| AI Mistral Parentco Limited | Manchester | 2016 |
| AI Mistral Topco Limited | Manchester | 2016 |
| AI Mobility Group Ltd | Stockton-On-Tees | 2025 |
| AI Pathfinder Holdings Limited | London | 2025 |
| AI Pathfinder Inc Limited | London | 2025 |
| AI Pave UK Limited | London | 2026 |
| AI Phantix Ltd | London | 2025 |
| AI Power Trading Ltd | London | 2024 |
| AI Seed 2 Nominees Ltd | Macclesfield | 2019 |
| AI Semas Technologies Ltd | Glasgow | 2024 |
| AI Silk UK Midco 1 Limited | London | 2021 |
| AI Silk UK Midco 2 Limited | London | 2021 |
| AI Silk UK Midco 3 Limited | London | 2021 |
| AI Sky AUS Finance Limited | Newcastle Upon Tyne | 2019 |
| AI Sky CDN Finance Limited | Newcastle Upon Tyne | 2020 |
| AI Sky NZ Finance Limited | Newcastle Upon Tyne | 2019 |
| AI Sky UK Bidco Limited | Newcastle Upon Tyne | 2019 |
| AI Sky UK Holdco Limited | Newcastle Upon Tyne | 2019 |
| AI Solutions Group Ltd | Kington | 2025 |
| AI Special PFI SPV Limited | London | 2012 |
| AI Speciality Limited | London | 2025 |
| AI Stocks Ltd | London | 2023 |
| AI Stylelab Ltd | Kington | 2022 |
| AI Topco Limited | London | 2026 |
| AI Ventura Ltd | Chatham | 2025 |
| AI Venture Builder Ltd | London | 2023 |
| AI Wertheimer Debtco UK Limited | London | 2017 |
| AI Wertheimer Holdco UK Limited | London | 2017 |
| AI Wertheimer Midco UK Limited | London | 2017 |
| AI Wertheimer Parentco UK Limited | London | 2017 |
| AI-4X Ltd | London | 2023 |
| Ai-Recruiter Hrtech Ltd. | Uckfield | 2025 |
| AI2ALPHA Trading Ltd | Watford | 2020 |
| AI4TRANSFORMATION Limited | London | 2025 |
| AI5 Investments Limited | Knowle, Solihull | 2018 |
| AIA (Cambridge) Ltd | Cambridge | 2005 |
| AIA (ST Neots) Ltd | Cambridge | 2020 |
| AIA Lifetime Ltd | Cambridge | 2024 |
| AIA MC Holdings Ltd | Peterborough | 2024 |
| AIA Property Finance Ltd | Ilford | 2023 |
| AIA Textiles Limited | London | 2005 |
| Aiac Holdings Limited | London | 2026 |
| Aiaia Limited | Nottingham | 2020 |
| Aiart Limited | London | 2024 |
| AIB (K) Limited | Leeds | 1988 |
| AIB (L) Limited | Leeds | 2021 |
| AIB Asset Management Holdings Limited | London | 1995 |
| AIB Corporate Leasing Limited | London | 1980 |
| AIB DC Pensions (UK) Limited | St Albans | 2004 |
| AIB Group (UK) P.L.C. | Belfast | 1985 |
| AIB Holdings (N.I.) Limited | Belfast | 1989 |
| AIB Investments 2025 Limited | Bristol | 2025 |
| AIB Investments Limited | Bristol | 2024 |
| AIB PFP (General Partner) Limited | Edinburgh | 2013 |
| AIB Protect Limited | London | 2025 |
| AIB Reward & Wellbeing Ltd | Coventry | 2019 |
| AIB Risk Management Ltd | London | 2019 |
| AIB Risk Solutions Ltd | Manchester | 2022 |
| Aiba Holding Ltd | Manchester | 2024 |
| Aibel Finance Limited | Portsmouth | 2006 |
| Aibel Group Limited | Portsmouth | 2003 |
| AIC Environmental Engineering Ltd | Armagh | 2024 |
| AIC Financial Limited | Earls Colne | 2007 |
| AIC Media Group Limited | Glasgow | 2025 |
| AIC Pensions & Investments Ltd | Armagh | 2018 |
| Aica Holdings Limited | Borehamwood | 2026 |
| Aich Nine Ltd | Southampton | 2026 |
| Aict GBP Real Estate (Curtain House) General Partner Limited | Perth | 2021 |
| AID Co Ltd | Ardrossan | 2021 |
| AID Properties Ltd | Brighton | 2024 |
| Aidami Limited | London | 2020 |
| Aidan a Holdings Ltd | Walsall | 2024 |
| Aidan DOW Wealth Management Limited | London | 2015 |
| Aidan DOW Wealth Protection Limited | London | 2016 |
| Aidan O'Reilly Consultancy Ltd | Wellingborough | 2017 |
| Aidas Group Ltd | Birmingham | 2019 |
| Aidblanket Community Interest Company | Warrington | 2025 |
| Aidecrest Property Holdings Ltd | Manchester | 2025 |
| Aiden Finance Company Ltd | London | 2025 |
| Aiden's Bar Limited | Southampton | 2020 |
| Aidenpro Limited | Stanmore | 2013 |
| Aiding Sophie Limited | Ramsgate | 2024 |
| Aidinwalls Ltd | Coventry | 2023 |
| Aido Group Limited | Knutsford | 2018 |
| Aidos Capital Limited | Stanmore | 2022 |
| Aidronics Ltd | London | 2026 |
| Aidsend Remittance Ltd | Croydon | 2025 |
| Aidsun Holdings Limited | Dundee | 2005 |
| Aidyn Ventures Ltd | London | 2026 |
| AIE Assets Limited | Darlington | 2025 |
| AIE Global (UK) Limited | Southwell | 2021 |
| AIE Group Limited | Thornton Heath | 2024 |
| Aiesha H Holding Ltd | Keighley | 2025 |
| AIF Fashion Holdings Ltd | Bolton | 2023 |
| AIF GPP Arise Limited | London | 2019 |
| Aific Limited | Beaconsfield | 2024 |
| Aifx UK Ltd | Liverpool | 2025 |
| AIG Europe (Services) Limited | London | 1953 |
| AIG Management Services Ltd | Wisbech | 2024 |
| AIG Securities Limited | Chesterfield | 2021 |