| Aberfeldy Holdings Ltd | Manchester | 2024 |
| Aberforth Geared Value & Income Trust PLC | London | 2024 |
| Aberforth LGP IA Limited | Midlothian | 2001 |
| Aberforth LGP IB Limited | Midlothian | 2001 |
| Aberforth Smaller Companies Trust PLC | | 1990 |
| Aberforth Split Level Income Trust PLC | London | 2017 |
| Aberforth Unit Trust Managers Limited | | 1990 |
| Abergeldie Holdings Limited | Edinburgh | 2016 |
| Abergele Insurance Consultants Limited | St Asaph | 2007 |
| Aberhelp Ltd | Aberdeen | 2019 |
| Aberlady Inn Limited | Holywood | 2020 |
| Aberlink Holdings Limited | Stroud | 2020 |
| Abernile Limited | Beaconsfield | 2014 |
| Abersea Limited | London | 2022 |
| Aberthaw Energy (Holdings) Limited | Chelmsford | 2022 |
| Abertillery Holdings Limited | Ashford | 1986 |
| Abess Holdings Limited | Reading | 2018 |
| Abeto Holdings Limited | Leeds | 2020 |
| ABF (NO.2) Limited | London | 1997 |
| ABF (NO.3) Limited | London | 1919 |
| ABF BRL Finance Ltd | London | 2017 |
| ABF Capital Limited | London | 2025 |
| ABF MXN Finance Limited | London | 2011 |
| ABF Operations Limited | Warrington | 2022 |
| ABF ZMW Finance Limited | London | 2021 |
| Abfp Holdings Ltd | Norwich | 2024 |
| Abfp Limited | Crowborough | 2019 |
| ABFS2 Limited | Croydon | 2020 |
| ABG 1 Ltd | Sutton | 2023 |
| ABG Commodities Ltd | London | 2018 |
| ABG Group Limited | Swansea | 2026 |
| Abg-Dockers Limited | Altrincham | 2025 |
| Abg-Glow UK Limited | Altrincham | 2025 |
| Abg-Tb Bidco (UK) Limited | Altrincham | 2022 |
| Abg-Tb Holdco (UK) Limited | Altrincham | 2022 |
| Abg-Tb Topco (UK) Limited | Altrincham | 2022 |
| Abglp Group Ltd | Bury St. Edmunds | 2023 |
| ABH (Holdings) Ltd | Chesterfield | 2023 |
| ABH Transport Limited | London | 2025 |
| ABH1 Limited | Stockton-On-Tees | 2024 |
| ABH2 Limited | Stockton-On-Tees | 2024 |
| ABH3 Limited | Stockton-On-Tees | 2024 |
| ABH4 Limited | Stockton-On-Tees | 2024 |
| Abhainn Dubh Holdings Limited | Edinburgh | 2022 |
| Abhaya Care Limited | Hayes | 2014 |
| Abhaya Investments Limited | Hayes | 2014 |
| Abhi Holdings Limited | Preston | 2023 |
| Abhidiya Investments Ltd | Altrincham | 2026 |
| Abhiman Investments Ltd | Amersham | 2018 |
| Abhivio Ltd | London | 2025 |
| Abhl Holdco Limited | Batley | 2025 |
| ABI Financial Services Ltd | Chesterfield | 2025 |
| ABI FOL Consulting Limited | London | 2012 |
| ABI Group Enterprises Ltd | Manchester | 2026 |
| ABI Middle Americas Holding II Limited | London | 2016 |
| ABI Pension Trustee Limited | London | 2026 |
| ABI Scientific Holdings Limited | Hove | 2025 |
| ABI Southern Holding Ltd | London | 2001 |
| ABI Stubbs Next Generation Investments Ltd | Louth | 2024 |
| Abid Jaffer Holdings Ltd | Bognor Regis | 2025 |
| Abide Capital Ltd | London | 2026 |
| Abiding Abodes Limited | Bradford | 2025 |
| Abiel Dawit Tekle Limited | London | 2025 |
| Abiel Holdings Limited | Manchester | 2022 |
| Abiezer Holdings Limited | London | 2022 |
| Abigail Finance Ltd | London | 2025 |
| Abigail Funding 1 Ltd | London | 2025 |
| Abigroup Holdings Limited | Salisbury | 2014 |
| Abilash & Co Holdings Ltd | Cleethorpes | 2026 |
| Ability Bathe Holdings Ltd | Halifax | 2019 |
| Ability Cambridge Seven Ltd | Brentford | 2019 |
| Ability Charter London Limited | Brentford | 2015 |
| Ability Holdings Ltd | Enfield | 2025 |
| Ability Hotels (Aberdeen) Holdings Limited | Brentford | 2014 |
| Ability Hotels (Edinburgh) Holdings Limited | Brentford | 2014 |
| Ability Hotels (Edinburgh) Number 1 Limited | Brentford | 2019 |
| Ability Hotels (Edinburgh) Number 2 Limited | Brentford | 2019 |
| Ability Hotels (III) Finance Limited | London | 2014 |
| Ability Hotels (III) Group Limited | Brentford | 2014 |
| Ability Hotels (III) Holdings Limited | Brentford | 2014 |
| Ability Hotels (III) UK Limited | Brentford | 2014 |
| Ability Hotels (IV) Finance Limited | Brentford | 2014 |
| Ability Hotels (IV) Group Limited | Brentford | 2014 |
| Ability Hotels (IV) Holdings B Limited | Brentford | 2019 |
| Ability Hotels (IV) Holdings Limited | Brentford | 2014 |
| Ability Hotels (IV) UK Limited | Brentford | 2014 |
| Ability Hotels (Luton) Limited | London | 2008 |
| Ability Hotels (Manchester) Holdings Limited | Brentford | 2014 |
| Ability Hotels (Newcastle) Holdings Limited | Brentford | 2014 |
| Ability Hotels (Peterborough) Holdings Limited | Brentford | 2014 |
| Ability Hotels (Southport) Holdings Limited | Brentford | 2014 |
| Ability Hotels (V) Finance Limited | Brentford | 2016 |
| Ability Hotels (V) Group Limited | Brentford | 2016 |
| Ability Hotels (V) Holdings Limited | Brentford | 2016 |
| Ability Hotels (V) UK Limited | Brentford | 2016 |
| Abimar Brokers Limited | Tunbridge Wells | 2018 |
| Abin Investment Limited | London | 2021 |
| Abinaas Limited | Letchworth Garden City | 2018 |
| Abingdon Risk Consulting Limited | Ferndown | 2011 |
| Abinger Capital Limited | London | 2014 |