| Afterlive Music Ltd | Sutton | 2020 |
| Aftermarket Arbitrage Ltd | Bolton | 2020 |
| Aftermarket Media Solutions Ltd | Chatham | 2015 |
| Aftermath Gaming Limited | Mildenhall | 2022 |
| Aftermath Group Ltd | Mildenhall | 2025 |
| Aftermath Ltd | London | 2025 |
| Afternoomi Ltd | Purley | 2025 |
| Afternoon Finance Limited | Glasgow | 2024 |
| Afternoon Pictures Ltd | London | 2019 |
| Afternoon Sleeping Ltd | Bournemouth | 2024 |
| Afternoonify Ltd | St. Albans | 2015 |
| Afterparti Ltd | London | 2021 |
| Afterparty Ltd | London | 2026 |
| Afters App Ltd | Bury St. Edmunds | 2026 |
| Aftersbtn Ltd | Hove | 2026 |
| Afterschool Projects Ltd | London | 2025 |
| Afterskills Ltd | London | 2018 |
| Aftertherainproductions Ltd | Woodford Green | 2025 |
| Afterthought Group Ltd | Henfield | 2016 |
| Afterthought Software Ltd. | Bath | 2011 |
| Afterward Productions UK Ltd | London | 2024 |
| Afterwords Legacy Ltd | London | 2025 |
| Afterworks Lighting Creative and Music Productions Ltd | London | 2023 |
| Afthonos Ltd | London | 2023 |
| Aftl Limited | Plymouth | 2025 |
| Afto Tech Limited | Leeds | 2018 |
| Aftokratoria Limited | London | 2024 |
| Aftr App Limited | London | 2019 |
| Aftr Mdnt Ltd | London | 2016 |
| Aftrnow Collective Ltd | Kingston Upon Thames | 2025 |
| Afture Ltd | Grays | 2025 |
| Afunja Music Publishing Ltd | Hungerford | 2019 |
| Afur Limited | Kilmarnock | 2015 |
| AFV Modeller Limited | Morpeth | 2001 |
| AFW Software Solutions Ltd | Stockport | 2023 |
| AFW Technical Consulting Limited | Glasgow | 2011 |
| AFX Audio Visual Services Limited | Cheltenham | 2010 |
| AFX Media Group Ltd | London | 2022 |
| AFX Ventures Limited | London | 2021 |
| AFY Music Limited | Bromsgrove | 2024 |
| Afyarepo Ltd | Wirral | 2019 |
| Afyatech Ltd | Harrow | 2018 |
| Afynd Limited | Ruislip, | 2024 |
| AFZ Labs Ltd | Nuneaton | 2026 |
| AFZ Web Solutions Ltd | London | 2023 |
| Afzal IT Ltd | Woking | 2019 |
| AG & Associates Ltd | London | 2019 |
| AG Appdeploy Consultancy Limited | Bournemouth | 2018 |
| AG Bizcon Ltd | London | 2013 |
| AG Broadcast Ltd | Dereham | 2021 |
| AG Business Consulting Limited | Bramhall | 2021 |
| AG Consult ROM Ltd | Bromley | 2014 |
| AG Consultancy & Apps Ltd | Windsor | 2007 |
| AG Consultants PVT Limited | Luton | 2015 |
| AG Corporate Finance Ltd | London | 2025 |
| AG Cyber Ltd | Gloucester | 2022 |
| AG Digital Consultancy Ltd | Newcastle Upon Tyne | 2026 |
| AG Digital Consulting Ltd | Mold | 2018 |
| AG Digital Ltd | London | 2024 |
| AG Digital Services Ltd | London | 2023 |
| AG Digital Ventures Ltd | London | 2026 |
| AG Engineering Ltd. | Wrexham | 2026 |
| AG Facilators Ltd | London | 2025 |
| AG Films Limited | London | 2012 |
| AG Finance and Technology Group Ltd | London | 2024 |
| AG Finance Systems Ltd | Glenrothes | 2025 |
| AG Golden Limited | Watford | 2013 |
| AG Henley Ltd | Nottingham | 2026 |
| AG Host Ltd | London | 2023 |
| AG Info-Consulting Limited | Uxbridge | 2017 |
| AG Infoconnect Limited | Ipswich | 2017 |
| AG Intelligent Delivery Limited | London | 2018 |
| AG IT Associates Ltd | Middlesbrough | 2019 |
| AG IT Consultancy Limited | Amersham | 2017 |
| AG IT Interim Ltd | London | 2016 |
| AG IT Services Ltd. | Bedford | 2013 |
| AG IT Solutions Ltd | Witham | 2009 |
| AG Labs Ltd | London | 2026 |
| AG Lining Group Ltd | Prestonpans | 2021 |
| AG Lyfe Limited | London | 2015 |
| AG Managed Services Ltd | Market Harborough | 2013 |
| AG Market Data Services Ltd | Maidstone | 2013 |
| AG Market Limited | Cardiff | 2020 |
| AG Mentors Ltd | London | 2016 |
| AG North Digital Limited | Pudsey | 2026 |
| AG Payment Ltd | Preston | 2023 |
| AG Portfolio Ltd | Coalville | 2011 |
| AG Power Ltd | London | 2026 |
| AG Power Services Ltd | Manchester | 2018 |
| AG Production (Oxfordshire) Limited | Banbury | 2013 |
| AG Publishing Ltd | Stockport | 2025 |
| AG Quantum Group Ltd | Felpham | 2026 |
| AG Rain Software (UK) Limited | Dagenham | 2011 |
| AG Remote Ltd | Southall | 2024 |
| AG Research and Analysis Consultancy Limited | London | 2010 |
| AG Research Ltd | London | 2018 |
| AG Soft Limited | London | 2021 |
| AG Tech Consultancy Ltd | Edinburgh | 2018 |
| AG Tech Support Ltd | Peterborough | 2024 |
| AG Tech UK Ltd | Gravesend | 2025 |