| Alantra Partners International Limited | London | 2019 |
| Alantrev Ltd | New Quay | 2024 |
| Alara DUO Limited | Oxted | 2018 |
| Alara Finance Limited | London | 2024 |
| Alara Holdings Limited | London | 2024 |
| Alara Investments Limited | Oxted | 2013 |
| Alara Trustee Limited | London | 2024 |
| Alaric Securities (UK) Ltd | London | 2016 |
| Alario Dielhenn Ltd | Bedford | 2021 |
| Alaris Corporate Finance Limited | London | 2003 |
| Alaris HQ Ltd | London | 2024 |
| Alaris the RF Technology Group Ltd | Lincoln | 2025 |
| Alarmbuild Limited | York | 2002 |
| Alaro Investments Ltd | Kingsbridge | 2020 |
| Alas Investments Limited | Nottingham | 2024 |
| Alasan Holdings Ltd | London | 2024 |
| Alaska Engineering Holding Ltd | London | 2024 |
| Alaska Midco 1 Limited | London | 2023 |
| Alaska Topco Limited | London | 2023 |
| Alastair Hanson Limited | Huddersfield | 2009 |
| Alastair James Insurance Brokers Limited | Cheltenham | 2017 |
| Alastair Mchenry Construction Holdings Ltd | Ballycastle | 2022 |
| Alastair Paterson Limited | Newton Stewart | 2025 |
| Alastair Rose Limited | Derby | 2025 |
| Alastair Saville Financial Services Ltd | Liverpool | 2009 |
| Alastone Limited | Bexleyheath | 2023 |
| Alat Technologies UK Ltd. | London | 2025 |
| Alatus Capital UK Limited | London | 2024 |
| Alauro Limited | London | 2014 |
| Alaw Holdings Ltd | Chesterfield | 2019 |
| Alawad Group Ltd | London | 2023 |
| Alawihub Digital Holdings Ltd | Mildenhall | 2026 |
| Alawihub Global Ltd | London | 2026 |
| Alawihub Property Group Ltd | Bury St. Edmunds | 2026 |
| Alawihub Real Estate Holdings Ltd | London | 2026 |
| Alawihub Wellness Ltd | Bury St. Edmunds | 2026 |
| Alawihubuk Limited | Bury St. Edmunds | 2026 |
| Alaya Finance Limited | London | 2025 |
| Alaya Mortgages Ltd | Swansea | 2026 |
| Alayar Holdings Limited | Manchester | 2017 |
| Alayna & Chloe Holdings Limited | Plymouth | 2019 |
| Alayna Associates Ltd | Leicester | 2014 |
| Alayna Investments Ltd | Hounslow | 2022 |
| Alazhari Holdings UK Ltd | London | 2025 |
| ALB Capital Holdings Limited | London | 2024 |
| ALB Capital Markets Limited | Winchester | 2023 |
| ALB Group Holdings Ltd | St. Albans | 2023 |
| ALB Holdings Limited | London | 2025 |
| ALB Management Consultants Limited | Winchester | 2023 |
| ALB Medvoyage Ltd | Oxford | 2025 |
| ALB Simpson Ltd | London | 2022 |
| ALB Technologies Limited | Abingdon | 2017 |
| ALB Trading Ltd | London | 2025 |
| Alba Advisory Limited | London | 2015 |
| Alba Life Trustees Limited | Edinburgh | 1956 |
| Alba Mews Ltd | Diss | 2024 |
| Alba Mineral Resources Limited | London | 2026 |
| Alba Self Assessment Services (Albasas) Ltd | London | 2020 |
| Albacap Limited | East Kilbride | 2018 |
| Albaco Limited | East Kilbride | 2018 |
| Albacore Capital (UK) Limited | London | 2016 |
| Albain Bidco UK Limited | London | 2013 |
| Alban Actuarial Solutions Ltd | Herts | 2007 |
| Alban Associates Limited | Grampian | 1999 |
| Alban Blinds Holdings Ltd | Welham Green | 2023 |
| Alban Financial Services Limited | Harpenden | 2014 |
| Alban Investco Limited | Barnstaple | 2024 |
| Alban Marshall Finance Limited | London | 1979 |
| Alban Spring (Epsilon) Holdco Limited | London | 2020 |
| Alban Spring (Hub) Holdings Limited | London | 2019 |
| Alban Spring (Salamanca) Holdco Limited | London | 2021 |
| Alban Spring GP Limited | London | 2019 |
| Alban Spring Investments Limited | London | 2019 |
| Alban Spring Master Holdco Limited | London | 2019 |
| Albangroup Limited | Finchley Road | 2021 |
| Albani Limited | Henley-On-Thames | 2006 |
| Albansky Holdings Limited | London | 2012 |
| Albanwise Holdings Limited | Cambridge | 2021 |
| Albanwise Insurance Services Limited | Cambridge | 1980 |
| Albanwise Wallace Estates Limited | Cambridge | 2019 |
| Albany Continuation | London | 1994 |
| Albany Creative Capital Ltd | Walton-On-Thames | 2025 |
| Albany DP Holdings Ltd | Clacton-On-Sea | 2024 |
| Albany Financial Consultants Limited | Brighton | 2004 |
| Albany Global Investment Limited | London | 2024 |
| Albany Holdings Limited | London | 2025 |
| Albany Insurance Brokers Limited | Leicester | 2023 |
| Albany Investment Limited | London | 2015 |
| Albany Mortgage Solutions Limited | Loughborough | 2007 |
| Albany Park Mortgages Limited | Fareham | 2024 |
| Albany Piccadilly Trustee Company NO.1 Limited | London | 2015 |
| Albany Piccadilly Trustee Company NO.2 Limited | London | 2015 |
| Albany Ventures Management Services Limited | Manchester | 2009 |
| Albasure Ltd. | | 2004 |
| Albatoria UK Ltd | London | 2025 |
| Albatros Group Ltd | London | 2017 |
| Albatross 1 Limited | London | 2021 |
| Albatross Adjusters (UK) Limited | London | 2024 |
| Albatross Group Holdings Limited | Aylesford | 2008 |
| Albatross JL Limited | London | 2024 |