| Alissa Salls Limited | Sheffield | 2017 |
| Alissar Bayoud Wynn Ltd | London | 2025 |
| Alissium Aerial Arts Limited | Redruth | 2022 |
| Alistage Limited | St John'S Wood | 2013 |
| Alistair & Balland Co. Limited | Edinburgh | 2024 |
| Alistair Brammer Ltd | Wallington | 2025 |
| Alistair Brownlee Ltd | Ipswich | 2009 |
| Alistair Canvin Ltd | Bristol | 2023 |
| Alistair Johnson Limited | Leicester | 2015 |
| Alistair Kitchener Personal Training Ltd | Faringdon | 2008 |
| Alistair Lindsay Entertainment Ltd | Betchworth | 2025 |
| Alistair Mills Fitness Ltd | Manchester | 2016 |
| Alister Thorpe Photography Limited | London | 2013 |
| Alitaloha Pole Studio Ltd | Northwich | 2023 |
| Alive and Aware Management Ltd | Pudsey | 2015 |
| Alive Arts Ltd | Forres | 2012 |
| Alive Fitness and Natural Health Limited | Brighton | 1990 |
| Alive OR Dread Ltd | London | 2024 |
| Alive Productions & Entertainment Limited | Crosby | 2016 |
| Alive Trading Limited | Bristol | 2009 |
| Alive West Norfolk | King'S Lynn | 2019 |
| Alix Slater Consultancy & Training Ltd | Maidenhead | 2010 |
| Alixr Ltd | Bath | 2024 |
| Aliya Roberts Ltd | St Albans | 2022 |
| Alizarin Ltd | Paisley | 2023 |
| ALJ Entertainment Ltd | Leeds | 2023 |
| Aljo Entertainment Ltd | Nottingham | 2025 |
| Aljo Ents Limited | Bognor Regis | 2013 |
| Aljzeera Center Ltd | London | 2026 |
| Alkaid Luette Ltd | London | 2025 |
| Alkaline Music Productions Ltd | Alresford | 2024 |
| Alkaline Studio Services Limited | Uxbridge | 2018 |
| Alkamist Ltd | Acton | 2016 |
| Alkemist Media Limited | Rushden | 2002 |
| Alkent Technical Ltd | Rotherham | 2023 |
| Alkhayal Limited | London | 2022 |
| Alkincoats Ltd | Clitheroe | 2010 |
| ALL & Sundry Productions | Bromsgrove | 2014 |
| ALL 1 Tribe Limited | Market Harborough | 2016 |
| ALL 4 FUN Limited | Nottingham | 2009 |
| ALL 4 One Consultants Limited | Oldham | 2012 |
| ALL 4 Pets Limited | Leigh | 2003 |
| ALL Aboard Opera! Ltd | Abingdon | 2021 |
| ALL About ALF & ADA Ltd | Spalding | 2023 |
| ALL About Ashley Limited | Spalding | 2018 |
| ALL About Content Limited | Nuneaton | 2018 |
| ALL About Football Ltd | Birkenhead | 2024 |
| ALL About Fun.Com Limited | Cheltenham | 2005 |
| ALL About ME Fitness Ltd | Leighton Buzzard | 2015 |
| ALL About Swimming Ltd | Bexley | 2024 |
| ALL About the Benjamins Ltd | Northampton | 2020 |
| ALL About the Core Limited | Southwark | 2015 |
| ALL About the Music Hub CIC | Birmingham | 2025 |
| ALL About YOU North East Community Interest Company | Sunderland | 2016 |
| ALL Abstract Art Ltd | Ashford | 2023 |
| ALL Access Staging & Productions Limited | Bisley | 2009 |
| ALL Active (N.I.) Ltd | Lisburn | 2021 |
| ALL Apologies Limited | London | 2014 |
| ALL Around the World Music Limited | Salford | 1991 |
| ALL Around the World Reproductions Limited | London | 1991 |
| ALL Audio Music Rentals Ltd | Glasgow | 2025 |
| ALL Ball Ltd | Scarborough | 2024 |
| ALL Banged UP Limited | London | 2003 |
| ALL Bounce Surrey Limited | Surbiton | 2018 |
| ALL by Fluke Limited | Harrow | 2024 |
| ALL Champs Lancaster Ltd | Morecambe | 2024 |
| ALL Change Arts Limited | London | 1985 |
| ALL Change Productions Ltd | Hay-On-Wye | 2010 |
| ALL City Community CIC | London | 2021 |
| ALL City Sport CIC | London | 2025 |
| ALL Coin Ltd | Chichester | 2005 |
| ALL Connected Limited | London | 2004 |
| ALL Court Tennis Limited | Stafford | 2018 |
| ALL Dance Abilities Ltd | Reigate | 2022 |
| ALL Day Fitness Limited | Edinburgh | 2025 |
| ALL Day Long (Golf) Ltd | Edinburgh | 2025 |
| ALL Day MMA Gym Ltd | Kenley | 2024 |
| ALL Day Music Ltd | Congleton | 2026 |
| ALL Day Play Limited | Grantham | 2021 |
| ALL Day Records Ltd | Liverpool | 2025 |
| ALL Dolled UP Essex Ltd. | Chelmsford | 2017 |
| ALL Dressed UP Limited | Bromsgrove | 2024 |
| ALL Ears Electronic Ltd | London | 2023 |
| ALL Ears Management Ltd | London | 2023 |
| ALL Ears Poetry Ltd | Liverpool | 2024 |
| ALL Ears Promotions Limited | London | 2017 |
| ALL England Netball Association Limited | Loughborough | 1983 |
| ALL England Taekwon-Do Association CIC | Eastbourne | 2018 |
| ALL for Kids Ltd | Kingswinford | 2025 |
| ALL for One Choir Limited | Barrow On Humber | 2014 |
| ALL for YOU - Singing Waiters Ltd | Wellingborough | 2024 |
| ALL Gains Collective Ltd | London | 2025 |
| ALL Glamour Ltd | Northwood | 2018 |
| ALL Good Folks Limited | Hove | 2021 |
| ALL Good Thoughts Ltd | Gourock | 2022 |
| ALL Graphics Limited | Newcastle Upon Tyne | 2017 |
| ALL Ice Productions Ltd | Manchester | 2022 |
| ALL Ignite Theatre Limited | London | 2018 |
| ALL in Fitness Coaching Ltd | London | 2026 |
| ALL in Fitness Ltd | Cumbernauld | 2017 |