| Alive Holdings Ltd | Swadlincote | 2018 |
| Alive Imagery Limited | Warrington | 2017 |
| Alive Photography Ltd | Warrington | 2025 |
| Alive Services Ltd | Dalkeith | 2018 |
| Alive to Thrive Ltd | Preston | 2018 |
| Alive Visualisation Ltd | Warrington | 2025 |
| Alive With Ideas Limited | Basingstoke | 2009 |
| Alivelogic Limited | Shepperton | 2011 |
| Alively World Limited | London | 2023 |
| Alivepixel Limited | London | 2021 |
| Alivero Limited | Abingdon | 2000 |
| Alivian Capital Limited | Borehamwood | 2021 |
| Aliway MED Limited | London | 2025 |
| Alix C Consultancy Ltd | Spalding | 2015 |
| Alix Day Ltd | Lincoln | 2020 |
| Alix Freeman Limited | Swindon | 2023 |
| Alix GET Design Ltd | London | 2020 |
| Alix Gilmer Consulting Ltd | Monkton Coombe | 2023 |
| Alix Lawson Ltd | Epsom | 2018 |
| Alix Sibbald Creative Limited | Cheltenham | 2017 |
| Alix Walton Training & Consultancy Limited | London | 2007 |
| Alixio Group UK Limited | London | 2025 |
| Alixir Ltd | Derby | 2012 |
| Alixis Consulting Ltd | Walsall | 2025 |
| Alixity Limited | Newport | 2014 |
| Alixpartners Investments Services Limited | London | 2016 |
| Alixpartners Ltd | London | 2002 |
| Aliya Capital Ltd | London | 2022 |
| Aliz Consultants Limited | London | 2015 |
| Aliz Consulting CIC | Cleckheaton | 2025 |
| Aliz Group Ltd | Cleckheaton | 2025 |
| Aliz Professional Services Ltd | London | 2025 |
| Aliza Business Solutions Ltd | Luton | 2021 |
| Aliza's Marketing Consultancy Ltd | Romford | 2018 |
| Alizai Group Ltd | Harrow | 2019 |
| Alizart Consulting Ltd | Leicester | 2020 |
| Alize Ltd | London | 2018 |
| Alize.Digital Ltd | Wakefield | 2024 |
| Alizent UK Limited | Manchester | 2011 |
| ALJ Consultants Ltd | Sheffield | 2025 |
| ALJ Consulting and Services Ltd | Nairn | 2024 |
| ALJ Consulting Services Limited | Croydon | 2023 |
| ALJ Engineering Limited | York | 2017 |
| ALJ Engineering Services Ltd | Chepstow | 2024 |
| ALJ Kitchens Ltd | Liverpool | 2021 |
| ALJ LDN Ltd | Croydon | 2018 |
| ALJ Limited | Alresford | 2022 |
| ALJ Locum Services Ltd | Leeds | 2024 |
| ALJ UK Services Company Limited | London | 2020 |
| ALJ Wealth Management Limited | Manchester | 2019 |
| Aljabir & Co. Ltd | Barnet | 2013 |
| Aljac Holdings Limited | Portsmouth | 1998 |
| Aljazirah Newspaper Ltd | Romford | 2024 |
| Aljenna Ltd | Hemel Hempstead | 2023 |
| Aljo Consultancy Ltd | Stockton-On-Tees | 2022 |
| Aljo Consulting Limited | Stoke-On-Trent | 2026 |
| Aljo International Limited | London | 2012 |
| Aljoha Consulting Ltd. | Edinburgh | 2018 |
| Aljomix Limited | Lytham St.Annes | 2012 |
| ALK Consultancy Limited | Woking | 2025 |
| ALK Consultancy Services Limited | Maidstone | 2024 |
| ALK Consultants Ltd | Esher | 2026 |
| ALK Digital Media Ltd | Choppington | 2022 |
| ALK Inspections Ltd | Hartlepool | 2024 |
| ALK Management Ltd | London | 2024 |
| ALK Projects Ltd | Oldham | 2024 |
| Alka Avtar Enterprises Limited | London | 2018 |
| Alka Consultancy Ltd | London | 2026 |
| Alka Management Ltd | Lichfield | 2018 |
| Alka Stealth Ltd | London | 2023 |
| Alkadiri Consultancy Group Ltd | Hornchurch | 2024 |
| Alkagesta (UK) Limited | London | 2024 |
| Alkaid Works Ltd | Carlisle | 2024 |
| Alkali Environmental Limited | Leeds | 2018 |
| Alkaline Capital Ltd | London | 2023 |
| ALKALINE360 Consultancy Ltd | Alcester | 2026 |
| Alkalize Ltd | London | 2025 |
| Alkally Ltd | London | 2023 |
| Alkame Limited | Torpoint | 2012 |
| Alkami Ventures Ltd | London | 2022 |
| Alkamis Ltd | Cambridge | 2023 |
| Alkane Engineering Ltd | Nottingham | 2015 |
| Alkasun Limited | High Wycombe | 2021 |
| Alkatraz Media Ltd | Surrey | 2015 |
| Alke Capital Partners Limited | Poole | 2019 |
| Alke Investments Ltd | Robertsbridge | 2026 |
| Alkebulan Capital Limited | Woking | 2021 |
| Alkebulan Enterprise Ltd | Halifax | 2022 |
| Alkegen UK Holdco II Ltd. | St. Helens | 2023 |
| Alkemi Consult Limited | Nottingham | 2025 |
| Alkemia Limited | Bromley | 2006 |
| Alkemin Consulting Limited | Sevenoaks | 2026 |
| Alkemist Advisory Ltd | Canary Wharf | 2025 |
| Alkemist Limited | St. Albans | 2015 |
| Alkemy Akademy Ltd | London | 2024 |
| Alken Engineering Group Limited | High Peak | 2020 |
| Alken Engineering Limited | High Peak | 2015 |
| Alken Services Limited | Pontefract | 2016 |
| Alken Systems Limited | High Peak | 2015 |
| Alker Elliott Accountants Limited | Manchester | 2023 |