| Avika Krishan Holdings Ltd | Wigston | 2016 |
| Avimo Pension Trustees Limited | Reading | 2011 |
| Avington Capital Partners Limited | Addlestone | 2005 |
| Avington International Limited | Addlestone | 2005 |
| Avington Management Services Limited | Addlestone | 2005 |
| Avington North West Limited | Esher | 2016 |
| Avior Care Ltd | Southampton | 2017 |
| Avioteq Ltd | London | 2013 |
| Avisio Limited | Tamworth | 2018 |
| Avisos Yachting Ltd | Cardiff | 2025 |
| Avisource Limited | London | 2008 |
| Avisso Limited | Corsham | 2015 |
| Avitech Limited | Crewe | 1996 |
| Avity Consulting Ltd | Cardiff | 2019 |
| Aviva Brands Limited | London | 1989 |
| Aviva Client Nominees UK Limited | York | 2003 |
| Aviva Commercial Finance Limited | London | 1990 |
| Aviva Holdings Limited | North Harrow | 2001 |
| Aviva Homes Limited | Southwick | 2009 |
| Aviva International Limited | North Harrow | 2004 |
| Aviva Investors (FP) Limited | | 2008 |
| Aviva Investors 40 Spring Gardens (General Partner) Limited | London | 2016 |
| Aviva Investors Property Fund Management Limited | London | 2002 |
| Aviva Investors Social Housing Limited | London | 2011 |
| Aviva Public Private Finance Limited | London | 1989 |
| Aviva Ukgi Investments Ltd | Norfolk | 1988 |
| Avivet Limited | Whitchurch | 1999 |
| AVK Management Ltd | Wimslow | 2015 |
| AVL Care Ltd | London | 2021 |
| Avlets Holdings Ltd | Hatfield | 2023 |
| AVM Fabrications Limited | Callington | 2009 |
| AVM PR Consultancy Limited | Brierley Hill | 2011 |
| AVM Storage Ltd | Cheltenham | 2010 |
| Avma Services Limited | London | 1989 |
| AVN 4X4 Limited | Shrewsbury | 2019 |
| Avner Sayada Accountants (Edgware) Limited | Manchester | 2017 |
| Avner Sayada Accountants Ltd | Manchester | 2008 |
| Avnet International Holdings UK Limited | Stevenage | 2018 |
| Avninder Kaur Mahal Limited | Smethwick | 2025 |
| Avnte Limited | London | 2024 |
| Avoca House Management Company Limited | Bangor | 1998 |
| Avoca Systems Ltd. | Redditch | 1995 |
| Avocado Group Ltd | London | 2016 |
| Avocet Group Limited | Bristol | 2017 |
| Avochie Granite Co. Limited | Matlock | 1996 |
| Avogadro Limited | Malpas | 2014 |
| Avokado Group Ltd | London | 2025 |
| Avon 1968 Limited | Aylesbury | 2014 |
| Avon Air Services Limited | Melksham | 2001 |
| Avon and Severn Drain Services Ltd | Gloucester | 2011 |
| Avon Automatic Doors Limited | Bristol | 2006 |
| Avon Catering Services Limited | Bristol | 2009 |
| Avon Combined Engineering Services Limited | Bristol | 2000 |
| Avon Financial Advisers Limited | Chorley | 2002 |
| Avon House Limited | Woodford Green | 2018 |
| Avon Limited | Northampton | 2024 |
| Avon Lodge Veterinary Group Limited | Bristol | 2011 |
| Avon Protection Limited | Melksham | 1992 |
| Avon Protection UK Limited | Melksham | 1950 |
| Avon Surgical Limited | Chippenham | 2017 |
| Avonbank Investments Limited | Bristol | 2002 |
| Avonbridge (South) Limited | Wimborne | 2004 |
| Avonbridge Consultancy Services Limited | Kenilworth | 2016 |
| Avondale Locomotives Limited | Tamworth | 2004 |
| Avondale Park Homes Limited | Atherstone | 1957 |
| Avondale Security Services Limited | London | 2012 |
| Avondale UK Event & Conference Limited | Newport | 2014 |
| Avondale Ventures Ltd | York | 2024 |
| Avondale Veterinary Services Limited | Fife | 2012 |
| Avonmouth Motor Services Ltd | Bristol | 2018 |
| Avonride Limited | Burton Upon Trent | 1982 |
| Avonridge Investments Limited | Bristol | 1964 |
| Avontide Limited | Syston | 1993 |
| Avonyes Yachting Ltd | Blackpool | 2024 |
| AVR Lighting Limited | Lutterworth | 2010 |
| Avraplan Limited | London | 1999 |
| Avrill & Company Ltd | London | 2015 |
| Avro Electric Vehicles Ltd | Gloucester | 2022 |
| Avro International Aerospace Limited | Camberley | 1992 |
| Avroisle Limited | | 1985 |
| Avron Ltd | Cheadle | 2005 |
| AVS (London) Limited | Feltham | 2016 |
| AVS VAT Limited | Stevenage | 2006 |
| Avsl (Asia) Ltd | Manchester | 2009 |
| Avsl (HK) Ltd | Manchester | 2009 |
| Avster Limited | Bristol | 2014 |
| Avtai Ltd | Wirral | 2025 |
| Avtrac International Limited | Orpington | 2010 |
| Avtrac Limited | Orpington | 2010 |
| Avvelo Limited | Barnet | 2019 |
| Avvocati Ltd | London | 2012 |
| Avvocato Ltd | London | 2016 |
| AW (Carlisle) Limited | Carlisle | 2011 |
| AW Accountants Limited | Redruth | 2018 |
| AW Building and Developments Limited | Poole | 2018 |
| AW Charging Limited | Leighton Buzzrd | 2020 |
| AW Electricity Limited | Leighton Buzzard | 2020 |
| AW Estates Limited | Edinburgh | 2003 |
| AW Flow Holdings Limited | Fareham | 2010 |
| AW Investment Management Ltd | Edinburgh | 2012 |