| Algorithm Limited | Newark | 2021 |
| Algorithm Tradings Ltd | Kington | 2025 |
| Algorithmic Trading Limited | Wigan | 2025 |
| Algoros Limited | London | 2023 |
| Algotech Ltd | Neath | 2018 |
| Algotiq Holdings Ltd | London | 2025 |
| Algotron Tech Ltd | Coventry | 2021 |
| Algra Stamrecht Ltd | Doncaster | 2008 |
| Algreat Professional Services Limited | Macclesfield | 2009 |
| ALGT94 Limited | Nottingham | 2021 |
| ALH & Sons Ltd | Stirling | 2022 |
| ALH Investments Ltd | Basingstoke | 2025 |
| ALH Shareholdings Ltd | Haltwhistle | 2026 |
| Alhafidh Limited | Birmingham | 2015 |
| Alham Farm Limited | Shepton Mallet | 2014 |
| Alhama Holdings Limited | Livingston | 2018 |
| Alhama UBB Limited | Livingston | 2019 |
| Alhambra Dolci Limited | Halifax | 2019 |
| Alhambra Holdco Limited | London | 2020 |
| Alhambra Topco Limited | London | 2020 |
| Alhas Holding Group Limited | London | 2026 |
| Alhasanu Global Trade Ltd | London | 2026 |
| Alhaso Management (UK) Limited | Croydon | 2015 |
| Alhco Group Limited | London | 2009 |
| Alhl 123 Limited | Manchester | 2025 |
| ALI & Akhter Holding Ltd | Nottingham | 2026 |
| ALI & Co Holdings Ltd | High Wycombe | 2026 |
| ALI & Jaffer Holdings Ltd | Bognor Regis | 2025 |
| ALI & Michelle Enterprises Limited | Cambridge | 2024 |
| ALI Accountancy Services Ltd | Nottingham | 2016 |
| ALI Asset Holdings Ltd | London | 2021 |
| ALI Barbers Group Limited | Manchester | 2017 |
| ALI Barbers Holdings Ltd | Enfield | 2020 |
| ALI Brothers Group Ltd | Manchester | 2025 |
| ALI Care Holding Ltd | Nottingham | 2025 |
| ALI Crystal UK Limited | Newtownabbey | 2025 |
| ALI Currency Exchange Ltd | London | 2026 |
| ALI Holdco Ltd | Birmingham | 2026 |
| ALI Investment Capital Ltd | Nottingham | 2024 |
| ALI Legacy Capital Ltd | Hoddesdon | 2017 |
| ALI Mashadi Limited | Colchester | 2020 |
| Ali-Has Property Ltd | London | 2025 |
| Ali-Shah Holdings Limited | Birmingham | 2023 |
| Alia Amce Holdco Limited | London | 2021 |
| Alia Amce Super Topco Limited | London | 2022 |
| Alia Amce Topco Limited | London | 2022 |
| Alia Assets Management Ltd | Cardiff | 2022 |
| Alia Financial Services Limited | Cambridge | 2018 |
| Alianza UK Technologies Limited | Altrincham | 2024 |
| Aliata Limited | Watford | 2015 |
| Aliaxis Holdings UK Limited | Huntingdon | 2000 |
| Aliazan Investments UK Limited | London | 2024 |
| Alibail Ltd | Darlington | 2024 |
| Alibay-Mace Limited | Christchurch | 2023 |
| Alicatjam | Barnsley | 2018 |
| Alice Castle Limited | London | 2014 |
| Alice Charlotte Capital Limited | 139 Fountainbridge | 2017 |
| Alice Oliver Limited | Newry | 2019 |
| Alice R Wilkes Holdings Limited | London | 2025 |
| Alice Rose Enterprises Limited | London | 2020 |
| Alice Tartt Limited | Liverpool | 2025 |
| Alicemoira Ltd | Oldham | 2026 |
| Alicia Baker Consultancy Ltd | Folkestone | 2016 |
| Alico Property Group Ltd | Birmingham | 2025 |
| Alico Services (UK) Ltd | Liverpool | 2013 |
| Alicorn (PHX) OSS II Limited | London | 2025 |
| Alicorn Global Ventures Limited | London | 2020 |
| Alicorn Limited | London | 2022 |
| Alidina Capital Ltd | London | 2018 |
| Alidina Holdings Ltd | South Croydon | 2022 |
| Alien World Ltd | London | 2026 |
| Aliena Artis Limited | London | 2021 |
| Aliena Divitiae Ltd | Edinburgh | 2025 |
| Alienor Sachs Ltd | London | 2022 |
| Alienvestra Limited | London | 2024 |
| Alif (NO. 3) Nominee 1 Limited | London | 2021 |
| Alif (NO. 3) Nominee 2 Limited | London | 2021 |
| Alif (NO.2) Nominee 1 Limited | London | 2020 |
| Alif (NO.2) Nominee 2 Limited | London | 2020 |
| Alif (Scotland) Limited | Glasgow | 2019 |
| Alif Capital Holdings Limited | London | 2019 |
| Alif Global Ltd | Manchester | 2023 |
| Alif Group Global Ltd | Worcester Park | 2026 |
| Align Dental Holdings Limited | Cradley Heath | 2025 |
| Align Financial Planning Ltd | Leamington Spa | 2025 |
| Align Holdings Limited | Rotherham | 2024 |
| Align Marketing & Sales Ltd | Cheltenham | 2025 |
| Align Pensions Limited | London | 2019 |
| Align Properties Ltd | Cardiff | 2019 |
| Align Property Finance Limited | Wickford | 2023 |
| Aligndent Holdings Limited | London | 2022 |
| Aligned Advice Ltd | Slough | 2025 |
| Aligned Finance Limited | Leeds | 2025 |
| Aligned Financial Planning Ltd | Moira | 2020 |
| Aligned Home Ventures Ltd | Preston | 2025 |
| Aligned Horizons Ltd | Rochford | 2024 |
| Aligned Partners Ltd | London | 2025 |
| Aligned Syndicate Ltd | Poole | 2025 |
| Aligned Wealth Financial Planning Ltd | Haywards Heath | 2025 |
| Alignment Holdings Ltd | Fareham | 2025 |