Avhe Holdings Ltd | Birmingham | 2023 |
| Avhh Limited | Northwood | 2021 |
| AVHYD1 Limited | Newcastle-Under-Lyme | 2024 |
| AVI Global Trust PLC | London | 1889 |
| AVI Group Ltd | London | 2020 |
| AVI Japan Opportunity Trust PLC | London | 2018 |
| Aviagen European Holdings Limited | Stratford-Upon-Avon | 2009 |
| Aviagen International Finance Four Limited | Stratford-Upon-Avon | 2003 |
| Aviagen International Finance Limited | Stratford-Upon-Avon | 2003 |
| Aviagen International Finance One Limited | Stratford-Upon-Avon | 2003 |
| Aviagen International Finance Two Limited | Stratford-Upon-Avon | 2003 |
| Aviagen International Holdings Ltd. | Warwickshire | 2006 |
| Aviagen Pension Trustees Limited | Edinburgh | 2003 |
| Aviagen Turkeys Holdings Limited | Stratford Upon Avon | 2010 |
| Avian Assets | Rainhill | 2014 |
| Avianca Group International Limited | Altrincham | 2021 |
| Avianta Holdings Ltd | Leamington Spa | 2018 |
| Avianz Asset Management Limited | Hemel Hempstead | 2018 |
| Aviareps UK Holdings Ltd | London | 2001 |
| Aviary Holdings Ltd | Crewe | 2020 |
| Aviary Homes Ltd | Sidcup | 2020 |
| Aviary Investment Holdings Limited | Epsom | 1973 |
| Aviate TIG Co Ltd | Ellesmere Port | 2023 |
| Aviation and Tech Capital Ltd | London | 2012 |
| Aviation Finance Solutions Limited | Orpington | 2012 |
| Aviation Ground Support Holdings Limited | Saffron Walden | 2020 |
| Aviator Capital Ltd | Birmingham | 2017 |
| Aviator Holdings Ltd | London | 2023 |
| Aviatrex Ltd | London | 2019 |
| Avicenna Health Group Ltd | Derby | 2025 |
| Avicenna Holdco Ltd | South Croydon | 2017 |
| Avicenna Ltd | South Croydon | 2017 |
| Avicenna Midco Ltd | South Croydon | 2017 |
| Avicenna Topco Ltd | South Croydon | 2017 |
| Avicia Limited | Chobham | 2010 |
| Avicom Britania Limited | Maidstone | 2009 |
| Avid Bidco Limited | Leeds | 2019 |
| Avid Corporate Limited | Wakefield | 2012 |
| Avid Finance Ltd | London | 2019 |
| Avid Insurance Services Limited | Leeds | 2003 |
| Avid Midco Limited | Leeds | 2019 |
| Avid Technology Group Limited | Gateshead | 2009 |
| Avid Topco Limited | Leeds | 2019 |
| Avidacare Ltd | Nottingham | 2025 |
| Avidian Limited | London | 2025 |
| Avidity Capital Limited | Bootle | 2020 |
| Avidity IP Holdings Ltd | Wirral | 2006 |
| Avidity Limited | London | 2016 |
| Avidity Media Group Limited | Wirral | 2025 |
| Avidity Ventures Limited | West Kirby | 2025 |
| Avidity Wealth Management Holdings Limited | Bromsgrove | 2010 |
| Avidity Wealth Management Limited | Bromsgrove | 2010 |
| Avido AI Limited | London | 2025 |
| Avieella Ltd | Chippenham | 2024 |
| Aviella Consulting Limited | Farnham | 2024 |
| Aviemore Kart Raceway Holdings Limited | Glasgow | 2021 |