| Avonmouth Football Club CIC | Bristol | 2018 |
| Avonmouth Projects Group CIC | Avonmouth, | 2016 |
| Avonstar Services Limited | 23 Dorset Street | 1988 |
| Avoya Fitness Ltd | Bromley | 2020 |
| AVR Dance & Theatre School Limited | East Drayton | 2017 |
| AVR London Ltd | London | 2008 |
| Avramsportsmanagement Ltd | Hemel Hempstead | 2024 |
| Avril Poole Ltd | Crawley | 2016 |
| Avro Community Football Club Limited | Oldham | 2023 |
| Avro FC First Team Limited | Oldham | 2023 |
| Avro Yachting Limited | Dorchester | 2014 |
| Avry Ltd | Altrincham | 2022 |
| AVS Media Limited | St James'S | 2015 |
| Avstratford Ltd | London | 2019 |
| AVT MMA Ltd | Leeds | 2020 |
| Avtr Management & Publishing Ltd | Stratford-Upon-Avon | 2012 |
| AVW Global Ltd | Belfast | 2012 |
| AW Bets Ltd | London | 2025 |
| AW Bouncy Castle Hire Ltd | Wigan | 2014 |
| AW Creative Holdings Ltd | Bolton | 2025 |
| AW Cricket Coaching Ltd | Caerphilly | 2022 |
| AW Digital Designs Limited | Tintagel | 2024 |
| AW Innovations Ltd | Portsmouth | 2024 |
| AW Modern Art Limited | Hartlepool | 2024 |
| AW Music Associates Limited | Pinner | 2015 |
| AW Racing Limited | Folkestone | 2021 |
| AW Sports Promotions Ltd | Cobham | 2024 |
| AW Swimming Limited | Buxton | 2021 |
| AW Touring Limited | St Austell | 2010 |
| AW Wellness Studios Ltd | Billingham | 2020 |
| AW World Ltd | Bristol | 2024 |
| AW6 Promotions Limited | Pontypool | 2019 |
| AWA Game Design Ltd | Faversham | 2025 |
| AWA Herts Ltd | Stansted | 2019 |
| AWA Music Limited | London | 2017 |
| AWA Sports Ltd | Milton Keynes | 2023 |
| Awake (MCR) Ltd | Manchester | 2019 |
| Awake to Know Africa Community Interest Company | Milton Keynes | 2009 |
| Awake Workshops CIC | Norwich | 2023 |
| Awakeconbal Limited | London | 2014 |
| Awaken (Aughton) Limited | Ormskirk | 2025 |
| Awakened State Limited | London | 2025 |
| Awakening Arts Awakening Hearts CIC | Todmorden | 2018 |
| Awakening Strength Ltd | London | 2025 |
| Awakenings Theatre Company Ltd | London | 2019 |
| Awakent Arts Ltd | Coventry | 2016 |
| Award Camps Ltd | Templecombe | 2024 |
| Award Creative Solutions Ltd | Barking | 2025 |
| Awards for Young Musicians | Bristol | 1998 |
| Awards Production Ltd | Goole | 2016 |
| Awayathome Ltd | Gravesend | 2026 |
| Awaytocreate Limited | London | 2025 |
| Awayvale Limited | London | 1978 |
| Awaz Rang Entertainment Ltd | Birmingham | 2025 |
| AWB Entertainment Limited | Coventry | 2023 |
| AWB Sports Ltd | Cobham | 2018 |
| Awe.Curation Ltd | London | 2020 |
| Awel Cymru Gogledd CIC | Wrexham | 2024 |
| Awenek Studio C.I.C. | Torpoint | 2017 |
| Awenydd CYF | Caernarfon | 2003 |
| Awesome & Kosmic Limited | London | 2015 |
| Awesome Events Limited | Edgware | 1996 |
| Awesome Golf Range Limited | London | 2024 |
| Awesome News Limited | Manchester | 2025 |
| Awesome Since 84 Ltd | Durham | 2017 |
| Awesome Studios (Activities) Limited | Teddington | 2015 |
| Awesome Walls Climbing Centres Limited | Frodsham | 2005 |
| Awespower Ltd | East Grinstead | 2024 |
| Aweswim Limited | St. Albans | 2012 |
| Awfully Nice Video Company Limited | London | 1988 |
| Awhbxing Gym Ltd | Auchterarder | 2025 |
| Awihabl Limited | London | 2021 |
| Awip Collective Ltd | Abingdon | 2025 |
| Awip Creative Ltd | Abingdon | 2022 |
| Awizkoa Ltd | London | 2025 |
| Awkward Bunny Ltd | Rainhill | 2021 |
| Awkward Films Ltd | Wantage | 2009 |
| Awkward Prods Limited | Borehamwood | 2025 |
| AWL Images Limited | Shropshire | 2009 |
| AWM General Aviation Limited | Dunmow | 2015 |
| AWS Global Ltd | Houghton Le Spring | 2022 |
| Awta Lottoracing Community Interest Company | Gerrards Cross | 2015 |
| Awua Promotions Ltd | London | 2025 |
| Awvoices Limited | Amersham | 2013 |
| AXB Limited | Doncaster | 2000 |
| Axcadia Limited | Camborne | 2024 |
| Axceler - 8 Hovercraft Experience Limited | Lutterworth | 2006 |
| AXE Academy Limited | Hemel Hempstead | 2025 |
| AXE BEY UK Ltd | Bradford | 2024 |
| AXE Cliff Golf Club Ltd | Seaton | 2023 |
| AXE Junkies Ltd | Worcester | 2020 |
| AXE Lyrical Ltd | Ashington | 2023 |
| AXE Nomads Ltd | Cheltenham | 2021 |
| AXE Racing Ltd | Harrogate | 2019 |
| AXE Vale Netball Community CIC | Honiton | 2024 |
| AXE Valley Swimming Association | Axminster | 2006 |
| Axe-Aholics AXE Throwing Ltd | Newton Aycliffe | 2026 |
| Axed & Enraged Limited | Dundee | 2023 |
| Axed Limited | Nottingham | 2019 |
| Axel Throws Ltd | Twickenham | 2023 |