| Aardvark Midco 2 Limited | London | 2021 |
| Aardvark Stratton Holdings Ltd | Wigston | 2021 |
| Aardvark Topco Limited | London | 2021 |
| Aardvark Trustee Company Limited | Tidworth | 2025 |
| Aardvark Underwriting Limited | London | 1998 |
| Aardvarkinsure.Com Limited | Bexhill-On-Sea | 2015 |
| Aardvic Holdings Ltd | York | 2021 |
| Aare Labs Ltd | Oxford | 2025 |
| Aareen Consulting Limited | Cheam | 2015 |
| Aareesar Limited | Ilford | 2023 |
| Aarem Holdings Ltd | Colchester | 2018 |
| Aareva Ltd | Harrow | 2019 |
| Aarhus Fire Group Limited | Manchester | 2025 |
| Aariix Ltd | Luton | 2026 |
| Aarjai Ltd | Pinner | 2025 |
| Aark Capital Limited | London | 2024 |
| Aark Invest Ltd | Farnborough | 2026 |
| Aarkiya Group Ltd | Rugby | 2025 |
| Aarna Holdings Limited | Stanmore | 2019 |
| Aarnic Bridging Comparison Ltd | Watford | 2021 |
| Aarnikotka Limited | Leeds | 2021 |
| Aarohan Investments Ltd | Leigh-On-Sea | 2022 |
| Aarohi Capital Ltd | Pinner | 2026 |
| Aaron Capital Management Limited | London | 2005 |
| Aaron Cover Ltd | Hounslow | 2023 |
| Aaron Northridge Limited | Nottingham | 2019 |
| Aaron Shaw Ltd | Manchester | 2026 |
| Aaron Webb Ltd | Delph | 2024 |
| Aaron Wheeler Holdings Limited | Woodford Green | 2021 |
| Aarons Property Limited | Croydon | 2025 |
| Aarsha Ltd | Redditch | 2020 |
| Aarti Paneer Ltd | Leicester | 2025 |
| Aarubi Finance Ltd | Rugby | 2025 |
| Aarw Holdings Ltd | London | 2025 |
| Aaryan (AB) Holdings Limited | Wolverhampton | 2025 |
| AAS Financial Services Ltd | Hartlepool | 2022 |
| AAS Group Holdings Ltd | Harmondsworth | 2026 |
| AAS Properties Holdco Limited | London | 2026 |
| AAS Realisations (2025) Limited | Leeds | 2020 |
| Aasha Holdings Ltd | Kington | 2026 |
| Aashaard Ventures Ltd | Ilford | 2023 |
| Aask Group Limited | High Wycombe | 2022 |
| Aask US Holdings Limited | Bicester | 2012 |
| Aasra Group Limited | Sidcup | 2025 |
| Aasreya Holdings Ltd | Kington | 2026 |
| AAT Healthcare Limited | Rotherwas | 2023 |
| AAT Holdings Limited | Downpatrick | 2019 |
| AAT Investment Co. Limited | Sheffield | 2025 |
| AAT Rees Ltd | Macclesfield | 2021 |
| Aatt Investments Limited | Stonehouse | 2019 |
| AAV Consulting Ltd | London | 2014 |
| AAV Investments Limited | Northampton | 2019 |
| Aavaar Investments Ltd | Leicester | 2024 |
| Aavid Thermalloy UK Ltd | Ashington | 1999 |
| Aavt Holdings Ltd | Longfield | 2024 |
| Aawj Holdings Limited | London | 2020 |
| Aawl Holdings Limited | Bridlington | 2021 |
| Aawmr Ltd | London | 2024 |
| Aaws Holdings Limited | Shenstone, Nr Lichfield | 2018 |
| AAX Investments Ltd | Ellesmere Port | 2026 |
| Aayaana Holdings Ltd | South Kensington | 2025 |
| Aayillah Care Ventures Limited | Highbridge | 2025 |
| Aaym Investments Ltd | Mirfield | 2025 |
| Aaztec Holdings Limited | York | 2025 |
| Aazzur (Nominee 1) Limited | London | 2017 |
| AB & Co Capital Ltd | Reading | 2024 |
| AB & S Holdings Limited | London | 2023 |
| AB 2026 Holding Limited | Stoke On Trent | 2026 |
| AB Accountancy South West Holdings Ltd | Holsworthy | 2026 |
| AB Analysis Trading Ltd | Ware | 2021 |
| AB and N Holdings Ltd | Salford | 2000 |
| AB Associates (Lanarkshire) Ltd. | Bellshill | 2015 |
| AB Boutique Hotels Ltd | London | 2025 |
| AB Boutique Hotels Operations Ltd | London | 2025 |
| AB Boutique Hotels Operations Selsdon Ltd | London | 2026 |
| AB Broker Services Limited | Exeter | 2024 |
| AB Concept Business Solutions Ltd | Preston | 2018 |
| AB Dynamics Overseas Holdings Limited | Bradford On Avon | 2020 |
| AB Dynamics UK Holdings Limited | Bradford On Avon | 2020 |
| AB Electrical Wholesalers Holdings Limited | York | 2025 |
| AB Enterprise Group Ltd | Romford | 2023 |
| AB Equity Partners Ltd | London | 2024 |
| AB Finance Limited | Leeds | 2016 |
| AB Financial Group Ltd | Benfleet | 2025 |
| AB Financial Ltd | Kendal | 2026 |
| AB Financial Services Ltd | Southampton | 2023 |
| AB Fininvest Ltd | London | 2025 |
| AB Furnishing Holdings Ltd | Mansfield | 2017 |
| AB Group Finance Limited | Ebbw Vale | 2016 |
| AB Group Holdings Ltd | Redhill | 2016 |
| AB Group Ventures Limited | Wigan | 2026 |
| AB Hats and Accessories Holdings Limited | Rustington | 2021 |
| AB Holdco Limited | West Molesey | 2022 |
| AB Holdings Group Ltd | Northampton | 2019 |
| AB Hub Services Ltd | Cheadle | 2023 |
| AB Inbev America Holdings Limited | London | 2014 |
| AB Inbev Australia Holdings Limited | London | 2014 |
| AB Inbev Australia Investment Holdings Limited | London | 2018 |
| AB Inbev Finance South Africa Limited | London | 2018 |
| AB Inbev Finance South African Holdings Limited | London | 2018 |