| Abpharm Analytical Consultancy Limited | Thame | 2012 |
| Abpm Ltd | Glasgow | 2025 |
| Abpmc Ltd | Stockton-On-Tees | 2026 |
| Abpmx Ltd | London | 2024 |
| Abps Limited | Isleworth | 2004 |
| ABQ Lemmings Ltd | Liverpool | 2021 |
| ABQ Studio Limited | Hove | 2002 |
| Abqarino Ltd | London | 2025 |
| ABR Associates Limited | Pinner | 2009 |
| ABR Brandketing Studio Ltd | Chorley | 2024 |
| ABR Consult Ltd | Reigate | 2023 |
| ABR Ecology Ltd | Bournemouth | 2018 |
| ABR Engineering Consultants Limited | Aberdeen | 1997 |
| ABR Engineering Ltd | Blackburn | 2017 |
| ABR Films & Productions Limited | Birmingham | 2019 |
| ABR Financial Solutions Ltd | Exeter | 2025 |
| ABR Foods Limited | London | 1965 |
| ABR Safety Limited | Swindon | 2016 |
| ABR Services Limited | Tonbridge | 1993 |
| ABR Solicitors Limited | Leeds | 2010 |
| ABR Tamwil Limited | London | 2021 |
| ABR3 Ltd | Ringwood | 2017 |
| Abra Business Consultants Limited | Bassingbourn | 2021 |
| Abra Marketing Management Limited | Ruislip | 2026 |
| Abra Millar Limited | Salisbury | 2016 |
| Abracadabra Broadcasting & Communications Limited | Shoreham-By-Sea | 2005 |
| Abracadabra Ltd | Cambridge | 2024 |
| Abracs 2013 Limited | Leeds | 2013 |
| Abraham & Associates Accountants Limited | Southend-On-Sea | 2017 |
| Abraham & Co Solicitors Ltd | London | 2021 |
| Abraham & Sons Lawyers and Consultants Ltd | Liverpool | 2024 |
| Abraham Accountants Ltd | Bradford | 2001 |
| Abraham and Associates Limited | Southend-On-Sea | 2011 |
| Abraham Associates Burnley Limited | Bradford | 2025 |
| Abraham Associates UK Wide Limited | Bradford | 2022 |
| Abraham Baron Solicitors Ltd | Birmingham | 2015 |
| Abraham Consultancy Limited | Bradford | 2017 |
| Abraham Daniel Limited | London | 2008 |
| Abraham Finance Limited | Ilford | 2023 |
| Abraham Management Limited | Sittingbourne | 2022 |
| Abraham Nominees Limited | | 1988 |
| Abraham Pants Limited | Edgware | 2022 |
| Abraham Photography Limited | Hull | 2015 |
| Abraham Solicitors Ltd | Wrexham | 2010 |
| Abrahams (Yorkshire) Ltd | Bradford | 2020 |
| Abrahams Consulting Engineers Limited | Swansea | 2025 |
| Abrahams Law Limited | Walsall | 2013 |
| Abrahams Legal Consultancy Ltd | Bournemouth | 2020 |
| Abrahams Securities Limited | Egham | 1990 |
| Abrahamsm Limited | London | 2024 |
| Abrahamson Foster Ltd | Hinckley | 2009 |
| Abrahamsons Ltd | London | 2025 |
| Abrakebabra Limited | Coventry | 2011 |
| Abram & Co. Ltd | Manchester | 2017 |
| Abram Communications Limited | Norwich | 2020 |
| Abrams Archaeology Limited | Hitchin | 2020 |
| Abrams Ashton Group Limited | Preston | 2017 |
| Abrams Associates Limited | Mitcham | 2003 |
| Abrams Consulting Limited | Brighton | 2024 |
| Abrams Hughes Associates Limited | Chester | 2015 |
| Abramson Hall Limited | Leeds | 2014 |
| Abraxas Advisory Ltd | Stockport | 2026 |
| Abraxas Ecology Limited | Cowbridge | 2015 |
| Abraxas Marketing Ltd | Hemel Hempstead | 2017 |
| Abraxas Photography & Video Ltd | | 2005 |
| Abraxas Wedding Services Ltd | London | 2017 |
| Abraxysglobal Limited | Holyport, Maidenhead | 2012 |
| Abrd Consultancy Ltd | Waltham Abbey | 2025 |
| Abrdn Corporate Secretary Limited | Edinburgh | 2017 |
| Abrdn Investments (General Partner UK Shopping Centre Feeder Fund LP) Limited | London | 2006 |
| Abreha Consultants Ltd | London | 2022 |
| Abrehart Ecology (Sussex) Ltd | Hardham | 2026 |
| Abrehart Ecology Limited | Woodbridge | 2016 |
| Abrehart Lilley Limited | Devon | 2003 |
| Abreshane Limited | London | 2013 |
| Abreu Global Services Ltd | London | 2026 |
| Abreu Studio Ltd | London | 2023 |
| Abrevia UK Ltd | London | 2025 |
| Abrex Limited | London | 2002 |
| Abri Berry Conseil Ltd | High Wycombe | 2026 |
| Abrialle Engineering & Consultancy Limited | Hull | 2024 |
| Abridge & Partners Limited | Ilford | 2022 |
| Abridge Certificates Limited | Epping | 2012 |
| Abridge Consulting Solutions Ltd | Grangemouth | 2024 |
| Abridge Court (Waltham Cross) Limited | Hertfordshire | 1989 |
| Abridge Partners Limited | Ilford | 2026 |
| Abries Ltd | Watford | 2012 |
| Abrilla Limited | London | 2020 |
| Abris Consulting Ltd | Glasgow | 2013 |
| Abro Engineering (East Anglia) Ltd | Great Yarmouth | 2013 |
| Abro Engineers Limited | Belper | 2003 |
| Abroa Capital Limited | Colchester | 2021 |
| Abroad Board Ltd | London | 2026 |
| Abroad Finance Ltd | Twickenham | 2013 |
| Abroad UNI Network Limited | London | 2022 |
| Abroadline UK Ltd | Bury St. Edmunds | 2023 |
| Abronhill Project Services Ltd | Grangemouth | 2013 |
| Abrook Consultants Limited | Middlesbrough | 2017 |
| Abros Associates Limited | Surrey | 1992 |
| Abros Consultants Limited | | 1998 |