| ALL the Happy Things Ltd | Sidmouth | 2025 |
| ALL the Notes Ltd | London | 2024 |
| ALL the Rage (Scarborough) Limited | Scarborough | 2025 |
| ALL the Rage Ltd | Birmingham | 2024 |
| ALL the Right Movies Limited | Seaham | 2019 |
| ALL Things Alpaca Ltd | Chelmsford | 2021 |
| ALL Things Competitions Ltd | Stevenage | 2025 |
| ALL Things Considered Theatre | Liverpool | 2021 |
| ALL Things Creative Ltd | Dorking | 2013 |
| ALL Things Fashion CIC | Enfield | 2025 |
| ALL Things Football Development Ltd | Enfield | 2024 |
| ALL Things Fungi Ltd | Polegate | 2023 |
| ALL Things in One Limited | London | 2017 |
| ALL Things Nice Entertainment Ltd | Grays | 2023 |
| ALL Things Nice Events Ltd | Grays | 2021 |
| ALL Things Pilates Ltd | Kingston Upon Thames | 2013 |
| ALL Things Wild Limited | Stratford-Upon-Avon | 2012 |
| ALL Three Phases Limited | Sheffield | 2014 |
| ALL Time Events UK Ltd | Snodland | 2023 |
| ALL Time Leisure Ltd | High Wycombe | 2026 |
| ALL to Play for Ltd | Stoke-On-Trent | 2018 |
| ALL Together Leisure Ltd | Portsmouth | 2019 |
| ALL Under One Roof Entertainment Ltd | London | 2024 |
| ALL Voice Limited | Weston-Super-Mare | 2013 |
| ALL Wales Sport Ltd | Llanelli | 2012 |
| ALL Warriors Ltd | Ayr | 2019 |
| ALL Ways Good Company C.I.C. | Newcastle Upon Tyne | 2023 |
| ALL Wheel Drive Club | Farnham | 1990 |
| ALL WIN Tennis Ltd | Lytham St. Annes | 2012 |
| ALL Work Training Ltd | Northolt | 2023 |
| ALL Worked OUT Limited | Oxted | 2017 |
| ALL Wrapped UP Events Limited | Oldham | 2020 |
| ALL Your Dance Needs Limited | Ruislip | 2000 |
| ALL Your Occasions Ltd | Belvedere | 2026 |
| All-In Theatre Productions Limited | Norwich | 2018 |
| All-Inc Fitness Limited | Hull | 2017 |
| All-Play Sports Coaching Ltd | Fordingbridge | 2012 |
| All-Rounded Sports Ltd | London | 2025 |
| All-Sides Sports Club C.I.C. | London | 2024 |
| All-Starz Football Academy Limited | Stevenage | 2024 |
| All-Steps Formation Riding Limited | Exeter | 2019 |
| ALL4PICKLEBALL CIC | Ramsgate | 2025 |
| Allaccesspadel Ltd | Wantage | 2025 |
| Allamsaire Limited | London | 2013 |
| Allan Glen's Sports Club Limited | Glasgow | 1989 |
| Allan Swain Health & Fitness Limited | Bradford On Avon | 2013 |
| Allan Wilson Music Limited | Surrey | 2006 |
| Allan Yachting Limited | Bough Beech | 2021 |
| Allanton Arts Limited | Duns | 2025 |
| Allarton Ltd | Bognor Regis | 2016 |
| Allavo Events Limited | Woodstock | 2024 |
| Allballz Ltd | London | 2018 |
| Allcam Ltd | London | 2018 |
| Allcapscircus Limited | Blairgowrie | 2026 |
| Allchem Treatments Limited | Helston | 1983 |
| Allchemedia Ltd | London | 2024 |
| Allchemy Productions Limited | Hemel Hempstead | 2024 |
| Allclear Results Ltd | Bradford | 2025 |
| Allcomersmusic Limited | London | 2009 |
| Alldat Ltd | London | 2019 |
| Allegiant Centre of Performing Arts Limited | Hyde | 2024 |
| Allegorical Limited | London | 2020 |
| Allegory Group, Ltd. | Mitcham | 2025 |
| Allegra on Stage Limited | London | 2025 |
| Allegraphy Ltd | Brighton | 2023 |
| Allegro Gymnastic Academy Limited | Scunthorpe | 2016 |
| Allegro Health and Fitness Ltd | Brentwood | 2016 |
| Allegro Music and Arts Ltd | London | 2023 |
| Allen & Abel Ltd | London | 2017 |
| Allen BJJ Limited | Bedford | 2024 |
| Allen D Cruze Co Ltd | London | 2017 |
| Allen Jones Limited | London | 2011 |
| Allen Walley Limited | Copthorne | 2013 |
| Allen Writing Services Limited | Brighton | 2010 |
| Allendale Creative Artists Community Interest Company | Hexham | 2007 |
| Allerton Arts Ltd | Bradford | 2025 |
| Allerton Golf Trading Limited | Liverpool | 2014 |
| Allerton Photography Ltd | Bristol | 2015 |
| Alleviate Limited | Renfrew | 2022 |
| Alley Farm Livery Services Limited | Kettering | 2017 |
| Alley Way Studios Limited | Bristol | 2020 |
| Alleycat Entertainment Ltd | Sevenoaks | 2018 |
| Alleycrafters Limited | London | 2024 |
| Alleyfit Ltd | Barnet | 2014 |
| Alleyne Dance Ltd. | Enfield | 2016 |
| Allez Allez Limited | London | 2023 |
| Allez HOP Theatre Ltd | London | 2017 |
| Allez Team Ltd | London | 2021 |
| Allform Wellness Limited | Dundee | 2022 |
| Allgolfholidays Ltd | Addlestone | 2024 |
| Allgood Cycling Ltd | Macclesfield | 2024 |
| Allgroom Motorsport Ltd | Ipswich | 2025 |
| Alli Main Associates (UK) Limited | Fitzrovia | 2024 |
| Alliance 121 Limited | Harbury | 2003 |
| Alliance Boxing Academy CIC | Leeds | 2025 |
| Alliance Brazilian JIU Jitsu Ltd | Newmarket | 2026 |
| Alliance Fitness Limited | Llandudno | 2019 |
| Alliance for the Preservation and Expression of Parody and Street Arts Limited | London | 2025 |
| Alliance Myactive Wellbeing Limited | Leek | 2024 |
| Alliance Newcastle Limited | Newcastle Upon Tyne | 2024 |