| Avanti Arts Management Ltd | Marston Moretaine | 2020 |
| Avanti Cycling Trust CIC | Reading | 2018 |
| Avanti Display Ltd | Manchester | 2001 |
| Avanti Sports Ltd | Weymouth | 2019 |
| Avantie London Ltd | London | 2025 |
| Avatar Entertainment, Ltd. | London | 2004 |
| Avatar Fitness Ltd | Chester | 2019 |
| Avatar Graphic Design and Signmaking Limited | Marlborough | 1990 |
| Avatar Media Limited | Bristol | 2006 |
| Avatar Night Club Limited | Liverpool | 2025 |
| Avatar State Arts Ltd | London | 2021 |
| Avatar Touring Limited | Holborn | 2020 |
| Avatarah Ltd | Crockham Hill | 2005 |
| Avaxx Ltd | Glasgow | 2015 |
| AVB Creative Limited | Margate | 2024 |
| AVBCTRADING2017 Ltd | Dunfermline | 2017 |
| AVC Rigging Limited | Harrow, | 2014 |
| AVC Sports 2024 Ltd | Stevenage | 2024 |
| Avco Productions Limited | London | 1997 |
| AVD Sports Academy Limited | Shipley | 2013 |
| Aveacting Limited | London | 2017 |
| Aveley Football Club Limited | Grays | 2014 |
| Aveley Leisure Ltd | London | 2011 |
| Aveline Ltd | London | 2025 |
| Avella Private Wellness Ltd | London | 2025 |
| Avellana Ltd | Salisbury | 2022 |
| Avenew Competitions Limited | Ripon | 2025 |
| Avenge Crossfit CIC | Mallusk | 2020 |
| Avenge Lazor Ltd | Wembley | 2018 |
| Avengers (Film & T.V.) Enterprises Limited(The) | London | 1973 |
| Avengers Cricket Club Limited | London | 2020 |
| Avengers Sports Club Ltd | London | 2025 |
| Avents Events Limited | Belper | 2024 |
| Aventustattoo Ltd | Lincoln | 2022 |
| Avenue Art Advisory Ltd | London | 2025 |
| Avenue Artistes Limited | Southampton | 1964 |
| Avenue Audio Limited | Southampton | 2012 |
| Avenue Billiard Club Limited | Letchworth Garden City | 2008 |
| Avenue Bowling Club (Coventry) Limited | | 1957 |
| Avenue Bowling Club,Limited(The) | Solihull,West Midlands | 1910 |
| Avenue Dance Company Limited | Lancaster | 2023 |
| Avenue Entertainment Limited | Maidstone | 2016 |
| Avenue Lawn Tennis Club(Burnham on Sea)Limited(The) | Somerset | 1923 |
| Avenue Road Bowls Club Limited | Erith | 2005 |
| Avenue Tennis Limited | Hatfield | 2015 |
| Average Arnie's Ltd | Stewarton | 2023 |
| Average Friends Ltd | London | 2025 |
| Average GUY Endurance Ltd | Muir Of Ord | 2025 |
| Average Joes Plymouth Limited | Plymouth | 2019 |
| Averil Sinnott Ltd | Bishop'S Stortford | 2012 |
| Avero Lifestyle Limited | Glasgow | 2026 |
| Avertical World Limited | Dundee | 2024 |
| Avery Fields Community Foundation | Birmingham | 2016 |
| Avery Fields Sports & Events Limited | Birmingham | 2018 |
| Averya Limited | London | 2018 |
| Averyrwalsh Ltd | Loughton | 2022 |
| AVI Kraus Music Limited | London | 2018 |
| AVI Wavey Ltd | Gloucester | 2025 |
| Avian Appreciation Limited | London | 2020 |
| Avian Dance School Ltd | Norwich | 2019 |
| Aviana Media Limited | Potters Bar | 2020 |
| Aviation Heritage Foundation Limited | Haverfordwest | 2008 |
| Aviation Heritage U K Ltd | Hendon | 2017 |
| Aviation Images Limited | London | 2002 |
| Avid Climbing Holdings Ltd | Ipswich | 2024 |
| Avid Climbing Limited | Ipswich | 2016 |
| Avid Leisure Ltd | London | 2024 |
| Avid Marinas Limited | Woking | 2025 |
| Avida Studios Limited | Langley | 2016 |
| Avidavit Production Limited | Manchester | 2018 |
| Avidity Studios Limited | Wirral | 2023 |
| Avie Luthra Films Limited | Preston | 2000 |
| Aviemore Kart Raceway Limited | Glasgow | 2013 |
| Avigate Ltd | London | 2025 |
| Avin a Larf Limited | London | 2008 |
| Avis Indie Art Limited | Newark | 2011 |
| Avitium Ltd | Preston | 2017 |
| Avkb Limited | Bristol | 2013 |
| Avlx Ltd | Watford | 2021 |
| AVM Create Ltd | Harrogate | 2021 |
| AVO Music Limited | Newbury | 2017 |
| AVO Wellness Ltd | Mildenhall | 2025 |
| Avocado Talent Management Limited | Chipping Norton | 2024 |
| Avocado-Pro Ltd | London | 2026 |
| Avocardo Limited | Coventry | 2018 |
| Avocet Original Ltd | Rye | 2015 |
| Avoch Amenities Association | Fortrose | 2009 |
| Avochie Estate (Sporting) Limited | Huntly | 2010 |
| Avon Concordia CIC | Bristol | 2025 |
| Avon Corinthians Rowing Club CIC | Bristol | 2025 |
| Avon House Pool Hire Limited | Ferndown | 2022 |
| Avon Outdoor Activities Club | Bristol | 2012 |
| Avon Racing Ltd | Nr Bath | 2017 |
| Avon Valley Country Park Ltd | Bristol | 2003 |
| Avon Valley Indoor Bowls Club Limited | Warwick | 2014 |
| Avonbank Fishery CIC | Glasgow | 2019 |
| Avoncroft Museum of Historic Buildings | Worcester | 1964 |
| Avondale Fitness Ltd | Glasgow | 2016 |
| Avondale Leisure Ltd | Glasgow | 2015 |
| Avondale Partners Ltd | East Kilbride | 2011 |