| ABC Digital Distribution Limited | London | 2008 |
| ABC Digital Publishing Limited | London | 2017 |
| ABC Digital Services Limited | London | 2020 |
| ABC Driving Ltd | London | 2023 |
| ABC Edit Ltd | Edgware | 2024 |
| ABC Enterprise Systems Limited | Milton Keynes | 2001 |
| ABC Entertainment Limited | London | 2013 |
| ABC Firm Ltd | London | 2024 |
| ABC Food Market Ltd | Uxbridge | 2013 |
| ABC Gamers Ltd | London | 2018 |
| ABC Global Market Ltd | Leicester | 2025 |
| ABC Installations Limited | Ossett | 2016 |
| ABC IT and Business Solutions Ltd | Hounslow | 2022 |
| ABC IT Consultancy Ltd | Oldham | 2017 |
| ABC IT Limited | Bishop Auckland | 2015 |
| ABC IT Solutions Ltd | Minehead | 2021 |
| ABC Labs Ltd | Caerdydd | 2026 |
| ABC MED Academy Ltd | London | 2026 |
| ABC Media Ltd | Winchester | 2024 |
| ABC Micros Limited | London | 1982 |
| ABC Music London Limited | Southall | 1966 |
| ABC Music Publishing Limited | Altrincham | 1996 |
| ABC Networking Limited | Salisbury | 2002 |
| ABC of Opera Ltd | Pontyclun | 2016 |
| ABC Online Courses Limited | Melksham | 2019 |
| ABC Phonix Technology CYF | Swansea | 2023 |
| ABC Programme Consultants Limited | Hildenborough | 2015 |
| ABC Project Solutions Ltd | Poole | 2024 |
| ABC Publishers Limited | Birmingham | 1997 |
| ABC Radio C.I.C. | Aldeburgh | 2020 |
| ABC Records Limited | Cheshire | 2010 |
| ABC SAP Security and GRC Consulting Limited | Hugglescote | 2011 |
| ABC Self Assessment Ltd | Bath | 2013 |
| ABC Simplicity Limited | Tavistock | 2016 |
| ABC Soft Limited | Milton Abbas | 1997 |
| ABC Software Ltd | Southend On Sea | 2018 |
| ABC Sonix Ltd | London | 2022 |
| ABC Studios International Limited | London | 2013 |
| ABC Tech Link Ltd | Southall | 2026 |
| ABC Techgroup Ltd | London | 2023 |
| ABC Telecomms & Utilities Limited | London | 2013 |
| ABC Television Ltd | Guildford | 2014 |
| ABC Trio Innovation Ltd | Coventry | 2021 |
| ABC Utility Group Limited | Royston | 2021 |
| ABC UX Ltd | London | 2018 |
| ABC Vascular Limited | West Horsley | 2017 |
| ABC Video Facilities Limited | Chorley | 2003 |
| ABC Wizards Limited | Grays | 2000 |
| Abc-Rs News and Media Agency Limited | London | 2022 |
| ABC. DEV. Force Limited | Feltham | 2017 |
| Abc.Xyz Holdings Ltd | Towcester | 2016 |
| Abcd 365 Ltd | London | 2026 |
| Abcd Content Services Ltd | Perth | 2026 |
| Abcd Services Limited | Morley | 2020 |
| Abce Films Ltd | High Wycombe | 2025 |
| Abceasystream International Ltd | Ilkeston | 2019 |
| Abcfirst Limited | Sutton | 1999 |
| Abchak Ltd | London | 2021 |
| Abchurch Telecoms Installations Ltd | Hemel Hempstead | 2024 |
| Abcjphillips Analysis and Testing Ltd | Saffron Walden | 2012 |
| Abclink Ltd | Southall | 2019 |
| Abco Payroll Limited | Bishops Stortford | 1977 |
| Abco Software Limited | Reading | 1997 |
| Abcode Ltd | Chesterfield | 2024 |
| Abcoding Ltd | Cardiff | 2014 |
| Abcoins Technologies Ltd. | West Midlands, England | 2026 |
| Abcollab Ltd | London | 2022 |
| Abconsultancy Services Ltd | Harrow | 2008 |
| Abcs Solutions Limited | Dundee | 2021 |
| Abcs Technologies Ltd | Rainhill | 2024 |
| Abct.Net Limited | Wirral | 2016 |
| Abcum Ltd | London | 2009 |
| Abcz Consulting Limited | Harrow | 2013 |
| ABD Accountancy Ltd | London | 2022 |
| ABD International Ltd | Maidenhead | 2019 |
| Abdalla Consulting Ltd | Slough | 2019 |
| Abdalla Ltd | London | 2024 |
| Abdap Limited | Romford | 2022 |
| Abdel-Moniem IT Services Ltd | Bury St. Edmunds | 2014 |
| Abdelcom Services Ltd | London | 2025 |
| Abdelmagid Software Consultants Ltd | London | 2019 |
| Abdheem Limited | Grays | 2025 |
| Abdi Limited | Edgware | 2024 |
| Abdico Records Ltd | Crowthorne | 2024 |
| Abdikadir Limited | London | 2022 |
| Abdikhadir Solutions Limited | London | 2025 |
| Abdirahman Adan Limited | London | 2021 |
| Abdirahman SED Ltd | London | 2022 |
| Abditech Ltd | London | 2022 |
| Abdkhan Limited | Birmingham | 2025 |
| Abdo Publications Limited | Canterbury | 1989 |
| Abdsoft Ltd | Nottingham | 2019 |
| Abdul and Aneesa Ltd | Rainham | 2025 |
| Abdul Halim Sujon Consultancy Limited | London | 2025 |
| Abdul-Rahim Holdings Ltd | Kington | 2026 |
| Abdulahi Jama Ltd | London | 2024 |
| Abdulcommunication Ltd | London | 2021 |
| Abduljapar Ltd | London | 2022 |
| Abdullah B Sharif Media Ltd | London | 2026 |
| Abdullahi & Co Ltd | London | 2023 |