| Abak Systems and Investment Limited | Colchester | 2007 |
| Abaka Tech Limited | Wembley | 2022 |
| Abakusiq Limited | London | 2024 |
| Abakuss Limited | London | 2008 |
| Abalto Ltd | Coventry | 2003 |
| Abamog Ltd | Bristol | 2024 |
| Abandon Music Publishing Limited | Ashford | 2011 |
| Abandon Music Recordings (UK) Limited | Ashford | 2007 |
| Abandon Normal Devices | Manchester | 2007 |
| Abantic.Com Ltd | Southall | 2024 |
| Abany Consulting Limited | Brierley Hill | 2010 |
| Abap Central Limited | Woking | 2007 |
| Abap Developments Limited | Canterbury | 2009 |
| Abap Limited | Bampton | 2025 |
| Abapa Ltd | London | 2025 |
| Abapere IT Oxford Limited | Oxford | 2019 |
| Abaporu Limited | London | 2013 |
| Abaq Tech Ltd | London | 2026 |
| Abaqs AI Limited | Loughton | 2026 |
| Abaqus Solutions Limited | London | 2024 |
| Abara Limited | Stourbridge | 2026 |
| Abarak Resources Limited | Chatham | 2024 |
| Abarbala Ltd | Edinburgh | 2023 |
| Abardo Ltd | Wokingham | 2020 |
| Abari I.T Solutions Ltd | Potters Bar | 2023 |
| Abarise Limited | Doncaster | 2023 |
| Abas IT Limited | London | 2015 |
| Abas Solutions Ltd | Leeds | 2017 |
| Abas UK Limited | N Lincolnshire | 1995 |
| Abaseen Digital Limited | Oldham | 2023 |
| Abaset Collections Ltd | Cardiff | 2020 |
| Abasileuton Ltd | Ely | 2025 |
| Abasilica Limited | Kingsbridge | 2014 |
| Abataz Digital Solutions Ltd | Salford | 2023 |
| Abatech Ltd | Chesterfield | 2018 |
| Abatis (UK) Limited | London | 2005 |
| Abatsamara Limited | Brighton | 2025 |
| Abattia Group Limited | Glastonbury | 2000 |
| Abav Services Ltd | London | 2012 |
| Abavus Consulting Limited | London | 2018 |
| Abavus Limited | South Woodford | 2007 |
| Abax Consulting Ltd | Poole | 2024 |
| ABB (Telford) Ltd | Telford | 2016 |
| ABB Alice Group Limited | London | 2011 |
| ABB Alice Limited | London | 2011 |
| Abba + Yankson Limited | London | 2026 |
| Abba Amma Film Limited | Horsham | 2023 |
| Abba Consultancy Ltd | Manchester | 2019 |
| Abba Consulting Ltd | Colchester | 2022 |
| Abbapix Ltd | London | 2021 |
| Abbas Ahmed Consultancy Ltd | Smethwick | 2026 |
| Abbas Technology Limited | London | 2000 |
| Abbas Versi Limited | Edgware | 2022 |
| Abbasi Tech Ltd | London | 2025 |
| Abbasisolutions Ltd | Poole | 2025 |
| Abbaz Ltd | London | 2023 |
| Abbc Limited | London | 2012 |
| Abbcd Limited | Huntingdon | 2023 |
| Abbco Consultancy Limited | Weymouth | 1994 |
| Abbe Consulting Limited | Bradley Stoke | 2016 |
| Abbectim Ltd | Horsham | 2012 |
| Abbentis Limited | Worthing | 2017 |
| Abbero Limited | Blackburn | 2018 |
| Abbess Limited | Larkhall | 2011 |
| Abbeville Films Ltd | London | 2015 |
| Abbey Alexander Partners Ltd | London | 2026 |
| Abbey Analytics Ltd | Rotherham | 2022 |
| Abbey Audio Visual Ltd | Witham | 2024 |
| Abbey Bookbinding & Printing Limited | Cardiff | 2014 |
| Abbey Bridge Consulting Ltd | London | 2023 |
| Abbey Broadcast Communications Limited | London | 1999 |
| Abbey Change Solutions Ltd | Sale | 2019 |
| Abbey Comms Ltd | Pontefract | 2023 |
| Abbey Design Consultants Ltd | Cambridge | 2004 |
| Abbey Digital Ltd | Stirling | 2019 |
| Abbey Film Productions Limited | Dundonald | 2022 |
| Abbey Films Limited | London | 2007 |
| Abbey Gateway Productions Limited | Bristol | 2004 |
| Abbey Global Services Ltd | Dagenham | 2026 |
| Abbey Hill Self Drive Limited | Weybridge | 1987 |
| Abbey Hill Studios Ltd | Taunton | 2010 |
| Abbey Hub Ltd | Lymm | 2025 |
| Abbey ICT Ltd | Blackburn | 1989 |
| Abbey Intelling Limited | Manchester | 2016 |
| Abbey Jenkins Consulting Ltd | Barking | 2025 |
| Abbey Lloyd Limited | Liverpool | 2019 |
| Abbey Newco Limited | Exeter | 2021 |
| Abbey Oaks Limited | Whyteleafe | 2012 |
| Abbey Park Consultancy Limited | Abbots Langley | 2008 |
| Abbey Professional Services Ltd | Guildford | 2026 |
| Abbey Publishing Ltd | Rushden | 2013 |
| Abbey Records Limited | Barnet | 2012 |
| Abbey Residential Ltd | Widnes | 2016 |
| Abbey Road Training Limited | London | 2014 |
| Abbey Road Ventures Ltd | London | 2025 |
| Abbey Services Hampshire Limited | Dartford | 2024 |
| Abbey Support Limited | London | 2001 |
| Abbey Technical Services Ltd | Newtownabbey | 2019 |
| Abbey Technology Solutions Ltd | Pershore | 2022 |
| Abbey View Investments Limited | London | 2015 |