| APH Supplements Limited | Lytham St. Annes | 2020 |
| Aphasia Ltd | London | 2025 |
| Aphex Events Ltd | Tadley | 2023 |
| Aphm Limited | Loughborough | 2007 |
| Aphobos Crossfit Fitness Group Ltd | Bromley | 2024 |
| Aphobos Crossfit Ltd | Dartford | 2016 |
| Aphobos Sevenoaks Ltd | Dartford | 2024 |
| Aphra Shemza Limited | Eastbourne | 2024 |
| Aphrodite Creates Ltd | London | 2022 |
| API Fitness Limited | Cockermouth | 2018 |
| Apiary London Limited | Tower Hamlets | 2010 |
| APJ Attractions Ltd | York | 2025 |
| APK Media Ltd | London | 2021 |
| APL Leisure Ltd | Folkestone | 2023 |
| APL Theatre Ltd | London | 2015 |
| Aplco Limited | London | 2024 |
| Apldn Events Ltd | Mildenhall | 2024 |
| Aplite Sport Limited | Loughborough | 2023 |
| Apmb Ltd | Birmingham | 2024 |
| APN Creative Services Limited | Plymouth | 2016 |
| Apna Functions Limited | Manchester | 2017 |
| Apna Golf Ltd | Newcastle Upon Tyne | 2024 |
| Apocalipstick Entertainments Limited | Weston-Super-Mare | 2025 |
| Apocalypse Academy Ltd | Sheffield | 2024 |
| Apocalypse Events Ltd | Bexhill On Sea | 2012 |
| Apocalypse Fitness Limited | Macclesfield | 2020 |
| Apocalypse Limited | Chorley | 2017 |
| Apocalypse Paintball Limited | Royston | 2003 |
| Apocalypso Pictures Limited | Fordingbridge | 1998 |
| Apodarto Ltd | London | 2016 |
| Apodini Creations Limited | Newcastle Upon Tyne | 2024 |
| Apogee Promotions Ltd | Milton Keynes | 2018 |
| Apollo Artist Management Limited | London | 2017 |
| Apollo Bookmakers Limited | Loughton | 2010 |
| Apollo Concert Venue Ltd | Blackpool | 2011 |
| Apollo Dance Limited | Brentford | 2021 |
| Apollo Dionysus Music Group Ltd | Waterlooville | 2023 |
| Apollo DJS Limited | Ilkeston | 2024 |
| Apollo Earth Productions Limited | Bristol | 2013 |
| Apollo Entertainments Ltd | Wolverhampton | 2025 |
| Apollo Europa Limited | London | 2016 |
| Apollo Event Consultants Ltd | Surrey | 2002 |
| Apollo Events Live Limited | Derby | 2025 |
| Apollo Festivals Ltd | London | 2026 |
| Apollo Fitness Limited | Stockport | 2010 |
| Apollo Fitness Studio Ltd | Iver | 2024 |
| Apollo Funk Entertainments Ltd | Ashford | 2026 |
| Apollo Gym (Coventry) Limited | Coventry | 2012 |
| Apollo Gym Ltd | Birmingham | 2017 |
| Apollo Health & Fitness Ltd | London | 2024 |
| Apollo Health Collective Pilates Limited | Wymondham | 2026 |
| Apollo Hospitality Group Ltd | London | 2024 |
| Apollo House Band Ltd | London | 2023 |
| Apollo Leeds Ltd | Durham | 2026 |
| Apollo Music Management Limited | Sutton Coldfield | 2017 |
| Apollo Painting School | London | 2024 |
| Apollo Pavilion Projects CIC | Peterlee | 2021 |
| Apollo Sports Management Limited | London | 2019 |
| Apollo TC Ltd | Durham | 2024 |
| Apollo Theatre Arts Ltd | Southwick | 2021 |
| Apollo Theatre Company Ltd | Portishead | 2010 |
| Apollo Wellness & Performance Limited | Basingstoke | 2023 |
| Apollo's Llanedeyrn & Pentwyn Amateur Boxing Club CIC | Cardiff | 2021 |
| Apollonia Llewellyn Ltd | Ossett | 2025 |
| Apollos Boxing Limited | Bolton | 2020 |
| Apollo’S Community CIC | Bolton | 2026 |
| App Effects UK Limited | Middlesex | 2013 |
| App Frod Sports Club CIC | Scunthorpe | 2025 |
| Appaloosa Yachting Limited | Titchfield | 2004 |
| Apparently Ltd | Wadhurst | 2022 |
| Apparition Ltd | London | 2025 |
| Appas Events Limited | Bognor Regis | 2022 |
| Appendix Ltd | London | 2024 |
| Appeti Tennis Limited | London | 2003 |
| Appfest Ltd | Bristol | 2017 |
| Appiason Sports Management Limited | Croydon | 2016 |
| Applause Theatre Group Ltd | London | 2024 |
| Applause Theatreworks Ltd | Huddersfield | 2020 |
| Applausestore Productions Limited | London | 2020 |
| Applauz CIC | Bury | 2024 |
| Apple & Bean Ltd | Saffron Walden | 2022 |
| Apple Barn Studio Ltd | Totnes | 2024 |
| Apple Corps Limited | | 1963 |
| Apple Fitness Ltd | Wigan | 2013 |
| Apple Juice Entertainment Limited | Hornchurch | 2022 |
| Apple Leisure Limited | London | 2018 |
| Apple Publishing Limited | | 1967 |
| Apple Racing Limited | London | 2021 |
| Apple Records Ltd | London | 2017 |
| Apple Tomato Pear and Peach Limited | Cardiff | 2021 |
| Apple Tree Decor Ltd | Oldham | 2018 |
| Applebees Fitness Ltd | Taunton | 2019 |
| Appleby Bowers Creative Associates Limited | Manchester | 2000 |
| Appleby Collective Ltd | London | 2024 |
| Appleby Cottage C.I.C. | Hertford | 2017 |
| Appleby Dance Company Ltd | Newcastle Upon Tyne | 2021 |
| Appleby Golf Club Limited | Appleby-In-Westmorland | 2024 |
| Appleby Sports Centre Limited | Cumbria | 2006 |
| Applecreek Productions Limited | London | 2003 |
| Applecross Historical Society | Applecross | 2000 |