| Avonmouth Project Co Limited | London | 2024 |
| Avonmouth Shipping and Salvage Properties Limited | Bristol | 1989 |
| Avonports Laundry Services Ltd | Dursley | 2014 |
| Avonside Energy Limited | London | 2009 |
| Avonside Pools Limited | Gosport | 2023 |
| Avonsoft Limited | Salford | 2015 |
| Avonvale Model Engineering Limited | Webheath | 2019 |
| Avonward Flat Management Company Limited | Church Road, Stanmore | 1978 |
| Avora Capital Ltd | Northampton | 2020 |
| Avora Housing Ltd | Manchester | 2023 |
| Avore Beauty Ltd | Smalley | 2025 |
| Avoria Health Ltd | Romsey | 2026 |
| Avortis Limited | Leeds | 2026 |
| Avows Ltd | London | 2022 |
| Avoxx Energy Limited | London | 2017 |
| Avprotech Limited | Basildon | 2022 |
| AVR Carbon Limited | London | 2007 |
| Avra Foundation | London | 2018 |
| Avreichim Gateshead | Gateshead | 2017 |
| Avrenim Facilities Management Limited | Bootle | 2018 |
| Avrepaircentre Ltd | Loughbourough | 2014 |
| Avril's Fortunes Limited | Manchester | 2011 |
| AVRIL8 Ltd | Bristol | 2025 |
| Avro Associates Ltd | Dorchester | 2012 |
| AVS International Limited | London | 2025 |
| AVS IT Solutions Ltd | Ilford | 2018 |
| AVS Modular & Portable Ltd | Hull | 2009 |
| AVS Network Limited | St. Helens | 2025 |
| AVS News Ltd | Liverpool | 2014 |
| AVS Retail Ltd | Blackburn | 2014 |
| AVS Safety Limited | Bathgate | 2025 |
| AVS15 Limited | Derby | 2026 |
| Avsar&Son Ltd | London | 2020 |
| Avtar Pardesi Ltd | Amersham | 2014 |
| Avteamuk Ltd | Surbiton | 2016 |
| Avtel (UK) Limited | Milton Keynes | 2008 |
| Avtrac (UK) Limited | Orpington | 1992 |
| Avtrix Ltd | London | 2026 |
| Avus FIX Ltd | Beckenham | 2015 |
| Avy's Hair & Beauty Ltd | Bushey | 2023 |
| Avya Ltd | Widnes | 2018 |
| Avyelle International Media Ltd | Manchester | 2022 |
| Avénu Hair Ltd | Huddersfield | 2019 |
| AW Aesthetics Ilkley Limited | Ilkley | 2026 |
| AW Barber Ltd | Lochgilphead | 2026 |
| AW Bicester Limited | Hitchin | 2021 |
| AW Broadcast Ltd | Abbots Langley | 2009 |
| AW Chairs Ltd | Rct | 2026 |
| AW Clothing Ltd | London | 2026 |
| AW Energy Limited | Leighton Buzzard | 2020 |
| AW Funeral Services Ltd | Andover | 2022 |
| AW Geothermal Limited | Leighton Buzzard | 2021 |
| AW Hairdressing Ltd | London | 2026 |
| AW House of Aesthetics Ltd | Littlehampton | 2025 |
| AW Luck Funerals Ltd | Preston | 2014 |
| AW Partnership Ltd | Christchurch | 2016 |
| AW Pets and Tackle Limited | Ilford | 2025 |
| AW Rail Construction Services Ltd | London | 2019 |
| AW Studio Ltd | Broxburn | 2022 |
| AW1 Storage Limited | Catterick Garrison | 2022 |
| AWA Building Services Consultants Limited | Colchester | 1997 |
| AWA Pharma Ltd | Blackburn | 2011 |
| AWA Studio Ltd | New Malden | 2026 |
| AWA Tattoo Studio Ltd | Leeds | 2020 |
| Awah Services Limited | Reading | 2015 |
| Awais Malik Ltd | London | 2025 |
| Awakala Car Sales Ltd | Birmingham | 2023 |
| Awakala Car Valeting Limited | Tipton | 2018 |
| Awake Alpha Retreats Limited | Liverpool | 2024 |
| Awake Innovations Ltd | London | 2024 |
| Awake: the Conscious Meditation Practice Ltd | Beaconsfield | 2022 |
| Awaken 2 Life Limited | Ipswich | 2024 |
| Awaken Counselling Ltd | Hull | 2025 |
| Awaken Inner Sense Ltd | Ulverston | 2020 |
| Awakened Beauty Limited | Hexham | 2014 |
| Awakened Heart Ltd | Harlow | 2025 |
| Awakened Wave Ltd | Edinburgh | 2024 |
| Awakening City Church Telford Ltd. | Coventry | 2023 |
| Awakening Fertility Ltd | Fareham | 2015 |
| Awakening Inner Consciousness Limited | Bexhill-On-Sea | 2023 |
| Awakening the Wellness Ltd | Glasgow | 2023 |
| Awamu | Sevenoaks | 2011 |
| Awana Scotland | Glasgow | 1999 |
| Awania Naturals Limited | London | 2025 |
| Awara Scot Ltd | Johnstone | 2025 |
| Award Signs and Business Gifts Limited | Cheshire | 2006 |
| Awardtech Consultants Ltd | Selby | 2017 |
| Aware Care Limited | Huddersfield | 2017 |
| Aware Conscious Living Ltd | London | 2020 |
| Aware Environmental Solutions Ltd | Birmingham | 2013 |
| Awash Laundry Ltd | Thatcham | 2010 |
| Awash Limited | Edinburgh | 2012 |
| Awash With Dogs Ltd | Uckfield | 2021 |
| Awastyles Limited | London | 2022 |
| Away With the Furries Ltd | Coventry | 2020 |
| Away With Words Limited | Shipley | 2014 |
| AWB Advisory Ltd | London | 2024 |
| AWB Carlisle Ltd | Carlisle | 2023 |
| AWB Expert Services Ltd | Bury St. Edmunds | 2022 |
| AWB Solutions Limited | Sidcup | 2026 |